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2. Original or later contributing masonry materials, features, <br />details, surfaces and ornamentation shall be retained and, if <br />necessary, repaired by patching, piecing -in, or consolidating <br />the masonry using recognized preservation methods. <br />3. Deteriorated or missing masonry materials, features, details, <br />surfaces and ornamentation shall be replaced with material <br />and elements which match the original in material, color, <br />texture, size, shape, profile and detail of installation. <br />4. When replacement of materials or elements is necessary, it <br />should be based on physical or documentary evidence. <br />5. If using the same material is not technically or economically <br />feasible, then compatible substitute materials may be <br />considered. <br />6. Original mortar shall be retained. <br />7. Deteriorated mortar shall be carefully removed by hand - <br />raking the joints. <br />8. Use of mechanical saws and hammers shall not be allowed. <br />9. Repointing mortar shall duplicate the original mortar in <br />strength, composition, color, texture, joint size, joint profile <br />and method of application. <br />10. Sample panels of raking the joints and repointing shall be <br />reviewed and approved by the staff of the Historic Preservation <br />Commission of South Bend and St. Joseph County. <br />11. Cleaning of masonry is discouraged and should be performed <br />only when necessary to halt deterioration. <br />12. If the building is to be cleaned, the mildest method possible <br />shall be used. <br />13. A test patch of the cleaning method(s) shall be reviewed and <br />approved on site by staff of the Historic Preservation <br />Commission of South Bend and St. Joseph County. Test <br />patches should always be carried out well in adva <br />0 15 <br />