My sister has a 1930s semi- detached house ,all completely rewired, new kitchen/ bathroom and fireplaces removed. Replasteted. Done about 10 years ago. She now has ' rising damp ' on the inner connecting wall of the dining room. The builder says she needs a new damp course . Though this was done too 10 years ago.
I have never heard of rising damp on an inner wall. Is this possible. And what could be the cause?
This could be due to poor ventilation as the fire places have been removed as they are a natural vent also if your windows are old they may not have trickled vents the damp cours should still be good after only ten years
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This all depends if the floor is timber and the joists are on a sleeper wall or if solid flooring if the floor is solid concrete every chance a approved dpm hasn't been fitted if timber the joist should be wrapped in a dpc