On Sun, 28 Feb 2010 04:56:39 -0800 (PST), harry wrote:


When I visited the USA a couple of years ago (I'm from the UK) I took
the opportunity to look round a few domestic house construction site.

Where did you visit? Much of the U.S. doesn't need much insulation.
I bet if you visited a recent minnisota house, you'd find insulation superior
to any brit house. Their requirements dwarf yours.