What causes penetrating damp?

Penetrating damp is most typically caused by building defects that allow water ingress. The problem can become worse during periods of heavy rain and cause patches of damp on internal walls to increase in size. Building maintenance, therefore, is important to ensure that leaky pipes are fixed or damaged brickwork repaired so there is less risk of penetrating damp occurring.

Some common building defects to look out for include:

  • Leaky gutters and/or downpipes
  • Faulty roofing
  • Defective plumbing
  • Cracks or fractures in masonry
  • Crumbling or damaged brickwork
  • Porous bricks
  • Defective brickwork pointing
  • Drip grooves not adequate under sills
  • Defective door and window seals.
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If you can see symptoms of penetrating damp, e.g water damage to external and/or internal walls then you’ll know that moisture has permeated the property by one of these methods. The best way to treat penetrating damp in this case to contact damp proofing experts (d.p.e) who can advise you on the right course of treatment.


If you suspect you have some kind of damp problem, but aren’t sure how to fix it, then call TDT Preservation. Established in 1967 we’re professional damp specialists who can be relied on to identify the problem and provide damp solutions where necessary for your property. Our damp proofing experts (d.p.e) operate in Somerset and throughout the South West treating residential as well as commercial, public and national trust properties. Jump online and Book a Survey today or call us on 01761 416 728.

CALL TDT PRESERVATION – 01761 416 728 


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