Quote:
Originally Posted by slodave
It's a flat roof, no insulation inside. There are two show box sized vents at the bottom of one wall and about a 1/2 gap under the side door.
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Okay, I think I know what you mean. So when you're in the garage and look up, you see the joists and the plywood or OSB sheathing, right? No ceiling and your vent is installed up high on one of the walls?
Is the roof perfectly flat, or is it sloped slightly... aka a shed roof?
I've seen those low box vents like that in a garage that did have a ceiling with an uninsulated attic space above it, and the owner didn't have any way to get the hot air up and out of there... it was VERY HOT in there during summer.