attaching floor gypsum to grooved underfloor heating

[norralappland]

Is it only Ardex that is used for fastening?
and is it possible to level a little when using Ardex S48

 

[Allmänobildad]

If it's not a bathroom, any sättlim should work together with screws.

 

[Andreas_kalmar]

You get worse heat development if you use plaster against self-leveling compound regards andreas