Revisions log for Answer #825

If you exclude the weak points – the windows – you need more weight for the walls. And also the ceiling (the roof).

Cellular concrete, unfortunately, is quite good at transmitting low-frequency noise from the street. My apartment in a low-rise building made of aerated concrete confirms this. If there are loud low-frequency sounds on the street, you can hear them if you lean your ear against the cellular concrete exterior wall or partitions. Of course, you can also hear it through the air in the apartment, but the windows of the cheapest builders are also there. The difference between the bulk densities of aerated concrete 400, 500 and 600 is not so great – it's all bad!