Ask a Tradesman
Damp patches on internal wall due to external leak from chimney
I live in an old terraced house and I have just had my bathroom re-done about a month ago, and when they pulled the tiles off the wall that backs on to the outside, the plaster just fell off as well. The brickwork was absolutely soaking which I since found out was due to a leaking redundant chimney pot. I have had the chimney pot removed and roof tiles fixed etc so hopefully there will be no further water damage. They replastered the internal wall that backs on to the external wall (if you know what I mean) using foil backed plasterboard on top of batons to keep off the brickwork but the internal wall adjoining that, was just bonded and re- plastered. This is the wall that is still showing damp/wet patches . I am hoping it will eventually dry so I can decorate but I am now wondering if the fact that the outside wall is rendered will stop the bricks from drying out all together? Or is it just that the bricks have been wet for a while and it will just take time? (The wall is quite thick in this area) I’ve tried a domestic de-humidifier but that doesn’t seem to be doing anything, do you think it’s worth hiring a more heavy duty one?
Providing the the water problem to your brickwork has been fixed and there is no more water getting to it then really it is just a case of letting the wall dry out. Unfortunately it will take time as the weather has been cold and damp. It will still take time using a de humidifier if the wall is soaking wet. Letting the wall dry out before re bonding would have been better.
Answered 6th Apr 2018