Forgetting perimeter insulation

No, you’re not writing in Turkish. It is clear what you mean. I just consider it negligent. It’s not about heating costs, but about the calculation for the entire building, which must comply with the energy saving ordinance. A insulated slab was planned and calculated here. If this is omitted, the calculation no longer adds up, and the thermal insulation certificate is no longer valid. However, it must be correct for the approval to be valid. This cannot be compensated for with a few euros. I already wrote the proposed solution above: improve the insulation on the slab.

Technically, I am blowing the same trumpet. To prevent a house without a basement from having cold feet, concrete works as well, on top of that a bitumen waterproofing membrane as a moisture barrier, then insulation material, then the heating pipes, and then the screed. That works too. So technically, there is still something to be saved. It is not exotic either, but built like this a thousand times. Karsten

It is indeed not entirely irrelevant with regard to possible funding. That must be checked! However, what Karsten wrote is correct. As long as no [Betonkernaktivierung] has been integrated, it is possible to insulate on the base slab without any problems. Here either thicker or with better material.

Hello and thank you for your answers - they at least make me hopeful that something is still possible. And yes, we are building without a basement and only the foundation walls of the ground floor are up. The brick cladding is also already completely done, but it has to be removed again because it was poorly executed and partly thermal bridges were created at the entrances/exits.

All this was discovered by our "new" site manager, after in my opinion the first site manager did not even remotely take adequate care of our construction.

OK, a specialist lawyer is probably unavoidable at least for initial consultation. Thicker insulation under the screed can be compensated by an additional row of stones on the ground floor. However, this changes the overall height and must be reported at least! However, my knowledge does not go further in the paperwork.

Regards Joe

It was bricked before the ground floor ceiling was installed?? I've never heard of that before.