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� . � must follow Factory Mutual's suggested guidelines. � The longest dimension of the insulation should run PARALLEL to the flutes of a steel deck and PERPENDICULAR to the direction in which the Mule-Hide field sheet will be unrolled. Regardless of the approved lay of the insulation board, the membrane field sheet direction must be proper with respect to the deck construction, as explained in "Installing Membrane - Field Sheet Membrane," be.low. Lay no more new insulation than will be covered by the roofing membrane on the same day. Work on ' any given area of the roof m ust be made completely watertight at the end of each workday. � Good roofing practice dictates that care can be taken to achieve smooth transitions between insulation 'I i boards and roof areas. Always consider proper drainage and adjust thickness to achieve. The � membrane should never have to bridge an area and transitions should never cause ponding. i Installing Membrane � Perimeter Half Sheet I i To ensure that your installation meets the Mule-Hide specifications, refer to Standard Details as you f read this section. � I CAUTION: Keep the protective packaging of the Mule-Hide Heat-Weld Membrane intact until ready to � use. I NOTE: Half-sheets are 40.5 in wide; field sheets are 81 in. wide. The field sheets must always be � installed perpendicular to steel deck flutes, plywood deck joints, or deck plank direction, ad appropriate. All field seams shall be shingled with the flow of water. � 1. Install the first perimeter half-sheet. Roll out the first half-sheet of inembrane along one edge of the work area. This edge should be arallel to the direction in which th �' p e field sheets wtll run. I, Overlap the fascia with one edge of the roll, extending the membrane over the edge of the roof, past where the clip for the metal fascia is to be fastened. Allow the membrane to relax at least 15 I' minutes prior to fastening, 30 minutes when temperatures are below 60°F. Fasten the membrane tot he vertical surface with corrosion-resistant ring shank cap nails (or other appropriate fastener when a nailer is not available) at 12 in O.C. NOTE: Face Nailing is not acceptable into less than nominal 2x (e.g., 2 x 6 in.) wood nailers. ' On the roof surface, note the position of the edge of the half-sheet, and then fold back the first half- I ' sheet until the folded edge is roughly even with the roof edge. il� �f 2. Install the second perimeter half-sheet. Unroll the second half-sheet roll of inembrane so that it i�, laps under the unfolded edge of the first half-sheet 5 inches. This will produce a 2 to 2-1/2 in. clear ! lap area for seam welding. As with the first sheet, allow the membrane to relax at least 15 minutes '� prior to fastening, 30 minutes when temperatures are below 60°F. Install the appropriate Mule- I � Hide fasteners in the second half-sheet at the spacing specified for the particular deck type, utilizing the "set-pattern" (blue markings spaced 6 in. apart) scribed on the membrane. If still in doubt about i fastener spacing or other aspects of this operation, consult your Mule-Hide technical Service � department. ;; NOTE: Consult Fastener Guidelines Section 5 for determination of " " I ( ) _ perimeter and fastener spacing. I 3. Fold back the unfastened edge of the second half-sheet. � Field Sheet Membrane �F C ;