A Damp Proof Course (DPC) typically looks like a thin, visible line of waterproof material inserted into the brickwork of a building, near ground level. It resembles a fine sheet of material sandwiched between courses of bricks or blocks.
Here's a breakdown:
- Material: DPCs are commonly made from materials such as:
- Lead-lined bitumen
- Slate
- Plastic (polyethylene is common)
- Appearance: Regardless of the material, a DPC often appears as a dark, thin line running horizontally along the wall.
- Location: You'll usually find it close to the ground, typically 150mm (6 inches) above ground level, but always above the external ground level to prevent rising damp.
- Function: It acts as a barrier to prevent moisture from rising up through the walls via capillary action.
- Alternative Term: Sometimes, a DPC is also referred to as a damp proof membrane, especially when it's a sheet-like material.
Example: Imagine a brick wall. If you look closely near the base, you might see a black plastic strip running continuously between two courses of bricks. This is a likely a DPC.
In summary, a DPC presents as a thin, often dark-colored, continuous line of waterproof material visible in the mortar joints of a wall near ground level.
