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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 04 01 20.64—BRICK MASONRY REPOINTING <br /> 2. Pointing Mortar by Type: ASTM C270, Proportion Specification, [Type N] <Insert Type> unless otherwise <br /> indicated; with cementitious material limited to [portland cement and lime] [masonry cement] [or] [mortar <br /> cement].[Add mortar pigments to produce mortar colors required.] <br /> 3. Pointing Mortar by Property: ASTM C270, Property Specification, [Type N] <Insert Type> unless otherwise <br /> indicated; with cementitious material limited to [portland cement and lime] [masonry cement] [or] [mortar <br /> cement].[Add mortar pigments to produce mortar colors required.] <br /> PART 3 -EXECUTION <br /> 3.1 REPOINTING SPECIALIST <br /> A. Brick Masonry Repointing Specialist Firms: Subject to compliance with requirements, [have masonry repointing <br /> performed by one of the following] [firms that may perform masonry repointing include, but are not limited to, the <br /> following]: <br /> 1. <Insert, in separate subparagraphs, names of masonry repointing specialist firms>. <br /> 3.2 PROTECTION <br /> A. Prevent mortar from staining face of surrounding masonry and other surfaces. <br /> 1. Cover sills, ledges, and other projecting items to protect them from mortar droppings. <br /> 2. Keep wall area wet below pointing work to discourage mortar from adhering. <br /> 3. Immediately remove mortar splatters in contact with exposed masonry and other surfaces. <br /> B. Remove[gutters and] downspouts and associated hardware adjacent to masonry and store during masonry <br /> repointing. Reinstall when repointing is complete. <br /> 1. Provide temporary rain drainage during work to direct water away from building. <br /> 3.3 MASONRY REPOINTING, GENERAL <br /> A. Appearance Standard: Repointed surfaces are to have a uniform appearance as viewed from [20 feet (6 m)] [50 <br /> feet(15 m)] <Insert distance>away by Architect. <br /> 3.4 REPOINTING<Insert drawing designation> <br /> A. Rake out and repoint joints to the following extent: <br /> 1. All joints in areas indicated. <br /> 2. Joints indicated as sealant-filled joints. <br /> 3. Joints at locations of the following defects: <br /> a. Holes and missing mortar. <br /> b. Cracks that can be penetrated 1/4 inch (6 mm)or more by a knife blade 0.027 inch (0.7 mm)thick. <br /> c. Cracks[1/16 inch (1.6 mm)] [118 inch (3 mm)] <Insert dimension>or more in width and of any depth. <br /> d. Hollow-sounding joints when tapped by metal object. <br /> e. Eroded surfaces 1/4 inch (6 mm)or more deep. <br /> f. Deterioration to point that mortar can be easily removed by hand,without tools. <br /> g. Joints filled with substances other than mortar. <br /> B. Do not rake out and repoint joints where not required. <br /> C. Rake out joints as follows, according to procedures demonstrated in approved mockup: <br /> 1. Remove mortar from joints to depth of[joint width plus 1/8 inch (3 mm)] [2 times joint width] [2-1/2 times <br /> joint width] [not less than 1/2 inch (13 mm)] [not less than 3/4 inch (20 mm)] [and] [not less than that <br /> required to expose sound, unweathered mortar] Ansert requirement>. Do not remove unsound mortar <br /> more than [2 inches (50 mm)]<Insert dimension>deep; consult Architect for direction. <br /> 2. Remove mortar from brick and other masonry surfaces within raked-out joints to provide reveals with square <br /> backs and to expose masonry for contact with pointing mortar. Brush, vacuum, or flush joints to remove dirt <br /> and loose debris. <br /> 3. Do not spall edges of brick or other masonry units or widen joints. Replace or patch damaged brick or other <br /> masonry units as directed by Architect. <br /> D. Notify Architect of unforeseen detrimental conditions including voids in mortar joints, cracks, loose masonry units, <br /> rotted wood, rusted metal, and other deteriorated items. <br /> E. Pointing with Mortar: <br /> 1. Rinse joint surfaces with water to remove dust and mortar particles. Time rinsing application so, at time of <br /> pointing,joint surfaces are damp but free of standing water. If rinse water dries, dampen joint surfaces before <br /> pointing. <br /> 2. Apply pointing mortar first to areas where existing mortar was removed to depths greater than surrounding <br /> areas. Apply in layers not greater than [3/8 inch (9 mm)] <Insert dimension> until a uniform depth is formed. <br /> Fully compact each layer, and allow it to become thumbprint hard before applying next layer. <br /> 3. After deep areas have been filled to same depth as remaining joints, point joints by placing mortar in layers not <br /> greater than [3/8 inch (9 mm)] <Insert dimension>. Fully compact each layer and allow to become thumbprint <br /> hard before applying next layer. Where existing masonry units have worn or rounded edges, slightly recess <br /> ©BOOMERANG DESIGN 04 01 20.64-4 510 Meadowlands Drive,Hillsborough,NC <br /> BD#1835 ORANGE COUNTY,NC 12/07/2018 <br />