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The roof system is formed of a corrugated sheet of material anchored to a roof beam, a mineral board anchored to the peaks of the corrugated sheet having a moisture barrier, at least one layer of insulating material interposed between the mineral board and the corrugated sheet, and standing seam met

The roof system is formed of a corrugated sheet of material anchored to a roof beam, a mineral board anchored to the peaks of the corrugated sheet having a moisture barrier, at least one layer of insulating material interposed between the mineral board and the corrugated sheet, and standing seam metal roof panels anchored to the mineral board. A staggered anchoring system is provided which eliminates thermal shorts from the outside of the roof to the inside roof beams.

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A roof deck assembly comprising: (a) spaced horizontally disposed roof beams; (b) a corrugated sheet of material, said corrugated sheet having a plurality of spaced ribs alternating above the neutral axis forming compression ribs and below the neutral axis forming tension ribs, said spaced ribs exte

A roof deck assembly comprising: (a) spaced horizontally disposed roof beams; (b) a corrugated sheet of material, said corrugated sheet having a plurality of spaced ribs alternating above the neutral axis forming compression ribs and below the neutral axis forming tension ribs, said spaced ribs extending longitudinally of said corrugated sheet and said corrugated sheet being supported on said roof beams; (c) a layer of insulation superposed over said corrugated sheet; (d) a sheet of mineral board overlaying said layer of insulation, said mineral board having a top surface and a back surface, said back surface extending toward said layer of insulation; (e) a means to secure said mineral board to said compression ribs, said means having a longitudinal extent extending through said layer of insulation and capturing said insulation layer between said mineral board and said corrugated sheet; (f) an exterior roofing layer overlaying said mineral board; (g) a means to anchor said exterior roofing layer to said mineral board, said means to anchor including a fastener retention device spaced apart from said means to secure said mineral board to said compression ribs in a direction generally orthogonal to said longitudinal extent; and (h) a moisture barrier layer interposed between said exterior roofing layer and said mineral board, said moisture barrier layer in combination with said fastener retention device forming a staggered anchorage system which eliminates thermal shorts between said means to secure said mineral board to said compression ribs and said exterior roofing layer.