Quote:
Originally Posted by retiredguy123
Logically, adding insulation to the unconditioned lanai and garage ceilings should make your attic hotter, not cooler. The attic is usually hotter than the lanai and garage, and the insulation will slow down any heat transfer from the attic to the space below it. But, builders never insulate garage and lanai ceilings because it is considered to be mostly worthless. They only use insulation between conditioned and unconditioned spaces.
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We have a courtyard villa which had a minimally insulated attic above the garage. It was very hot in the garage. We had additional insulation installed (not blown in) and what an incredible difference.