> Are these walls insulated? As far as I know, no. But the brick most used here is a lightweight perforated brick (a quick web search found a site with some pi

> Are these walls insulated? As far as I know, no. But the brick most used here is a lightweight perforated brick (a quick web search found a site with some pictures: https://portalvidalivre.com/articles/949 https://portalvidalivre.com/articles/949), and I believe the air trapped within it does have some insulating properties. > It requires more planning for passing electical and plumbing conduits. Not as much as you'd think. The way I've seen it done is: first you put the bricks as normal, then you dig a trench in it for the conduit, put the conduit, and fill the rest of the hole with brick fragments and mortar.