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Damp Proofing
plaster board onto brickwork?
Anonymous user 3 March 2024 - 3.06 PM
Hi, I've recently had an old wooden frame (floor to ceiling) removed from a bay window. When the builder removed it, there was nothing between that and the original brickwork. He said at the time he would apply render then plasterboard to make good the wall. In the last few weeks damp patches have come through on our newly painted walls. He now says he put plasterboard straight onto the brickwork as the walls had externally been injected with chemical damp proofing. Is it usual to put board straight onto brickwork or is this considered bad practice? Trying to get my head around why I've paid out to builders and damp proofers but still have damp walls..
Are you a tradesperson and able to answer this question?
The answer to your question is yes, it is called dot and dab boarding. The plaster board is stuck to the wall with adhesive and is very common practice to apply this way for uneven walls. There should not be any more damp coming through the wall if it has been injected, all professionally treated walls should come with a guarantee after completion. It either has not been done correctly or something was missed. It is hard to give an answer to the possible causes without seeing the area at first hand but you also said that a paneled wall was also removed! was it attached to the window ? if so removing it could have disturbed the frame and that could also be the problem . Hope that helps.....
cant be 100% sure without looking.
chances are its a single thick brick wall,
injected damp proof course only works for rising damp not penetrating damp which is most likely what you have,
rising damp is misdiagnosed in over 70 % of cases
would be grabbing the builder and telling him to get it fixed.
good luck Alex
Answered9 April 2014
1
Anonymous user
I would suggest that the damp could be coming from a multitude of places it could be coming from a window very close to the affected area, maybe it is coming from the external wall as it might need a repoint, it could be that the builder didn't check the wall for cracks and holes and didn't parge the wall and seal the board all the way round the edges. all of these are good reasons myself I would have used browning and finish as this would have filled any gaps on the exterior wall
