As far as i remember NPower's website had a link, took you to somewhere else where you agreed to pay £1 per roll, thats the big roll not little ones. I needed 13 so ordered more at that price. This was earlier this year but i cant remember exactly, might be worth looking to see if its still on.
The TRC thread with a link to NPower - http://www.therevcounter.co.uk/general...n-for-1-a.html
Unfortunately the NPower site says they are not doing the offer at the moment. Might be worth a Google on other companies though, I know British Gas were doing something similar for a while.
It was even worth exporting at those prices - chez nous is full of it,
Crikey, forgotten i had seen it on here in the first place. Seem to remember a lot of people went for it including most off my staff at the time.
I also have a number of rolls of the 170mm thick insulation, Gloucester collection if anyone wants it.
Or contact your energy supplier - Free Insulation - Home Insulation - British Gas
I did most of mine with the £1 a roll deal from B&Q, I really must finish the last two sections, I was in Gloucester last week, but the rolls wouldn't have fitted on the bike