tile over anhydrite screeds - TilersForums.com

[toshtiles11771]

Hi

Looking for a bit of advice, I have been ask to tile a kitchen and shower room floor in a new build by a contractor. Just found out today it has a anhydrite screed on the down stair floor.

I have looked on the net for information and it said that it has to be mechanically [FONT=arial, helvetica, sans-serif]abraded and an appropriate primer to be used.

Just looking for any information or advice from anyone who has tiled app on this type of screed.

Thanks
Tosh Tiling [/FONT]

 

[Gazzer]

http://www.tilersforums.com/tile-ad...00-method-prep-priming-anhydrite-screeds.html

 

[Gazzer]

On a more personal level. When faced with these screeds I Sand the floor with a 7" rotary sander with 40grit discs. I hoover the remaining dust away and I have used N&C Gypfix adhesive.

 

[toshtiles11771]

what type of primer did you use ? Flexi cement base adhesive ? slow or rapid set ?
It's just I've read a few posts of the tiles failing, its a big area and don't fancy having to fork out for any rework.

 

[Gazzer]

There is no need to prime with Gypfix according to the manufacturers as it is a gypsum based adhesive.

 

[White Room]

I thought those screeds were not to be used in shower rooms.....

 

[Gazzer]

I thought those screeds were not to be used in shower rooms.....

I assumed when he said Downstairs floor he meant just the kitchen floor.

 

[Spud]

I thought those screeds were not to be used in shower rooms.....

It is not recommended Mark but can be done if you tank it

 

[toshtiles11771]

thanks for all inputs guys ! Yes there is to be tiling in a shower room (not wet Room), is it still recommended to tank floor even if there is a shower tray ?

 

[White Room]

From reading Garys post, the floor where it's going to tiled in the shower room will need tanking....