In Latin America hollow brick is often used for walls. I'm not in the construction business, but I'm guessing it has to do with cost, insulation, and the ease o

In Latin America hollow brick is often used for walls. I'm not in the construction business, but I'm guessing it has to do with cost, insulation, and the ease of breaking in a crevice to lay conduit lines. If you want to install a line and there isn't a pre-existing conduit in the wall, you do have to chisel one in. It's definitely more effort than with a "hollow" wooden wall, but it's not terribly bad. > Look at small low-cost housing in Asia. Mini-split air conditioners and pipes all over the exterior. I'd attribute this to the "low-cost", not necessarily the "brick/concrete". I'd imagine in the USA houses would be pre-fitted with more conduit, and homeowners could afford the installation of more as needed.