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R6 polyiso insulation in curb and cover help to reduce energy costs. Curb and cover are constructed of 11 gauge weather-resistant, mill finish aluminum, 18 gauge cover liner and continuous EPDM gasket.   Counterbalanced springs and locking hold-open arm allow single-handed operation of cover so that operator can maintain 3 points of contact with ladder.  The indented Diamond Grip&#8482; design secures the roofing membrane and backer rod for easier installation. Hardware is zinc-plated  including inside and outside handles and padlock hasps.  Tested to 50 psf wind uplift

JL Industries Diamond Series Aluminum Roof Hatch - 30&quot; W x 54&quot; L

JLIndustries&#174; Diamond Series Aluminum Roof Hatch - 30"W x 54"L 

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