ii had a 30x50 with 12' walls and 16'ish at the peak wood fram and metal siding. I used the prodex from the link.
I I stapled it floor to ceiling and taped the seams with foil tape.
I think it helped somewhat with keeping the mid day Houston heat out, but it certainly cut down on the drafts through the metal siding,.but if I were to do it again, and could afford it, I would use the bat insulation.
it for sure brightened it up inside though!
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