We primarily use DPC (Damp Proof Course) in the construction of buildings to prevent rising damp.
Here's a breakdown of where and how DPC is implemented:
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Base of Walls During Construction: The most common and effective use of DPC is its installation at the base of a building's walls during initial construction. It acts as a horizontal barrier, preventing ground moisture from being drawn up through the walls via capillary action.
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Materials: DPC is typically a waterproof membrane made from materials like plastic, slate, or bitumen felt. These materials are impermeable, blocking the upward movement of water.
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Purpose: The primary purpose of DPC is to protect the building's structure and interior from the damaging effects of rising damp. Rising damp can lead to:
- Structural damage to walls and floors
- Deterioration of plaster and paint
- Growth of mold and mildew, impacting indoor air quality
- Damage to internal finishes and furniture
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Placement: DPC is usually placed at least 150mm (6 inches) above ground level to prevent bridging by external elements like garden soil or paving.
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Examples:
- Residential Buildings: DPC is essential in houses, apartments, and other residential buildings to maintain a dry and healthy living environment.
- Commercial Buildings: DPC is crucial in commercial properties to protect stock, equipment, and the building's structure.
- Retaining Walls: While the mechanism is different, DPC principles can be applied to retaining walls to prevent moisture ingress from the soil it's retaining.
In essence, DPC is a critical component in building construction, primarily utilized at the base of walls to prevent rising damp and protect the building from moisture-related damage.
