What is the best way to reduce heat gain in South facing garages?
This forum has had a lot to say about how foil bubble radiant heat barriers are silly and a waste of money.
I’m interested in reducing the heat gain in my South facing garages from the intense high desert sun. My garage bakes, and my neighbors is quite cool and comfortable, for a garage. I know he has done attic ventilation above the garage, and installed a radiant heat barriers on the door.
I am inclined to follow his footsteps. But is there a better choice for the door? Heat retention in winter would be nice, suggesting foam board, but I can’t imagine I can get a good air seal around the door, and foil faced foam hardly allows much of an air space for radiant blocking.
If I should use foam, how thick? 2″ seems a bit heavy and bulky.
I don’t need perfect, and I don’t need R-18 like a proper insulated garage door, I just don’t want an oven, and the heat gain from the direct sun is immense.
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