Thermal boards on floor boards

[Jvc]

hi all

I’m looking at laying thermal boards on top of floor boards, then under floor heating, then self levelling, then tile.

Is this advised? Is the thermal board strong and sturdy enough to take place of a ply or cement board in this instance ?

Thanks in advance

 

[Chalker]

Yes mate.
Fix any loose boards.
Check for deflection in the floor and rectify.
Prime the boards with acrylic primer.
Lay boards with powdered flexi adhesive and back skim the boards.
Fix with screws and wedi washers.

I would recommend using 10 mm boards for strength and insulation properties.
If the floor is really good, you could use 6mm.

 

[Jvc]

Great, thanks very much.

Just checking... is it not enough to screw the boards down with washers ? Would you stick them down with adhesive also ?

 

[WetSaw]

The adhesive not only sticks the boards it fills any voids that may be there.

 

[Dumbo]

As above but for the small cost involved is it not worth the belt and braces approach .

 

[Jvc]

Great. Thanks all

 

[Perry]

you can't go wrong with 10 mm.

 

[Jvc]

Cool. Cheers guys