Stewie in one!
I'm thinking a couple of coats of 4 parts water to 1 part glue and a multifinish over the top. The hardwall is proper dry, but worried about high suction from it.
I have a bathroom that has been plastered in Thistle Hardwall and subsiquently found this can't be tiled onto as it need a top coat finish.
This was done 6 months ago so is now fully dried, I was looking at using Thistle GypPrime but the white books says "Tiles up to 20kg/m2 can be applied...
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