Hiya
I've bought some handy heat 10mm thermal substrate backer boards to fit under tiles in my kitchen (we're not having underfloor heating, but there is a void beneath the floor of almost 1.5m and its bloody cold!) however, my kitchen floor is made up of 2/3rds floorboard, and 1/3 concrete slab.
The manufacturer recommends fixing to concrete using an ordinary floor tile adhesive (preferably rapid setting).
I'm concerned about movement between the concrete and wooden parts of the floor - although this has never been a problem before (tiles are currentlydown on 15mm ply on the wood part, and cement on the cement part).
My question is: Some of the backerboards will need to be both on the wood and the concrete. Do I need to use a special membrane to cover the join where these to different floor materials meet? Or would a flexible tile adhesive do for the concrete part and normal screw downs for the wood part
Here's a spec
http://www.handyheat.co.uk/underfloor-heating/insulation.html
Thanks in advance for any help!
Faye
I've bought some handy heat 10mm thermal substrate backer boards to fit under tiles in my kitchen (we're not having underfloor heating, but there is a void beneath the floor of almost 1.5m and its bloody cold!) however, my kitchen floor is made up of 2/3rds floorboard, and 1/3 concrete slab.
The manufacturer recommends fixing to concrete using an ordinary floor tile adhesive (preferably rapid setting).
I'm concerned about movement between the concrete and wooden parts of the floor - although this has never been a problem before (tiles are currentlydown on 15mm ply on the wood part, and cement on the cement part).
My question is: Some of the backerboards will need to be both on the wood and the concrete. Do I need to use a special membrane to cover the join where these to different floor materials meet? Or would a flexible tile adhesive do for the concrete part and normal screw downs for the wood part
Here's a spec
http://www.handyheat.co.uk/underfloor-heating/insulation.html
Thanks in advance for any help!
Faye