Heat reflective roofing materials
So, since I need a new roof this year for my 1.5 story Minneapolis Bungalow, I would like to consider materials that would reduce the heat gain on my upstairs during the day. I am going to be looking into adding 2″ of polyiso over the roof deck, but that may or may not happen based on cost.
However, I understand that some materials are energy star rated for reducing the cooling load. Steel, which may be too expensive, and some shingles.
Based on the manufacture web sites, these special shingles do not appear to be normally available in MN (usually AZ, CA, etc). Is there any reason NOT to use these shingles in MN?