Materials or techniques used to prevent water and moisture from entering or damaging a building's walls, foundation, or basement.
A compound word combining 'damp' (moisture) and 'proofing' (making resistant to), with 'proof' having roots in Latin 'probare' meaning 'to test.' This technical term emerged in the 20th century as building construction became more scientific.
Without dampproofing, most old buildings would crumble within decades because water is one of the most destructive forces in nature—it freezes, expands, and literally tears stone apart from the inside, which is why ancient civilizations used lime mortar that could flex and 'breathe.'
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