Just a comment....We just moved here from AZ, where the sun produces ALOT of heat in the attic. The house we bought there had the foil radiant barrior, which we thought was a good idea....until we moved in and started having cell phone reception issues. The foil blocks the signal, and we constantly missed incoming calls. Outside it was fine, inside very poor. Just a note to anyone before you decide to have foil placed in your attic over the house.
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