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DSS Skills Development Center Smith Sinnett / 2020045 <br />Chapel Hill, North Carolina Orange County <br /> <br />PAINTING 09 91 00 - 8 <br />3. Provide finish coats that are compatible with primers used. <br />4. The number of coats and the film thickness required are the same regardless of the application <br />method. Do not apply succeeding coats until the previous coat has cured as recommended by the <br />manufacturer. Sand between applications where sanding is required to produce a smooth even <br />surface according to the manufacturer's directions. <br />5. Apply additional coats if undercoats, stains, or other conditions show through final coat of paint <br />until paint film is of uniform finish, color, and appearance. Give special attention to ensure that <br />surfaces, including edges, corners, crevices, welds, and exposed fasteners, receive a dry film <br />thickness equivalent to that of flat surfaces. <br />6. The term exposed surfaces includes areas visible when permanent or built-in fixtures, convector <br />covers, covers for finned tube radiation, grilles, and similar components are in place. Extend <br />coatings in these areas, as required, to maintain the system integrity and provide desired <br />protection. <br />7. Paint surfaces behind movable equipment and furniture the same as similar exposed surfaces. <br />Before the final installation of equipment, paint surfaces behind permanently fixed equipment or <br />furniture with prime coat only. <br />8. Paint interior surfaces of ducts, where visible through registers or grilles, with a flat, non-specular <br />black paint. <br />9. Paint back sides of access panels and removable or hinged covers to match exposed surfaces. <br />10. Finish exterior doors on tops, bottoms, and side edges same as exterior faces. Sand lightly <br />between each succeeding enamel or varnish coat. Omit primer on metal surfaces that have been <br />shop-primed and touch-up painted. <br />B. Scheduling Painting: Apply first coat to surfaces that have been cleaned, pretreated, or otherwise <br />prepared for painting as soon as practicable after preparation and before subsequent surface deterioration. <br />1. Allow sufficient time between successive coats to permit proper drying. Do not recoat until paint <br />has dried to where it feels firm, does not deform or feel sticky under moderate thumb pressure, and <br />where application of another coat of paint does not cause the undercoat to lift or lose adhesion. <br />3.5 PROCEDURES <br />A. Apply paints and coatings by brush, roller, spray, or other applicators according to the manufacturer's <br />directions. <br />1. Brushes: Use brushes best suited for the material applied. <br />2. Rollers: Use rollers of carpet, velvet back, or high-pile sheep's wool as recommended by the <br />manufacturer for the material and texture required. <br />3. Spray Equipment: Use airless spray equipment with orifice size as recommended by the <br />manufacturer for the material and texture required. <br />B. Minimum Coating Thickness: Apply materials no thinner than the manufacturer's recommended <br />spreading rate. Provide the total dry film thickness of the entire system as recommended by the <br />manufacturer. <br />C. Mechanical and Electrical Work: Painting mechanical and electrical work is limited to items exposed in <br />occupied spaces. <br />1. Mechanical items to be painted include, but are not limited to, the following: <br />a. Piping, pipe hangers, and supports. <br />b. Heat exchangers. <br />c. Tanks. <br />d. Ductwork. <br />e. Insulation. <br />f. Supports. <br />g. Accessory items. <br />2. Electrical items to be painted include, but are not limited to, the following: <br />a. Conduit and fittings, including hangers. <br />b. Switchgear. <br />D. Block Fillers: Apply block fillers to concrete masonry block at a rate to ensure complete coverage with <br />pores filled. <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE