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down to and including limestone trim band. Notify Owner if structural terra cotta substrate is <br />deteriorated. Notify Owner if joists behind or bearing into the terra cotta are damaged or <br />unsupported. <br />D. Inspect condition of steel lintels immediately below work area. Recommend to Owner if further <br />masonry disassembly and replacement of lintel is recommended. <br />E. Clean individual masonry units of old mortar and prepare for reuse. Stack carefully and protect <br />from damage. All limestone trim and quoins to be reinstalled in the same location removed from. <br />P. Replace damaged or deteriorated structural terra cotta with new CMU masonry of same thickness <br />as intact adjacent terra cotta blocks. <br />G. Relay original limestone trim band, any mist. limestone trim pieces, original bricks, and limestone <br />coping into their original configuration to match and align with existing, with joints and coursing <br />true and level, faces plumb and in line. If decorative limestone urn was removed reinstall with <br />new steel connection bar. Build in all openings, accessories and fittings. <br />H. Mortar used to relay parapet masonry to be of appropriate softness to be compatible with historic <br />masonry units. Color and proportion to match existing work. Match aggregate sand in mortar to <br />obtain similar color and texture as original mortar. <br />I. Backer rod and elastomeric sealant at limestone coping head joints. Sonoborne NP-1 or <br />approved equal. Color to match limestone. <br />J. Secure EPDM membrane to top of limestone coping when finished with parapet section using the <br />same interim method employed by the roofing contractor. Roofing contractor will return and <br />install aluminum coping cap over limestone coping per detail. Carefully inspect and vacuum <br />clean decking/insulation of any loose masonry or mortar before securing EPDM. <br />3.6 CLEANING REPOINTED & REBUILT MASONRY <br />A. Verify mortar is fully set and cured. <br />B. Clean surfaces and remove large particles with wood scrapers, brass or nylon wire brushes. <br />C. Scrub walls with muriatic acid cleaning solution using stiff brush. Thoroughly rinse and wash off <br />cleaning solution, dirt and mortar crumbs using clean, pressurized water. <br />D. Before solution dries, rinse and remove acid solution and dissolved mortar, using clean, <br />pressurized water. <br />3.7 CLEANING <br />A. Immediately remove stains, efflorescence, or other excess resulting from the work of this Section. <br />B. Remove excess mortar, smears, and droppings as work proceeds and upon completion. <br />C. Clean surrounding and adjacent masonry surfaces. <br />3.8 SEALANT <br />A. Apply clear siloxane sealant to repaired precast concrete finial urns. <br />