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Damp proofing is a process or treatment applied to building materials or structures to prevent moisture ingress and the associated problems such as mould growth, structural damage, and deterioration of interior finishes. It’s essential for maintaining structural integrity and ensuring a healthy indoor environment.
Dampness in buildings can result from various sources, including rising damp from groundwater, penetrating damp from leaks or water ingress, condensation from inadequate ventilation, and capillary action from moisture absorption by porous materials.
Signs of dampness in buildings include damp patches or stains on walls or ceilings, peeling paint or wallpaper, musty odours, mould or mildew growth, rotting wood or decayed plaster, and a feeling of dampness or clamminess in the air.
Common damp proofing products and treatments include damp proof courses (DPCs), which are horizontal barriers installed in walls to prevent rising damp, damp proof membranes (DPMs), which are moisture-resistant membranes installed beneath concrete slabs or floors, and damp proof paints or coatings applied to surfaces to repel moisture.
The application of damp proofing products depends on the complexity of the project and the expertise required. Some products, such as damp proof paints or coatings, may be suitable for DIY application, while others, such as damp proof courses or membranes, may require professional installation for optimal results.
