Count on IKO for the best in polyiso. IKOTherm™ polyisocyanurate roofing insulation is constructed from a closed cell polyisocyanurate foam core bonded on each side to glass fiber reinforced kraft facers during the manufacturing process. IKOTherm III is coated with fiberglass facers during manufacturing. Strong and durable, IKO’s polyiso thermal insulation adds to the R value of a roofing system, offers excellent compressive strength and performs well in fire tests. IKO AccuCut™ is our new service of custom-cutting polyisocyanurate insulation sheathing at the plant to specified sizes, while creating straight and clean edges that make installation easier.