Penetrating damp

Penetrating damp is rainwater ingress from the exterior to the interior of a building, often due to defects in the building’s structure or design. This can occur through walls, roofs, or openings like windows and doors. It can lead to structural damage over time if left unaddressed, and is usually more prevalent in older buildings.

Typically penetrating damp is accompanied by damp staining on the inside wall.

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