Advise please!

[Fred]

Client is having builder take up floor boards, nogging out & plying out, 25 mm I believe. She wants UFH & Ditramatting. Do I lay Ditramat with addy, fill with SLC, then install UFH then SLC over? Thanks . Fred.

 

[nybor62]

ufh then slc then ditra

 

[Fred]

Thanks.

 

[hillhead]

Would backer boards not be better under the UFH? instead of the ply which is giving so much bother lately.
If ply will the compound stick to the ply?

 

[Stewart]

I would recommend 6mm insulation, then heat mat, then slc then Ditra.