Integral damp proofing in concrete involves adding materials to the concrete mix to make the concrete itself impermeable. ![]() A common example is polyethylene sheeting laid under a concrete slab to prevent the concrete from gaining moisture through capillary action. A damp-proof membrane (DPM) is a membrane material applied to prevent moisture transmission.A DPC layer is usually laid below all masonry walls, regardless if the wall is a load bearing wall or a partition wall. The damp proof course may be horizontal or vertical. ![]() Rising damp is the effect of water rising from the ground into property.
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