Well, down here at ~30N Lat, we use insulation, and foam board, to keep the heat OUT and cool IN!!!! This is the current price for 1/2" x 4' x 8' foam board at Lowe's, Gulfport, MS..... http://www.lowes.com/lowes/lkn?action=productDetail&productId=15348-46086-15348&lpage=none :tb-cool:
