I have a gable wall in hallway running through to under stairs cupboard that is showing damp (wet) patches. These can come and go depending on hall humidity. It has reached a point where action is needed as I am unable to decorate. There appears to be no obvious external signs of a problem eg leaking gutters, downspouts or render problems. Attached are a few pics showing the problem. I also have damp/wet problem on one internal wall in the front lounge - see pic. Without opening up a debate on DPCs and existence of rising damp, is there any circumstance where you would hack off all plaster to 1m and install chemical (cream) DPC? In my circumstance I can’t see an alternative, the plaster is shot. I am at a loss what to do and do not want to waste up to £1k if not necessary. I have had similar quotes and advice from 3 companies. All said rising damp and all suggested same approach to remedy the problem – hack off/chem DPC etc. Any advice appreciated.
Is it a new dpc or not - advice needed on damp problem
- Thread starter Gille
- Start date
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It's a semi, built early 30s, think it is cavity wall but will need to check. Will sort some external photos tomorrow, a bit dark outside now
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Any idea what this usually costs?
Update Sunday 24 Sept - a few external pics now attached. Dashing has been on about 15 years
At a guess, the patio could be a bit high.
Where is the damp proof course? I can't see it on your photos for sure, but I suspect it's the mortar line, where the air-vent is sat on? Can you see it?
If this has failed, I think your only solution will to inject.
If the wall is solid (maybe) then you can drill in dry-rod into the mortar line below, this will flow along the mortar and make a new kind of DPC.
Had similar problem on a wall, its also rendered, turned out, old internal concrete floor was one brick too high and no membrane, since digging this out and suspending floor with new joists & air vents, the problem has gone.
If you can get expert help for £50 it's worth a punt.
Where is the damp proof course? I can't see it on your photos for sure, but I suspect it's the mortar line, where the air-vent is sat on? Can you see it?
If this has failed, I think your only solution will to inject.
If the wall is solid (maybe) then you can drill in dry-rod into the mortar line below, this will flow along the mortar and make a new kind of DPC.
Had similar problem on a wall, its also rendered, turned out, old internal concrete floor was one brick too high and no membrane, since digging this out and suspending floor with new joists & air vents, the problem has gone.
If you can get expert help for £50 it's worth a punt.
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