Yes, good point DD, trying to maintain a helium vacuum between two doors, using a couple of ballons and a bicycle pump may be a challenge?
Do you think grants will be available?
I am willing to be a show house?
Going to make sense to go the expensive option, I have no doubt about ARC's expertise but, the prices they quoted last time were high (170k++ thar wasn't Double glazed!) as Billy mentioned they don't give a dam if they get your business or not! which means no discount!
There has to be room in this town for a reasonable replacement window company charging "fair" prices?

Quote Originally Posted by dirtydog
Dont forget glass is not a good insulator, it's the stuff between the panes that insulates, also tinted glass absorbs more heat.