Ask a tradesman

Damp Proofing

Small patch of damp on interior wall

We moved into our house about a year ago and had some building work done, including removing some wooden slats from the living room wall. When these were removed we discovered a round bump in the plaster just above waist-height, on an interior party wall. The builders thought this looked like a historic issue rather than ongoing and knocked into the bump, removed the damaged plaster and applied dampproof render. They then re-plastered the wall.
We've recently noticed a very faint round water mark in roughly the same spot. It's been a year and over that time we've had a lot of rain. Obviously we are reluctant to do any work that involves breaking into the newly plastered wall, but are concerned that this stain is an indicator of a larger problem. The wall is adjacent to the exterior wall and if there is a damp issue it looks likely that this is caused by run-off from our garden wall.
I'd like to know your opinions on what I've described and what the best cause of action is. I really don't want to embark on costly and disruptive damp proofing if there's a simpler solution!
Many thanks in advance.

1 Answer from a MyBuilder Damp Proofing Specialist

Best Answer

THe answer is to find the source of water ingress and stop it !
Look outside at how the water flows when it rains - does it run into the wall/against it ?
It may just require a down pipe fixing, some part of the wall re-pointing, it may be a crack in the brickwork allowing water ingress or some guttering to be corrected to ensure water runs away from the problem area. A little bit of investigating outside first is the best place to start - It may just require some Safeguard - Storm Dry painted over the bricks - or some waterproof "putty" to fix a crack. If you can stop the water ingress now then the spoiling on the interior decor can be saved and just painted over when dry. Good luck - Annabelle


Answered 20th Sep 2012

Post your job to find high quality tradesmen and get free quotes

Can’t find an answer? Ask a new question

Question Categories