All You Need to Know About Penetrating Damp

There are different ways that damp can access a property: Rising Damp, Penetrating Dampness, or Condensation. Here we will explore the problem of penetrating damp, and how you can identify and treat it in your home.

Penetrating Damp FAQs

What is Penetrating Damp?

Penetrating dampness occurs generally as a result of poor external maintenance, i.e. defective rain water goods (gutters), which will allow rain water to penetrate the structure of the building. This can happen when the external renders are cracked, because of spalled brickwork, or even due to roof defects.

Signs of Penetrating Dampness
  • Wallpaper peeling off, plaster falling off walls, ‘blown’ plaster.
  • Internal plaster stained.
Causes of Penetrating Damp
  • Flower beds, lawns, paths, patios and driveways being raised above the
    installed damp proof course against the external wall.
  • Defective Rain water goods such as guttering that allow water to
    penetrate the walls.
  • Faults in the brickwork or masonry such as missing or cracked pointing.
  • Porous bricks or stones.
  • Roof defects such as faulty flashing, cracked or missing slates or tiles.
  • Missing or defective mastic around windows and doors allowing moisture
    to penetrate.
Recommended Reading

Property Care Association

Take a look at the following page for a wealth of information –

Mr Graham R Coleman B.Sc (Hons)., M.I.Biol., C.Biol., A.I.W.Sc., F.Inst.S.S.E.

You’ll find facts about chemical damp proof courses and re-plastering by the industries leading expert who has written many technical publications and articles. Take a look at his website –

Find Your Answer from our Surveyor

If you have any questions about penetrating damp, get in touch, we’re here to help!

Penetrating Damp Examples

How We Help

Dean Webster, company director and CSRT surveyor, visits each property to inspect the areas of concern. You are provided with a detailed report on all findings, treatments available, and a breakdown of costs should any remedial works be required. If you feel you may have penetrating damp, you can arrange a survey here.

If you suspect you might have a problem with penetrating damp and want some advice, please get in touch, our specialist team are here to help.