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wrote:

tarquinlinbin wrote:

Is it ok to tile directly onto new plasterboard?

Wel, I painted mine first with a light wash of emulsion [and allowed to
dry ;-)] before tiling.

I thought it would the porosity "problems" of the board.

Cheers

Paul.

Makes very little difference.

PVA is better - it is water RESISTANT in that it fills the pores with
its own (water soluble) polymer.

Frankly however, unless you have a permanent puddle, tiles straight onto
fresh plasterboard work just fine.

The grout dries faster than the water permeates backwards

All my bathrooms are simply his, and all take a good splashing with no
ill effects.

The only places I have had problems are where permanent small
drips/leaks have kept an area wet for weeks on end.