The importance of a water barrier in the wall in case of rising damp

Do you also suffer from rising damp in the walls? Then there is a good chance you have problems with the water barrier. Find out how best to deal with this.

What is a water barrier in your wall?

A water barrier is a layer of damp-proofing material, usually integrated into the construction of the wall. It is designed to prevent the passage of water through the wall. It is usually placed on the first row of bricks, flush with the floor pass, to ensure that moisture cannot enter the house through, for example, the basement walls. In this way, it is therefore a kind of weapon against moisture problems, preventing damage to the structure or interior of a building.

The importance of a water barrier in your wall

It is important that this layer is intact along the entire length of the walls. If it is not, or the water barrier is completely missing, it loses its function. Then:

  • Will the water spread into the wall, causing you to suffer from rising damp.
  • The salts contained in that water will crystallise, resulting in white spots.
  • Moss may also start to form.

The infestation goes across the entire width of the wall and can go over a long length.

Rising damp

Fixing problems with the water barrier in the wall

Do you experience rising damp due to a problem with the water barrier? If so, there are several methods available to address these flood defence problems, depending on the situation. We briefly list them below.

Note: if you moisture in the walls does not automatically mean it is rising damp. It is always advisable to seek the help of an expert. An expert can determine the exact cause of the moisture problem and assess whether it is actually rising damp. Based on this analysis, he or she can then make specific recommendations for the right control method. You can get a free moisture analysis applications.

No water barrier is present

When you are dealing with rising damp, the first question you should ask yourself is whether there is a water barrier in your walls. Houses built before the 1980s, for example, often do not have a built-in water barrier. If the walls of your house lack a water barrier, it is best to have a water barrier installed. This can be done in two ways.

  • The first is to undercut the wall. This involves cutting into the wall a few centimetres above the floor and inserting a moisture barrier into the cut. To avoid compromising the stability of your house, this has to be done very carefully, metre by metre. It is a time-consuming, labour-intensive and expensive job.
  • A second option is to inject a damp-proofing agent into the wall. The damp-proofing gel is often silicone-based. Once it has cured properly, groundwater will no longer be able to pass through the wall. For this, AquaConsult uses REWAGEL Inject 3A+; moisture-resistant gel of the highest qualification you can find.

The existing water barrier is not doing its job

If a water barrier is already in place, the reasons why it is not functioning properly should be investigated.

  • Usually, these are situations where the waterproofing layer has been damaged or misplaced. Then wall injection is also an effective and durable solution here.
  • Sometimes the plaster extends below the water barrier, requiring it to be removed and replaced with a water-repellent ("hydrophobic") product.
  • In other cases, the ground level outside the house may have risen over the years, making the water barrier too low and allowing water to seep into the walls anyway. In that case, it is necessary to apply the waterproofing layer at a higher level.

Put an end to your moisture problems

Do you have a moisture problem, and suspect it could be rising damp? Our field engineers are true experts when it comes to rising damp. Contact AquaConsult now for a no-obligation free expertise.

Free expertise

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