With an air gap and air circulation, that's practical. But, the "idiot" poster proposed cutting the foam board into strips and packing it up against the roof.
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14 years ago
Hot Porch Roof
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14 years ago
Home Depot. 'Henry's Solarflex 287 SF'. Comes in a 5 gallon can. I don't remember the price. I painted my 20' x20' black asphalt shingle sunroom roof with it 2 years ago. It made a hell of a difference in the inside temps. Well, maybe 'hell' is the wrong word. :-) The roof is still white 2 years later.