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We are in the process of building a new home with a metal roof. Home is 5000sq ft with a lot of pitches. We live in coastal SC with high heat and humidity. We are trying to decide on the best type of insulation and have been told many conflicting things. We originally were going to use open cell spray foam but have been told this is not a good option for our climate. We really wanted conditioned attic space but if closed cell is the correct application it is cost prohibitive. Regardless, we want to use the best option for the roof even if it means attic will not be conditioned. My question is what would that be? Also, is it possible to condition the attic space over the garage only.
If you use urethane spray foam, it should be closed cell. If there are separate attic areas, yes, you could do different things in different parts of the home.
Thanks Todd. if we chose not to go with spray foam, what would be the best type of insulation?
I'd really suggest connecting with a local insulation company who can help analyze what is best for your home. If your attic space is not conditioned, will you be able to have intake and exhaust vents?
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