Products / Derbiboard

Derbiboard is a polyisocyanurate roof insulation board with a foam core bonded to non-asphaltic fiber-reinforced organic felt facers, offered in a range of thicknesses and as a tapered system for positive slope to drains. The data sheet states it meets ASTM C1289, Type II, Class 1, Grade 2 (20 psi) or Grade 3 (25 psi), and lists UL 790 (ASTM E108) roofing systems, UL 263 classification, FM 4450/4470 approval and Miami-Dade County approval. It is mechanically attached or set in low-rise foam adhesive or hot bitumen, with boards no larger than 4 ft by 4 ft for adhesive or bitumen attachment.