A DPC is a barrier (usually a plastic sheet, bitumen layer, or special waterproof material) placed between the foundation and the wall to stop moisture from rising upward.
The Importance of a Damp-Proof Course in Preventing Rising Damp
Many homeowners in The Gambia notice dampness and black mould creeping up the lower parts of their walls. This common issue, known as rising damp, is often the result of skipping one vital step in construction: installing a damp-proof course (DPC).
What Is a Damp-Proof Course?
Why It Matters
- Blocks are porous: Cement blocks act like sponges, pulling water upward from the ground.
- No barrier = rising damp: Without a DPC, water travels up, bringing salts that damage plaster and paint.
- Health risks: Damp walls encourage mould growth, which can trigger breathing issues.
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Practical Tips
• Never skip it: Insist that builders install a DPC layer about 150mm (6 inches) above ground level. • Inspect existing homes: If damp is visible, retrofitting a DPC or applying damp-proof coatings can help. • Keep ground clear: Avoid raising soil or paving above the DPC level.
A damp-proof course may seem like a small detail, but it makes a big difference in keeping homes dry, healthy, and long-lasting. Skipping it almost guarantees damp problems down the line.