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Orange County Health Department Improvements Smith Sinnett / 2024008 <br />Hillsborough, NC Orange County Asset Management Services <br />SPECIAL COATINGS 09 97 00 - 5 <br />C. Tinting: Tint each undercoat a lighter shade to facilitate identifying each coat where multiple coats of the <br />same material are to be applied. Tint undercoats to match the color of the finish coat, but provide sufficient <br />difference in shade of undercoats to distinguish each separate coat. <br />3.4 APPLICATION <br />A. General: Apply special coatings by brush, roller, spray, squeegee, or other applicators according to the <br />manufacturer’s directions. Use brushes best suited for the material being applied. Use rollers of carpet, velvet <br />back, or high-pile sheep’s wool as recommended by the manufacturer for the material and texture required. <br />1. Do not apply coatings over dirt, rust, scale, grease, moisture, scuffed surfaces, or conditions <br />detrimental to forming a durable coating film. <br />2. Coating colors, surface treatments, and finishes are indicated in the Schedules. <br />3. Provide finish coats compatible with the primers used. <br />4. The number of coats and film thickness required is the same regardless of the application method. Do <br />not apply succeeding coats until the previous coat has cured as recommended by the manufacturer. <br />Where sanding is required, according to the manufacturer’s directions, sand between applications to <br />produce a smooth, even surface. <br />5. When undercoats or other conditions show through the final coat, apply additional coats until the <br />cured film has a uniform coating finish, color, and appearance. Give special attention to edges, <br />corners, crevices, welds, exposed fasteners, and similar surfaces to ensure that they 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 coatings <br />in these areas, as required, to maintain the system integrity and provide desired protection. <br />a. Coat surfaces behind movable equipment and furniture the same as similar exposed surfaces. <br />b. Coat the back sides of access panels, removable or hinged covers, and similar hinged items to <br />match exposed surfaces. <br />c. Omit primer on metal surfaces that have been shop-primed and touch-up painted. <br />B. Scheduling Coating: Apply first coat to surfaces that have been cleaned, pretreated, or otherwise prepared for <br />coating as soon as practicable after preparation and before subsequent surface deterioration. <br />1. Allow sufficient drying time between successive coats. Do not recoat until the coating has dried so it <br />feels firm and does not deform or feel sticky under moderate thumb pressure and where applying <br />another coat does not cause the undercoat to lift or lose adhesion. <br />C. Application Procedures: Apply coatings by brush, roller, spray, or other applicators according to the <br />manufacturer’s 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 spray equipment with orifice size as recommended by the manufacturer for the <br />material and texture required. <br />D. Minimum Coating Thickness: Apply each material no thinner than the manufacturer’s recommended <br />spreading rate. Provide total dry film thickness of the entire system as recommended by the manufacturer. <br />E. Block Fillers: Apply block fillers to concrete masonry block at a rate to ensure complete coverage with pores <br />filled. <br />F. Prime Coats: Before applying finish coats, apply a prime coat of material, as recommended by the <br />manufacturer, to the material required to be coated or finished that has not been prime-coated by others. <br />1. Recoat primed and sealed substrates where there is evidence of suction spots or unsealed areas in the <br />first coat to ensure a finish coat with no burn-through or other defects caused by insufficient sealing. <br />Docusign Envelope ID: 186E0FF8-664C-4A5C-9F97-28196CE69FD1