How to Fix Wall Dampness

Damp walls are often misdiagnosed because the visible damage — peeling paint, a musty smell, or a stained patch — doesn't always point directly to the underlying cause. Identifying the type of dampness is the first step to fixing it properly.

Rising Dampness

This occurs when moisture from the ground moves upward through a wall's base, usually visible as damage concentrated near the floor level. It is more common in older buildings or where the wall lacks an effective damp-proof layer at its base.

Penetrating Dampness

This happens when water enters through an external wall surface, often due to worn plaster, cracks, or prolonged rain exposure, and is usually visible on the wall it enters from, sometimes tracking further into the room.

Condensation and Trapped Moisture

Not all wall dampness comes from an external source. Poor ventilation in enclosed rooms can lead to condensation building up on walls, which can look similar to a leak but requires a different approach, focused on ventilation rather than waterproofing alone.

How Each Type Is Treated

Rising dampness typically needs a damp-proofing treatment applied at the base of the wall. Penetrating dampness is treated by repairing any cracks and applying a waterproofing coating to the affected surface. In both cases, an inspection is the best way to confirm the actual cause before starting any repair work.

Our damp proofing and wall waterproofing services cover these treatments depending on what your inspection reveals.

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