Orange County NC Website
Browse       Search
<br />076200.7 – FLASHING AND SHEET METAL <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 />Sealant installation at such transitions is acceptable, but shall not constitute the sole/main <br />waterproofing component of the component. <br /> <br />F. Sheet metal flashing shall be fabricated and installed to allow for expansion and contraction of <br />the component materials without buckling, hole elongation, fastener failure, or excess stress <br />loading situations developing at any time during the temperature cycle. Cleats, brackets, and <br />clips shall be designed and installed to resist rotation and to avoid shear stress when roofing <br />materials expand and contract. <br /> <br />PART 3 EXECUTION <br /> <br />3.01 SURFACE CONDITIONS AND PREPARATION <br /> <br />A. Inspect wood blocking to verify that it is clean, smooth, free of depressions, waves, or projections <br />and solidly supported over joints. <br /> <br />B. Verify that roof openings, pipes, sleeves or vents through roof are solidly set. <br /> <br />C. Verify installation of all appropriate base and cap flashings have been completed prior to <br />installation of sheet metal. <br /> <br />3.02 INSTALLATION - GENERAL <br /> <br />A. Form and install roof system flashings in accordance with the detail drawings. <br /> <br />B. Dissimilar metals shall be kept separated to prevent galvanic action. Preventive measures shall <br />include separation by suitable bituminous paint, underlayment, or other non-conductive <br />separation membrane acceptable to the Designer. <br /> <br />C. Exposed edges of sheet metal shall be folded back, or "hemmed" ½”, on concealed surfaces. <br /> <br />D. Finish sheet metal watertight and weathertight. Lock seams and end joints. Fit flashings tight in- <br />place. Make corners square, surfaces true, and plane surfaces free from warps and buckles. Do <br />not bend flashing around corners or cut/split hemmed edge at outside corners. Corners must be <br />tightly mitered. <br /> <br />E. Make seams and joints lap in the direction of water flow. Where end laps/seams do not have a <br />separate joint cover, lap a minimum of 4 inches. <br /> <br />F. Install new wall panel and soffit support framing where shown on the detail drawings. Inspect <br />existing support framing at isolated locations where it is noted for reuse and make minor <br />modifications/adjustments if needed for proper installation. Install wall panels and soffit panels <br />over support framing in accordance with the manufacturer’s installation instructions. Concealed <br />fasteners shall be used to secure each panel section to the framing. Panels must be installed <br />without crowning, or poor fit causing oil canning or stresses. Damaged/dented panels will not <br />be accepted and should be replaced immediately if damaged during installation. Vertical joints <br />in the panels must be installed plumb and may not vary more than 1/16” over 4 feet. Panel <br />DocuSign Envelope ID: 9514E4EC-C3C9-4752-8A7F-22E83B22BB8E