Hi all,
Currently doing the kitchen, and have decided to install electric UFH under the whole tiled floor. The floor will be tiled in ~8mm thick porcelain tiles, onto a concrete floor. The concrete is about 75mm thick, laid directly onto hardcore.
The UFH is only there to make the floor warm to the touch. We have plenty of heating from the CH to heat the room.
In a perfect world, I'd dig up the concrete, dig down about a foot, insulate and screed. But I'm not going to do that. I'm just going to tile the floor. What I'm trying to decide is whether to tile directly onto the concrete or onto some kind of board material fixed to the concrete.
Half inch WBP is an option, and would provide some insulation. But I'm wondering if I can get a sheet material (1/2-3/4") that will be significantly more insulating than the ply, or if I should bother with any sheet material at all, or just tile onto the concrete.
TIA