Does your wall feel damp in the corners, on the external walls or behind your furniture as soon as it gets sweltering outside? If so, there’s a good chance you’re dealing with summer condensation. Warm air contains a huge amount of moisture and cools down suddenly when it comes into contact with cooler surfaces, such as thick external walls or cellar walls. As cold air can hold less moisture, water droplets form immediately.

You’ll recognise the phenomenon of damp walls against a wall that feels warm to clammy on hot summer days, with a relative humidity that remains stuck above 60% on a digital hygrometer for long periods.

But does the wall remain damp even on cool, dry days, or can you see paint flaking off at the bottom of the wall? If so, you’re dealing with a deeper-seated structural damp problem such as rising damp or penetrating moisture.

• Rising damp: Ground moisture that rises through the foundations and, due to rapid evaporation in the summer, white salt crystals or saltpetre leaves a mark on the underside of the wall.
• Penetrating moisture: Rainwater that seeps through a porous, damaged façade and saturates the wall from the outside in.
• Structural condensation moisture: A lack of continuous ventilation in the home, meaning that the moisture produced every day by cooking, showering or breathing has nowhere to go.

AquaConsult’s professional damp-proofing solution

Treating the symptoms – such as using a standalone dehumidifier – won’t help if the cause of the damp problem lies in the wall structure or the foundations. AquaConsult carries out a thorough damp survey to determine the exact nature of the damp problem.

• Is it summer- or condensation moisture? In that case, we’ll install a certified mechanical ventilation system, such as the Type D balanced ventilation system with heat recovery, for optimum air circulation.
• Is this about rising damp? Then we’ll carry out a professional wall injection Finish with a water-repellent gel.
• At penetrating moisture we protect the façade using a breathable water-repellent treatment or facade impregnation.

No matter how thoroughly you clean, that typical, musty cellar smell keeps coming back into the hallway, the storage room or the utility room on hot summer days. Moisture problems are often heard and smelled first, before there is black mould spores or at all mould on the wall appear.

The cause of this is the combination of heat and stagnant, damp air, which leads to micro-condensation forming in hidden places. This creates the ideal breeding ground for bacteria and mould. Even before mould patches appear, these spores are already emitting gases that cause the familiar musty smell in the home. You’ll notice this particularly in classic blind spots such as behind large pieces of furniture against an external wall, in dark corners behind curtains or in a poorly ventilated laundry room.

AquaConsult’s professional damp-proofing solution

AquaConsult carries out an in-depth assessment of humidity and air quality based on a damp survey to pinpoint the source of the musty smell. If the smell is caused by penetrating moisture or poor ventilation, we combine targeted wall treatments, such as facade impregnation, with active ventilation. Is the odour coming from underground? If so, we’ll tackle the problem at its source once and for all by making the cellar walls or floor completely watertight using basement waterproofing or basement drainage.

On a hot summer’s day, you throw the cellar windows wide open to let the air in, but afterwards the walls feel even damp. This may sound counterintuitive, but it’s pure physics. It’s one of the most common mistakes made when moisture problems in the summer.

A cellar maintains a constant, low temperature thanks to the surrounding soil. As soon as the humid summer air flows in and cools down, condensation immediately forms on the cold surfaces. The walls will then literally start to ‘sweat’. Do you still want to ventilate the cellar? If so, do this in the early morning or at night, when the outside temperature is lower. This ensures the walls dry out effectively and provides fresh air.

You recognise a damp cellar After natural ventilation, water droplets will form on the ceiling and walls, and this happens immediately after you’ve opened the windows. You should therefore only ventilate at night or in the early morning, when it’s cooler outside.

AquaConsult’s professional damp-proofing solution

Remains the damp cellar Does it feel damp, even if you adjust the natural ventilation? If so, this is due to groundwater seeping in under high pressure. AquaConsult offers two permanent solutions to this problem.

• Basement sealing: Applying a high-quality, waterproof cement coating to the cellar walls and floor.
• Basement drainage: A studded membrane and pump system are installed, which collect any infiltrating groundwater and drain it away automatically.

The dehumidification mode, often indicated by a water droplet icon or the word ‘Dry’, is a built-in function of most modern air conditioners and heat pumps. But what exactly does this mode do in your home?

The crucial difference: This function is designed solely to relative humidity to reduce the temperature of the ambient air on hot summer days. It is a by-product of the cooling process, not a treatment of damp walls or other damp problems.

In the summer, many people find that moisture problems worsen or suddenly become apparent. Warm outdoor air can hold more moisture than cold air. As soon as this warm, humid summer air enters your home and comes into contact with colder surfaces such as cellar walls, external walls or uninsulated floors, it immediately causes condensation moisture.

It would therefore seem to be a clever solution to the air conditioning to set it to the dehumidification mode. But don’t be misled, because there is a key difference between temporary dehumidification via the air conditioning and actual moisture control.

What the dehumidification mode on your air conditioning actually does

The dehumidification setting on your air conditioning does exactly one thing: it temporarily reduces relative humidity from the air present in the room at that moment. It extracts water vapour from the ambient air and discharges it as condensation. This makes the room feel less stifling and immediately provides a sense of comfort on a hot summer’s day.

Why air conditioning is definitely not a solution for tackling damp

Although the air in the room feels drier, an air-conditioner does absolutely nothing to tackle the cause of the damp in your home.

• The physical source of the fluid remains untreated: An air-conditioning unit dries the ambient air, but does not dry damp walls, floors or foundations. Groundwater seepage, rising damp or rainwater that seeps in through a porous façade will continue to enter your home unabated. The flow of water isn’t stopped by pressing a button on an air-conditioning remote control.
• Moisture deeper within the structure is not reached: Moisture penetrates deep into the bricks, concrete, plaster and wooden structures. An air-conditioning system only tackles the surface moisture in the air. The core of your walls and the foundations remain damp, causing the structural condition of your house to deteriorate.
• A false sense of security and hidden damage: Because the musty smell in the room disappears and condensation on the windows When the weather clears up, you think the problem is sorted. Meanwhile, moisture builds up unnoticed behind skirting boards, kitchen cupboards, cupboard walls and under the floor.
• Mould continues to grow behind the scenes: Mold They need damp building materials and stagnant air to grow. As the walls themselves remain damp, the back of the wallpaper, the plasterboard and the timber still provide an ideal breeding ground for harmful black moulds, even if the air in the room feels dry.
• No effect on hygroscopic salts: In the case of persistent damp problems such as rising damp draw salts from the ground or the brickwork up to the surface. These salts continuously attract new moisture from the surrounding environment. An air-conditioning system can salt efflorescence not neutralise or stop.
• A local approach rather than a comprehensive one: An air-conditioning unit only dehumidifies the specific room in which the indoor unit is installed. The damp problem simply shifts to other rooms, corridors, the loft or the cellar, where the air-conditioning unit cannot reach.
• Like trying to mop up with the tap running: An extreme high energy bill. As the source of moisture has not been sealed off, new moisture flows continuously into the room from the building structure or the outside air. As a result, the air conditioning has to run continuously at full power to keep the air dry. This leads to a high energy bill without your home becoming any drier as a result, even for a single day.

In short: The dehumidification mode on an air-conditioning unit is a feature designed to climate comfort during hot summer days, but it is not a method for tackling damp in the building structure. It removes moisture from the air, but it does not eliminate the damp problem in your home.

At AquaConsult, we see every day how homeowners try to tackle damp in their homes using the dehumidification setting on their air conditioning. Although an air-conditioner the relative humidity in the home Although it temporarily reduces the damp, it does not offer any long-term solution to the damp problems in the house.

That is why we are doing everything we can moisture problems a summary of what air conditioning can and cannot do to address this problem, and how we at AquaConsult can help you with this resolve once and for all.

1. Rising damp

• The problem: At rising damp Groundwater is drawn up into the masonry due to the absence of, or the presence of a damaged damp-proof course. This causes paint to flake, wallpaper to come away, salt efflorescence and damp walls at the base of the ground floor.
• What the air conditioning does: The air conditioning only dries the surface of the wall and the moisture in the air in this particular room. Groundwater continues to rise unabated due to the capillary action of the bricks.
• AquaConsult’s definitive solution: Wall injection. We drill holes just above floor level and inject a high-quality moisture-resistant gel. This expands, sets and forms a permanent waterproof barrier that blocks rising damp for good. Once the area has dried out, we carry out the necessary repair and plastering work using a salt-resistant membrane.

2. Penetrating moisture

• The problem: At penetrating moisture During heavy rainfall or strong winds, rainwater seeps deep into the façade through a porous, ageing or damaged external wall. This eventually causes damp patches on the internal walls.
• What the air conditioning does: The air conditioning can temporarily dehumidify the air inside, but it does not stop rainwater seeping in from the outside. The external wall remains like a sponge that soaks up water all over again with every downpour.
• AquaConsult’s definitive solution: Facade impregnation. After repairing the cracks and the damaged pointing, we spray the façade with a transparent, water-repellent liquid. This causes rainwater to bead up and roll off immediately, whilst still allowing the façade to breathe.

3. Damp basement

• The problem: The cellar is underground and is constantly under high pressure from the surrounding groundwater. Moisture seeps through the cellar walls or the joint between the floor and the wall. This leads to a damp cellarr. It is a damp, unusable space that spreads a musty smell throughout the house.
• What the air conditioning does: An air-conditioning unit can drain condensation, but it is by no means capable of withstanding the continuous hydrostatic pressure of the groundwater.
• AquaConsult’s definitive solution: Basement sealing or basement drainage. Cellar waterproofing involves applying several waterproof cementing and bonding layers to the walls to seal the cellar completely airtight. We carry out basement drainage in cases of extremely high groundwater pressure. In such cases, we install a dimpled membrane on the walls and/or floor to collect any water seeping in and automatically pump it away to the sewer system. If required, we can also ensure a neat and hygienic finish.

4. Damp walls

• The problem: Damp walls caused by water entering through pour holes, gravel pockets, formwork holes or cracks in the concrete structures.
• What the air conditioning does: The air conditioning does not affect the physical openings or cracks in the concrete. Water will continue to seep in as soon as the water pressure rises.
• AquaConsult’s definitive solution: Concrete injection. We inject a two-component polyurethane or epoxy resin directly into the cracks in the concrete under very high pressure. The resin reacts immediately with the water present, expands and seals the crack watertight right down to its core 100%.

5. Condensation moisture

• The problem: Condensation moisture is caused by everyday human activities such as cooking, showering, drying laundry and even breathing, which causes condensation to form on cold surfaces due to insufficient ventilation in the home.
• What the air conditioning does: Whilst in cooling and dehumidification modes, the air conditioning system filters some moisture out of the ambient air, but mainly recirculates recycled indoor air throughout the house. It does not extract polluted air, nor does it bring in fresh, oxygen-rich outdoor air.
• AquaConsult’s definitive solution: Professional ventilation system. We install a controlled mechanical ventilation system that continuously and energy-efficiently maintains the relative humidity by extracting stale, damp air and supplying fresh air.

6. Mould on the walls

• The problem: Mold on the walls These are unsightly and, above all, unhealthy damp patches, usually found in the corners, behind cupboards or on the ceilings of the bathroom and bedroom.
• What the air conditioning does: Air conditioning can temporarily make the air drier, but it does not remove the mould spores. What’s more, the plaster and the wall remain damp, which means the mould simply continues to grow. In fact, a poorly maintained air conditioning system can fungal spores blow it right through the whole house.
• AquaConsult’s definitive solution: We tackle the underlying damp problem – such as rising damp, condensation or water seepage – once and for all using the right moisture control. Only once the wall is structurally dry and the ventilation is in order will the conditions that allow mould to grow be eliminated. We then carry out professional repair and plastering out.

7. Damp in a new-build home

• The problem: Building moisture Thousands of litres of water are used during construction in screed, quick-setting bricks, concrete and plasterwork. It can take one to two years for this construction moisture to disappear completely from the structure.
• What the air conditioning does: An air-conditioning system is not designed to continuously remove large amounts of building moisture. It merely reduces surface humidity, but does little to speed up the drying process of the building materials deep within the structure.
• AquaConsult’s definitive solution: A combination of a well-thought-out mechanical ventilation system to remove the constant moisture emissions, supplemented where necessary by structural measures moisture diagnosis to rule out the possibility of thermal bridges or construction faults.

So when we think of damp problems, we automatically think of winter. Yet condensation in summer is a persistent problem. But what exactly is it, and how can you tell the difference between it and other moisture problems And why is it that it surfaces during the hottest months of all?

Condensation moisture This simply occurs when water vapour in the air turns into liquid water. Air always contains a certain amount of invisible water vapour. As soon as that warm, humid air comes into contact with a cold surface, such as a window cooled by air conditioning, the air cools down so much in that specific spot that the moisture can no longer be retained. At that exact moment, the moisture condenses as water droplets on the glass.

How can you recognise this damp problem?

You can recognise summer condensation by a number of clear signs.

• Drops on the inside of your windows: You can see a haze of tiny water droplets or misted-up glass on the inside of the window. Not on the outside or between the panes.
• Wet window frames and window sills: Moisture collects in the corners of the window, causing it to run down and leave the window sill or silicone joints soaking wet.
• Typical damp patches: Condensation mainly occurs in rooms where the air conditioning is on, in wet and damp rooms such as the bathroom and kitchen, or on the windows on the shaded and north-facing sides of your home.
• Early-stage fungal infection: Small, black specks on the sealant edges around the window or on the adjacent plasterwork.
• A musty indoor environment: Despite the air conditioning, the room feels heavy, clammy and stifling.

Why does condensation form during the summer?

The fact that your windows fog up with condensation at exactly 30°C or 35°C is down to three specific summer factors.

1. Warm air contains much more moisture: The warmer the outside air, the more water vapour it can hold. Summer in the open air In Flanders, the weather is often extremely muggy and damp.
2. The air-conditioning effect: We’re using the air conditioning more and more often. The air conditioning cools the glass and the window frames significantly. This creates a huge temperature difference between the air inside the house and the cooled window surface.
3. The dew point is reached quickly: As soon as the warm, humid air comes into contact with the ice-cold window, the local air temperature drops immediately below the dew point. As a result, the air loses its moisture and your windows fog up straight away.

In short: Condensation in the summer is no coincidence, but the direct result of humid outside air coming into contact with a heavily air-conditioned indoor environment. Does this moisture linger every day? If so, that is proof of an imbalance in fluid levels and a lack of controlled ventilation in the house.

Condensation on your windows may seem like a harmless occurrence in summer, something you can simply wipe away with a cloth. But nothing could be further from the truth. Summer condensation is not a temporary moisture problem This will disappear as soon as the temperatures drop again. Sultry summer weather, combined with damp in the home, actually creates the perfect environment for a negative impact on your health, your home and your energy bill.

1. Rapid mould growth

Mold need two things to grow: moisture and heat. In winter, it is often too cold for mould to grow rapidly, but in summer, damp rooms turn into a breeding ground for mould.

• Toxic black mould on window frames: Water dripping from the windows collects on the windowsill and in the silicone joints. Due to the high summer temperatures, stubborn stains form here within a few days black mold.
• Invisible mould spores in the airflow: If mould starts to grow in damp areas around the window, Does your air conditioning system suck in these mould spores? and continues to circulate throughout the room.
• Musty summer odour in fabrics: The damp seeps into your curtains, upholstered chairs and clothes. Combined with the heat, this creates a heavy, clammy and musty atmosphere in the house.

2. Acute health problems

Many people think that their summer health problems are caused by hay fever, but often it is condensation moisture the real culprit at home.

• Respiratory and allergy attacks: The combination of summer mould spores and a surge in the house dust mite population – both of which thrive in warm, damp air – leads to constant sneezing, a feeling of breathlessness and itchy eyes.
• Poor sleep: Do you sleep in a room with high relative humidity And condensation on the windows? Then your body finds it difficult to release its own heat through sweating. You sleep restlessly, wake up feeling clammy and are more likely to suffer from headaches.
• Risk to vulnerable groups: Summer temperatures, and heatwaves in particular, are already hard on babies and the elderly. A damp and mould-contaminated indoor environment increases the risk of acute respiratory infections.

3. Rapid deterioration of your windows and interior

Summer condensation doesn’t just stay neatly on the window. The warm moisture can cause damage to your home surprisingly quickly.

• Damaged window frames and sealant edges: Condensation builds up in the bottom corners of the windows. The warm, damp air causes wooden window frames to rot and warp at an accelerated rate, whilst elastic silicone seals lose their adhesive strength and start to leak.
• Peeling plaster: Moisture seeping from the window into the surrounding wall causes paint, wallpaper and plaster start to flake or crumble around your windows within a single summer season.

4. Your air conditioning is working overtime

This is a huge pitfall in the summer. Humid air is simply extremely difficult to cool down.

• Loss of efficiency in your air conditioning: Your air conditioning It has to use an enormous amount of energy to first condense the excess moisture from the air before it can actually start to cool the room.
• High energy costs: Because humidity If the temperature remains structurally too high due to condensation, the air conditioning will continue to run at maximum power. You’ll hardly feel any cooling, but you’ll notice this immediately on a high energy bill.

5. Irreparable damage to thermal bridges

When the humid summer air condenses daily on the coldest spots around your window frames, the insulation material around the profiles becomes saturated. These areas turn into permanent thermal bridges. As a result, you’ll continue to struggle with persistent moisture problems.

In short: Condensation moisture laughing it off in the summer as a harmless side-effect of air conditioning is a costly mistake. It is a clear warning that the moisture balance in your home is severely disrupted. Anyone who fails to take action now will soon be faced with structural fungi and high repair costs.

When there’s condensation on the windows, the first instinct is to quickly open all the windows. In winter, it’s a good idea to let in dry outside air, but in summer this actually makes the damp problem much worse.

When you open the windows during the day in warm weather, you’re letting the heavy, muggy outside air straight in. As soon as this warm air comes into contact with the rooms cooled by the air conditioning, it cools down abruptly and the water vapour condenses even more quickly on your windows and walls.

What’s the right way to limit fluid intake in the summer?

Would you like to the condensation moisture Keep it under control straight away without making the problem worse? With these practical measures, you can take the first step towards a targeted solution.

• Smart ventilation: Keep all windows and doors on the side facing the sun closed during the day. Only open the windows at night or in the early morning, as the outside air is much drier once it has cooled down.
• Wipe the windows dry straight away: Wipe away any condensation that has formed on the inside of the windows straight away using a clean microfibre cloth. This will prevent the moisture from seeping into your wooden frames, window sills and sealant edges.
• Tackle the internal sources of moisture: Hang your wet washing outside. If you do have to dry it indoors, close the laundry room door and use a dehumidifier. Always use the extractor fan when cooking and cook with lids on the pans. Also, wipe the shower walls and tiles dry straight after showering and leave ventilation Leave to stand for at least 15 minutes.
• Use your air conditioning sensibly: Don’t set the air conditioning to an extremely low setting. The greater the temperature difference between the outside air and your windows, the quicker the dew point is reached and condensation forms.
• Take a reading with a hygrometer: Keep relative humidity Keep an eye on it. In a healthy indoor environment, this figure ranges between 40% and 60%. Does it consistently peak above 60% in the summer? If so, these DIY tips won’t be enough and you’re dealing with a structural moisture problem.

To understand why these white, powdery patches suddenly appear during this hot weather, we must first look at how saltpetre itself is formed.

The basics: What causes salt rash?

Saltpetre is not a living organism such as mould on the walls, but it is a chemical process. It is caused by an unhealthy interaction between damp, the masonry of your wall and oxygen.

1. The absorption of salts: Groundwater or rainwater seeping in finds its way through your walls. This water is naturally rich in dissolved salts and minerals, such as nitrates, sulphates and chlorides, which originate from the soil or the building materials themselves.
2. The chemical reaction: As soon as these salts in the wall come into contact with oxygen and the lime present in the cement or mortar, a chemical reaction takes place. New, hard salt compounds are formed.
3. Transport: As long as the wall is damp, these salts remain dissolved in the wall moisture in a liquid and invisible state. They travel, as it were, along with the flow of moisture towards the surface of your wall. This is why you see the white, powdery stains on your interior walls.

The acceleration: How does a heatwave affect this process?

If the salts have remained hidden within the wall all this time, why does the saltpetre only become visible during a heatwave? This is entirely down to the extreme rate of evaporation.

• The wall as a vacuum pump: During a heatwave, the sun beats down on your external walls and the temperature inside rises. Humidity Indoor temperatures then often rise, making the air humid.
• Lightning-fast evaporation: The moisture trapped deep within the walls is rapidly drawn to the surface by the heat, where it evaporates and dries out.
• The crystallisation shock: The heat causes the water or moisture to evaporate so quickly from the wall’s surface that the dissolved salts are left behind in a state of shock. They are unable to evaporate and change from a liquid to a solid state in a fraction of a second.

That sudden, widespread crystallisation is what you see on your walls – the infamous white saltpetre stains. The heatwave does not create the moisture itself, but it does act as a trigger that sets off the dormant moisture problem accelerates and displays on your wall.

Before you start using brushes or cleaning products, it is crucial to make the correct diagnosis. Saltpetre and mould on the wall At first glance, they look very similar; both can appear as a white, fluffy film on the wall. Yet they are completely different, persistent moisture-related problems, each requiring a very different approach.

How can you tell the difference?

To avoid choosing the wrong one moisture solution To get started, this checklist will help you spot the difference between saltpetre and mould straight away.

• Saltpetre rash: It is dry and powdery, with a crystalline texture, or it forms hard crusts. It also crumbles immediately when you rub it. The colour is always pure white or light grey. And it has no odour. During a heatwave, you’ll spot this problem straight away because it crystallises and dries out on a massive scale. To test whether it is indeed saltpetre efflorescence, take a few flakes and hold a lighter close to them. If the salt crystals melt or crackle softly without catching fire, then you are definitely dealing with saltpetre on your walls.
• Mould on the walls: It is soft, fluffy, stringy or slimy, making it feel rather damp to the touch. It may start out white, but it quickly turns grey, green, yellow or black. It also has a characteristic pungent, musty smell. In warm and, above all, damp conditions, the mould grows rapidly. You can test for it by smouldering the mould fibres. If you then smell burnt organic material, you can be sure there is mould on your walls.

The impact of a heatwave: Nitrate vs. mould

• What effect does heat have on saltpetre? As you may have read earlier, the heat causes the underlying damp problem to become much more pronounced. Saltpetre is a mineral process that actually causes the dry heat to cause it to form crystals. The heatwave therefore makes the saltpetre efflorescence immediately visible.
• How does heat affect mould: Mold are living organisms that thrive in still, warm and humid air. During a heatwave, we often cool our homes by an air-conditioning system Or let’s leave the cellar doors open. When the warm, damp outside air cools against a cold inside wall, this creates condensation. This is the ideal breeding ground for mould. The heat accelerates its growth, provided there is moisture present.

Why treating fluid retention without proper diagnosis is dangerous

If you mistake the white mould on your wall for saltpetre and brush it with a dry brush, you’ll be brushing millions of invisible mould spores into the air. You’ll then breathe these in, or they’ll settle elsewhere in the house to form new colonies. On the other hand, an anti-mould spray has absolutely no effect on chemical salt crystals or saltpetre. So you must first be sure of what you’re dealing with before you start treating it effectively for saltpetre – or vice versa.

Now that you’re sure you’re dealing with salt efflorescence on the wall, you still need to find out what the underlying cause is moisture problem This is what causes it. This is crucial in order to administer the correct treatment for the salt rash and the moisture problem.

Do you simply paint over the saltpetre stains? If so, the moisture present will continue to damage your walls, plasterwork and insulation. To tackle saltpetre once and for all, we need to take targeted moisture control eliminate the specific source of moisture.

1. Rising damp

• The pattern on the wall: You can see the white salt crystals, flaking paint and crumbling plaster in a distinct, horizontal band at the bottom of the wall, usually up to a height of 1.20 metres.
• The cause: Rising damp is the main cause of salt efflorescence in older homes. There is either no water barrier in the foundations, or the existing one is worn out. The brickwork acts like a sponge and draws the salty groundwater upwards.
• The ultimate solution to damp: Professional wall injection work using a water-repellent gel. This gel forms an impermeable barrier, preventing groundwater – and therefore the salts – from rising any further.

2. Penetrating moisture

• The pattern on the wall: Saltpetre efflorescence is found higher up on the wall, often on the external walls that are heavily exposed to driving rain and wind on the west or south-west side of the house.
• The cause: Penetrating moisture makes your façade porous, damages the joints or causes fine cracks in the external wall. Rainwater then penetrates deep into the façade and carries the salts into the internal walls.
• The ultimate solution to damp: A thorough façade renovation to repair the joints, followed by facade impregnation. We apply a transparent, breathable protective coating that immediately repels rainwater.

3. Damp basement

• The pattern on the wall: Fluffy, white patches of salt on the cellar walls or in semi-underground areas, which are often accompanied by a constantly damp atmosphere.
• The cause: Cellars are constantly under high pressure from the surrounding groundwater. If the cellar walls are not 100% watertight, moisture and soil salts will seep in, causing you to suffer from a damp cellar.
• The ultimate solution to damp: Depending on the severity, we opt for a professional basement waterproofing system, cementing and waterproofing the walls, or a basement drainage to drain off the excess water in a controlled manner.

4. Condensation and inadequate ventilation

• The pattern on the wall: White patches in the corners of the rooms, behind large cupboards or around the windows.
• The cause: Warm, humid indoor air – caused by cooking, showering or breathing – condenses on the cold parts of the wall, known as thermal bridges. Although the condensation moisture Although it does not contain any mineral salts of its own, it can activate salts that were already present in the bricks of the internal wall.
• The ultimate solution to damp: Installing a controlled mechanical ventilation system to maintain a healthy level of humidity at all times and to eliminate thermal bridges.

AquaConsult’s golden rule

Removing saltpetre without tackling the underlying source of damp is a complete waste of time and money. Only when the water supply is cut off by professional moisture control Once it has been completely sealed, the wall can begin to dry out and the salt build-up will stop for good.

When a heatwave hits our country once again, we find ourselves seeking relief from the heat indoors even more than usual during the summer. We often wake up with health problems, such as the air conditioning is immediately blamed.

But in reality, it’s a bit more complex. The combination of the extreme heat, high humidity and an incorrectly set or poorly maintained air-conditioning system poses a risk to your health in various ways.

When the outside temperature rises, the air can hold much more moisture. As soon as this warm, saturated air enters your home and comes into contact with the invisible, structural moisture problems, then there is a tropical indoor climate. If your air conditioning then tries to cool your home without tackling the underlying source of damp, a dangerous interaction occurs that has a direct impact on your body. There are, therefore, a number of specific health complaints caused by summer damp.

1. Breathing difficulties and an acute feeling of breathlessness

• Shortness of breath and chronic breathlessness: Warm air saturated with moisture literally feels heavier. The water vapour displaces some of the oxygen molecules, forcing your lungs to work much harder to take in enough oxygen. This leads to a constant feeling of breathlessness, especially during warm summer nights.
• Severe asthma attacks caused by air-conditioning shock: When you try to cool a room with structurally high humidity using an air-conditioning unit, the temperature drops rapidly, but the air remains saturated. In asthma and COPD patients, this triggers a sudden constriction of the airways due to the cold, damp airflow.

2. Allergic reactions caused by mould

• Chronic sneezing fits and a runny nose: Mold and house dust mites multiply rapidly as soon as the relative humidity rises above 60% in summer. Because an air-conditioning system constantly circulates the indoor air, millions of invisible mould spores and allergens are continuously blown around the room and inhaled. This keeps your immune system constantly on alert, resulting in a persistent runny nose or blocked sinuses.
• Stinging, red eyes and a sore throat: Mould spores, which are kept in suspension by the airflow from the air conditioning, settle directly on your mucous membranes. This causes persistent irritation, such as burning eyes and a constant, dry, tickly cough, which do not occur in a dry home.

3. Impaired thermoregulation

• Extreme tiredness and lack of sleep: To cool down during a heatwave, your body needs to be able to let sweat evaporate into the air. In a stuffy, damp house, the air is already too saturated. Sweat remains on your skin, you cannot release your body’s internal heat, and your heart rate remains high. This results in light, restless sleep and total exhaustion during the day.
• Severe headaches and migraines: A damp sleeping environment, combined with the barometric pressure of a heatwave, disrupts your body’s moisture balance. Add to this the fact that an air-conditioning system in a damp house struggles to maintain a stable temperature, leading to significant temperature fluctuations. These fluctuations cause the blood vessels in your head to constrict and dilate rapidly, which triggers migraines.

4. Skin problems and joint pain

• Flares of eczema, psoriasis and heat rash: Skin that is constantly damp in a humid room is prone to infection. When the air conditioning then pumps active but polluted, humid air into the room, the pores become blocked. This causes existing skin problems to flare up during a heatwave, which is, of course, accompanied by intense itching.
• Joint and muscle pain: The combination of high humidity and the cold draught from an air-conditioner penetrates deep into your joints. People with osteoarthritis or rheumatism often experience more stiffness and pain in a damp house during the summer than in a dry one.

5. The invisible danger: Bacterial lung infections

• The air-conditioning condensate tank hazard: When the humidity in the home is consistently too high, for example due to rising damp or a damp cellar, the air-conditioning system must drain litres of water per day. If, due to a design fault or overdue maintenance, this condensation water becomes trapped somewhere in the unit, the heat causes it to become a breeding ground for bacteria and harmful moulds. The system then blows these pathogens directly into your respiratory tract, which can lead to severe pneumonia.

These health problems never just appear out of the blue. They are the direct result of an unhealthy home. An underlying, untreated moisture problem is activated during a heatwave, and this, in combination with an air-conditioner which then spread the damp problem throughout the room, are the cause of your summer health problems.

The invisible amplifier: What damp problems arise in the summer?

Many Flemish people associate damp problems exclusively with winter. But nothing could be further from the truth. In summer, the heat causes sources of moisture within the building structure to evaporate more rapidly than usual, making the indoor humidity feel clammy and tropical.

• Summer condensation on cold surfaces: This is the typical summer damp problem. Warm and extremely humid outside air flows into your home through open windows or ventilation. As soon as this warm air comes into contact with the colder surfaces in the house, it cools down abruptly. This creates invisible, damp patches where fungi multiply rapidly, after which the air conditioning blows the mould spores throughout the room.
• Rising damp via the foundations: When a property has a missing or worn-out damp-proof course, the walls continuously absorb groundwater. The blazing sun heats these external walls intensely, causing the absorbed groundwater deep within the wall to evaporate inwards. This causes the humidity in your living spaces to shoot up, which makes the house feel even more stuffy.
• Climate change in the cellar: Cellars remain relatively cool in summer. When warm, humid air flows in through ventilation grilles in summer and comes into contact with the cold cellar walls, it immediately creates condensation. This creates a damp cellar for fungi. The unhealthy air, containing mould spores, rises through the floor and up the stairs to the rest of the house, where the air conditioning takes over.
• Penetrating moisture after intense, tropical summer downpours: Summer in Flanders is often characterised by sudden, heavy thunderstorms. This enormous volume of driving rain penetrates deep into porous, damaged walls or external walls without facade impregnation. As soon as the sun starts beating down on the façade again, an evaporation effect occurs. The moisture is then literally forced through the wall and into the building. This causes invisible damp patches behind cupboards and skirting boards.
• High internal moisture production: In the summer, we shower more often, sometimes dry our washing indoors and cook in warm rooms. If a home is not sufficiently mechanically ventilated will be, this remains body fluids linger in the air for an extremely long time due to the general summer heat. Even recently renovated homes that are still struggling with building moisture In summer, they turn into a greenhouse as soon as the temperature in the house rises.

The catalyst: How incorrect use of air conditioning exacerbates the damp problem

When there is a structural damp problem like this, we often try to combat the muggy heat with an air-conditioner. Although, in theory, an air-conditioning system purifies the air and removes moisture through condensation, incorrect use or poor maintenance in a damp house can actually have a negative impact on your health.

• Like trying to mop up with the tap running: An air-conditioning unit is designed to filter excess moisture out of the air. However, if litres of fresh moisture are constantly entering the home through the walls or the cellar, the unit simply cannot cope. The air-conditioning unit continues to run at full power to dehumidify, which leads to a huge energy bill, whilst the humidity remains at an unhealthily high level for your body.
• Creating a condensation shock: If you set the air conditioning to a very cold setting whilst it’s 30°C outside, the air in the room will cool down very quickly. Cold air can hold far less moisture than warm air. As there is already a damp problem in the house, the air immediately becomes supersaturated. So you’re blowing around an extremely clammy, cold mist that hits your mucous membranes straight away and triggers respiratory problems.
• The circulation of fungal spores: Because an air-conditioning system constantly recirculates the existing indoor air, in a damp house it acts as a distribution centre for allergens. The mould spores that form on the walls due to the damp problem are dislodged by the air flow from the air conditioning and blown non-stop around the room. As a result, you inhale these spores in much higher concentrations.
• Risk of blockages and bacterial growth due to excessive condensation: Precisely because the air conditioning system in a damp house has to extract so much water from the air, the internal drip tray or drain hose quickly becomes overfilled. If this water is prevented from draining away due to a minor blockage or a lack of maintenance, the warm indoor unit turns into the ultimate breeding ground for bacteria and fungi. As soon as you switch on the system, you are releasing these pathogens directly into your breathing zone.

A healthy indoor climate in summer requires a two-pronged approach. First, the underlying, structural damp problem must be resolved once and for all, before you can then set your air-conditioning system correctly.

Tackle the source of damp once and for all with AquaConsult’s damp-proofing solutions

As an expert in moisture control AquaConsult does not believe in merely treating the symptoms. For every specific damp problem in the summer, and certainly during a heatwave, we offer a targeted, certified moisture solution which keeps the house permanently dry:

• Solution to summer condensation: Mechanical ventilation systems. To prevent warm, humid outside air from condensing on cold walls, we install high-quality ventilation systems such as our Ventilation System D. These systems continuously monitor humidity levels and extract the humid air in a controlled manner before it has a chance to condense and cause mould to form.
• Solution for rising damp: The professional injecting the walls. Is your home affected by groundwater that evaporates into the walls due to the summer heat? We inject the affected walls with a high-quality, environmentally friendly gel that cures completely. This forms an impermeable, lifelong barrier – a new waterproofing layer – which rising damp is coming to a definitive end.
• Solution for a damp cellar: Basements or Basement drainage. To put a stop to the typical summer condensation and musty odours in the cellar, we make the space completely watertight. We do this by installing a cellar tank, sealing the walls with several layers of waterproof cement, or by fitting a cellar drainage system. With basement drainage, groundwater seeping in is automatically drained away via a dimpled membrane and a pump, ensuring that the air rising upwards is bone-dry and clean.
• Solution for penetrating moisture after summer showers: Facade impregnation. To prevent heavy, tropical downpours from seeping into your walls, we treat your external wall with a transparent, breathable coating. This façade impregnation makes the façade completely hydrophobic, or water-repellent. Driving rain will then roll straight off the wall, whilst the façade can still breathe from the inside.
• Solution for high levels of condensation or construction-related moisture: Mechanical ventilation. Remains body fluids or building moisture lingering in the warm indoor air? AquaConsult will then an accurate moisture measurement to map out the air circulation. By strategically installing mechanical ventilation in damp areas, such as the bathroom and kitchen, excess moisture doesn’t stand a chance of spoiling the air quality.

Air conditioning as your ally: Correct settings and essential maintenance

Once AquaConsult has resolved the structural damp problems, you can air conditioning finally doing what it’s really good at, namely acting as an efficient dehumidifier and air purifier, without overburdening your immune system.

Do, however, always follow these golden rules during a heatwave:

1. Use Dry mode: Do you feel a bit clammy, but don’t need the temperature to drop drastically straight away? If so, switch the air conditioning from Cool mode to Dry mode, which is indicated by the droplet symbol. In this setting, the fan runs at a lower speed. This allows the warm indoor air to remain in contact with the ice-cold evaporator for longer, ensuring maximum condensation and effective removal of moisture, without making the room freezing cold.
2. Please observe the 6°C rule: Avoid thermal shock and that infamous ‘air-con cold’. Make sure the difference between the indoor and outdoor temperatures never exceeds 6°C. Is it 31°C outside? Then set the air conditioning to a comfortable 25°C. This is cool enough to help you recover and gentle enough on your mucous membranes.
3. Filter cleaning and maintenance: As the air conditioning system filters and circulates the air, hygiene is crucial. During the summer months, make it a regular habit to clean the filters every month. Remove the filters from the indoor unit, vacuum out any dirt and, if necessary, rinse them with lukewarm water. Allow them to dry completely before putting them back in place. This prevents accumulated bacteria or remnants of old mould spores from being blown back into the air. Also, ensure that the condensate drain is free from blockages, so that no standing water remains anywhere in the system.

To understand why your energy bill shoots up when you use an air conditioner on hot summer days, we need to look at the physics behind cooling the humid air in your home. There is simply a big difference between cooling dry air and cooling humid air.

Scenario 1: Cooling dry air

This scenario is the ideal situation. When the air in your home has a healthy humidity level, between 40% and 60%, an air conditioner can do its job quickly and thus cool the air rapidly. Dry air has a low heat capacity, as it does not retain heat as well. As soon as you switch on the air conditioner, the unit simply needs to lower the temperature of the air – a process also known as ‘sensible cooling’. The air conditioner reaches the desired temperature within a few minutes. As a result, it consumes a minimal amount of electricity and the system quickly switches to an energy-efficient mode.

Scenario 2: Cooling humid air

This scenario is the energy guzzler in the story. Because do you suffer from rising damp or a damp cellar? In that case, the air in the house is constantly saturated with water vapour. Humid air has an extremely high heat capacity and retains heat very effectively.

When you switch on the air conditioning, something frustrating happens. At first, the temperature in the house barely drops. The air conditioning unit first has to condense and remove thousands of litres of invisible water vapour from the air. This condensation process consumes a lot of energy. Only once the air conditioning unit has extracted kilos of water from the air can it finally start to actually lower the temperature in your home.

This situation is sometimes compared to a car’s handbrake. Running an air-conditioner in a damp home is like driving a car with the handbrake on. The engine therefore has to work extremely hard and consumes exponentially more fuel and electricity to reach the same speed – or, in this case, a comfortable temperature.

So, if the source of the moisture problem If this isn’t addressed, new moisture will constantly continue to evaporate from the air. Your air conditioning is trapped in an endless, gruelling cycle of latent cooling. This causes your air conditioning’s power consumption to rise.

Would you like a full explanation and in-depth insight into why high humidity turns your home into a sauna on hot summer days? Then be sure to read our blog about “Why your home feels like a tropical rainforest during a heatwave”.

The answer is ‘yes’. An air-conditioner It’s an excellent way to reduce the humidity in your home yourself. In fact, it’s one of the most effective ways to quickly get rid of that damp, clammy feeling in your home.

How can an air-conditioning unit reduce humidity?

Dehumidification of the home actually takes place automatically as a by-product of the cooling process.

Warm, humid indoor air is drawn by the fan past the ice-cold heat exchanger – the fins – of the indoor unit. Because these fins are ice-cold, the air around them cools down rapidly. Cold air can hold far less water vapour than warm air. As a result, the water vapour in the air condenses immediately on the cold fins, just like your breath on a cold car window. This liquid water is then drained outside via a condensation drain pipe. The air that the air-conditioning blows back into the room is not only cooler, but also much drier.

How do you set the air conditioning correctly here?

If you specifically want to reduce the humidity in your home using an air-conditioner, in which case most modern systems offer two options on the remote control.

1. The standard cooling mode: The unit actively cools the room to the set temperature whilst automatically dehumidifying the air at the same time.
2. The dehumidification mode: This is usually indicated by a drop symbol. In this setting, the fan runs at a lower speed and the compressor focuses solely on cooling the slats to draw as much moisture as possible out of the air, without making the room itself freezing cold.

The best setting for your wallet is to use the dehumidification mode wisely. Aim for a healthy relative humidity of 50% to 55% and don’t set the air conditioning to the very lowest setting unnecessarily. Don’t leave the unit running 24/7 either. Use timers to stabilise the humidity during the most humid times of the day. Also, ensure regular maintenance. Clean filters and a clear condensate drain ensure that the air conditioning dehumidifies much more efficiently, which helps you save on your air conditioning bills.

Now that we know that an air-conditioner can dehumidify, we come to the crux of the financial miscalculation involved in making your home moisture-free using an air-conditioning system. Many people therefore ask themselves: “How long does it take to dehumidify using air conditioning?” The honest answer is that, as long as the source of the damp lies within the structure of your home, the process of dehumidifying the air will never stop.

As soon as you switch off the air conditioning, the moisture from the damp walls or the cellar immediately evaporates back into the living space. Within a few minutes, humidity in the house is too high again, which means you have to switch the appliance back on. You’re literally trying to mop up whilst the tap’s still running.

The maths: How much does this stopgap measure really cost you?

Let’s put this to the test and work out the extra electricity consumption of your air conditioner when used as a dehumidifier. The formula for calculating your air conditioner’s consumption is simple. Convert the number of watts the air conditioner uses into kilowatts by dividing by 1,000. You then multiply this figure by the number of hours the air conditioner runs at this wattage. This will give you the total number of kWh your air conditioner uses to dehumidify the air in your home.

Let’s work through an example together. Suppose that, due to constant moisture infiltration, your air conditioning has to run for hours every day to keep the indoor climate comfortable:

• In that case, the additional power consumption for an average air-conditioner can easily reach 450 watts per hour. If the air-conditioner runs at this setting for around 6 hours, that amounts to an additional consumption of 2.7 kWh per day.
• On a monthly basis, we can therefore easily work this out by multiplying the figure for your additional consumption by 30 days. In this case, we arrive at 81 kWh per month of additional consumption by your air conditioning.
• So, over the course of a year, we’re already talking about hundreds of euros a year in extra electricity used purely to an existing damp problem to mask the problem rather than resolve it permanently.

So if that clammy, damp feeling comes rushing back the moment the air conditioning switches off, then your money is flowing straight out through a constant energy leak. You’ll never manage to reduce the humidity in your home permanently this way.

The secret behind that stuffy feeling at home has everything to do with the physics of our indoor climate. Many people therefore wonder whether the temperature affects the humidity in the home. The answer is, of course, a resounding ‘yes’, and it explains exactly why your home can feel so uncomfortable in summer.

At AquaConsult, during the hot summer months, we’re often asked: “When is the humidity in the house actually too high?” In winter, we tend to associate damp with condensation on the windows, but in summer the signs are more subtle.

So a humidity level of 70% indoors is certainly too high. But what does this actually mean for your comfort? And why does it feel so stifling?

The last straw

During a heatwave, something unusual happens to the humidity indoors.

• The sponge becomes saturated: The air outside is simply warmer, which means it is full of moisture due to summer evaporation. And during a heatwave, this air also seeps into the house, leading to higher humidity.
• The air cools down indoors, but the damp remains: As you’ve already taken all the necessary measures, it’s a few degrees cooler inside than outside. But when this warm, humid air cools down indoors, it shrinks, as it were. The sponge gets smaller, but the amount of moisture remains the same.
• The last straw: Because the cooler indoor air can hold less moisture as it contracts, the relative humidity shoots up immediately to 70% or 80%. The air is then supersaturated.

So why does this feel so ‘tropical’ and stifling?

This is the point at which your body starts to protest. Normally, the human body cools itself down by sweating. The normal, dry ambient air absorbs the tiny droplets of sweat, causing your skin to cool down.

But if the relative humidity in your home exceeds 70%, the air is already so saturated with water vapour that there is no room left for your sweat. The sweat can no longer evaporate and remains on your skin. Your body can no longer release its heat, making you feel stifled and as if there’s not a breath of wind to be found.

The signs: How can you tell if the humidity is too high during a heatwave?

As you don’t have the heating on in summer and the windows are often open, you don’t tend to see condensation on the windows. However, there are other, very clear signs that indicate the humidity in your home is too high.

• Damp sheets and furniture: You get into bed and the bedding feels clammy or almost damp, as if it hasn’t dried properly.
• A musty smell: When you walk into a room, especially the bedroom or the cellar, there’s a typical, musty ‘cellar smell’.
• Skin that sticks: Even if you’re sitting still with the fan on, your skin won’t dry out and you’ll still be left with a shiny, sticky film.
• Wood that swells: Kitchen cupboards, interior doors or wooden floors may suddenly start to stick or become harder to close because the wood absorbs excess moisture from the air.
• Unexplained patches of mould: Small, dark spots suddenly appear behind cupboards or in the corners of the bathroom and bedroom. This is because mould thrives in these warm, tropical conditions.

Do you notice any of these signs in your home? If so, there’s a good chance that the moisture balance in your home has been seriously disrupted.

When you start to break out in a sweat and the walls of your home begin to radiate heat, most Belgians’ first instinct is, quite naturally, to seek relief through natural ventilation. We open everything up.

Although this feels very intuitive, natural ventilation during a heatwave is, unfortunately, the biggest pitfall for your indoor climate.

1. Leave windows and doors wide open in the evening and at night

• The idea: It’s getting cooler outside, so if I open everything up now, the heat will blow out of the house.
• The pitfall: Yes, the outside air feels cooler on your skin in the evening and around midnight, but that same night-time air is often extremely saturated with moisture in the summer. By leaving your windows wide open for hours on end, you create a draught that literally lets litres of invisible water vapour into your bedrooms and living rooms. As soon as you close the windows again in the morning, the moisture becomes trapped. You are then literally bringing the heat into your home yourself.

2. Leave windows slightly ajar or in the ‘tilt’ position during the day

• The idea: If I let in a breath of fresh air, at least it’ll still be possible to breathe inside.
• The pitfall: Leaving a window tilted open during a heatwave is an open invitation to the hot, humid air from outside. The hot, humid outside air flows in slowly but continuously. Because it is slightly cooler inside thanks to your sun blinds, the incoming air cools down, contracts and causes the relative humidity in your home to rise immediately to between 70% and 80%. In doing so, you create exactly the greenhouse effect you are trying to avoid.

3. Relying on built-in window ventilation grilles

• The idea: My windows have ventilation grilles, so natural air circulation takes care of it.
• The pitfall: Window vents operate on the basis of wind pressure and temperature differences. On a windless, sweltering summer’s day, there is hardly any pressure difference between indoors and outdoors. As a result, the vents do absolutely nothing, or they passively allow the warm, humid air to flow in without any active extraction to counteract it. There is no control whatsoever.

4. Creating cross-ventilation

• The idea: If I open the front door and the back window at the same time, I effectively drive the warm air out.
• The pitfall: Although a breeze indoors feels wonderfully cooling on your sticky skin at that moment, you’re filling the structure of your home with damp air. As soon as the doors close again, the airflow stops and the oppressive humidity is trapped in your furniture, walls and fabrics.

With natural ventilation, you are completely at the mercy of the whims of nature. You cannot filter the airflow, you cannot regulate it and, most importantly, you cannot remove the moisture from the air. You are bringing the tropical climate from outside straight into your own home. Anyone who wants to keep their home truly comfortable and dry during a heatwave needs to move away from natural ventilation and opt for control with our solution.

Damp in the home is not a one-size-fits-all problem that can be solved with a single universal method. That is why we have identified seven specific moisture problems, each of which has a completely different cause and a unique technical guide for repair.

• Damp walls: This is a generally destructive symptom. The walls can become saturated from the inside or the outside, leading to crumbling plaster and an unhealthy indoor environment.
• Damp basement: As a cellar is located underground, this space is constantly under pressure from the surrounding groundwater. This manifests itself as water seeping in, puddles on the floor or extremely high humidity.
• Rising damp: Groundwater that is drawn upwards through the foundations and walls due to the absence or failure of an outdated flood defence, just as a sponge soaks up water.
• Penetrating moisture: Rainwater that penetrates through a porous façade or via cracks in the external wall during strong winds or storms, saturating the internal walls.
• Condensation moisture: The warm, moist air produced by cooking, showering, washing or breathing, which cannot escape and condenses on cold surfaces. This is often caused by a lack of proper ventilation.
• Mould on the walls: This is the direct, visible result of prolonged damp conditions in the home. Mould develops in stagnant, damp air and affects both the walls and your health to.
• Damp in new-build homes: This is often caused by construction moisture, residual moisture from concrete and plaster that has not yet dried out completely, or residual moisture left behind due to construction faults during a phase of construction carried out too quickly.

The crucial importance of an accurate diagnosis of fluid imbalance

Why is it so dangerous to diagnose yourself? Because the symptoms of these damp problems all look very similar, but the different moisture solutions differ greatly from one another. An accurate, scientific diagnosis of damp is therefore vital for a number of reasons, both for your home and your wallet.

• Avoiding inappropriate and extremely expensive treatments: This is the most immediate risk. If you think you are suffering from rising damp and have your walls treated with an injection process, whereas in reality the problem is penetrating moisture . In that case, you’ll have spent thousands of euros on a damp-proofing treatment that won’t stop the rain from getting onto the outside of your façade.
• Targeted use of specific solutions for fluid management: Every damp problem requires a unique, technical solution. Without the correct diagnosis, you’ll be in the dark as to what the right method is for resolving the damp problem.
• Excluding or treating hygroscopic salts: When walls remain damp for a long time, harmful salts build up in them. Even once the original cause has been resolved, these salts continue to attract moisture from the air. An expert can measure these salts, whereas a standard damp meter cannot. Without this knowledge, your wall will always feel damp to the touch.
• Identifying the root cause rather than simply treating the symptoms: Scraping away mould or painting over a wall with damp-proof paint is like putting a plaster on a wound. A proper diagnosis identifies the exact source of the damp, so that you can tackle the problem at its root rather than just temporarily covering up the damage.
• Financial peace of mind and a guarantee: Professional damp-proofing specialists such as us at AquaConsult We provide a long-term guarantee on the work carried out. This guarantee can only be issued and honoured if an irrefutable and accurate damp survey has been carried out beforehand. It protects you from recurring costs.
• Avoiding unnecessary demolition and cutting work: Sometimes a damp problem seems like a huge issue, but the solution is relatively simple. Without a professional damp survey you risk carrying out major demolition work which, in hindsight, turned out to be completely unnecessary.
• Legal and financial certainty in property transactions: Whether you buys a house Whether you are buying or selling, misjudging a damp problem can lead to unpleasant disputes over hidden defects. An official, properly documented diagnosis report provides certainty, in black and white, regarding the actual condition of the property.

In short: An incorrect diagnosis of damp can lead to incorrect, ineffective treatment and a waste of money. Only a watertight diagnosis guarantees a permanent and cost-effective moisture solution.

It’s tempting to hide a damp patch for a while with a strategically placed cupboard or to mask the musty smell with a scented candle. But don’t be fooled, because moisture problems are progressive. They never stop of their own accord and do not resolve themselves. In fact, the longer you wait, the greater the damage and the more complicated and expensive the repairs will be. If you ignore damp damage, you’re setting off a ticking time bomb that will take a heavy toll on every aspect of your life and your home.

1. The direct threat to your health and wellbeing

A damp home is an unhealthy home. When relative humidity If the humidity is consistently too high, you create the perfect microclimate for mould, fungi and dust mites.

• Respiratory problems and allergies: You and your family breathe in the invisible spores that mould releases into the air every day. This leads to chronic coughing fits, breathing difficulties, worsening asthma and persistent allergic reactions.
• Weakened immune system: Living in a damp environment triggers constant, mild inflammatory responses in the body. Babies, young children, the elderly and people with weakened immune systems are particularly at risk of serious health problems as a result.
• Rheumatic symptoms: A cold, damp environment also exacerbates the symptoms of osteoarthritis, arthritis and other rheumatic conditions.

2. Aesthetic and physical damage to your home’s interior

Damp spares nothing and no one. As soon as it penetrates your living spaces, the visual and physical deterioration of your carefully furnished home begins.

• Peeling wallpaper and flaking paint: These are often the first signs. Adhesive dissolves and paint cracks because the substrate is saturated with water.
• Rotten and warped timber: Wooden floors, skirting boards, interior doors and furniture absorb moisture, causing them to warp, expand or simply rot beyond repair.
• Damaged textiles: Curtains, clothes in wardrobes and fabric sofas kept in damp rooms will start to smell musty and may develop black mould stains that will never come out.

3. Structural deterioration of the building

This is where it gets really dangerous. Moisture doesn’t just remain on the surface; it penetrates deep into the core of the building materials.

• Crumbling plaster and brickwork: Quick-drying salts carried along by the moisture crystallise on the surface and literally push the plaster off the wall. The wall crumbles.
• House fungus (Serpula lacrymans): Every homeowner’s absolute nightmare. This aggressive wood-rotting fungus thrives in damp, dark spaces and, in no time at all, eats away at entire wooden joists and floor structures, posing a risk of collapse.
• Rusting reinforcing bars: In concrete structures, moisture penetrating the concrete can cause the internal reinforcing steel to rust. This steel expands, causing the concrete to crack and split.

4. A soaring energy bill

Did you know that damp walls your energy bill cause a dramatic rise in temperature? Water has an extremely high heat capacity.

• Loss of insulation performance: A damp wall loses all its insulating properties. The cold from outside seeps straight in.
• Burning more fuel for the same level of comfort: To heat a damp room, your boiler has to work much harder. You are literally heating water rather than air. This can lead to an increase in your energy bills of as much as 15% to 20%.

5. Drastic fall in value and legal risks associated with the sale

Moisture is the number one reason why prospective buyers to walk out immediately during a viewing.

• Financial loss: A property with visible or concealed damp damage will see its sale price plummet. Buyers will always use this as a reason to haggle tens of thousands of euros off the asking price.
• The Hidden Flaw: Are you trying to quickly conceal the damp damage with a new plasterboard panel or a fresh coat of paint just before the sale? If the buyer discovers the damp problem after the transfer of ownership, this may be legally classified as a hidden defect. The consequences include protracted legal proceedings, forced price reductions after the fact, or the complete cancellation of the sale.

In short: So waiting is not an option. By choosing today to an accurate, scientific diagnosis of damp, You protect your health, safeguard your capital and prevent a manageable damp problem from turning into a financial disaster.

When you set out to find the answers yourself, you’ll probably ask yourself: “How can I moisture problems ”How do you detect it?" The internet is full of quick fixes, and you can buy a simple damp meter online for just a few euros. You push the probes into the wall, the device beeps and the screen turns red. But what does that actually tell you?

Actually, very little. A moisture meter measures only the electrical resistance or conductivity at the very surface of the wall. As water conducts electricity, the device simply detects that this area is conductive and therefore concludes that moisture is present. It detects a symptom, but it does not carry out an analysis.

What a moisture meter doesn’t measure, and what is crucial

In order to reach an accurate diagnosis of damp and the correct moisture solution To get there, you need answers to questions that a moisture meter cannot answer.

• The exact extent of the problem: A moisture meter takes a superficial reading. It doesn’t tell you whether the wall is thoroughly wet or whether it’s just a wafer-thin layer of condensation on the outside of the plaster.
• The presence of hygroscopic salts: This is perhaps the device’s biggest blind spot. When groundwater or rainwater seeps into a wall, it carries salts with it. As the water evaporates, these salts are left behind in the wall. These salts are hygroscopic, which means they continuously draw moisture from the surrounding air. As a result, a moisture meter will trigger an alarm and indicate ‘wet’ due to the salts, even if the original source of moisture was sealed off months ago.
• The chemical composition of the water: Is the water in your wall caused by rain, rising groundwater, or is it hard tap water from a burst pipe? A moisture meter cannot tell the difference, yet this distinction is key to identifying the cause.
• The impact of humidity and temperature: Damp problems never occur in isolation; they interact with the indoor climate. A damp meter does not take into account relative humidity in space or the dew point, the temperature at which water vapour in the air turns into liquid water. Without this data, it is impossible to demonstrate the difference between condensation moisture and penetrating moisture.

Relying solely on a moisture meter is like a doctor taking your temperature, determining that you have a fever, and immediately deciding to operate without knowing where the infection is. In this case, measuring is far from knowing. To identify the actual source of the fluid, a more in-depth and scientific fluid analysis is required.

To the moisture problem To tackle the problem effectively, you naturally need to know what you’re dealing with first. Damp in the home never occurs without a cause and manifests itself in various ways. At AquaConsult, we identify seven specific damp problems, each of which poses its own risks to both your home and your health.

The short answer is, of course, “yes”. Moisture is harmful in every way. Before we look in more detail at what moisture does to your body, it is also important to understand the general consequences of an untreated damp problem in your home.

Property damage and a high energy bill are a pain, but you can sort them out with money. Your health and that of your family, on the other hand, are priceless. So you need to a permanent solution Choose a solution to your damp problem. Preferably today.

Biologically speaking, humans are not designed to live in a damp environment contaminated with mould spores. When the humidity in your home is consistently too high, you unknowingly inhale microscopic mould particles and dust mite droppings every second. Your body reacts to this with a series of physical warning signs.

So, what specific health issues can be linked to damp problems in your home?

• Chronic respiratory problems: Mould spores penetrate deep into your airways and alveoli. This leads to a persistent tickly cough, wheezing or rattling breath, shortness of breath and a blocked nose. It feels as though you’re stuck in a never-ending cold.
• Extreme fatigue and difficulty concentrating: In a humid room, your body finds it much harder to release heat through perspiration. This disrupts your natural temperature regulation whilst you sleep. You sleep restlessly, wake up more often and start the day feeling tired.
• Persistent headaches: Poor air quality and the constant presence of harmful substances in the air cause many people to suffer from chronic headaches that do not seem to go away with painkillers.
• Skin irritations and allergic reactions: Exposure to damp and mould damages your skin’s natural barrier. Existing skin conditions such as eczema or psoriasis can suddenly flare up again. You may also experience unexplained red patches, hives and intense itching.
• Irritated mucous membranes: The allergens in a damp home can irritate not only your lungs, but also your eyes and throat. This can result in burning, watery or red eyes, a dry throat and constant sneezing fits.
• Increased joint and muscle pain: Damp and cold air penetrate deep into your body. People with rheumatic conditions, osteoarthritis or fibromyalgia experience symptoms much more quickly in a damp home, as they become stiff more easily. Their daily pain and symptoms also become more intense.

What effect does a damp home actually have on your body?

A damp house is like a constant battle of attrition for your immune system. Because you are surrounded by harmful mould spores and allergens, your body’s natural defences are on high alert 24 hours a day. Your immune system becomes chronically overworked by the constant battle against these invisible invaders. This causes your resistance to drop drastically, making you more susceptible to infections and viruses. What’s more, damp air forces your lungs and heart to work harder to take in enough oxygen. Damp in the home therefore literally drains your body from the inside out, affects your energy levels and, in the long term, lays the groundwork for chronic, irreversible damage to your health.

At-risk groups: Why swift action is vital

Although a damp indoor environment is unhealthy for everyone, certain groups are particularly vulnerable. For them, an untreated damp problem not just annoying, but downright dangerous.

• Babies and children: Children’s lungs and immune systems are still developing. Children who grow up in a damp home with mould are up to three times more likely to develop chronic asthma, bronchitis and severe allergies later in life. A damp home therefore lays the foundations for a lifelong respiratory condition.
• Older people and those with chronic illnesses: Older people often have a naturally lower immune system. People who already suffer from lung conditions such as COPD experience breathing difficulties on a daily basis in a damp home. Furthermore, recovery from flu or a cold takes twice as long in a damp environment.
• Pets: We often forget, but our dogs and cats also suffer in a damp home. Because they spend more time on the floor and are therefore closer to rising damp or mould As they are exposed to these conditions, they inhale even more harmful substances than we do. This manifests itself in listlessness, bald patches in their coat caused by extreme itching, and chronic coughing fits.

Don’t wait until it’s too late: protecting your loved ones calls for action

Living in a damp home is a ticking time bomb for your health and that of your loved ones. This is therefore the moment when waiting it out is no longer an option, but becomes an unacceptable risk. Moisture problems These issues never resolve themselves; they only get worse by the day, and the impact on vulnerable groups grows. As a parent, partner or landlord, the key to a healthy future lies in your hands. Taking timely action is not a matter of aesthetics or property maintenance, but the ultimate act of protecting your tenants or family members. By taking action now and to tackle the root cause of the damp problem once and for all, you are choosing the health, safety and well-being of your whole family.

Before we dive into the numbers, we need to know what moisture enemy we are dealing with in your home. Moisture in the home comes in different forms. Recognising the specific moisture problem is therefore the first step towards the right solution.

Rising damp

Rising damp is one of the most persistent and structural moisture problems in older houses that do not yet have a good, watertight waterproofing layer. Groundwater then soaks up into the porous bricks.

You can recognise it by the moisture spots, salt efflorescence, loose plaster or flaking paint and wallpaper. And that mainly on the underside of the interior or exterior walls, approximately up to 1.20 metres in height.

Damp walls

When the walls feel constantly clammy, we speak of damp walls. This may be due to rising or penetrating moisture, but at least it causes the indoor environment to become unhealthy and the energy bill into the air. After all, dry walls insulate much better.

You will recognise it because the walls feel cold and clammy when you touch them. Stains or circles also appear on the paintwork and you notice that the humidity in the room remains high. In addition, you smell a typical musty odour as soon as you walk into the room.

Penetrating moisture

When your exterior walls are damaged, cracked or porous due to age, driving rain can penetrate deep into the facade. This is when we talk about penetrating moisture. The moisture then makes its way inside.

You recognise it by the moisture spots that are located at random heights on the interior walls. Often on the side where the wind and rain hit the façade the hardest.

A damp cellar

The basement is the lowest point of your home and is constantly under pressure from the surrounding groundwater. Especially during heavy rainfall, the hydrostatic pressure can become so great that water is forced through the basement walls or the bilge seam. Then you suffer from a damp cellar.

You will recognise it by puddles of water on the basement floor, permanently damp or shiny basement walls and a musty smell that permeates the rest of your home.

Condensation moisture

Condensation moisture unlike other moisture problems, is not due to water penetrating from outside, but purely to the lack of correct ventilation in the home. Daily activities such as cooking, showering, washing and breathing produce litres of moisture every day. If this warm, moist air has nowhere to go, it settles on cold surfaces and we speak of condensation moisture.

You will recognise it by the drops on the inside of the windows, musty smells and windows that remain tarnished for a long time after showering or cooking.

Mould on the walls

The direct and dangerous consequence of long-term condensation moisture or other untreated moisture problems is mould on the walls.

You will recognise it by the persistent, unsightly black mould spots and dots in the corners of ceilings, behind cupboards or in the bathroom and bedroom. This is not only detrimental to the value of your home, but also to your health.

Moisture in new-build homes

People often think that moisture only occurs in older houses, but nothing could be further from the truth. In the construction of modern homes, thousands of litres of water are used, just think of the concrete, screed and plaster. If a new-build home is sealed and insulated too quickly without building moisture can dry out completely, then the moisture remains in the structure.

You will recognise it by consistently high humidity in the new home, condensation on the windows and, in the worst case, immediate mould on the new plaster.

Many owners looking to sell their property ask us the question: “Can I selling my house with a moisture problem?” The short answer is: Yes, you are legally allowed to do so. However, you are obliged to explicitly disclose this to potential buyers, as moisture damage falls under the duty to report defects. Do you fail to do so? Then you risk legal proceedings afterwards for hidden defects.

So the conclusion is very simple: do nothing about the moisture problem is not an option. Hiding the moisture problem is not allowed and leaving the problem untreated will cost you more at sale than the actual treatment price of the problem. By intervening now, you will remove buyers' doubts and protect your own wallet.

Meanwhile, we have the moisture problem recognised and understand its risk to your loss of value. Now it's time for the solution. Once you detect the moisture problem, you can take proactive action to stop the loss of value of your home and turn it into an added value.

At AquaConsult, we don't believe in treating symptoms. We tackle the source of the moisture problem. Depending on the exact diagnosis made by our experts, we put one of our targeted and professional solutions In.

1. Injecting walls

• Deployed at: Rising damp and persistent damp walls.
• The solution: Injecting walls. Our experts accurately drill holes in the affected walls just above the floor. They then inject a high-quality, environmentally friendly gel. This gel spreads into the pores of the masonry and forms an impenetrable, water-repellent barrier. From then on, the groundwater can definitively no longer climb up.

2. Remediation of plastering

• Deployed at: Walls damaged by rising damp or damp walls.
• The solution: The remediation of plastering. Only inject the walls is often not enough. Over the years, walls have absorbed salts from groundwater. These salts continue to draw moisture from the air, even if the wall has been injected. Our experts remove the old, affected plaster down to the stone and then apply a special salt-resistant membrane. Afterwards, they also provide professional re-plastering. This will make your walls perfectly even, dry and paint-ready again.

3. Basement sealing or caulking

• Deployed at: A damp cellar and basement infiltration.
• The solution: With a professional basement sealing or waterproofing our experts make the basement walls completely waterproof again. They first fix the walls mechanically and then apply various waterproof cementing layers, mortars and coatings. The vulnerable bilge seam is also made impermeable in the process. Your basement transforms from a musty storage area to a perfectly dry and usable room.

4. Basement drainage

• Deployed at: A damp cellar with extremely high groundwater pressure.
• The solution: Basement drainage. Sometimes the pressure of groundwater is so great that a traditional basement is not sufficient. In that case, we at AquaConsult opt for basement drainage. Our experts dress the basement with a special bubble membrane that collects the water seeping in in a controlled way and leads it via built-in channels to a collection pit. An automatic submersible drain then drains the water to the sewerage system. Your basement is guaranteed to stay dry and usable.

5. Concrete injection

• Deployed at: Moisture in new-build homes and basements with cracks in concrete.
• The solution: In modern homes or cast concrete basements, settlement or shrinkage can cause a crack in the concrete where water seeps through. With concrete injection we solve this locally and effectively. Under high pressure, we inject a special polyurethane resin directly into the crack. This resin reacts immediately as soon as it comes into contact with water. It foams up, expands and completely and permanently seals the crack to its deepest core.

6. Facade impregnation

• Deployed at: Penetrating moisture and porous exterior walls.
• The solution: Facade impregnation. Our experts first thoroughly clean the external wall and then apply a transparent, breathable coating to it. This impregnating agent soaks deep into the facing bricks and joints. As a result, the driving rain beads off the wall and can no longer penetrate. And that while the façade can still breathe from the inside.

7. Mechanical ventilation

• Deployed at: Condensation moisture and mould on the walls.
• The solution: The only way to banish condensation and mould for good is controlled air circulation. AquaConsult installs smart and energy-efficient ventilation systems. These systems continuously measure the humidity in the house. As soon as it gets too high, while showering or cooking, the humid air is automatically removed and replaced by healthy, dry outside air. No more condensation and therefore no more mould on the walls.