It's made with modified expanded polystyrene; a rigid, foamed plastic with resilient closed cells. The benefits include permanent R-value, inherent water resistance, excellent physical strength and dimensional stability. The high R-value at a comparatively low cost makes it a perfect insulation choice for the roof, perimeter, cold storage, exterior and cavity wall insulation. Energy efficient expanded polystyrene (EPS) R-value approximately 4 per in.
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