Yes, the bricks have holes in them, after building they are filled with air, which insulates. And often for the outer shell 2 walls are built with an "air" wall in between which used to be just air but now is filled with insulation materials.

[–] AwesomeLowlander@sh.itjust.works 3 points 2 weeks ago (1 children)

There are many parts of the world where insulation is not a concern at all when building.

[–] Bronzebeard@lemmy.zip 7 points 2 weeks ago (1 children)

Sure but they didn't make reply to a comment thread specifically about insulation...