Floor preparation

[Wood's better]

Hi,

I have ripped up a softwood tongue and groove floor, fitted noggins & 22 mm tongue & groove plywood read for UFH and 600 x 600 porcelain. (bathroom)

I propose to lay 6 mm tile backer boards. I have used Marmox before successfully, however, think Hardi is tougher and tightens the floor better (I know its only for the tiling surface, but I think it definitely makes it stiffer.

Please could I be advised: When using 6 mm glued and screwed down is there really benefit in the foam insulation boards over Hardibacker or No More Ply. If it were say 20 mm thick I am sure it would make a difference to the UFH,

I would appreciate your help.

Many thanks

Richard.

 

[Stef]

Hi, there was a thread kicking around about this the other day & it showed the benefit of insulation boards.
It focused more on 10mm boards, I would use a 6mm insulation board especially if there's ufh getting fitted & screeded over with slc.

 

[White Room]

If it is electric ufh I would go with an insulation board....

 

[Wood's better]

Many thanks Marmox it will be!

 

[Qwerty]

This could help you make up your mind...... http://www.tilersforums.com/117-ele...7-heat-retention-tests-insulation-boards.html

 

[Chalker]

Bin the cement boards if your using marmox.

 

[swanman]

insulation boards all the way

 

[widler]

Cement boards can be used with no problem ,but the insulation property's aint as good as insulation boards, but ive done a few, and the customers are happy