Available in 2 versions, EnergyGuard™ High-Density Polyisocyanurate Cover Boards can be used as protective layer over boardstock insulation or as recover over existing roofing system. HD version, weighing 11 lb per 4 x 8 ft board, is ½ in. thick with R-value of 2.5 and compressive strength over 80 psi. HD PLUS version weighs 13 lb with durable coated glass facer and compressive strength over 110 psi.
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