Can I use hardwall as a backing to tile onto. I've been told by many u can and u can't. Many thanks - Tile Advice

[Alex111]

I have a little issue ATM with one I'm fitting at the mo. .900wide 1800long. I bedded it on flex tile adhesive. Not 3 days later the tray is moving.

 

[Dumbo]

If it has failed on Tile adhesive it would of failed on cement . We have had failures on silicone random crack in tray . We stick lots of trays with flexi Tile adhesive much like tiling you have to make sure you have good coverage

 

[Flintstone]

I once had to re fit a tray that the plumber had stuck down with plasterboard adhesive

 

[Alex111]

There is very minimal movement in the ply wood. So I can't see it being this But maybe it is. It's very frustrating.

 

[Dumbo]

If its moving I would think that would be your problem

 

[Flintstone]

The bottom of the trays aren't usually a great surface to stick to hence using an s2 like ultimate that stick to all sorts of surfaces

 

[Alex111]

It hasn't stuck at all. I lifted the tray up no prob. I don't think u can ever make a ply wood floor non moveable.

 

[White Room]

British gypsum say no as it is one part of a two part system

BG change the goal posts to suit by the sound of it.

 

[Dumbo]

BG change the goal posts to suit by the sound of it.

I remember my chat with bg there was one under coat they would recommend but not hardwall . When I was trying to get an answer why it wasn't suitable and not just take because I said so I got accused of being aggressive.

 

[SJPurdy]

I remember my chat with bg there was one under coat they would recommend but not hardwall . When I was trying to get an answer why it wasn't suitable and not just take because I said so I got accused of being aggressive.

Which undercoat do they recommend?

 

[Dumbo]

Which undercoat do they recommend?

That I can't remember you will have to call bg

 

[Deane]

Light tile only is ok....seal it first..

 

[Deane]

What's everyone's views on bedding shower trays on to ply wood with sand and cement.

Bad bad idea...

 

[Bathfix Bob]

The sand and cement isnt meant to glue the tray down its just to bed it down, if you come in the next day and start yanking corners up it will move.
Think about the Mira flight leg kit...are the legs glued down?

 

[Dumbo]

Bad bad idea...

If you make a screed mix that is meant for 75mm plus so thin bedding under shower tray there should not really enough thickness for it to be strong enough . Have removed a few trays which were s+c bedded came away really easy. We always bed flexible tile adhesive , much better product to use at those thicknesses .