Damp conditions in walls can be caused by chronic condensation problems and as a result of saturation and gravity particularly badly at the foot of the wall thus masking and exacerbating a rising damp problem. There are many methods or treatments used to protect the house from dampness. The following methods help to eradicate the dampness in an existing building.

• Damp Proof Course: Install a proper Damp Proof Course (DPC), a continuous layer of damp proofing material, by removing a line of bricks close to floor level followed by insertion of the plastic sheet along the same line of bricks by replacing the old mortar with waterproof mortar.
• Leak Proof: Make sure that rainwater does not penetrate through the joints of the structure. If there is attic space between the ceiling and the roof, then you definitely need to have attic ventilation. Removing ventilation to increase the heat in the attic is a bad idea. Fit the joints of the rainwater pipes tightly and properly to avoid leakages in the joints. Let all the sanitary and the water supply fittings be tight and leak proof.
• Well ventilation: If you have steam from the bathroom shower or from the kitchen, and if that steam isn’t vented to the outside, then you’re going to have wet walls. That would normally be on walls that are fairly close to the bathroom or kitchen. It may be that the moisture on the walls is more pronounced outside the bathroom or kitchen. Moisture and mold may develop more easily on flat latex paint, compared to the paint in the bathroom and kitchen.
• Re-plaster affected area: Re-plaster the affected area with a waterproof plaster or cement mixture. Place the “Delivery Tubes” of specific designs into the holes of the bricks and transfuse the liquid into the wall under the influence of gravity. Lay the waterproofing membrane, on the top of the surface of the existing floor, which acts as a barrier against dampness.