I just finished an attached garage reno. We made sure to put R40 at least in the attic space. The main house is lucky if it has R15. The main house was 28 deg yesterday and the garage was a bearable 24 deg. Want to save money on air con and help the tanks? Way cheaper in the long run to rent a blower and add more insulation to the attic..... That's what im doing next week. :-)
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