Hi,

I'm going to tile a bathroom, putting the tiles on bare plasterboard.

When a product says use on gypsum, do they mean the plasterboard or the plaster (which often has gypsum written on it) or is it the same thing?

I'm using Mapei Mapegum around the shower, but it says use Primer G first if the surface is gypsum based.

Sorry to sound dull!

Prime 1st then tile.

ditto the above

yeah use the primer g first....then the gum and then tile

As above to all answers

Prime 1st then tile.

try some wba mate or even use primer and then score the walls with a krife befor hand then tile put a small hand fall of sand in to pva with some water roller it on 5-1 mix let it go then tile or if try it mate i use wba sand pva a lot of the time on ald plaster board for skiming at the pub for lunch

WBA is not suitable, neither is PVA mate. Even more so in a shower area.

Have a search on the forum as to why not

http://www.tilersforums.co.uk/tile-a...ighlight=p.v.a

Originally Posted by dave_ave

Hi,

I'm going to tile a bathroom, putting the tiles on bare plasterboard.

When a product says use on gypsum, do they mean the plasterboard or the plaster (which often has gypsum written on it) or is it the same thing?


I'm using Mapei Mapegum around the shower, but it says use Primer G first if the surface is gypsum based.

Sorry to sound dull!

If you are tiling to plasterboard you would generally be sticking the tiles to paper cos the gypsum is the white stuff between the paper. If it is skimmed then that is usually gysum plaster. If it is not skimmed it will often be kointed and the jointing compounds again are often gypsum based so there is no getting away from it really.