Roofing Underlayment
ESP Low-E Therma Sheet, an easy-to-install reflective insulation, offers an industry-leading thermal and moisture barrier. Therma Sheet has also earned ICC-ES certification — a critical designation that affirms that the product meets the code requirements of a stand-alone roofing underlayment. Previously, code required the installation of Therma Sheet over a layer of felt paper or other underlayment. Now, roofers can install high-performance Therma Sheet without any other underlayment, reducing labor and material costs. It is available in both 1/4-inch and 1/8-inch thicknesses to provide an excellent thermal and moisture barrier under metal roofing, stone coated steel, concrete, clay tile and more. Therma Sheet is constructed of 99 percent pure polished aluminum facings, heat laminated to a closed cell polyethylene foam core — a patented process that offers superior insulation performance. Another option you could look into if you want to insulate your house fully is something like spray foam roof. This creates a permanent barrier to heat loss and air entry. Once the foam is in, it doesn’t degrade and it is also mold and moisture resistant. For anything, it is always best to do your research before going ahead with anything.