Penetrating damp is the name given to moisture seeping into a building through external walls, roofs or window reveals; one of the most common forms of dampness in a property. The peeling and blistering of decorations, mould growth on walls, flaking plaster, growing watermarks and localised dampness are all indicators of penetrating damp. Left untreated, penetrating damp can lead to heat loss, damage to internal plaster work and interior decorations.
Causes of Penetrating Damp
The causes of penetrating damp are wide and varied:
- Defective pointing.
- Leaking pipes.
- Leaking or overflowing gutters.
- Roofing defects I.e defective flashing and broken or missing slates or tiles.
- Cracked render.
- Porous masonry.
- Faulty plumbing.
- Defective mastic around windows and doors.
- Driving rain against a particular wall.
Penetrating Damp Treatment
There is no single solution for penetrating damp and often the best course of action is traditional repair, for example re-pointing or replacing guttering.