I’m thinking about $20 per roll .yes it has foil on each side . We don’t seal the edges but that would probably help . I’m thinking it’s the same as a car windshield shade .Lowes is the only big box store we have .It comes in a couple different widths. 1/4 “ thickGreetings,
Mr.PM. Excellent idea. Foil both sides? Do you treat/seal the edges at all? How much and source please...