Steve Firth wrote:
The Natural Philosopher wrote:
Not quite. The best insulator is a vacuum. It's just nobody has found a
way of encasing a building in it yet, though I'm sure Doctor Dickhead/IMM
will detail some place where it's been done.
Ok the best COMERCIALLY AVAILABLE insulation material...ok?
Umm no, you can buy a vacuum as an insulator commercially. Thermos.

Ah yes, how to build a gerbil house that complies with Part L in 2020

Owain