My friends are going to remodel the loft in their 1.5 storey home. They want to sell in the next couple of years, so this will be a DIY effort with minimal investment. I’ll be helping them.
The only insulation is fiberglass stuffed between 2×4 rafters. It’s completely black from filtering drafts for many decades. It seems worthless. The loft is definitely freezing cold in winter, and sweltering in summer.
What would you do? I’m not sure how much spray-foam would cost, but it’d probably be more than they want to spend. Any recommendations?