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Old August 22, 2016   #5
zipcode
Tomatovillian™
 
Join Date: Jun 2010
Location: Romania/Germany , z 4-6
Posts: 1,582
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Styrofoam, like the one in packaging, is used around here to insulate buildings, so I assume it should help in your case too (wrapped after in the reflective thing). I think the problem is how well can you add it all around. If one side (up) remains without, I think the effect will not be that great.
Shade cloth will help more than you think.
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