ᐅ Insulation of upper floor ceiling. Was it inspected by an energy consultant?

Hello, our energy consultant is prescribing insulation for the upper floor ceiling. See attachment.
PUR/PIR with thermal conductivity value 0.023 W/(m·K), 12cm (5 inches)
Then again PUR/PIR with thermal conductivity value 0.023 W/(m·K), 12cm (5 inches), plus OSB boards.
I think this is a lot.
We are building according to KfW 55 standard.
Ytong 36.5cm (14 inches) with 0.08 W/(m·K)
Air-to-water heat pump
Ground slab insulated with 14cm (5.5 inches).
My question: does the energy consultant actually come to the site to check the insulation?
So far, he has not even been on site. We have already finished the shell structure.

Insulating the ceiling is the most effective of all insulation measures. Why do you want to make changes to the design?

Because 24cm (9.5 inches) of insulation with a thermal conductivity of 0.023 W/(m·K) is not necessary. That is simply too much.
This concerns the upper floor concrete ceiling. It is unheated and used only as a storage area.

Delm86861219 schrieb:

Because 24cm (9.5 inches) insulation with a thermal conductivity of 0.023 W/(m·K) is not necessary. That is simply too much.
This concerns the upper floor concrete ceiling. It is unheated and used only as storage space.

But the room below is heated. You don’t only want to prevent heat from escaping upward to keep the lower space warm. You also want to avoid warm air rising from below into the cold roof area, as this can cause mold growth there.

If calculations are based on KfW 55 standards, the construction must comply with KfW 55 requirements. This is stipulated in the building permit / planning permission. Otherwise, the construction is not legal.
Insulation is applied to keep the building warm.
The blower door test will likely fail or not pass.

What does the blower door test have to do with this? It only checks airtightness, not thermal insulation.

The energy consultant must confirm the proper implementation after construction is completed. This can be done through on-site inspections, checking delivery notes, and so on. Alternatively, they might just sign off without verification if they want to take the easy route and are not worried about audits by the KfW.