Many homes have only a crawl space. Just as with ordinary basements, moisture problems can naturally develop here, causing negative consequences. Are you suffering from moisture or water in your crawl space? Discover here the possible causes and why you should solve this moisture problem as soon as possible.

 

How does water get into the crawl space?

Moisture or water in the crawl space is usually caused by groundwater seeping into the crawl space through the walls or through the floor. Especially in the fall and winter, the ground becomes very moist, increasing the pressure of groundwater. If your crawl space is not sufficiently watertight, the groundwater can simply wend its way in and you obtain a layer of water in the crawl space.

But that's not all. Leaking or broken pipes can also cause water to enter your crawl space. In addition, poor or lack of ventilation amplifies moisture problems in your crawl space.

Is water in the crawl space bad?

Many basements and crawlspaces are sometimes flooded or have high humidity. This high humidity creates a large difference in vapor pressure between the crawl space and the living area. Through open connections such as shutters, meter boxes with pipe penetrations or connections between floors and walls, the moist air can enter the home. This can happen in three different ways:

  • Vapor diffusion: water vapor moves from areas of high vapor concentration to areas of lower water vapor concentration.
  • Capillary moisture transport: capillary pores are continuous, interconnected pores in, for example, cement stone with a size between approximately 10 and 1000 nm. In construction, capillary action occurs when water is sucked up by bricks (rising damp, rising damp).
  • Air transport: an air flow from the crawl space to the house can occur if the crawl space has an open connection with the outside air, if there are air leaks between the crawl space and the house or if there is a large pressure difference between the crawl space and the house.

As moisture penetrates the home, it can lead to a variety of negative consequences. Common consequences include:

  • A musty smell in the house
  • Mold
  • Pests in the home
  • Health problems, including shortness of breath, colds or (chronic) bronchitis
  • Damage to your walls or floors, to damage to the building structure

So it does matter if you are struggling with moisture or water in your crawl space. We highly recommend getting water in the crawl space thoroughly treated.

What to do if there is moisture or water in the crawl space

There is no general solution for water in the crawl space. Which moisture solution is best for you depends very much on the cause of the moisture problem. So always have an expert come by, as this person can accurately determine the cause of the water in the crawl space.

Typically, there are several options to combat moisture in the crawl space. To fix the problem permanently, it is highly recommended to hire a moisture expert. This will guarantee the best execution.

1. Ventilation

A damp crawl space must first and foremost be fitted with good ventilation grates so that condensation in the space does not have a chance.

Air leaks between the crawl space and the home must also be sealed when moisture problems arise. These air leaks exist because of several reasons:

  • Piping from the basement to the house
  • Crawl space shutters or cellar shutters
  • The capillary action of the house floor itself

Pressure differences between the basement area and the house must then be addressed. Vapor pressure differences can occur due to three factors: the "chimney effect" in winter (due to the temperature difference between indoors and outdoors), a mechanical exhaust system that is not properly adjusted, or wind pressure that creates depressions and upper pressures.

The basis is always: air flowing in through the underpressure must somehow be able to flow back out again. If the differential pressure cannot recover naturally, it must be balanced manually with the installation of, for example, a ventilation system.

2. Basement drainage

Is there significant groundwater pressure or significant amounts of water entering the crawl space? If so, you may want to consider draining the groundwater through basement drainage. This involves pumping the water out of the crawl space.

basement drainage

3. Basements

You can also choose to make your crawl space completely waterproof by means of a basement waterproofing. This gives the walls and floor of the crawl space a waterproof layer, this in several stages.

basement waterproofing

Are you suffering from moisture or water in your crawl space? Then contact Aquaconsult and our specialists will come by for a free moisture assessment, anywhere in Flanders.

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