Peter Cox

Raising Standards in Property Preservation

Call us FREE on

0800 030 4701

Book a free survey now!

Old damp proofing not working

There is evidence that my property was damp proofed sometime in the past because you can see injection holes. But I still have areas of dampness inside at the foot of the walls. Can you explain this ?

There could be a number of reasons for continuing dampness - failure of the injected dpc, continuing bridging of the dpc eg because a plinth render has not been removed or part of the wall inside being below ground level and requiring the application of a waterproofing slurry coating. However the most common fault is in the replastering either because a lightweight plaster has been used instead of a sand and cement render with salt retardant additive or secondly where the new plaster has not been stopped short of the floor and so is bridging the new dpc

Related Questions