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City of South Bend and St. Joseph County Historic Preservation Guidelines 59 <br />Commercial Standards: Walls <br />General Understanding and Approach <br />Walls provide protection for interior structural framing and give a building its architectural look . Walls should be repaired with matching material, mortar color, texture and strength and joint size and profile. Cleaning should be done with the gentlest means possible avoiding aggressive media or water pressure . Traditionally painted surfaces should be kept painted whereas traditionally unpainted surfaces should remain coating free . <br />Read more about the recommendations for wall maintenance, repair, and construction here . <br />See also Cornices, Storefronts, Doors, and Windows . <br />What is Your Project? <br />Repair a Wall <br />Repairs to a wall should be done with materials and designs that match the original look . <br />Brick and Other Masonry Materials <br />• Brick and terra cotta units should match the size, color, shape, and finish of the original material . <br />• Mortar should be similar in strength, color <br />and joint rake, depth, and decorative <br />finishes. <br />• When possible, salvage and reuse original bricks in the repair . <br />• Fiberglass reproductions of missing terra cotta pieces are acceptable provided a mock-up sample is presented for approval prior to full scale use in the project . <br />Stucco <br />• Stucco on walls should match the original <br />in texture and tooling . <br />• Modern stucco materials are allowable for recoating and repair so long as the result is not a diminished reveal for the windows, trim, doors or other wall details . <br />Walls