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B. Tapered Insulation <br /> 1. Install tapered insulation system to provide positive slope for complete roof <br /> drainage. <br /> 2. Crickets shall be sized as shown in the Contract Drawings. Modifications shall <br /> be provided to ensure positive slope and prevent standing water along the cricket <br /> valley. <br /> a. Minimum length to width ratio shall be 2:1. Fabricate partial crickets <br /> with dimensions which would result in a minimum length to width ratio <br /> of 2:1 if they were extended to full size. <br /> b. Unless otherwise noted, fabricate all crickets from tapered stock as <br /> required to provide the specified minimum slope. For example, when <br /> roof slope is indicated as 1/4" per foot minimum, fabricate crickets with <br /> slope of 1/2"per foot minimum. <br /> c. Construct crickets on up slope side of all curbs to ensure positive <br /> drainage. <br /> d. Install tapered edge strips at cricket edges to provide a smooth transition <br /> between the cricket and insulation system below. <br /> 3. Insulation boards may require mechanical fasteners and stress plates at slope <br /> transition of crickets to minimize bridging. <br /> C. Roof Drainage: <br /> 1. Drainage sumps shall be installed as detailed. <br /> 2. The Contractor shall be responsible for carefully laying out the tapered <br /> insulation, sumps, drain bowls and scuppers to ensure the finished roof provides <br /> complete drainage with no standing water. <br /> 3. Contractor shall fabricate miter-cut sumps at scuppers to provide smooth <br /> transitions between the insulation system and the drains/scuppers. <br /> 4. Sumps shall ensure complete roof drainage and prevent water dams. <br /> 5. Contractor shall adjust insulation, drains and scuppers to ensure complete roof <br /> drainage and satisfactory substrates for membrane and flashings. <br /> 6. Drain sump components shall be fastened to the deck using specified insulation <br /> fasteners or adhesives. <br /> 7. Circular sumps and sumps that do not provide smooth transition or that create <br /> standing water at the drains shall be rejected and shall require removal and <br /> replacement. <br /> D. Insulation Mechanical Attachment <br /> 1. Fastener quantity and spacing shall be as indicated in the Contract Drawings. <br /> 2. Fasteners shall be installed using manufacturer's recommended equipment and in <br /> accordance with the manufacturer's requirements. <br /> 3. Fasteners and stress plates shall be set secure and tight against the insulation <br /> surface,and shall not be over-driven. <br /> 4. Fasteners shall engage the top flange of steel decks only. <br /> END OF SECTION 07 22 16 <br /> Sebastian Corners Roof Replacement 07 22 16-5 Roof Insulation <br />