| The primary reason that your garage gets so hot in the summer is that radiant heat from the sun enters the garage and is trapped inside. Up to 93 percent of heat gain in a building comes in through the roof. As warm air rises, 50-80 percent of heat loss is also through the roof. These extremes can make an un-insulated garage either uncomfortably cold or uncomfortably hot.
Reflective insulation is the right answer for your garage to stay cool in summer and warm in winter. Reflective insulation will reflect 97 percent of radiant heat gain. It also will function as an air barrier, preventing warm air from reaching the cold exterior of the garage wall thereby preventing condensation.
Example Temperatures in an Un-Insulated Garage
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