1930 end terrace house. 600x300 porcelain tiles

[Bouba]

Retiling my bathroom. 2 walls of the bathroom are external walls(solid no cavity) and are pebbledashed outside. I have removed the old tiles and bricks have been exposed.

Would Sand cement render in 2 coats a good one or can i just stick hardie backer directly on the walls. I was told that render will take time to dry but I have time.

Also worried about damp problems from cold spots behind hardie.

Thanks

 

[Time's Ran Out]

Frame it out, put a moisture barrier in and fix the hardie to the frame.

 

[mache]

Agree with timeless John but would add to insulate with cellotex or similar between framing.
Regards Martin.

 

[White Room]

And block out any holes in the wall to stop cold air coming into the room...

 

[Bouba]

Thanks. If i use sand cement render and wait for a month to dry,can that act as a waterproof and tile directly on it. Its less faffing about with studwork and moisture barrier.

Please advice.
Thanks.

 

[Bouba]

1.If using sand cement render and tiling straight on it,does it still require moisture barrier.

2. If i stud wall it then is 2x1 timber sufficient with 25mm celotex. Does this celotex push firmly against the wall or do i need to leave a gap.