Products / Atlas ACFoam-III

Polyiso roof insulation board: a closed-cell polyisocyanurate foam core bonded on both sides to inorganic coated glass facers (CGF). Offered flat in 4 ft x 8 ft and 4 ft x 4 ft panels and tapered in 4 ft x 4 ft panels, with LTTR values from 5.7 (4.3 for tapered) to 26.8, at 20 psi (Grade 2) or 25 psi (Grade 3), with a non-halogenated formulation also offered. Manufactured to ASTM C1289 Type II, Class 2 and CAN/ULC 704.1. Used under built-up, modified bitumen, standing seam metal and single-ply roof systems in new and re-roof work; Atlas states it can be part of a UL Class A fire-rated deck assembly. Atlas backs it with a Limited 20-Year Thermal Warranty, a limited warranty on LTTR value.