Insulate your garage door and the ceiling above the garage and lanai. You will be surprised how much heat comes thru the metal garage doors, especially if the sun shines on them.
I recommend you hire someone to install the insulation or at least buy the precut insulation from RoMac that is designed for your specific garage doors. It is not terribly expensive!
I was amazed at the difference! At first I only insulated the double doors. The golf car door insulation was not available. You could feel the difference in the radiant heat from the two doors.
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