Damp occurs when there is excess unwanted moisture in the air that has no way of escaping. Excess moisture can be caused by steam when cooking, drying clothes inside the home and perspiration caused through showering and bathing.

How do you find the source of dampness?

Dry the wall surface with a fan heater, then tape some kitchen foil tightly over the damp area. If the surface of the foil is wet after 24 hours, you have condensation. If the foil is dry but the wall surface beneath it is damp, you have rising or penetrating damp.

What is the main cause of dampness?

Structural dampness is the presence of unwanted moisture in the structure of a building, either the result of intrusion from outside or condensation from within the structure. A high proportion of damp problems in buildings are caused by ambient climate dependent factors of condensation and rain penetration.