Insulation/floor heating partially basement house

We have bought a house with a partially basement. Now the question arises how we should best approach the insulation and the construction of the underfloor heating. In the basemented area, no problem. Insulate the cellar ceiling, underfloor heating either in a dry system or channeled. How can this be done in the non-basemented area? Remove the screed, then insulate, then underfloor heating, then screed again? Or is there underfloor heating with built-in insulation to the bottom? Does anyone have experience there?

No problem in the basement area. Insulate the basement ceiling, underfloor heating either in a dry system or with chasing.

Or remove the screed and do it properly from scratch. Then you can also choose correspondingly smaller distances (usually 5cm is not possible with chasing) and also insulate beneath the screed, so that the basement ceiling does not have to be insulated as much (gain in height in the basement).

How can this be done in the non-basement area? Remove screed, then insulate, then underfloor heating, then screed again? Or is there underfloor heating with built-in insulation underneath?

Sure, as long as the heights fit – remove screed, insulate, underfloor heating, screed. And because that is how it’s done, there is no special product "underfloor heating with built-in insulation" – did you imagine something special underneath? If the heights are not sufficient, then it just becomes less efficient and/or the installation distances have to be chosen smaller. If possible, I would always remove the old (floating) screed during a renovation (can be done with a big hammer on a Saturday with friends in EL for the whole house). Rebuilding is not more expensive but offers much more flexibility (up to laying electricity on the raw floor).

"Underfloor heating with built-in insulation" - did you imagine something special underneath?

There are at least these Noppjet parts for laying underfloor heating, which come with 3cm impact sound insulation underneath... Rolljet or folding panels as well (with staple grid for underfloor heating) - but that's only enough as the top layer. As floor insulation towards the basement, there should be more underneath.

There are at least these studded parts for installing underfloor heating, which come with 3cm impact sound insulation underneath.

This is the overpriced option for all lazy craftsmen. Usually with the worst possible insulation (WLG 35-40) and low flexibility in laying distances. PUR insulation and grid foil. But then you have to staple and think about how to lay it – the studded panel makes life easier and of course also makes proper installation planning unnecessary.

This is the overpriced version for all lazy craftsmen. Usually with the worst possible insulation (WLG 35-40) and little flexibility in laying distances. PUR insulation and grid foil. But then you have to staple and think about how it is laid – the studded panel makes life easier and naturally also makes proper laying planning unnecessary.

We have in the ground floor (no basement) for our KfW40 new build 12cm 035 and 2cm Puren (I think that even has 023), above that a grid foil and then we staple the underfloor heating on it. In the upper floor 8cm 035 and 2cm staple-fold panel (I think that was also 035, but in the upper floor that is irrelevant). I can look up the exact numbers if desired (prices Dec 23/Jan 24 Lower Saxony)...

But the question was whether something like this exists.