ᐅ 24 cm Ytong blocks plus insulation or 36.5 cm Ytong blocks

Knallkörper schrieb:
ETICS is fine if it’s not enough for something proper.

In our case, aerated concrete was the cheapest option. But I would never use that stuff. Just build a cavity wall, then you don’t have to use those lightweight blocks and can use proper calcium silicate bricks instead. Not much more expensive either.

Tego12 schrieb:
For us, aerated concrete was the cheapest option. But I wouldn’t use that stuff. Just build with a double-wall system so you don’t have to use those low-quality blocks and can use proper sand-lime bricks instead. It’s not much more expensive.

Anyone who looks up the manufacturing processes of these two building materials on Google will probably find it amusing how some people praise one and demonize the other.

Aside from the difference between single- and double-wall construction, I think this comparison misses another important point: I would not use aerated concrete as an exposed material except in commercial construction, but rather with a render finish. For that, the more practical jumbo-sized blocks are often preferred. On the other hand, sand-lime bricks, in my opinion, are almost made to be used as exposed masonry. However, I find exposed masonry much more attractive when there is a finer pattern alternating between brick and mortar joint. This, in turn, rules out smooth-planed bricks with thin bed and dry joints. So ultimately, the comparison here is even jumbo blocks versus standard modular bricks (2DF).

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11ant schrieb:
So basically, this compares Jumbo versus 2DF.

That would only be if you followed your personal preferences. Otherwise, probably not.

Ok, my last comment was a bit provocative. My honest opinion: It doesn’t really matter what material you build with… once you’re living in the house, you don’t notice a difference (unless you have specific requirements, like a busy main road right outside—then aerated concrete might not be the best choice...). From the outside, you won’t see a difference if the building is plastered. Durability is almost the same (also with external thermal insulation composite systems, ETICS, even though many conspiracy theorists believe otherwise… the Fraunhofer study clearly states this, even showing advantages in facade durability with ETICS compared to aerated concrete due to fewer thermal bridges with ETICS...). My personal preference is for cavity wall construction, but it doesn’t make the house last any longer either. After 70–100 years, everything is so outdated anyway that rebuilding is usually cheaper than major renovation work (if you want to live in a house that is at least somewhat up-to-date)...