Dot n Dab adhesive - making it water proof

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Hi guys,

I bought a newly renovated, 1900 traditional mid terrace house around 5 years ago. The builder dot n dabbed the plasterboard to front external wall and I am now starting to penetrating damp through the "dabs" on bottom metre of wall. I really don't want to take the lot down and have to put up a stud frame and was wandering if there was a way to make dot n dab adhesive water resistant, then i could just take off bottom half of platerboard, dot n dab new boards using water resistant adhesive to stop penetrating damp.

Would something like Sika work or are there any specific adhesives for this?

thanks

al
 
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I don't think there is anything that wold make the adhesive waterproof, although I would be interestes in mixingit with SBR as an experiment.

If the wall is damp I would think that the damp will track along the outside of the dabs regardless of what they are made of, just a bit more slowly.

Better to think of some kind of barrier behind the boards . I'm assuming there is not much room so we have a problem here.

Suggestions anyone ?

Fix an egg box membrane to the wall and then dab onto this?

Edit - or membrane and then render or other damproof product and skim over the lot?
 
I could be penetrating damp but it could also be caused by condensation forming on the cold spots where the adhesive dabs are. If it is penetrating damp, after 5 years you will also have all sorts of unhealthy nasties festering in the gap behind the boards & if he’s used ordinary wall board it’ll most likely be disintegrating from the back.

With solid external walls what the builder has done is completely unsuitable, is not a renovation but a cheap & nasty bodge which is now starting to show itself & is probably far worse than you can see. Using waterproof caulk & SBR is not a long term solution & will only be a temporary fix, the only real cure is to take it all down & do it properly with a vapour barrier & insulation.
 
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Thanks, the easiest solution would probably be a coat of water resistant render on bottom metre and half of internal brickwork and then dot n dab plasterboard back on, then make good with a skim.

Thanks Karis, I understand the best option is to do it right and put up a stud frame but unfortunately I have a tennant in the place and that sort of work would cost too much to get someone in to do it.

I guess another option would be to use this http://www.kingspaninsulation.co.uk...cd6/Kooltherm-K17-Insulated-Plasterboard.aspx to dot and dab directly, but again i would need to take the whole wall down first.

If anyone in leeds fancies quoting for ripping, down, building frame and replastering etc then get in touch, otherwise i think a short term solution is required.
 

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