Doug71
Established Member
My mother lives in a little old house which has a few damp issues one of which has me baffled.
There are a couple of damp marks which are slowly getting bigger on one of the ground floor ceilings where it meets the wall. This is an internal wall.
I have lifted the floorboards in the bedroom above and there is no sign of damp or anything wet apart from a kind of tide mark on the top side of the plasterboard that forms the ceiling below. There is no plumbing or pipes anywhere near it.
I am told that the wall had damp problems so was dry lined with timber battens and foil backed plasterboard.
My theory is the damp on the ceiling is caused by moisture coming out of the old wall which has nowhere to go because it is trapped behind the dry lining, that cavity will be really damp and it's soaking into the ceiling?
Does this sound right? Any other theories? How can it be solved, will some vents help or should we get rid of the dry lining altogether and use some breathable type plaster? Could I put some holes in the ceiling above where it's dry lined to vent it although this would just be letting the damp air circulate around the first floor joist?
I think the external walls have had the same treatment but also contain kingspan.
The house is really damp in places and also has issues with dry rot
Any advice appreciated, Doug
There are a couple of damp marks which are slowly getting bigger on one of the ground floor ceilings where it meets the wall. This is an internal wall.
I have lifted the floorboards in the bedroom above and there is no sign of damp or anything wet apart from a kind of tide mark on the top side of the plasterboard that forms the ceiling below. There is no plumbing or pipes anywhere near it.
I am told that the wall had damp problems so was dry lined with timber battens and foil backed plasterboard.
My theory is the damp on the ceiling is caused by moisture coming out of the old wall which has nowhere to go because it is trapped behind the dry lining, that cavity will be really damp and it's soaking into the ceiling?
Does this sound right? Any other theories? How can it be solved, will some vents help or should we get rid of the dry lining altogether and use some breathable type plaster? Could I put some holes in the ceiling above where it's dry lined to vent it although this would just be letting the damp air circulate around the first floor joist?
I think the external walls have had the same treatment but also contain kingspan.
The house is really damp in places and also has issues with dry rot
Any advice appreciated, Doug