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EPDXY FLOORING <br />W/ VAPOR CONTROL <br />Section 09705 <br />15-1207 <br />of all other trades is complete to the point where this installation may properly commence. <br />Verify that flange -type area drains are installed properly and are at the proper elevation. <br />B. Verify that specified items may be installed in accordance with the approved design. <br />C. In event of discrepancy, immediately notify Architect. Do not proceed in discrepant areas <br />until discrepancies have been fully resolved. <br />D. Check that the areas to receive coating are clean, dry and free of incompatible coating. <br />Starting work shall constitute acceptance of the substrate. <br />E. Concrete Subfloor Testing: Perform the following tests prior to start of installation to confirm <br />the substrate is ready to receive the finish materials: <br />1. Vapor Emission and pH Test: Perform anhydrous calcium chloride test per ASTM F <br />1869-98 to determine vapor emission rate. Set 3 tests for the first 1,000 square feet <br />and 1 test for every 1,000 square feet thereafter. Weigh the dishes before setting <br />them into test position, and seal and weigh them on site immediately upon removal. <br />Do not send to the dishes to another testing entity to be weighed. Perform a pH test <br />using a pH pencil for accurate results. Do not use litmus paper. Properly document all <br />results and procedures, including existing environmental conditions. <br />2. Submit test results to Architect a minimum of 10 days prior to scheduled installation <br />date of floor system. <br />3. Vapor Control Primer 200 may be used on old concrete with emissions below 10 <br />pounds or on "new" concrete over 14 days with higher emissions levels but where the <br />emissions are expected to be reduced by cement hydration. If prior to installation, the <br />emissions remain above 10 pounds but below 15 pounds, Vapor Control Primer 100 <br />may be applied in lieu of Vapor Control Primer 200, at no cost to the Owner unless <br />otherwise authorized. Where emissions exceed 15 lbs, consult the Dex-O-Tex <br />Representative, Richard Swan, (650) 992-7100 and investigate the cause of the <br />excessive emissions prior to proceeding. <br />F. Do not commence installation of system until work on substrate is completed and all <br />conditions are satisfactory. <br />3.02 PREPARATION <br />A. Prepare subsurfaces as required to receive flooring. Shot -blast, diamond grind or power <br />scarify as required to obtain optimum bond of flooring system to concrete. Include cleaning <br />of laitance, glaze, efflorescence, and any bond prohibiting curing compounds or form release <br />agents. Remove grease, oil and foreign matter. Patch and level cracks, holes, joints and <br />depressions with flooring manufacturer's approved patching and leveling compound. <br />3.03 INSTALLATION <br />A. Vapor Dissipation System: Roller -apply to 7 mils thickness or as recommended by <br />manufacturer forgiven conditions. Rout out all joints and cracks over 1/16" to %" wide by <br />minimum 3/8" deep, then apply vapor control primer over entire prepared substrate followed <br />by filling all the cracks and joints with Waterproofing/Vapor Barrier/Anti-fracture membrane <br />which is striped out 3" on each side of the crack or joint. <br />B. Waterproofing/Vapor Barrier/Anti-fracture Membrane: On all floors that are not on grade, <br />apply per manufacturer's recommendations covering the entire floor at 40 mils thickness. <br />IH <br />