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B. Mule -Hide accepted roof insulations shall be secured to the roof deck in accordance with <br /> Mule- Hide's requirements utilizing Mule -Hide fasteners or approved compatible fasteners. <br /> When more than one layer of insulation is to be used, succeeding layers are to be laid <br /> staggered in relation to the previous layer of insulation and all joints shall be staggered. <br /> All layers may be fastened as a single layer with one fastener. It is not required that each <br /> layer be individually attached. <br /> C. All roof insulation shall be neatly cut to fit around all penetrations and projections with a <br /> maximum allowable gap of 1/4 ". <br /> D. Open joints greater than 1/4" wide shall be repaired with like insulation material. <br /> E. Insulation shall be tapered to provide a sump area a minimum of 36" x 36" where <br /> possible at all drains. <br /> F. Install no more roof insulation in one day than can be covered with the Mule -Hide PVC <br /> Membrane or when the onset of inclement weather is anticipated. <br /> G. Insulation installed over steel decks shall be checked so that no edges are left <br /> unsupported along the flutes. All insulations shall be of sufficient thickness and density to <br /> prevent breakage under normal roof construction or maintenance traffic. <br /> H. Tapered insulation shall be installed in accordance with tapered fabricator's shop <br /> drawings. <br /> 3.07 Membrane Installation <br /> A. General - Unroll the Mule -Hide PVC Membrane and position without stretching. Allow the <br /> membrane to relax at least 15 minutes when the temperature is above 60 °F, or 30 <br /> minutes when the temperature is below 60 °F, prior to installation. Inspect and remove <br /> any damaged membrane. Lap sheets a minimum of 5 ", for In -Lap fastening, leaving <br /> space for mechanical fasteners and plates and space for a 1 -1/2" minimum weld. <br /> Membrane overlaps shall be shingled with the flow of water. <br /> B. In-Lap Fastening <br /> 1. Perimeter and comer areas - When installing Mule -Hide PVC Roofing, install a <br /> minimum of one (1) Perimeter Sheet (1/2 width sheet) parallel with the perimeter <br /> and fastened with Mule -Hide approved fastening system at the predetermined <br /> spacing in the lap area in a line centered approximately 1 -1/2" from the edge of <br /> the sheet leaving 2" of membrane outside the disc. Weld lap area continuously <br /> with a minimum weld width of 1 -1/2 inches. <br /> Perimeter areas shall be determined by one of the following methods: <br /> a. 1 /10th the lesserplan dimension <br /> or <br /> b. 4 /10th the eave height <br /> Whichever is the lesser may be used. <br /> Corner areas are defined as the intersection of two perimeter areas. <br /> Perimeter sheets are required to be installed in all perimeter and comer areas. <br /> Spacing of the rows of fasteners in the perimeter areas shall be reduced to 60% <br /> of the spacing of the rows of fasteners in the field sheets. Spacing of the <br /> fasteners in the seam shall remain the same distance apart as the spacing of the <br /> 11 <br />