Products / Styrofoam Brand Deckmate Plus FA XPS Insulation

Styrofoam Brand Deckmate Plus FA is a closed-cell extruded polystyrene (XPS) roof insulation made for fully adhered roofing systems, with a planed surface and shiplap edges, for new construction and re-roofing. The product information sheet prints R-5.0 per inch at 75 degrees F, 25 psi minimum compressive strength, 50 psi flexural strength, 0.1 percent maximum water absorption and 1.5 perm maximum permeance, in 24 by 96 inch boards 2 and 3 inches thick, and lists Factory Mutual approval, ICC-ES ESR-4755 and UL Classification Certificate D-360. The product page's size table calls the edge 'Square Edge' while its description says shiplap, and its test table is headed with the plain Deckmate Plus name; DuPont's low-slope roofing brochure says Deckmate Plus FA is a custom order item.