Products / WeatherBond XFP Polyiso

A rigid roof insulation panel with a closed-cell polyisocyanurate foam core bonded to coated glass facers, with ReadyFlash dark and light facers for adhesive flash-off control, offered in 4 by 4 and 4 by 8 foot panels from 1/2 to 4 inches thick and as Tapered XFP in slopes from 1/16 to 1/2 inch per foot. The bulletin says it achieves a UL Class A combustible deck rating at 1 inch without a fire-rated slip sheet or gypsum cover board at slopes up to 1/2 inch in 12, and lists ASTM C1289 Type II, Grade 2 (20 psi) and Grade 3 (25 psi), and IBC Section 2603.