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Orange County Health Department Improvements Smith Sinnett / 2024008 <br />Hillsborough, NC Orange County Asset Management Services <br />TOPICAL MOISTURE VAPOR MITIGATION SYSTEM 07 26 19 - 4 <br />3.3 INSTALLATION AND APPLICATION <br />A. Examine substrates and conditions under which materials will be installed. Do not proceed with <br />installation until unsatisfactory conditions are corrected. <br />B. Coordinate installation with adjacent work to ensure proper sequence of construction. Protect adjacent <br />areas from contact due to mixing and handling of materials. <br />C. Mixing: Comply with manufacturer’s printed instructions and the following. <br />1. Each individual unit contains separate, pre-measured quantities of hardener (Part B) and the resin <br />(Part A). After opening each container, stir the individual components thoroughly before blending. <br />The hardening agent (Part B) is added to the resin (Part A). <br />2. Pour all of the hardener into the resin portion and stir thoroughly for a minimum of 3 minutes <br />using a low speed drill and an epoxy mixing paddle. Once mixed, pour some of the epoxy back <br />into the hardener container, stir for 10 seconds, and then pour all of the contents back into the resin <br />container. Mix for an additional 30 seconds before applying. <br />D. Application: Comply with manufacturer’s printed instructions and the following. <br />1. Apply the first coat to the prepared concrete surface in a uniform direction at an application rate of <br />up to 270 sq. ft. per unit to achieve a coating thickness of 10 mils. Use a short-nap paint roller or <br />notched squeegee for smoother surfaces, and a longer nap roller for more uneven substrates. To <br />minimize the potential for pinhole formation, work the material into the surface with the roller to <br />ensure maximum penetration. The material can also be worked into the surface with a paintbrush <br />for hard to reach areas and corners. Once the area is completely coated, allow to dry for a <br />minimum of 4 hours (max. 24 hours). <br />2. Install underlayment according to manufacturers recommendations for installing over the <br />moisture mitigation system. <br />3. For Underlayment applications greater than …, or if the mitigation system was not worked into <br />the surface sufficiently enough to prevent pinholes, a third coat with sand broadcast is needed. <br />a. Working at a 90 angle to the direction the first coat was applied; apply material at a <br />coverage rate of 10 mils. While this coat is still in a fresh state (maximum 20 minutes), <br />broadcast an excess of fine sand (less than 1/50 of an inch in grain size or 98.5% passing <br />sieve size #35 or #30) consistently over the entire area. <br />b. Use approximately 1 lb. of sand per square foot of area. Once the sand broadcast is <br />complete, avoid all traffic over the surface for a minimum of 4 hours. <br />c. After 4 hours, broom sweep and vacuum the surface to remove all loose sand. The clean, <br />prepared surface of the sand is the priming system for the Underlayment. No additional <br />priming is required. <br />3.4 FIELD QUALITY CONTROL <br />A. Where specified, field sampling of the products is to be done by taking an entire unopened bag/unit of the <br />product being installed to an independent testing facility to perform testing. There is no in-situ test <br />method applicable for this system. <br />3.5 PROTECTION <br />A. Prior to the installation of the finish flooring, the surface of the underlayment should be protected from <br />abuse by other trades by the use of plywood, Masonite or other suitable protection course. <br />END OF SECTION 07 26 19 <br />Docusign Envelope ID: 186E0FF8-664C-4A5C-9F97-28196CE69FD1