Penetrating Damp
What Is Penetrating Damp?
Penetrating damp is water that gets in from outside through a defect in the building fabric — and unlike condensation, it follows the weather.
Updated 14 October 2026 · 2 min read
Penetrating Damp
Penetrating damp is water getting in from outside through a defect — a leaking gutter, cracked render, failed pointing, a roof problem or a blocked cavity. Unlike condensation it is usually localised and often worse after rain. Fixing the external defect is almost always cheaper and more effective than internal treatment alone.
Penetrating Damp
Penetrating Damp Treatment
Treating penetrating damp is mostly about one thing — fixing the external defect that lets water in. Internal work comes afterwards, once the wall can dry.
Updated 6 October 2026 · 2 min read
Penetrating Damp
What Causes Penetrating Damp?
From blocked gutters to worn pointing and leaking chimneys, here are the external defects that let penetrating damp into UK homes.
Updated 2 October 2026 · 3 min read
Penetrating Damp
Signs of Penetrating Damp
The signs of penetrating damp — localised patches, weather-driven staining and damp that can strike at any height — and how to separate it from other causes.
Updated 25 September 2026 · 2 min read