damp-proofing

Damp proofing in construction is a protective measure applied to the exterior of building foundation walls.Rising damp can arise for various reasons - the failure of an existing damp proof course (dpc), bridging due to the raising of external ground or internal floor levels, or in older buildings, the complete absence of a damp proof course.Brick, stone and mortar are porous allowing damp from the ground to rise by capillary action, carrying with it ground salts including chlorides and nitrates.
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