Hi there,
I've got a problem with damp in our downstairs loo. There has always been a little bit of black mold on the wallpaper ever since we moved 10years ago but i'd put this down to it being a cold external corner of the house which was poorly heated as the radiator in there hardly worked. Had the central heating fixed and the problem seemed to go away for a few years. However the toilet cistern still ran with condensation when it was really cold outside, i put this down to the cold mains water entering the cistern when you flushed. Over the past 6 months i have noticed the damp has got a lot worse and the plaster is now blown along the entire length of the wall aprox. 25 feet. I've checked the external wall and the outside ground level is about 12" below the dpc and the floor level inside is another 6" above the dpc. the external brick work and mortar looks good, and what i can see of the dpc looks ok. The external wall is cavity with sprayed in insulation.
Spoken to a couple of specialist damp proofing companies and they all want to inject the external wall and treat it, despite there being no issue with.
My question is as all the visible bits of the external dpc all seem ok could the internal cavity wall's dpc have failed. can this be treated? will it be berried in the concrete floor slab which will need digging up along the perimeter. This could be an issue as part of the effected wall has the stair case on it
I've got a problem with damp in our downstairs loo. There has always been a little bit of black mold on the wallpaper ever since we moved 10years ago but i'd put this down to it being a cold external corner of the house which was poorly heated as the radiator in there hardly worked. Had the central heating fixed and the problem seemed to go away for a few years. However the toilet cistern still ran with condensation when it was really cold outside, i put this down to the cold mains water entering the cistern when you flushed. Over the past 6 months i have noticed the damp has got a lot worse and the plaster is now blown along the entire length of the wall aprox. 25 feet. I've checked the external wall and the outside ground level is about 12" below the dpc and the floor level inside is another 6" above the dpc. the external brick work and mortar looks good, and what i can see of the dpc looks ok. The external wall is cavity with sprayed in insulation.
Spoken to a couple of specialist damp proofing companies and they all want to inject the external wall and treat it, despite there being no issue with.
My question is as all the visible bits of the external dpc all seem ok could the internal cavity wall's dpc have failed. can this be treated? will it be berried in the concrete floor slab which will need digging up along the perimeter. This could be an issue as part of the effected wall has the stair case on it