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<br />073113.7 – ASPHALT SHINGLED ROOF SYSTEM <br /> <br />Project Manual for Motor Pool Main Building Roof Replacement <br />Orange County, Hillsborough, NC <br />Prepared by Atlas Engineering, Inc., 551-A Pylon Drive – Raleigh, NC 27606 <br />August 2021 <br /> <br /> <br />3.03 UNDERLAYMENT INSTALLATION <br /> <br />A. Install one layer of self-adhering underlayment perpendicular to slope of roof at the eaves(parallel <br />to the eaves), and lap a minimum of 6" at end laps. The underlayment should extend a minimum <br />of 30" onto the roof surface. Also install self-adhered underlayment along rake edges, ridges, <br />penetrations, and transitions where indicated on the detail drawings. Turn down perimeter and <br />underlayment to cover exterior face of wood blocking. Press down all laps with a roller to assure <br />immediate adhesion. Install one layer along ridge and roof penetrations, in accordance with the <br />drawings. <br /> <br />B. Install synthetic underlayment over the remainder of the roof overlapping the self-adhered <br />underlayment a minimum of 6". Underlayment should be installed flush over the roof deck <br />without wrinkles, gaps, or buckles. Although it is preferred that only roof that can be shingled in <br />a day is removed, in the event that the underlayment is exposed overnight, moisture from dew <br />should be allowed to completely dry before shingle installation. <br /> <br />C. Cracked, wrinkled, torn, or otherwise damaged underlayment (both self-adhering and synthetic) <br />will not be accepted and will require removal and replacement. In no event will underlayment be <br />allowed to remain exposed to UV for more than 21 days. Prior to roofing over the underlayment, <br />inspect for damage and replace or recover any worn or torn areas. <br /> <br />D. Take special care if applying self-adhering waterproof underlayment when ambient or wind chill <br />temperature is below 45 °F (7 °C). Fasten/tack the underlayment in place and seal laps with a <br />heat gun or a polymer-modified cement if immediate adhesion to the deck does not occur. If <br />fastened, use hand-driven roofing nails, staples and pneumatic nailing will not be accepted. <br /> <br />3.04 SHINGLE INSTALLATION <br /> <br />A. Measure and chalk vertical and horizontal lines to layout the shingle installation and maintain <br />even spacings and consistent exposures. Watch for irregularities in the existing roof deck that <br />may require repair or replacement of deck prior to shingle installation to prevent irregularity from <br />showing through the shingled system. <br /> <br />B. Install shingles in accordance with manufacturer's instructions for product type and application <br />specified and the detail drawings. <br /> <br />C. Fasten each full and trimmed shingle with a minimum of 6 nails at proper locations on shingle at <br />locations recommended by the manufacturer. Fasteners must be hand-driven straight, with nail <br />heads flush with the shingle surface and never cutting into the shingle. Use of staples and <br />pneumatic nailers are not accepted. <br /> <br />D. Begin shingle installation with the manufacturer recommended starter course at the eave. The <br />starter strip should overhang the eave a minimum of 1/2" where a drip edge is not provided. <br /> <br />E. Install following full course to fully cover the starter course. Properly stagger and align the <br />succeeding shingle courses working up the roof from the eave as recommended by the <br />DocuSign Envelope ID: 9514E4EC-C3C9-4752-8A7F-22E83B22BB8E