Damp Proofing Techniques

Damp Proof Course (DPC):

​A physical barrier typically installed during construction to prevent rising damp from ascending through walls. DPCs are commonly made of materials such as bitumen felt, plastic, or slate.​

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Integral Damp Proofing:

Integral damp proofing involves incorporating water-repellent additives into the concrete mix during construction. These additives react with moisture to form a crystalline structure within the concrete, blocking the passage of water.

Surface Tanking:

Surface tanking is the application of a waterproof membrane or coating to the interior surface of below-ground walls or floors. This technique creates a barrier that prevents moisture penetration, commonly used in basements or below-ground structures.

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Injection Damp Proofing:

Injection damp proofing involves the injection of a chemical damp-proofing fluid or cream into the mortar joints or masonry of existing walls. The injected material forms a barrier against moisture, effectively preventing rising damp.

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External Tanking:

External tanking involves applying a waterproof membrane or coating to the external surface of below-ground walls or foundations. This technique prevents groundwater from seeping into the structure, effectively waterproofing the below-ground areas.

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Cavity Drain Membrane Systems:

Cavity drain membrane systems consist of a network of dimpled plastic membranes installed against the interior surface of walls or floors. These membranes create an air gap that allows moisture to drain away to a sump or drainage channel, keeping the internal space dry

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Waterproof Renders and Plasters:

Waterproof renders and plasters are applied to the interior or exterior surfaces of walls to provide a waterproof barrier. These cementitious or polymer-based coatings effectively seal porous surfaces and prevent water ingress.

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External Waterproofing:

External waterproofing involves applying waterproof membranes or coatings to the exterior surface of below-ground walls or foundations. This technique prevents groundwater from penetrating the structure, protecting it from dampness and water damage

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Grouting and Repointing:

Grouting and repointing involve filling in gaps or cracks in masonry joints with a waterproof mortar or grout. This helps to seal the building envelope and prevent moisture ingress through mortar joints, effectively damp proofing the structure.