Exterior walls 24cm hollow bricks: WDVS or Poroton T7?

It also depends on the civil engineer. For us, Poroton would have cost a few thousand euros more because the civil engineer installed KS 95% of the time and naturally wanted to charge a princely price for such a special request.

This is again one of those debates about beliefs. There is no perfect wall construction. All have their advantages and disadvantages. I would decide based on price and what the shell builder prefers to use. Unless you have requirements for soundproofing because you are building next to a highway...

Except if you have requirements for sound insulation because you are building near a highway...

Trust me, that has nothing to do with the highway. Screaming children, agricultural machinery, and construction noise also exist in the countryside. And even more sources of noise. In the city, it is often quieter...

We also have unfilled Poroton. Living in the countryside. Noise from outside usually comes in through open windows and doors.

If I had to decide again, I would choose filled Poroton. Mass + thermal insulation.

Personally, I would advise against ETICS. Also because I simply prefer to build "as simple as possible and as effective as necessary." Saves follow-up costs, installation + material costs, no solar radiation for the masonry...

What I forgot to mention, the unfilled Poroton have massive longitudinal sound. The ground floor and upper floor are very sensitive to noise. If you make a phone call on the ground floor, you can hear it upstairs. The stones are therefore prohibited in multi-family houses, but in single-family houses with children, it can also be very annoying. You just have to know how sensitive you are...

I don't think much of the stones, I built with them myself because almost everyone here builds with them. I wouldn't do it again.

Exterior walls masonry 24cm hollow brick: ETICS or Poroton T7?

I don't quite understand the headline: it would make sense if a porous brick with 24 cm wall thickness already met the energy saving ordinance monolithically, but I find that a bit hard to believe (?)