Assessment of the offer price for insulation under the floor slab

And the necessary insulation (thickness, insulation value) against the ground has been calculated in the thermal protection verification...

We had two quotes prepared based on a self-drawn plan. The requirement was to comply with the currently valid [Energieeinsparverordnung].

Well then, good luck.

We had two offers prepared based on a self-drawn plan. The requirement was to comply with the currently valid Energy Saving Ordinance.

You must give clear instructions on how the insulation should be done. This should be derived from the planning (thermal protection certificate).

The companies cannot know how to comply with the Energy Saving Ordinance. That depends on the entire planning (walls, roof, windows, etc.).

Who is the site manager? By the way, he is liable for ensuring that you adhere to the planning and must also monitor this.

They are local construction companies that have built dozens of houses with us. The thermal protection certificate is of course only available upon the creation of the submission plans.

Is it different in other federal states? In our case, the thermal insulation certificate, as well as the structural analysis, had to be available before the building permit was issued. The house can only comply with the Energy Saving Ordinance as a whole; a single component on its own cannot comply with the Energy Saving Ordinance. Again the question: Who is the construction manager? Who planned the house?