Gypsum

[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!

 

[Gazzer]

Prime 1st then tile.

 

[david campbell]

ditto the above

 

[Stu Lilley]

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

 

[White Room]

As above to all answers

 

[merlecollins]

Prime 1st then tile.

 

[kent tiler]

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 :deal::47: try it mate i use wba sand pva :8:a lot of the time on ald plaster board for skiming at the pub for lunch

 

[Colour Republic]

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

 

[david campbell]

http://www.tilersforums.com/tile-ad.../2511-p-v-versus-primers.html?highlight=p.v.a

 

[Ajax123]

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.