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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />MIRRORS <br /> 08 83 00 - 5 <br /> <br /> <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine substrates, over which mirrors are to be mounted, with Installer present, <br />for compliance with installation tolerances, substrate preparation, and other <br />conditions affecting performance of the Work. <br />B. Verify compatibility with and suitability of substrates, including compatibility of <br />existing finishes or primers with mirror mastic. <br />C. Proceed with installation only after unsatisfactory conditions have been corrected <br />and surfaces are dry. <br />3.2 PREPARATION <br />A. Comply with mastic manufacturer's written installation instructions for preparation <br />of substrates, including coating substrates with mastic manufacturer's special bond <br />coating where applicable. <br />3.3 INSTALLATION <br />A. General: Install mirrors to comply with mirror manufacturer's written instructions <br />and with referenced GANA publications. Mount mirrors accurately in place in a <br />manner that avoids distorting reflected images. <br />1. GANA Publications: "Glazing Manual" and "Mirrors, Handle with Extreme Care: <br />Tips for the Professional on the Care and Handling of Mirrors." <br />B. Provide a minimum airspace of 1/8 inch between back of mirrors and mounting <br />surface for air circulation between back of mirrors and face of mounting surface. <br />C. Install mirrors with mastic and mirror hardware. Attach mirror hardware securely to <br />mounting surfaces with mechanical fasteners installed with anchors or inserts as <br />applicable. Install fasteners so heads do not impose point loads on backs of <br />mirrors. <br />1. Aluminum J-Channels: Provide setting blocks 1/8 inch thick by 4 inches long <br />at quarter points. To prevent trapping water, provide, between setting blocks, <br />two slotted weeps not less than 1/4 inch wide by 3/8 inch long at bottom <br />channel. <br />2. Install mastic as follows: <br />a. Apply barrier coat to mirror backing where approved in writing by <br />manufacturers of mirrors and backing material. <br />b. Apply mastic to comply with mastic manufacturer's written instructions <br />for coverage and to allow air circulation between back of mirrors and <br />face of mounting surface.