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1. He shall have no less than five (5) years of field experience as a <br />superintendent for the type of work specified and required by this Project. <br /> <br />B. The highest standards of craftsmanship shall prevail from the start of the work to <br />completion. <br /> <br />3.2 JOINT REMOVALS AND REPAIRS <br /> <br />A. Remove all sealant in joints within the limits of restoration work. <br /> <br />B. Remove mortar in all vertical and horizontal mortar joints within limits of <br />restoration work by means of joint rakers, hand tools, grinders and/or pneumatic <br />tools. Remove mortar to a min. depth of 2 - 2½" times the width of the joint to <br />surface to a watertight condition. <br />1. Exercise care not to damage the edges and corners of the stone. <br />2. Bottom of joints shall be square cornered (perpendicular with the bed face <br />of the stone). <br />3. All joints are to be cleaned and free of all clinging mortar from the edges <br />of the joints. The joints shall be cleaned with air or flushed clean with <br />water to ensure the adherence of the new mortar. <br /> <br />C. Cut out damaged stone and replace with new stone. Replace missing brick <br />with new stone, matching existing precisely. <br /> <br />3.3 TUCKPOINTING MASONRY <br /> <br />A. Inspection: <br />1. Examine the wall surfaces to determine that joint removal work is <br />complete, cleaning is complete, and joints are clean and free of loose <br />materials, ready for installation of tuckpointing mortar. <br /> <br />B. Mortar Mixes: <br />1. The mixing ratio is approximately 4½ - 5 parts powder to 1 part water by <br />volume, depending on temperature and humidity. More water may be <br />required as ambient temperature rises. The mixing may be done by <br />hand, stirring until the mortar is thoroughly mixed. For best results, add <br />the powder to the water slowly. The working time will vary, depending <br />upon wind, temperature and humidity. Using excessive water in the mix <br />may affect the color of the repair. <br /> <br />C. Placing Tuckpointing Mortar: <br />1. Joints shall be wetted before installation of new mortar to prevent rapid <br />setting, but not wet beyond saturation point of the brick. <br />2. Where existing mortar has been removed to a depth greater than one <br />inch (1"), these deeper spaces shall be filled first, compacting new mortar <br />in several layers. <br />3. Start placing new mortar from the back of the entire joint filling about a <br />one-quarter (1/4") inch thick layer for several feet at a time. Pack tightly, <br /> <br />MASONRY RESTORATION REPAIR <br />04920-3 <br /> <br />