HeavyGUARD PMR roof panels combine insulation and ballast to protect the waterproof membrane from hail, wind, UV, thermal cycling and more. Panels are composed of Dupont Styrofoam® extruded polystyrene insulation with a 15/16-inch latex-modified concrete topping on a 2' x 4' tongue-and-groove panel, weighing 11 lb. per square foot per panel.
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