Damp Proofing

Overview

• A DPC is a horizontal barrier typically installed in the walls at ground level to prevent rising damp. It can be made of materials like bitumen felt, polyethylene, or proprietary damp-proofing membranes. 
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• A DPM is a plastic sheet or membrane that is placed beneath the concrete floor slab to prevent moisture penetration. It acts as a barrier against ground moisture and helps to prevent rising damp. 

• Tanking involves applying a waterproof coating or membrane to below-ground walls or foundations. It forms a barrier against moisture and can be used in basements or below-grade areas to prevent water penetration. 

• This method involves creating a cavity or void between an internal and external wall, which allows any moisture that penetrates the external wall to drain away through a network of drainage channels and sump pumps.

• Various surface treatments can be applied to walls to provide additional damp-proofing. These treatments can include waterproof coatings, paints, or sealants that create a barrier against moisture. 

• This method involves applying a waterproofing membrane or coating to the external walls of the building. It helps to prevent water ingress from rain, groundwater, or surface water sources. 

• Proper ventilation and air circulation are essential to prevent condensation and dampness. This can be achieved through the installation of ventilation systems, such as mechanical extractors, passive vents, or trickle vents. 

• Following good construction practices, such as proper detailing, adequate roof overhangs, appropriate drainage systems, and effective site grading, can help prevent moisture issues and dampness in the building. It's important to note that the specific damp-proofing methods employed may vary depending on the building design, site conditions, and local regulations.