Atlas Roofing Corp. has developed ACFoam-IV polyiso roof insulation. It is stable and does not cup, warp or shrink under normal installation conditions. It is a closed-cell polyiso foam core integrally laminated to durable, dimensionally stable coated glass facers. The insulation provides long-term thermal resistance values from 6 to 25. Cover boards aren’t needed in corners and perimeter areas to meet wind uplift requirements for hurricane zones.

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