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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />STONE WALL FACING <br /> 09 75 13 - 8 <br /> <br /> <br />3.4 INSTALLATION OF STONE FACING <br />A. Set units firmly against setting spots. Locate setting spots at anchors and spaced <br />not more than 18 inches apart across back of unit, but provide no fewer than one <br />setting spot per 2 sq. ft. unless otherwise indicated. <br />1. Moisture Exposure: Use portland cement mortar for setting spots where stone <br />is applied to inside face of exterior walls. <br />B. Set units with anchors securely attached to stone and to backup surfaces. Comply <br />with anchoring recommendations in ASTM C 1242. <br />1. Provide compressible filler in ends of dowel holes and bottoms of kerfs to <br />prevent end bearing of dowels and anchor tabs on stone. Fill remainder of <br />anchor holes and kerfs with sealant for filling kerfs. <br />2. Set stone supported on clips or continuous angles on resilient setting shims. <br />Use material of thickness required to maintain uniform joint widths and to <br />prevent point loading of stone on anchors. Hold shims back from face of stone <br />a distance at least equal to width of joint. <br />C. Minimum Anchors: Provide a minimum of four anchors per panel up to 12 sq. ft. in <br />face area, plus a minimum of two additional anchors for each additional 8 sq. ft.. <br />3.5 ADJUSTING AND CLEANING <br />A. In-Progress Cleaning: Clean stone paneling as work progresses. Remove adhesive, <br />grout, mortar, and sealant smears immediately. <br />B. Remove and replace stone paneling of the following description: <br />1. Broken, chipped, stained, or otherwise damaged stone. Stone may be <br />repaired if methods and results are approved by Architect. <br />2. Defective stone paneling. <br />3. Defective joints, including misaligned joints. <br />4. Stone paneling and joints not matching approved Samples and mockups. <br />5. Stone paneling not complying with other requirements indicated. <br />C. Replace in a manner that results in stone paneling that matches approved Samples <br />and mockups, complies with other requirements, and shows no evidence of <br />replacement. <br />D. Clean stone paneling no fewer than six days after completion of grouting and <br />pointing, using clean water and soft rags or stiff-bristle fiber brushes. Do not use <br />wire brushes, acid-type cleaning agents, cleaning compounds with caustic or harsh <br />fillers, or other materials or methods that could damage stone. <br />E. Sealer Application: Apply stone sealer to comply with stone producer's and sealer <br />manufacturer's written instructions and recommendations.