63
Design Standards for Brick and Other Masonry 1. Identify, retain, and preserve brick and other masonry materials, features and details including but not limited to masonry walls, foundations, pointing patterns, chimneys, corbelling, cornices, arches, moldings, fences, retaining walls, plinths, etc. 2. Protect and maintain brick and other masonry materials, features, and their details. 3. Repair missing or damaged brick and other masonry materials, features, and details in-kind, matching the brick or stone with a similar size, color, texture, and mortar color, joint width, profile, and finish. Brick bond patterns and stone patterns shall be retained when repaired. 4. Replace deteriorated brick and other masonry materials, features, and details only if the existing material is beyond repair. Replace missing or damaged brick and mason- ry in-kind, matching the existing in pattern, design, size, color, texture, and mortar in strength, color, joint width, profile, and finish. Additionally, brick bond patterns and stone patterns shall be retained when brick or other masonry is replaced. 5. It is appropriate to repoint brick or masonry to preserve structural integrity or when excessive mortar damage is present. 6. It is appropriate to clean masonry surfaces with water (garden hose strength) and, if
necessary using mild detergents and soft bristle brushes. 7. It is inappropriate to use blasting of any kind (sand, glass, soda, etc.) on masonry finishes. 8. It is inappropriate to use power tools such as saws and routers to remove deteriorated mortar joints. Such tools may overcut the joint and damage the brick or stone. Mortar shall be removed by hand to prevent damage of the masonry. The joint strength, width, profile, and finish must duplicate the original. The mortar must match the original in terms of its composition, content, color, texture, strength, and appearance. Portland cement is not appropriate to repair historic mortars as it can cause spalling and further deterioration. However, some mid-century buildings may have used Portland cement originally. Please contact the Preservation Planner or Restoration Specialist with the NC SHPO for assistance and guidance. 9. It is inappropriate to paint, waterproof, or coat
prot ect MASONRY w i t h rou t i ne MAINTENANCE P • Conduct routine inspections. • Ensure masonry is free of vegetation. • Maintain adequate drainage around foundations and away from masonry walls. • Ensure that mortar joints are sound and intact. • Repair and repoint mortar matching the strength, content, color, texture, profile, and shape of the historic mortar joint.
unpainted or uncoated masonry. However, if masonry has historically been painted it is appropriate to repaint. 10. It is inappropriate to remove original stucco. Repair stucco with a mixture duplicating the original as closely as possible in composition, color, texture, style, and character. Do not point or repair stucco using Portland cement. 11. It is inappropriate to paint stucco unless it has historically been painted.
Made with FlippingBook - professional solution for displaying marketing and sales documents online