Photo of Penetrating Dampness
Penetrating dampness is defined as the entry of water into the masonry and external fabric of a building.
Symptoms will usually only occur during wet weather. A watermark might appear, and grow if the water continues to enter. If not fixed, plaster may start to perish. Penetrating damp can sometimes be caused by gutter or roof problems which have allowed rainwater to spill onto and saturate areas of wall.
Penetrating damp is most frequent in older homes, which have solid walls. A new build property with cavity walls offers more protection and is unlikely to suffer from this type of defect, unless there cavities have been blocked. Penetrating damp can be tricky to pin-point, and often may require expert help. Installing cavity insulation to exposed walls is becoming a more common problem.
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Key factors contributing to Portsmouth’s damp problem: