Quote:
Originally Posted by Piwoslaw
I glued aluminum foil to a piece of cardboard and put it put under the solar roof.
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Great idea.
I'd use radiant barrier, as the composition has a much higher reflectivity and lower emmissivity than aluminum foil. Plus I'd put the foil on the bottom of the cardboard, as well as the top. Radiant barrier double bubble foil, or foil tape might work with it too.
I wonder if the glass can be replaced with something opaque?