KfW70 single-family house: Masonry T10 or T9??

Hello,

I have now seen frightening numbers: with a T10 at 36.5 thickness you will never reach the Energy Saving Ordinance 2009 standard, let alone KfW70. With the T9 you just about reach the Energy Saving Ordinance 2009.

I only believe statistics that I have falsified myself So "what" did you "where" read?

I have already written here several times that a 36.5 masonry (aerated concrete) with appropriate technology in the house leads very comfortably to a KfW 70 efficiency house => attachment

For me this means either thinner walls + plastic stuff on the outside or building double-shell. Both significantly more expensive and thus not affordable. House building goodbye...?

Obviously someone has unsettled you very much.

I don't know with whom you want to build: for example, I offer my interested parties both the hollow brick with ETICS and the aerated concrete without additional insulation at the same price. I see no reason why other seriouly calculating providers should make a distinction here, as both variants are roughly balanced regarding the total costs of the exterior masonry.

Best regards

Hello,

....e.g. double roof insulation....

With all due respect - that is nonsense and has nothing to do with the requirements of a KfW 70 energy-efficient house. Double insulation in the attic is at most a consequence of the development plan regarding soundproofing regulations for the property.

Kind regards