In doing some research on insulation for a new build some time ago, I came across a lot of bad-press/scepticism on multi-foil insulations. I was surprised then recently that a rep from an insulation company that came to look at our build, recommended insulating the roof using a multi-foil insulation - I think he called it Superquilt. Has anybody used this type of insulation? of so, how has it worked out?