18 or 24 Poroton exterior wall?

Good day forum community,

we have two construction companies in the running, building with Poroton and ETICS.
No.1 uses 18 cm bricks plus ETICS
No.2 uses 24 cm bricks plus ETICS

Now my question is, how big is the difference? Are there disadvantages with the 18 cm bricks? Or is the insulation stronger there?

Thank you!

Best regards

If there is a reinforced concrete ceiling on top of 18 cm aerated concrete, I wouldn't feel comfortable staying inside it.

It's about Poroton. Not aerated concrete.

Hi, there are many different Poroton bricks with different thermal and sound insulation properties. Therefore, precise information is missing to really tell you something. Just generally: for the 18 cm wall, simple hollow bricks are probably used, for the 24 cm wall, I guess T14 to T18 bricks. The thermal insulation is ultimately done by the [WDVS], the brick behind it is rather secondary for thermal insulation. But the hollow bricks will offer you better sound insulation, however, you can no longer hide downpipes in an 18 cm exterior wall. You will immediately have boxing-out. We have 24 cm T14 bricks with [WDVS]. If I were to build again today, I would choose 24 cm hollow bricks. They are cheaper and due to the higher mass, provide better sound insulation. Regards, Andreas

Thank you in advance for the answers. Unfortunately, I cannot specify the exact bricks. On one it says: "Hoclochziegel...manufactured according to the applicable guidelines. Wall thickness = 24cm." On the other "poroused Hoclochziegel." It would be once FIBAV and Heinz von Heiden. Best regards

It's about Poroton. Not aerated concrete.

Right, misread that once. Yes, it's something different there.