Tiling onto Foil-faced Kingspan/Cellotex type stuff

[SimplePimple]

Will bathroom tiles adhere OK to foil-faced insulation board? I'm renovating a small bathroom. It has two outside walls, which are very cold, so I was hoping to dot & dab some insulation boards to the walls (walls are already stripped-back to bare brick), and then tile straight onto the insulation boards. I've got some spare 22mm "Kingspan" type board, which should be ideal, however it is foil-faced on both sides, so I'm not sure how well the tiles will stick to it. I was was thinking of painting on a slurry of adhesive first if necessary. Is this likely to be succesful? Thanks.

 

[lancenotalot]

No the insulation boards won't take the tiles,you will need to board over them with plasterbrd and you will need to fix through the plasterbrd and insulation into the blockwork.

 

[SimplePimple]

Thanks. Is there no primer or anything I could try that would make the tiles stick? It's a small room already so I'm really reluctant to loose any more space with another layer of plasterboard. As well as a primer I could "rough-up" the surface of the board if you think that would help?

 

[skitzee2k]

Simplepimple, One thing that might get you around this little problem is Ardex WPC. It is a waterproofing kit which consists of a powder and paste. http://www.ardex.co.uk/pdfs/ARDEX WPC.pdf

Might be worth giving their TEC a call in the morning, they are always happy to help.

The reason I mention this product is because it sticks to almost anything and gives you a nice rough finish to tile onto (as you roller it on).

 

[SimplePimple]

Sounds good, thanks.

 

[skitzee2k]

No problem, that will most likely give you your surface to tile onto, but weight will still be an issue so check with supplier of insulation to make sure of weight allowance.