DERBIBOARD Tapered is a high performance polyisocyanurate insulation board designed to provide a clean, strong base for a variety of roofing systems. The polyiso foam has superior fire resistance as well as the ability to retain high ‘R’ values. The foam core is integrally bonded to non-asphaltic fiber-reinforced organic felt facers for added strength and dimensional stability. DERBIBOARD Tapered offers in a variety of slopes to achieve positive drainage to prevent ponding as well as long term thermal resistance.
C1289, Type II, Class 1, Grade 2 (20 psi) or Grade 3 (25 ps