/diy/ - Do It Yourself

>>1443598
>but it strikes me as a modern method
I know older homes didn't put insulation between them, or just less, but cavity walls have been used for decades. I haven't really heard of any brick houses being build without them.

Again, I'm not an expert but our climate is moderate but recommended thickness of insulation is somewhere between 10-16 cm, even going as far as 20 for "passive" houses. But I guess it depends on the materials used. Double paned windows are pretty much a must.

>>1443601
The outer brick wall lets the moisture through so that's why we need a cavity.