Ok im thinking of tiling the cheeks on my dormer windows on my new roof.

I have looked at all the alternatives and would have had lead but i have to have an antique brown roof tile to match the surrounding houses.

So im thinking of a cream polished porcelain to match the what will be cream (ish) K-Rend finish at the front and rear of the ground floor.

My problem is i have never tiled anything external apart from sand/cement for patios.

There is nothing on the plans about the substrate for the cheeks and would normaly go for 18mm WBP ply, however im thinking now about 12mm hardi backer with tanked joints and tiles on top.

So, can anyone think of any problems i might encounter, suggest adhesives for external use.

Hardi do not recommend their boards for external applications.

Thats them outta the window then. I could still use the ply but would tank it

Used a type of cement board on mine and painted it will find out what i used :Pete

Blimey PJC thats huge!

Originally Posted by Scottley

Blimey PJC thats huge!

what my dormer ? it was a sort of cement board i got from my shop fitter friend i put some pics without the board in my pics where you can see the ply

No, the house!

Originally Posted by Scottley

No, the house!

well i am old been doing houses for years lol

Originally Posted by pjc

well i am old been doing houses for years lol

Hopefully ill catch you up then with my project

scottley rang him today he is on holls will try to find out from someone else

Scottley this is what i used Cembrit 10mm board
Cembrit ? roofing and cladding specialist