If you are going to enclose your lanai, I would consider it. We insulated our garage doors and tinted the windows but no insulation in the garage ceiling. Guess I figured that heat rises, let it rise. The garage stays comfortable and allows me to do the painting and other things I need to do. Just my 2 cents worth. FWIW - I have an East facing garage.
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Doesn't matter what you drink, you only rent it...
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