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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 - 4 <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine substrates and conditions under which coatings will be applied for compliance with requirements on <br />applying coatings. Surfaces to receive coatings must be thoroughly dry before coatings are applied. <br />1. Do not proceed with coating application until unsatisfactory conditions have been corrected. <br />2. Start of application will be construed as the Applicator’s acceptance of surfaces within that particular <br />area. <br />B. Coordinating Work: Review sections in which other coatings are provided to ensure compatibility of the total <br />systems for various substrates. On request, furnish information on the characteristics of specified finish <br />materials to ensure compatible primers. <br />1. Notify the Architect of problems anticipated using the coatings specified over substrates primed by <br />others. <br />3.2 PREPARATION <br />A. General: Remove hardware and hardware accessories, plates, machined surfaces, lighting fixtures, and <br />similar items already in place that are not to be coated, or provide surface-applied protection prior to surface <br />preparation and coating. Remove these items, if necessary, to completely coat the items and adjacent <br />surfaces. Following the coating operations in each space or area, have removed items reinstalled by workers <br />skilled in the trades involved. <br />B. Cleaning: Before applying coatings or other surface treatments, clean the substrates of substances that could <br />impair bond of the various coatings. Remove oil and grease prior to cleaning. Schedule cleaning and coating <br />application so dust and other contaminates from the cleaning process will not fall on wet, newly coated <br />surfaces. <br />3.3 SURFACE PREPARATION <br />A. Clean and prepare surfaces to be coated according to the manufacturer’s instructions for each particular <br />substrate condition and as specified. <br />1. Provide barrier coats over incompatible primers, or remove and reprime. Notify the Architect in <br />writing of problems anticipated when using the specified finish-coat material with substrates primed <br />by others. <br />2. Cementitious Surfaces: Prepare concrete, concrete masonry block, cement plaster, and similar <br />surfaces to receive special coatings. Remove efflorescence, chalk, dust, dirt, grease, oils, and release <br />agents. Roughen, as required, to remove glaze. If hardeners or sealers have been used to improve <br />concrete curing, use mechanical methods to prepare surface. <br />a. Use abrasive blast-cleaning methods if recommended by the coating system manufacturer. <br />b. Determine alkalinity and moisture content of surfaces to be coated by performing appropriate <br />tests. If surfaces are sufficiently alkaline to cause the finish coats to blister and burn, correct <br />this condition before application. Do not apply coatings over surfaces where the moisture <br />content exceeds that permitted in the manufacturer’s printed directions. <br />B. Material Preparation: Carefully mix and prepare materials according to the coating manufacturer’s directions. <br />1. Maintain containers used in mixing and application of coatings according to the manufacturer’s <br />directions. <br />2. Stir materials before applying to produce a mixture of uniform density; stir as required during <br />application. Do not stir surface film into the material. Remove film and, if necessary, strain the <br />coating material before using. <br />3. Use only the type of thinners approved by the manufacturer and only within recommended limits. <br />Docusign Envelope ID: 186E0FF8-664C-4A5C-9F97-28196CE69FD1