This type is called autoclaved aerated concrete. https://en.wikipedia.org/wiki/Autoclaved_aerated_concrete https://en.wikipedia.org/wiki/Autoclaved_aerated_con

This type is called autoclaved aerated concrete. https://en.wikipedia.org/wiki/Autoclaved_aerated_concrete https://en.wikipedia.org/wiki/Autoclaved_aerated_concrete It's pretty good but it's also brittle. You have to use special screws and wall plugs if you want to attach something.