I have come across this company that is offering insulation on line http://www.just-insulation.com/eshop.html
Never used them before but v competitive prices, free delivery to Eire ,any self builders out there had any dealings with them?
2. if this is a new build, you need to clear the type and actual product with your architect / engineer to ensure it complies with building regulations.
3. ensure what ever product you choose has a relavant IAB or BBA certificate for what you want to use it as.....
Agree with you on the multifoil, and i've calculated my u value and r .
Most of the products listed are by the big names Knauf Rockwool etc ,however the price difference is vgood.