DERBIBOARD 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. A tapered system is also available; designed to provide a
positive slope to roof drains. Product comes in a variety of thicknesses with
a wide range of ‘R’ values.
C1289, Type II, Class 1, Grade 2 (20 psi) or Grade 3 (25 psi)