Plastering & Rendering

can i mix waterproofer in plasterboard adhesive??

Anonymous user 3 March 2024 - 2.59 PM

I've a small job to do patching over some penetrating damp in a stone cottage. Its a tricky one as the stone work is like a tramps teeth and requires around 4 coats of render to level it, normally I would batten n foil back plasterboard it but in areas its not deep enough to do so. The only solution I can come up with that doesn't involve making 4 trips build the render up is to do a thin render/ dricoat screed to seal n level a bit then dab a 3/8 board on. My question is whether I should mix some waterproofer in the dotting?? I'm not sure if it will affect the adhesion or not, its only a mtr sq patch. Cheers guys for any advice Thanks HTH Gareth, im not looking to 'bodge' or cut corners, its customer time restraints that are limiting my options or would simply render as usual. My question is whether anyone knows if waterproofer will affect adhesion? ive had many plasterers ask me the same question before and have been unable to answer them. BG say is not advasable but do not give any reasons why. Im going to stick with slowly rendering this job but would still like to know if anyone has used waterproofer in dotting before and what the outcome was. Thanks for a great answer John, just what I was wanting to know. Thanks to everyone who's answered, much appreciated