concrete floor, insulation boards & heating.

[peegee tips]

Hi all about to quote on a job which is a 24m2 kitchen floor( concrete )
One quote with undertile heating & insulation boards & one without.
If i use r/s/flexi adhesive to bed the insulation boards & again over the undertile heating for the tiles, will this be sufficient enough? Would i need to consider an uncoupling membrane?
If its just tiles straight down with rapid set, would i also need to uncouple?
Tiles will prob be porcelain or ceramic.
Many thanks,

 

[DHTiling]

Needs to be flexi with or without insulation boards...

 

[peegee tips]

Even without undertile heating?

No uncoupling material needed either then?

 

[grumpygrouter]

Even without undertile heating?

No uncoupling material needed either then?

If porcelain tiles, you will need a flexy adhesive (polymer modified). If normal ceramic on unheated tiles you will be ok with a standard adhesive. Decoupling membranes are not required in this case either unless you think there may be movement that needs addressing.

 

[john32145]

U could use slc over the ufh if u dont fancy tiling straight over the ufh, this will protact the cables.

John

 

[peegee tips]

Cool so...

Boards+heating+tiles = r/s/f & flexi grout ( ceramic & porcelain )
Straight to concrete = normal r/s unless its porcelain.

Just that i have two conflicting opinions.

Decided not to self level, trying to keep the height down a as much as possible. I always use a plastic trowel over heating.

 

[DHTiling]

I was just going off no insulation and with insulation and ufh....


If no ufh then rapid set will do if it is suitable for porcelain...

so you got it right..

 

[grumpygrouter]

Cool so...

Boards+heating+tiles = r/s/f & flexi grout ( ceramic & porcelain )
Straight to concrete = normal r/s unless its porcelain.

Just that i have two conflicting opinions.

Decided not to self level, trying to keep the height down a as much as possible. I always use a plastic trowel over heating.

Don't see why slc should add much height, you only level to the top of the cables, well I do anyway.

 

[Gazzatile]

Speak to Matt manufactor as some say to cover cables with SL some say tile straight onto with RSF

 

[peegee tips]

Excellent.....cheers.......

As for the self levelling,Its nice to save the customer the extra expense when i can tile straight onto the heating wire.....i know we're only talking a couple of mm.......but saves money & my time especially over 24m2.

Thanks anyway.