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Originally Posted by willravel
No, that's a good question. I'm not sure about how the application of different paint finishes may effect thermodynamics, but it's entirely possible that flat paint may absorb heat while semi-gloss could reflect it.
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I had in mind something more like metallic paint, like they put on the roofs of trailer houses

. Actually, a cursory google search turned this up:
http://www.wisegeek.com/what-are-ref...f-coatings.htm
Judging by the googlemaps image of our house, the part of our roof that is flat is not shingled but is white-ish may already be coated with reflective paint, but maybe we can upgrade it or something.
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That'd be boss. What I would do is get a ladder and install some way to open them from the ground. Many higher windows have sticks or ropes attached to the in order to open them from the ground. I don't know what kind of windows you have, so I don't know for sure if that will work.
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The windows have little loops on them for pulling them open (presumably with a really long pole with a hook on it? They're a good 8-10 feet from the floor) but when the previous owners updated the HVAC they ran the ductwork around the clerestory just under the windows, so there's this big ledge (through which the ductwork runs) kind of in the way.
http://flickr.com/photos/29425092@N0...in/set-645316/
However, this seems like just the kind of jerry-rigging engineering job I like to throw my brain at. Thanks for the idea!