What method for tiling with UFH

[Brinyan]

I’ve tiled screeded floors before & suspended wooden floors. However, needing to tile a suspended wooden floor, incorporating under floor heating (electric).
The floor is level & solid. I’m thinking of laying 6mm cement insulation boards (screws & flexi adhesive). Then Detramat, or similar decoupling membrane, then UFH, then tiles, all with flexible adhesive.
Does that sound about right? Any advice welcome. Thanks.

[paulwirral]

Heating element straight onto the cement boards or ply , it’s self adhesive , then level over with self levelling compound or tile adhesive , both flexible , then tile on top with adhesive and a notched trowel .

[andy43]

Smaller the tiles the better on a bouncy floor. Our 600x600 ones cracked along most of the board joints, but to be fair there wasn't any decoupling mat used.

[Brinyan]

paulwirral said:

Heating element straight onto the cement boards or ply , it s self adhesive , then level over with self levelling compound or tile adhesive , both flexible , then tile on top with adhesive and a notched trowel .

So is a decoupling membrane not necessary?

[paulwirral]

Brinyan said:

So is a decoupling membrane not necessary?

I’ve never bothered with de coupling apart from on fresh concrete , and I’ve used this method on countless tiled bathroom floors incorporating an electric heating element.
Prime the boards with a diluted sbr solution just to help the element mat stick , it’s a bit of a pain to lay the mat neatly , i use the backing paper to press it down .

[Brinyan]

paulwirral said:

Brinyan said:

So is a decoupling membrane not necessary?

I ve never bothered with de coupling apart from on fresh concrete , and I ve used this method on countless tiled bathroom floors incorporating an electric heating element.
Prime the boards with a diluted sbr solution just to help the element mat stick , it s a bit of a pain to lay the mat neatly , i use the backing paper to press it down .

Thanks