What is a Damp-Proof Course (DPC)?

A damp-proof course (DPC) is a barrier designed to prevent moisture from rising up through a a wall. It is usually made of a non-porous material such as plastic or bitumen, and is installed as part of the construction process. The DPC acts as a barrier to prevent moisture from rising up within the structure, and can be used in both new and existing buildings to help protect against the effects of damp.


How do I know I need a new damp-proof course

You may need a new damp-proof course if you notice damp patches on your walls, floors, or ceilings, or if you notice a musty smell in your home.


Why replace damp-proof course

Replacing a damp-proof course (DPC) is important for protecting a building from moisture and damp problems. A DPC is a barrier that is installed in walls, foundations to prevent moisture from rising up from the ground into the building. Over time, DPCs can become damaged due to age or wear and tear, which can allow moisture to enter the building and cause issues with damp, mould and structural damage. Replacing the DPC is the best way to protect the building from these problems and ensure the structure remains safe and dry.


What we do when we replace damp-proof course

First, we need to remove the old damp-proof course. To do this, we remove the mortar by grinding between the bricks. Then expose the original DPC by removing the lowest course of brickwork. This is done in stages to ensure the wall is safe and wont collapse. Once we’ve removed the old damp-proof course, we’ll install a new one. We start by making sure the area is clean and clear of debris, as this can act as a bridge for water to travel through. Next, measure the area and cut the new damp-proof course to the correct length. We use a damp-proof course that is suitable for the conditions. Once the course is ready, we lay it and seal it by reinstalling the bricks. Finally, check the damp-proof course to make sure it is securely in place.


If you’re not sure if you need a new damp-proof course, it’s best to contact us, we can check for signs of damp and advise you on what to do.

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