Underlay for LVT with underfloor heating

[shalalala]

Any recommendations of where to get underlay for LVT/click vinyl which works with underfloor heating? Floor is fairly uneven so need something good! Thank you

Whatever you do, make sure you also use a hard floor like ply!

We have UF heating (piped system) laid into special insulation board with foil backing, then a more robust and tightly packed (but still essentially foam) insulation and very thin membrane roll of insulation.

There are delightful dents across the entire surface where either heavy furniture was placed or where there is high traffic (such as sink area or the spot by the island we use the most for prep).

If we’d known - we’d definitely have used ply!

Also, if the floor is uneven, insulation won’t fix that. It would need to be levelled before the UFH or the LVT go on I would think?