Building with different stones than in approval planning and structural analysis

Great, that's exactly how our energy consultant and structural engineer answered me.

Yes, that's how it goes: ask a forum, and one of the answers will be what you want to hear ;)

If the wall thickness, strength class, and thermal conductivity are the same or better, in my opinion this should be possible without static calculations or a new thermal protection calculation. Usually, the documents state "or equivalent".

Is this achievable when switching from Poroton to Ytong?

Can you manage that when switching from Poroton to Ytong?

I don't know. I know the one just as little as the other.

I don't know. I know one just as little as the other.

Me neither. Since I initially wavered between the two building materials (or rather two shell builders / leaned less towards the stone) in the planning of our construction and at least know one concrete comparison, I at least raise a skeptical eyebrow. ;)

I would at least also consider the density.

Poroton and Ytong, that is aerated concrete, are two stones with different properties. It must have been quite a load from the truck that made you suddenly want to switch. That might also be a company philosophy ;)