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DSS Skills Development Center Smith Sinnett / 2020045 <br />Chapel Hill, North Carolina Orange County <br /> <br />RESILIENT BASE AND ACCESSORIES 09 65 13 - 4 <br />3.2 PREPARATION <br />A. Prepare substrates according to manufacturer's written instructions to ensure adhesion of resilient <br />products. <br />B. Concrete Substrates for Resilient Stair Treads and Accessories: Prepare according to ASTM F 710. <br />1. Verify that substrates are dry and free of curing compounds, sealers, and hardeners. <br />2. Remove substrate coatings and other substances that are incompatible with adhesives and that <br />contain soap, wax, oil, or silicone, using mechanical methods recommended by manufacturer. Do <br />not use solvents. <br />3. Alkalinity and Adhesion Testing: Perform tests recommended by manufacturer. <br />4. Moisture Testing: Perform tests recommended by manufacturer and as follows. Proceed with <br />installation only after substrates pass testing. <br />a. Perform anhydrous calcium chloride test, ASTM F 1869. Proceed with installation only <br />after substrates have maximum moisture-vapor-emission rate of 3 lb of water/1000 sq. ft. in <br />24 hours. <br />b. Perform relative humidity test using in situ probes, ASTM F 2170. Proceed with <br />installation only after substrates have maximum 75 percent relative humidity level <br />measurement. <br />C. Fill cracks, holes, and depressions in substrates with trowelable leveling and patching compound and <br />remove bumps and ridges to produce a uniform and smooth substrate. <br />D. Do not install resilient products until they are same temperature as the space where they are to be <br />installed. <br />1. Move resilient products and installation materials into spaces where they will be installed at least <br />48 hours in advance of installation. <br />E. Sweep and vacuum clean substrates to be covered by resilient products immediately before installation. <br />3.3 RESILIENT BASE INSTALLATION <br />A. Comply with manufacturer's written instructions for installing resilient base. <br />B. Apply resilient base to walls, columns, pilasters, casework and cabinets in toe spaces, and other <br />permanent fixtures in rooms and areas where base is required. <br />C. Install resilient base in lengths as long as practicable without gaps at seams and with tops of adjacent <br />pieces aligned. <br />D. Tightly adhere resilient base to substrate throughout length of each piece, with base in continuous contact <br />with horizontal and vertical substrates. <br />E. Do not stretch resilient base during installation. <br />F. Preformed Outside Corners: Install preformed corners before installing straight pieces. <br />G. Job-Formed Inside Corners: <br />1. Outside Corners: Use straight pieces of maximum lengths possible. Form without producing <br />discoloration (whitening) at bends. <br />2. Inside Corners: Use straight pieces of maximum lengths possible. Form inside corners on job <br />from straight pieces of maximum lengths possible by cutting an inverted V-shaped notch in toe of <br />wall base at the point where corner is formed. Shave back of base where necessary to produce <br />snug fit to substrate. <br />3.4 RESILIENT ACCESSORY INSTALLATION <br />A. Comply with manufacturer's written instructions for installing resilient accessories. <br />B. Resilient Molding Accessories: Butt to adjacent materials and tightly adhere to substrates throughout <br />length of each piece. Install reducer strips at edges of carpet and resilient floor covering that would <br />otherwise be exposed. <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE