Products / IB Energy Board III

IB Energy Board III is polyisocyanurate roof insulation with a closed-cell foam core bonded to inorganic coated glass facers containing no cellulose, in 4 x 4 ft and 4 x 8 ft panels with LTTR values from 5.7 to 26.8 depending on thickness. It is offered at 20 psi (Grade 2) or 25 psi (Grade 3) under ASTM C1289 Type II Class 2. The TDS lists FM 4450/4470 approval, Miami-Dade County and Florida (FL2534) approvals, and UL 263, UL 790, UL 1256 and UL 1897 classifications. A tapered version, IB Energy Board III Tapered, is published on its own TDS in 4 x 4 ft panels at 1/8, 1/4 and 1/2 inch per foot slope.