ᐅ Solid Wall House: Which Type of Block? Poroton, Liapor / Expanded Clay, Ytong?

OK, I overlooked the fact that it’s a double-shell with clinker brick and aerated concrete (I thought it was single-shell aerated concrete). If done correctly, that’s not a bad approach. For sound insulation, you can build the interior walls with sand-lime brick while the exterior still has the facing brick. And you don’t often hang cabinets on the outside wall anyway. Is it just aerated concrete, or aerated concrete plus mineral wool? And was there a specific reason for only 16cm (6 inches) of mineral wool on the sand-lime brick? I thought there are now anchors that allow you to exceed the typical 16cm (6 inches) cavity spacing…

They do exist, but they tend to be more expensive and somewhat uncommon – plus, the wall is already 47 cm (19 inches) thick.

I think it also partly depends on the habits of our planner and the construction supervisor. The U-values are still relatively good – with aerated concrete, even better than KfW55 from the main contractor using calcium silicate bricks, with 0.2 W/m²K still acceptable. I’m curious to see what our planner will announce on Thursday, whether KfW55 can be achieved without aerated concrete (in that case, we would choose calcium silicate bricks).

I vaguely remember that it is best to stick to one type of brick and not to use various kinds.

With aerated concrete and sand-lime brick, this does not seem to be much of an issue – we were offered a lot of options.

We were advised against it.
I assume that for you, it is primarily about Ytong as an insulation block and sand-lime brick for soundproofing, right?

EveundGerd schrieb:
We were advised against it.

Was that specifically the combination of aerated concrete/calcium silicate bricks or masonry combinations in general?