Poroton (36.5 cm) versus lightweight expanded clay aggregate solid wall (41 cm)

I have the thesis that everything must fit together ... we have a roof with 45 dB, wall with 40 dB, and window with 32 dB ... that was nonsense because at 32 dB, despite a quiet new development area, children etc. are clearly audible ... A window was replaced with 40 dB, big difference ...

I think relying on the architects / developers / GUs is wrong ... then we would have no controlled residential ventilation (no need to do that, we never do) and PUR insulation in the roof above (we are not at the airport ...) ... and we would be very frustrated ... the GU almost always prefers to build with unfilled bricks, from the others a lot falls out ... that helps me nooooot at all that he always builds with that ... you have to inform yourself and everything should fit together ...

Unfortunately, I also don't think asking the neighbors is appropriate ... who admits that what they chose wasn't the best ... very few ...

After all, no one has any serious problems in / with the house .... and then the neighbor empties the dehumidifier outside again ...

The fact is that aerated concrete alone insulates sound worse than other construction types.

The fact is that decades of experience from several buildings count less than if something on the internet says a table claimed stone X is good and stone Y is bad. I always gladly let myself be accused of being stubborn when it comes to thinking for myself.

The developer, however, uses 30 cm Ytong as standard, checked, Ytong disadvantage: poor sound insulation

For this reason, we decided on a developer who offers double-shell masonry with Poroton. Ytong has good thermal insulation properties and is easy to work with. But that’s where the advantages end.

we also initially decided on expanded clay for us, and after a factory visit to the manufacturer, we chose a construction company from their reference list, the construction company only builds with expanded clay and everything went smoothly, the shell stands (without cracks), without controlled residential ventilation
Regards Nida

Expanded clay is actually a super interesting building material. I also looked into it and visited Lechner Massivhaus on site (called KlimaPOR there). In many aspects, expanded clay also has good properties, e.g. sound insulation. One disadvantage is that you have to combine it with Styrofoam insulation to achieve a KfW55 or even KfW40 standard (if that is desired). Or you just build the wall extremely thick. That was the statement from the sales consultant.

If KfW55 or higher is the goal, a Poroton (filled or unfilled) would probably be the better choice.

I am well known to live in a pumice area, Bisotherm is also very popular here (monolithic as far as I know without oversized wall thicknesses).