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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 04 01 20.64—BRICK MASONRY REPOINTING <br /> D. Samples for Verification: For the following: <br /> 1. Each type, color, and texture of pointing mortar in the form of sample mortar strips, 6 inches (150 mm) long by <br /> [1/4 inch (6 mm)] [1/2 inch (13 mm)]wide, set in aluminum or plastic channels. <br /> a. Include with each Sample a list of ingredients with proportions of each. Identify sources, both supplier and <br /> quarry, of each type of sand and brand names of cementitious materials and pigments if any. <br /> 2. Sealant materials. <br /> 3. Accessories: Each type of accessory and miscellaneous support. <br /> 1.6 INFORMATIONAL SUBMITTALS <br /> A. Qualification Data: For masonry repointing specialist including field supervisors and workers and testing service. <br /> 1.7 QUALITY ASSURANCE <br /> A. Brick Masonry Repointing Specialist Qualifications: Engage an experienced masonry repointing firm to perform <br /> work of this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this <br /> Project with a record of successful in-service performance. Experience in only installing masonry is insufficient <br /> experience for masonry repointing work. <br /> 1. Field Supervision: Masonry repointing specialist firms shall maintain experienced full-time supervisors on <br /> Project site during times that masonry repointing work is in progress. <br /> B. Quality-Control Program: Prepare a written quality-control program for this Project to systematically demonstrate <br /> the ability of personnel to properly follow methods and use materials and tools without damaging masonry. Include <br /> provisions for supervising performance and preventing damage. <br /> C. Test Area: Prepare a test area for the masonry repointing to demonstrate aesthetic effects and to set quality <br /> standards for materials and execution. <br /> 1. Repointing: Rake out joints in two separate areas, for each type of repointing required, and repoint one of the <br /> areas. <br /> 2. Approval of test area does not constitute approval of deviations from the Contract Documents contained in <br /> mockups unless Architect specifically approves such deviations in writing. <br /> 3. Subject to compliance with requirements, approved mockups may become part of the completed Work if <br /> undisturbed at time of Substantial Completion. <br /> 1.8 DELIVERY, STORAGE,AND HANDLING <br /> A. Deliver packaged materials to Project site in manufacturer's original and unopened containers, labeled with <br /> manufacturer's name and type of products. <br /> B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious <br /> materials that have become damp. <br /> C. Store hydrated lime in manufacturer's original and unopened containers. Discard lime if containers have been <br /> damaged or have been opened for more than two days. <br /> D. Store sand where grading and other required characteristics can be maintained and contamination avoided. <br /> 1.9 FIELD CONDITIONS <br /> A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit <br /> repointing work to be performed according to product manufacturers' written instructions and specified <br /> requirements. <br /> B. Temperature Limits: Repoint mortar joints only when air temperature is between 40 and 90 deg F (4 and 32 deg C) <br /> and is predicted to remain so for at least seven days after completion of the Work unless otherwise indicated. <br /> C. Cold-Weather Requirements: Comply with the following procedures for mortar-joint pointing unless otherwise <br /> indicated: <br /> 1. When air temperature is below 40 deg F (4 deg C), heat mortar ingredients and existing masonry walls to <br /> produce temperatures between 40 and 120 deg F (4 and 49 deg C). <br /> 2. When mean daily air temperature is below 40 deg F (4 deg C), provide enclosure and heat to maintain <br /> temperatures above 32 deg F(0 deg C)within the enclosure for seven days after pointing. <br /> D. Hot-Weather Requirements: Protect mortar-joint pointing when temperature and humidity conditions produce <br /> excessive evaporation of water from mortar materials. Provide artificial shade and wind breaks, and use cooled <br /> materials as required to minimize evaporation. Do not apply mortar to substrates with temperatures of 90 deg F (32 <br /> deg C)and above unless otherwise indicated. <br /> PART 2 -PRODUCTS <br /> 2.1 PERFORMANCE REQUIREMENTS <br /> A. Source Limitations: Obtain each type of material for repointing brick masonry (cement, sand, etc.) from single <br /> source with resources to provide materials of consistent quality in appearance and physical properties. <br /> ©BOOMERANG DESIGN 04 01 20.64-2 510 Meadowlands Drive,Hillsborough, NC <br /> BD#1835 ORANGE COUNTY,NC 12/07/2018 <br />