Yet another building question.

[Norman Verona]

Plasterer says to PVA the plasterboard before putting tiles on.

Friend who does tiling says NEVER put PVA on as the tiles will fall off.

Who's right.

(Oh, one half is already PVA'd so I'll let you know which half the tiles fall off in a few weeks.)

[housebeautician]

I do lots of it Norman and i dont pva it.

Always pva new plaster

Its down to the individual of course.

[Norman Verona]

Well, i did pva part of the wall but then stopped when pete popped and told me tales of horror about pva on plasterboard which is being tiled. I've done a 1/3rd of the wall and it seems ok.

[DerekJ]

It depends on the surface you are tiling on.

Porous, like virgin plasterboard, no.

Glossy, like melamine board yes.

But I'm not a tiler so what do I know?

[Norman Verona]

Derek, it wasn't "you don't need too" or "you shouldn't" it was "YOU MUSTN'T"

It's new plasterboard.

Anyway time will tell, as always.

Thanks lads.

[Gromit]

+1 for no PVA here.

[pete g]

tiler told me to pva mine

water proofs the walls    been up 10years not fallen off yet

[Norman Verona]

Thanks all, as usual a sort of draw.

Thing that "got" me was that by putting PVA on the dry lined wall the world was going to end and hell was freezing over.

I'll report back in a years time if either side has any sort of problem. It's nearly done now. Only bit left is to clean the grout off the window reveals but with a very painful back due to bending over to tile under the cupboards I can't reach.

Day off today. Taking Lynne to her re-education and then shopping for the last bits and pieces.

I should be completely finished to the point of moving back by the 21st when the gas tank is installed. Boiler is due on 25th to 29th and then I can put the final floor boards down (have to be open to fix the leaking joints!).

Moving date is set for 1st November.

[hilux]

Depends on the PVA application. Its too thick on its own so adding water can delaminate the PB surface

Use moisture resistant PB and its less of an issue but you shouldnt need to use anything

I always use ply on tiled walls for showers etc as its stable and will resist dampness a lot more

[Norman Verona]

Paul, I have ply for the shower walls so that's OK.

I mixed the PVA with 75% water but stopped about half way because pete came in and ... as above.

Reminds me, I must go and look to see if they're still on the wall.

[Buzz Billsberry]

Well Norm I bet you're glad you asked that question!The answer is as clear as ketch-up.

Good luck

Buzz

[Norman Verona]

SNAFU

[Darrell O'Neill]

The idea of priming the surface is so that the moisture from the adheisive isnt pulled out by the plasterboard before it has time to cure.

EVERY pro tiler and builder I know will use a watered down mixture of fresh plasterboard, but using SBR not PVA, a stronger mix is required on plywood for the same reason.

Ive done loads of tiling this way and never had a problem.