Preparing Dried Hardwall for Tiling

[sa85]

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 directly to the Thistle finish coats, except where the system includes a bonding agent.

What is the best method to prepare this for a Thistle MultiFinish?

 

[Stewie03]

so somebody came in floated your bathroom in Hardwall and didn’t apply any finish coats to the walls

 

[Monkey Boy]

Yes

 

[sa85]

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.

 

[Stewie03]

Well if your having the whole bathroom tiled from top to bottom go cheap as s**t and get a chancer in to skim the walls the tiles will cover there dodgy attempt

 

[themucky1]

6 months?????

 

[Tinytom]

Why not just d+d if it’s all tiled

 

[Cockney]

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.

 

[malc]

Hose the Hardwall down ,PVA ,then skim.