Tiling onto skimmed plasterboard - weight limits

[andrewfmills]

Hi all.

I'm in the process of tiling my en suite bathroom in my new extension. I've picked out and bought some tiles only to then realise they're a bit heavier than I was expecting (yes I should have checked first).

The plasterer has boarded and skimmed the whole bathroom without asking anything about what areas will need tiling, so now I'm limited to 20kg/m2 if I stick to the guidelines.

The tiles I've got are 18.8kg/m2, so allowing for grout and adhesive it will take me over the limit.

The question I have is how conservative are these limits? Should I risk it and continue?

 

[lostinthelight]

Was it moisture resistant or plain board

 

[andrewfmills]

Thanks for the reply. I'd have to check with the plasterer but I'd hope it's moisture resistant! How much difference does that make?

 

[lostinthelight]

Thanks for the reply. I'd have to check with the plasterer but I'd hope it's moisture resistant! How much difference does that make?

If its moisture resistant board I think its recommended that it has a coat of blue grit/bondit before skimming or it doesn't hold as much weight as plain skimmed board,