I have to tile some plasterboard over a bath with shower. I know there are ongoing debates about the advisability of plasterboard in this location / using pva or special tiling primers.
In this case, the plasterboard is already there so I was thinking I'd prime it with SBR:
Anyone done this? Is it likely to do an acceptable job?
On Wednesday 06 November 2013 21:44 mike wrote in uk.d-i-y:
It will not do any harm - tile adhesive loves SBR.
In fal BAL Greenstar tile adhesive recommends *new* polished plaster skim
*is* primed with SBR.However, the PB is going to drink it like a fish and while it will help, it will not make it 100% waterproof.
I never bothered and professional tilers never bothered. As long as the grout is waterproof, the tiles are. What is the point?
I would suggest using an admix waterproofer in the grout mix. (Also helps stop dirt getting into the grout surface which can subsequently go moldy.)
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