Price difference between brick and calcium silicate stone with ETICS

Hello everyone,

we have a fixed-price new construction offer for a single-family house with approx. 135 sqm. We have to choose between 36.5 cm brick with Lambda 0.10 and sand-lime brick with ETICS. The brick costs over €8000 more in total. The house is located in a quiet neighborhood. We are currently having a hard time making the choice. How would you decide?

Take what the contractor normally builds with and has more experience with. In case of a price difference, with a strong tendency towards calcium silicate brick plus [WDVS].

Warning: The discussion tends to become very emotional, as it is highly prejudiced.

Are both variants energetically the same??

How thick is the wall, generates more living space?

How thick is the wall, does it create more living space?

Yes, they are. Both 36.5 cm. Sand-lime brick 17.5 cm + 20 cm ETICS made of polystyrene

Well, it is a clear defensive offer, the offered bricks are energetically worse and actually cheaper than the KS variant.