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Damp-proof course (DPC)
Used in two senses. A damp-proof course installed during construction is usually a layer of slate, concrete, or bitumen low down on a wall, to prevent ground water rising above that level. The damp-proof course should be about six inches (125mm) above ground level, as over time the earth round a building can build up, 'bridging' over the course and allowing moisture to reach the interior of the building. In the other sense, an impervious layer of plastic or lead can be inserted at a wallhead, or below a cope, to stop water penetrating from above.
Related Words
Bitumen, bituminous; Concrete; Course, coursed; Lead; Slates ; Wallhead
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