Damp Stain

A damp stain is a visible discolouration on a surface, typically brown, often found on walls or ceilings, caused by moisture. Stains are a common indicator of moisture passing through brick walls or wood. Often, stains are dry, old, and need no further investigation.

A light stain tends to be caused by the pigmentation in brick, and therefore is most often associated with penetrating damp from defective rainwater goods. However, the stain could be caused by a leak or condensation.

Dark stains tend to indicate contact with timber and if left damp for a long time, the water that has caused the stain could lead to timber rot. These stains are most commonly caused by leaking mains water, heating systems, or waste water, but could also be caused by defective rainwater goods or condensation.

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