Tiling on top of insulation

[lucius]

Hi All someone has asked me about laying rigid high density insulation direct on a concrete floor and then tiling on top of this does anyone have any experiance of this .
Regards Andy

 

[DHTiling]

Hiya.......Can you give us some more details please....like what is the insulation called..thickness...are these insulation boards etc etc....

 

[lucius]

Dont know exactly what the insulation is but it will be some kind of rigid high dense polystyrerne probably similar to Knauf.
Andy

 

[DHTiling]

Right Ok...for what reason do you need these boards....are you installing UFH,,?

 

[Perry]

yes we used to tile like this a few years ago ardex used say it was ok but they wont now never had a problem with it as far as i know and i still cant see a problem with it IMO : Pete

 

[lucius]

No U.F.H The guy is converting an out house into a bathroom which has a perfectly good concrete floor but he would like to insulate it but dosent want to raise the floor level to much.
Andy
Cheers pete for reply

 

[DHTiling]

You can do it no probs.......stick down with rapidset and tile in with adhesive suitable for the tile.....these insulation boards will only raise the floor temp by a couple dgs though...

Have you not though about electric UFH..?...nice warm floor then..

 

[lucius]

Cheers Dave for that i dont think the guy will go for UFH as it is a bit of a budjet job but i will mention it, the only problem is that i am in Spain and as far as i know their is no rapid set here, to stick the tiles i would have used Flexi.
Andy

 

[DHTiling]

No probs andy....just means you will have to stick the insualtion boards down with standard set and wait a while longer before walking on it...

Are these boards cement faced ..?..

 

[lucius]

No Dave they wont be cement faced
Andy