DIY Doctor

Rising Damp

Postby Sparkydelux » Thu Jan 28, 2010 7:07 pm

I have a lounge that has one external facing wall which is getting damp on the inside of that wall. The entire room was replastered about 6 months ago and since winter began it has now started to get damp with a bubbling effect and black mould on the inside wall.

The area on the outside of the wall is not concreted and I have dug away about a foot deep below the surface then painted the wall with a Damp Proof membrane hoping that when it rained the water would be below the dpc which is probably non existant in an old 1920's house.

Presumably where i have dug away has actually made it worse and the water is collecting in the furrow then been drawn up the wall.

Any suggestions would be much apprectiated.
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Simply Build It

Postby stoneyboy » Sun Jan 31, 2010 9:05 pm

From your description what you have done is to form a membrane at low level on the wall and any water getting into the wall at higher level is now forced inside. Can only suggest you treat the whole wall with a few coats of silicone dampseal to stop water entering the wall.
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