Energy Saving Certificate KfW55 - Target KfW40 - Question: Steps & Costs

The additional costs are quite straightforward: money is earned from the change orders. The wall construction lacks a concept when looking into the pdf, furthermore, well, rather plain to put it mildly.

Another question on the topic of the energy saving certificate:

The 12cm insulation under the base plate is not present in “Layer structure and U-values of the components used (p.40), but it is included in the thermal bridge calculation (p.11). How is the U-value of 0.164 for the floor area (p.2) derived? With the U-value from the thermal bridge calculation for the basement floor (p.11) of 0.183 or with the U-value of 0.365 multiplied by a factor of 0.4-0.5? How is this normally handled? The U-value of the layer structure and the U-value of the thermal bridge calculation should be identical.
See Keller.pdf or entire energy saving certificate.

The wall structure is without concept

can you explain that in more detail?

I got myself the trial version of the Rowa software.
The 0.164 (floor area, page 2) is the U-value 0.365 of the basement floor (page 40) multiplied by the factor 0.45. So no perimeter insulation under the slab was included in this calculation, but it was in the thermal bridge calculation (page 11).

What also seems strange to me is the floor perimeter of 85.0m (page 8). The floor perimeter should only be 38.5m (with 10.5x8.75m). Or is this calculated differently? Maybe someone can briefly explain this to me. Thanks

In the meantime, there is news and it has been calculated which U-values are necessary to achieve KfW40. Specifically, the U-value of the exterior wall should now be 0.11 W/m²K. However, in the calculation, the studs were enlarged and filled with Thermofibre "Wand_Thermofibre.pdf". The other idea is to double the exterior wood fiber insulation boards to 120mm. Which wall construction is now better, or what advantages or disadvantages arise here? The original wall construction + 120mm wood fiber insulation boards seems to be the easiest to implement and accordingly cheaper. Or is there something against "Wand_120.pdf"? Thank you

Oh man, who came up with that? This is botched times 10, leading to the question: what kind of amateur acting troupe are you working with?