Symptoms of rising damp
Rising damp is caused by moisture from the ground rising by capillary action through porous masonry. This phenomenon also carries hygroscopic salts from the ground. These salts are deposited within the wall surface. These have the ability to absorb atmospheric moisture.
Signs you could have rising damp are:
- Damaged skirting boards or plaster.
- Peeling paint and wallpaper, often with wet patches.
- A white, powder-like substance on the wall, left by soluble salts dissolved in the water.
- Tide marks rising up the wall.
- If the problem is coming up from the floor, you may notice floor coverings lifting up.
The most effective and economic solution to this problem is the installation of a silicone-based chemical damp proof course by low-pressure injection via holes drilled into the masonry structure.
Where plasterwork is contaminated by hygroscopic salts it must be removed and re-instated with either a salt retardant base coat or cavity membrane. This prior to the plaster finish coat is applied to provide a complete solution.
Symptoms of penetration damp
Penetrating damp is caused by water leaking through walls. It tends to happen as a result of structural problems, such as:
- Faulty guttering or roofing, or cracks in external walls.
- Leaking walls Air gaps,
- Burst gutters and pipes,
- Porous bricks Cavity wall problems,
- Poor cavity insulation.
Aqua-Dri offers a range of solutions to fix penetrating damp, these include:
- External masonry treatments,
- Internal membrane and dry lining system,
- All necessary repair works.