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

[Alex111]

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

 

[White Room]

No you can't, it's not suitable like many other gypsum undercoats.

 

[Alex111]

Thistle dri coat would be advised

 

[White Room]

Thistle dri coat would be advised

Yes mate but like everything depends on your tile weights.

 

[Alex111]

I need to check the weights. It has said on the BG site that dri coat will take 20kg/m2. I know the tiles are not as heavy as that.

 

[Old Mod]

Add 4/5kg for adhesive and grout too!

 

[Alex111]

Thank you very much for ur help.

 

[Dumbo]

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

 

[Alex111]

I'm assuming I can tile onto multi finish then ??

 

[Old Mod]

After it's fully dried and primed with acrylic primer, not pva!

 

[Alex111]

Spot on. Many thanks

 

[Alex111]

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

 

[Flintstone]

A Terrible idea! But it happens a lot. A tray will not bond to sand and cement and, neither will ply wood really

 

[Alex111]

I have been told alway use silicon to bed them down on. It's flexible and bonds to the tray and plywood. BUT......... Manufactures state sand and cement. Don't want to upset the warranty. But surely it's better to use silicon

 

[Flintstone]

I don't fit shower trays but if I did I would use an s2 tile adhesive.