Work Sequence: Perform brick masomy repair work in the following sequence, which includes work specified in this and other Sections:

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1 SECTION BRICK MASONRY REP AIR PART 1- GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY Section Includes: 1. Repairing brick masomy, including replacing units. 1.3 DEFINITIONS Rebuilding (Setting) Mortar: Mortar used to set and anchor masomy in a structure, distinct from pointing mortar installed after masomy is set in place. Saturation Coefficient: Ratio of the weight of water absorbed during immersion in cold water to weight absorbed during immersion in boiling water; used as an indication of resistance of masonry units to freezing and thawing. 1.4 SEQUENCING AND SCHEDULING Order sand and gray pmiland cement for colored mortar immediately after approval of Samples. Take delivmy of and store at Project site enough quantity to complete Project. Work Sequence: Perform brick masomy repair work in the following sequence, which includes work specified in this and other Sections: 1. Remove plant growth. 2. Inspect masomy for open mortar joints and point them before cleaning to prevent the intrusion of water and other cleaning materials into the wall. 3. Clean masonry. 4. Rake out mortar from joints sunounding masomy to be replaced and from joints adjacent to masonry repairs along joints. 5. Repair masomy, including replacing existing masonry with new masomy materials. 6. Rake out mortar from joints to be repointed. 7. Point motiar and sealant joints. 8. After repairs and repainting have been completed and cured, perfonn a final cleaning to remove residues from this work. 9. Where water repellents are to be used on or near masomy work, delay application of these chemicals until after pointing and cleaning. C. As scaffolding is removed, patch anchor holes used to attach scaffolding. Patch holes in masomy units according to "Masomy Unit Patching" Article. Patch holes in mortar joints according to Section "Brick Masomy Repainting." October 17, 2016 Brick Masonry Repair

2 1.5 SUBMITTALS Product Data: For each type of product. 1. Include constmction details, material descriptions, dimensions of individual components and profiles, and finishes. 2. Include recommendations for product application and use. Include test data substantiating that products comply with requirements. Samples for Initial Selection: For the following: 1. Colored Mortar: Submit sets of moliar that will be left exposed in the form of sample mortar strips, 6 inches (150 mm) long by 1/2 inch (13 nnn) wide, set in aluminum or plastic channels. a. Have each set contain a close color range of at least six Samples of different mixes of colored sands and cements that produce a mmiar matching existing, cleaned mortar when cured and d1y. b. Submit with precise measurements on ingredients, proportions, gradations, and source of colored sands from which each Sample was made. 2. Sand Types Used for Mmiar: Minimum 8 oz. (240 ml) of each in plastic screw-top jars. 3. Patching Compound: Submit sets of patching compound Samples in the form of plugs (patches in drilled holes) in sample units of masomy representative of the range of masomy colors on the building. a. Have each set contain a close color range of at least six Samples of different mixes of patching compound that matches the variations in existing masonry when cured and d1y. 4. Include similar Samples of accessories involving color selection. C. Samples for Verification: For the following: 1. Each type of brick unit to be used for replacing existing units. Include sets of Samples to show the full range of shape, color, and texture to be expected. For each brick type, provide straps or panels containing at least four bricks. Include multiple straps for brick with a wide range. 2. Each type of patching compound in the form of briquettes, at least 3 inches (75 mm) long by 1-1/2 inches (38 mm) wide. Document each Sample with manufacturer and stock number or other information necessmy to order additional material. 3. Accessories: Each type of accessory and miscellaneous suppmi. 1.6 INFORMATIONAL SUBMITTALS Qualification Data: For brick masomy repair specialist. 1.7 QUALITY ASSURANCE Brick Masomy Repair Specialist Qualifications: Engage an experienced brick masomy repair finn to perform work of this Section. Firm shall have completed work similar in material, October 17, 2016 Brick MasomJ' Repair

3 HVA C, Roofing, Interior & Exterior Renovations- Missouri Hills Youth Center design, and extent to that indicated for this Project with a record of successful in-service perfonnance. Experience in only installing masonry is insufficient experience for masomy repair work. 1. Field Supervision: Brick masomy repair specialist firm shall maintain experienced fulltime supervisors on Project site during times that brick masomy repair work is in progress c. D. E. F. DELIVERY, STORAGE, AND HANDLING Deliver masonry units to Project site strapped together in suitable packs or pallets or in heavyduty ca1ions and protected against impact and chipping. Deliver packaged materials to Project site in manufacturer's original and unopened containers, labeled with manufacturer's name and type of products. Store cementitious materials on elevated platfonns, under cover, and in a dry location. Do not use cementitious materials that have become damp. Store hydrated lime in manufacturer's original and unopened containers. Discard lime if containers have been damaged or have been opened for more than two days. Store sand where grading and other required characteristics can be maintained and contamination avoided. Handle masonry units to prevent overstressing, chipping, defacement, and other damage. FIELD CONDITIONS Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit brick masomy repair work to be perfmmed according to product manufacturers' written instructions and specified requirements. Temperature Limits, General: Repair masomy units only when air temperature is between 40 and 90 deg F ( 4 and 32 deg C) and is predicted to remain so for at least seven days after completion of the Work unless otherwise indicated. C. Cold-Weather Requirements: Comply with the following procedures for masonry repair unless otherwise indicated: 1. When air temperature is below 40 deg F ( 4 deg C), heat mortar ingredients, masonry repair materials, and existing masonry walls to produce temperatures between 40 and 120 deg F ( 4 and 49 deg C). 2. When mean daily air temperature is below 40 deg F ( 4 deg C), provide enclosure and heat to maintain temperatures above 32 deg F (0 deg C) within the enclosure for seven days after repair. D. Hot-Weather Requirements: Protect masomy repairs when temperature and humidity conditions produce excessive evaporation of water fi:om mortar and repair materials. Provide miificial shade and wind breaks, and use cooled materials as required to minimize evaporation. Do not October 17, 2016 Brick MasomJ' Repair

4 apply mortar to substrates with temperatures of 90 deg F (32 deg C) and above unless otherwise indicated. E. For manufactured repair materials, perform work within the environmental limits set by each manufacturer. PART 2 -PRODUCTS 2.1 MATERIALS, GENERAL Source Limitations: Obtain each type of material for repairing brick masomy (brick, cement, sand, etc.) from single source with resources to provide materials of consistent quality in appearance and physical propetties. 2.2 MASONRY MATERIALS Face Brick: As required to complete brick masonry repair work. 1. Brick Matching Existing: Units with colors, color variation within units, surface texture, size, and shape that match existing brickwork. a. For existing brickwork that exhibits a range of colors or color variation within units, provide brick that proportionally matches that range and variation rather than brick that matches an individual color within that range. 2.3 MORTAR MATERIALS Pmtland Cement: ASTM C 150/C 150M, Type I or Type II, except Type III may be used for cold-weather construction; white or gray, or both where required for color matching of mortar. 1. Provide cement containing not more than 0.60 percent total alkali when tested according to ASTM C 114. Hydrated Lime: ASTM C 207, TypeS. C. Masonry Cement: ASTM C 91/C 91M. 1. Cemex S. de C.V. 2. Essroc 3. Hanson Brick and Tile 4. Holcim (US) Inc. 5. Lafarge Nmth America Inc. 6. Quikrete D. Mmtar Cement: ASTM C 1329/C 1329M. 1. Lafarge Nmth America Inc. E. Mmtar Sand: ASTM C 144. October 17, 2016 Brick Masonry Repair

5 1. Exposed Mortar: Match size, texture, and gradation of existing m01iar sand as closely as possible. Blend several sands if necessaty to achieve suitable match. 2. Colored Mortar: Natural sand or ground marble, granite, or other sound stone of color necessaty to produce required mortar color. F. Motiar Pigments: ASTM C 979/C 979M, compounded for use in mortar mixes, and having a record of satisfactory performance in masoruy mortars. 1. Davis Colors 2. LANXESS Corporation 3. Solomon Colors, Inc. 2.4 G. Water: Potable. MANUFACTURED REPAIR MATERIALS Brick Patching Compound: Fact01y-mixed cementitious product that is custom manufactured for patching brick masonry. 1. Cathedral Stone Products 2. Conproco Corporation 3. Edison Coatings, Inc. 4. Use fonnulation that is vapor and water permeable (equal to or more than the masoruy unit), exhibits low shrinkage, has lower modulus of elasticity than masoruy units being repaired, and develops high bond strength to all types of masonry. 5. Use fonnulation having working qualities and retardation control to permit fotming and sculpturing where necessary. 6. Formulate patching compound in colors and textures to match each masonry unit being patched. Provide sufficient number of colors to enable matching of the color, texture, and variation of each unit. 2.5 ACCESSORY MATERIALS Masking Tape: Nonstaining, nonabsorbent material; compatible with mortar, joint primers, sealants, and surfaces adjacent to joints; and that easily comes off entirely, including adhesive. Other Products: Select materials and methods of use based on the following: 1. Previous effectiveness in performing the work involved. 2. Minimal possibility of damaging exposed surfaces. 3. Consistency of each application. 4. Uniformity of the resulting overall appearance. 5. Do not use products or tools that could leave residue on surfaces. 2.6 MORTAR MIXES Measurement and Mixing: Measure cementitious materials and sand in a dry condition by volume or equivalent weight. Do not measure by shovel; use known measure. Mix materials in a clean, mechanical batch mixer. October 17, 2016 Brick Masonry Repair

6 HVA C, Roofing, Interior & Exterior Renovations -Missouri Hills Youth Center Colored Mortar: Produce mmiar of color required by using specified ingredients. Do not alter specified propmiions without Architect's approval. 1. Mmiar Pigments: Where mmiar pigments are indicated, do not add pigment exceeding 10 percent by weight of the cementitious or binder materials, unless otherwise demonstrated by a satisfactory histmy of perfmmance. C. Do not use admixtures in mmiar unless otherwise indicated. D. Mixes: Mix mortar materials in the following propmiions: 1. Rebuilding (Setting) Mmiar by Type: ASTM C 270, Proportion Specification, Type N unless otherwise indicated; with cementitious material limited to pmiland cement and lime masonry cement or mortar cement. 2. Pigmented, Colored Mortar: Add mortar pigments to produce exposed, setting (rebuilding) mmiar of colors required to match existing motiar color. PART 3 -EXECUTION 3.1 PROTECTION Prevent motiar from staining face of surrounding masomy and other surfaces. 1. Cover sills, ledges, and other projecting items to protect them from mortar droppings. 2. Keep wall area wet below rebuilding and repair work to discourage mortar from adhering. 3. Immediately remove mortar splatters in contact with exposed masomy and other surfaces. 3.2 MASONRY REPAIR, GENERAL Appearance Standard: Repaired surfaces are to have a uniform appearance as viewed from 20 feet (6 m) away by Architect. 3.3 BRICK REMOVAL AND REPLACEMENT At locations indicated, remove bricks that are damaged, spalled, or deteriorated. Carefully remove entire units from joint to joint, without damaging sunounding masonry, in a manner that permits replacement with full-size units. 1. When removing single bricks, remove material from center of brick and work toward outside edges. Suppmi and protect remaining masonry that surrounds removal area. C. Maintain flashing, reinforcement, lintels; and adjoining construction in an undamaged condition. D. NotifY Architect of unforeseen detrimental conditions including voids, cracks, bulges, and loose units in existing masonry backup, rotted wood, rusted metal, and other deteriorated items. E. Clean masomy surrounding removal areas by removing mortar, dust, and loose pmiicles in preparation for brick replacement. October 17, 2016 Brick MasomJ' Repair

7 F. Replace removed damaged brick with new brick matching existing brick. Do not use broken units unless they can be cut to usable size. G. Install replacement brick into bonding and coursing pattern of existing brick If cutting is required, use a motor-driven saw designed to cut masonry with clean, sharp, unchipped edges. 1. Maintain joint width for replacement units to match existing joints. H. Lay replacement brick with rebuilding (setting) mortar and with completely filled bed, head, and collar joints. Butter ends with enough mortar to fill head joints and shove into place. Wet both replacement and surrounding bricks that have ASTM C 67 initial rates of absorption (suction) of more than 30 g/30 sq. in. per min. (30 g/194 sq. em per min.) Use wetting methods that ensure that units are nearly saturated but surface is dry when laid. 1. Tool exposed mmiar joints in repaired areas to match joints of surrounding existing brickwork. 2. When mortar is hard enough to suppmi units, remove shims and other devices interfering with pointing of joints. I. Curing: Cure mortar by maintaining in thoroughly damp condition for at least 72 consecutive hours, including weekends and holidays. 1. Hairline cracking within the mortar or mmiar separation at edge of a joint is unacceptable. Completely remove such mmiar and repoint. 3.4 MASONRY UNIT PATCHING Patch the following masonry units unless another type of repair or replacement is indicated: 1. Units with holes. 2. Units with chipped edges or corners. Patch chipped edges or corners measuring more than 3/4 inch (19 mm) in least dimension. 3. Units with small areas of deep deterioration. Patch deep deteriorations measuring more than 3/4 inch (19 mm) in least dimension and more than 1/4 inch (6 mm) deep. Patching Bricks: 1. Remove loose material from masoruy surface. Carefully remove additional material so patch does not have feathered edges but has square or slightly undercut edges on area to be patched and is at least 114 inch (6 mm) thick, but not less than recommended in writing by patching compound manufacturer. 2. Mask adjacent mortar joint or rake out for repainting if patch extends to edge of masoruy unit. 3. Mix patching compound in individual batches to match each unit being patched. Combine one or more colors of patching compound, as needed, to produce exact match. 4. Rinse surface to be patched and leave damp, but without standing water. 5. Brush-coat surfaces with sluny coat of patching compound according to manufacturer's written instructions. 6. Place patching compound in layers as recommended in writing by patching compound manufacturer, but not less than 1/4 inch (6 mm) or more than 2 inches (50 mm) thick Roughen surface of each layer to provide a key for next layer. October 17, 2016 Brick Masonry Repair

8 HV A C, Roofing, Interior & Exterior Renovations- Missouri Hills Youth Center 7. Trowel, scrape, or carve surface of patch to match texture and surrounding surface plane or contour of masomy unit. Shape and finish surface before or after curing, as determined by testing, to best match existing masomy unit. 8. Keep each layer damp for 72 hours or until patching compound has set. 9. Remove and replace patches with hairline cracks or that show separation from brick at edges, and those that do not match adjoining brick in color or texture. 3.5 FINAL CLEANING After motiar has fully hardened, thoroughly clean exposed masomy surfaces of excess mortar and foreign matter; use wood scrapers, stiff-nylon or -fiber brushes, and clean water applied by low-pressure spray. 1. Do not use metal scrapers or brushes. 2. Do not use acidic or alkaline cleaners. Remove masking materials, leaving no residues that could trap dirt. 3.6 MASONRY WASTE DISPOSAL Salvageable Materials: Unless othetwise indicated, excess masomy materials are Contractor's property. Masonry Waste: Remove masomy waste and legally dispose of off Owner's propetiy. END OF SECTION October 17, 2016 Brick Masonry Repair

9 SECTION BRICK MASONRY REPOINTING PART 1 - GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementmy Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY Section Includes: 1. Repointing joints with mortar. 1.3 DEFINITIONS Low-Pressure Spray: 100 to 400 psi (690 to 2750 kpa); 4 to 6 gpm (0.25 to 0.4 Lis). 1.4 SEQUENCING AND SCHEDULING Order sand and gray pmiland cement for pointing mortar immediately after approval of Samples. Take delivety of and store at Project site enough quantity to complete Project. Work Sequence: Perform brick masomy repointing work in the following sequence, which includes work specified in this and other Sections: 1. Remove plant growth. 2. Inspect masomy for open mortar joints and permanently or temporarily point them before cleaning to prevent the intmsion of water and other cleaning materials into the wall. 3. Clean masonry. 4. Rake out mmiar from joints surrounding masomy to be replaced and from joints adjacent to masomy repairs along joints. 5. Repair masonry, including replacing existing masomy with new masonry materials. 6. Rake out mortar from joints to be repointed. 7. Point mmiar and sealant joints. 8. After repairs and repointing have been completed and cured, perform a final cleaning to remove residues from this work. 9. Where water repellents are to be used on or near masomy work, delay application of these chemicals until after pointing and cleaning. c. As scaffolding is removed, patch anchor holes used to attach scaffolding. Patch holes in masonry units according to Section "Brick Masomy Repair." Patch holes in mortar joints according to "Repointing Masomy" Article. 1.5 SUBMITTALS Product Data: For each type of product. 1. Include constmction details, material descriptions, dimensions of individual components and profiles, and finishes. October 17, 2016 Brick Masonry Repointing

10 HVA C, Roofing, Interior & Exterior Renovations- Missouri Hills Youth Center 2. Include recommendations for product application and use. Include test data substantiating that products comply with requirements. Shop Drawings: 1. Include plans, elevations, sections, and locations of repointing work on the structure. C. Samples for Initial Selection: For the following: 1. Pointing Mortar: Submit sets of mortar for pointing in the form of sample mortar strips, 6 inches (150 mm) long by 1/4 inch (6 mm) 1/2 inch (13 mm) wide, set in aluminum or plastic channels. a. Have each set contain a close color range of at least six samples of different mixes of colored sands and cements that produce a mortar matching existing, cleaned mortar when cured and dty. b. Submit with precise measurements on ingredients, proportions, gradations, and source of colored sands from which each Sample was made. 2. Sand Type Used for Pointing Mortar: Minimum 8 oz. (240 ml) of each in plastic screwtop jars. 3. Include similar Samples of accessories involving color selection. D. Samples for Verification: For the following: 1. Each type, color, and texture of pointing mortar in the form of sample mortar strips, 6 inches (150 mm) long by 1/4 inch (6 mm) 1/2 inch (13 mm) wide, set in aluminum or plastic channels. a. Include with each Sample a list of ingredients with proportions of each. Identify sources, both supplier and quany, of each type of sand and brand names. of cementitious materials and pigments if any. 2. Accessories: Each type of accessory and miscellaneous suppoti. 1.6 INFORMATIONAL SUBMITTALS Qualification Data: For brick masomy repointing specialist. 1.7 QUALITY ASSURANCE Brick Masomy Repointing Specialist Qualifications: Engage an experienced brick masonry repointing firm to perform work of this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this Project with a record of successful inservice performance. Experience in only installing masomy is insufficient experience for masomy repointing work. 1. Field Supervision: Brick masonry repointing specialist firms shall maintain experienced full-time supervisors on Project site during times that brick masonry repointing work is in progress. October 17, 2016 Brick Masonry Repointing

11 Quality-Control Program: Prepare a written quality-control program for this Project to systematically demonstrate the ability of personnel to properly follow methods and use materials and tools without damaging masomy. Include provisions for supervising performance and preventing damage. 1.8 c. D. 1.9 DELIVERY, STORAGE, AND HANDLING Deliver packaged materials to Project site in manufacturer's original and unopened containers, labeled with manufacturer's name and type of products. Store cementitious materials on elevated platforms, under cover, and in a dty location. Do not use cementitious materials that have become damp. Store hydrated lime in manufacturer's original and unopened containers. Discard lime if containers have been damaged or have been opened for more than two days. Store sand where grading and other required characteristics can be maintained and contamination avoided. FIELD CONDITIONS Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit repainting work to be performed according to product manufacturers' written instructions and specified requirements. Temperature Limits, General: Repoint mortar joints only when air temperature is between 40 and 90 deg F (4 and 32 deg C) and is predicted to remain so for at least seven days after completion of the Work unless otherwise indicated. C. Cold-Weather Requirements: Comply with the following procedures for mortar-joint pointing unless othetwise indicated: 1. When air temperature is below 40 deg F (4 deg C), heat motiar ingredients and existing masomy walls to produce temperatures between 40 and 120 deg F (4 and 49 deg C). 2. When mean daily air temperature is below 40 deg F (4 deg C), provide enclosure and heat to maintain temperatures above 32 deg F (0 deg C) within the enclosure for seven days after pointing. D. Hot-Weather Requirements: Protect mmiar-joint pointing when temperature and humidity conditions produce excessive evaporation of water from mortar materials. Provide miificial shade and wind breaks, and use cooled materials as required to minimize evaporation. Do not apply mmiar to substrates with temperatures of 90 deg F (32 deg C) and above unless otherwise indicated. PART 2 -PRODUCTS 2.1 MATERIALS, GENERAL Source Limitations: Obtain each type of material for repainting brick masomy (cement, sand, etc.) from single source with resources to provide materials of consistent quality in appearance and physical properties. October 17, 2016 Brick Masonry Repainting

12 2.2 MORTARMATERIALS Pmtland Cement: ASTM C 150/C 150M, Type I or Type II, except Type III may be used for cold-weather constmction; white or gray, or both where required for color matching ofmmtar. 1. Provide cement containing not more than 0.60 percent total alkali when tested according to ASTM C 114. Hydrated Lime: ASTM C 207, TypeS. C. Masonry Cement: ASTM C 91/C 91M. 1. Cemex S. de C.V. 2. Essroc 3. Hanson Brick and Tile 4. Holcim (US) Inc. 5. Lafarge Nmth America Inc. 6. Quikrete D. Mmtar Cement: ASTM C 1329/C 1329M. 1. Lafarge Nmth America Inc. E. Mortar Sand: ASTM C Match size, texture, and gradation of existing mmtar sand as closely as possible. Blend several sands if necessary to achieve suitable match. 2. Color: Natural sand or ground marble, granite, or other sound stone of color necessary to produce required mortar color. F. Mmtar Pigments: ASTM C 979/C 979M, compounded for use in mortar mixes, and having a record of satisfactory performance in masonry mortars. 1. Davis Colors 2. LANXESS Corporation 3. Solomon Colors, Inc. G. Water: Potable. 2.3 MORTAR MIXES Measurement and Mixing: Measure cementitious materials and sand in a dry condition by volume or equivalent weight. Do not measure by shovel; use known measure. Mix materials in a clean, mechanical batch mixer. 1. Mixing Pointing Mortar: Thoroughly mix cementitious materials and sand together before adding any water. Then mix again, adding only enough water to produce a damp, unworkable mix that retains its form when pressed into a ball. Maintain mortar in this dampened condition for 15 to 30 minutes. Add remaining water in small portions until mortar reaches desired consistency. Use mortar within one hour of final mixing; do not retemper or use partially hardened material. October 17, 2016 Brick Masonry Repainting

13 Colored Mmiar: Produce mmiar of color required by using specified ingredients. Do not alter specified propmiions without Architect's approval. 1. Mmiar Pigments: Where mmiar pigments are indicated, do not add pigment exceeding 10 percent by weight of the cementitious or binder materials, unless otherwise demonstrated by a satisfactory histmy of perfonnance. C. Do not use admixtures in mmiar unless otherwise indicated. D. Mixes: Mix mortar materials in the following propmiions: 1. Pointing Mmiar by Type: ASTM C 270, Propmiion Specification, Type N unless otherwise indicated; with cementitious material limited to pmiland cement and lime masomy cement or mmiar cement. Add mortar pigments to produce mmiar colors required. PART 3- EXECUTION 3.1 PROTECTION Prevent mmiar from staining face of surrounding masomy and other surfaces. 1. Cover sills, ledges, and other projecting items to protect them from mmiar droppings. 2. Keep wall area wet below pointing work to discourage mmiar from adhering. 3. Immediately remove mortar splatters in contact with exposed masonry and other surfaces. Remove gutters and downspouts and associated hardware adjacent to masomy and store during masomy repainting. Reinstall when repainting is complete. 1. Provide tempormy rain drainage during work to direct water away fl om building. 3.2 MASONRY REPOINTING, GENERAL Appearance Standard: Repainted surfaces are to have a uniform appearance as viewed from 20 feet (6 m) away by Architect. 3.3 REPOINTING MASONRY Rake out and repaint joints to the following extent: 1. All joints in areas indicated. 2. Joints at locations of the following defects: a. Holes and missing mortar. b. Cracks that can be penetrated 1/4 inch (6 mm) or more by a knife blade inch (0.7 mm) thick. c. Cracks 1116 inch ( 1.6 mm) or more in width and of any depth. d. Hollow-sounding joints when tapped by metal object. e. Eroded surfaces 114 inch (6 mm) or more deep. f. Deterioration to point that mortar can be easily removed by hand, without tools. g. Joints filled with substances other than mortar. October 17, 2016 Brick Masonry Repointing

14 Do not rake out and repoint joints where not required. C. Rake out joints as follows, according to procedures: 1. Remove mortar from joints to depth of joint width plus 1/8 inch (3 mm), but not less than 1/2 inch (13 mm) or not less than that required to expose sound, unweathered mortar. Do not remove unsound mortar more than 2 inches (50 mm) deep; consult Architect for direction. 2. Remove mortar from masomy surfaces within raked-out joints to provide reveals with square backs and to expose masomy for contact with pointing mmtar. Brnsh, vacuum, or flush joints to remove dirt and loose debris. 3. Do not spall edges ofmasomy units or widen joints. Replace or patch damaged masomy units as directed by Architect. D. Notify Architect of unforeseen detrimental conditions including voids in mortar joints, cracks, loose masomy units, rotted wood, rnsted metal, and other deteriorated items. E. Pointing with Mmtar: Rinse joint surfaces with water to remove dust and mortar particles. Time rinsing application so, at time of pointing, joint surfaces are damp but free of standing water. If rinse water dries, dampen joint surfaces before pointing. Apply pointing mortar first to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8 inch (9 mm) until a unifonn depth is fonned. Fully compact each layer, and allow it to become thumbprint hard before applying next layer. After deep areas have been filled to same depth as remaining joints, point joints byplacing mortar in layers not greater than 3/8 inch (9 mm). Fully compact each layer and allow to become thumbprint hard before applying next layer. Where existing masomy units have worn or rounded edges, slightly recess finished mortar surface below face of masomy to avoid widened joint faces. Take care not to spread mortar beyond joint edges onto exposed masonry surfaces or to featheredge the mortar. When mortar is thumbprint hard, tool joints to match original appearance of joints as demonstrated in approved mockup. Remove excess mortar from edge of joint by brnshing. Cure mmtar by maintaining in thoroughly damp condition for at least 72 consecutive hours, including weekends and holidays. Hairline cracking within mortar or mortar separation at edge of a joint is unacceptable. Completely remove such mmtar and repoint. October 17, 2016 Brick Masomy Repointing

15 3.4 FINAL CLEANING After mmiar has fully hardened, thoroughly clean exposed masonry surfaces of excess mortar and foreign matter; use wood scrapers, stiff-nylon or -fiber brushes, and clean water applied by low-pressure spray. 1. Do not use metal scrapers or brushes. 2. Do not use acidic or alkaline cleaners. Remove masking materials, leaving no residues that could trap dirt. END OF SECTION October 17, 2016 Brick Masonry Repointing

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17 SECTION GLASS UNIT MASONRY PART 1 - GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementmy Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY Section Includes: 1. Glass block set in mortar. 1.3 SUBMITTALS Product Data: For each type of product. Shop Drawings: Show fabrication and installation details for glass unit masomy, including vertical and horizontal coursing, anchors, reinforcement, and expansion strips. C. Samples for Verification: Glass-block units and joint materials involving color selection. 1. Provide Samples for each fmm, pattem, and color of glass block and color of joint material to match existing. 1.4 DELIVERY, STORAGE, AND HANDLING c. D. Store glass block in unopened cations on elevated platfmms, under cover, and in a dry location. If units are not stored in an enclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied. Store cementitious materials on elevated platfonns, under cover, and in a dry location. Do not use cementitious materials that have become damp. Store aggregates where grading and other required characteristics can be maintained and contamination avoided. Store accessories, including metal items, to prevent corrosion and accumulation of dhi and oil. 1.5 FIELD CONDITIONS Environmental Limitations: Proceed with installation of glass unit masonry assemblies only when ambient and material temperatures are 40 deg F (5 deg C) or higher. 1. Maintain temperature in installation areas at 40 deg F (5 deg C) or above for 48 hours after installing. October 17, 2016 Glass Unit MasomJ'

18 HV A C, Roofing, Interior & Exterior Renovations- Missouri Hills Youth Center PART 2 -PRODUCTS 2.1 MANUFACTURERS Source Limitations for Glass Block: Obtain each type and pattem of glass block from single source from single manufacturer. Source Limitations for Accessory Materials: Obtain each cementitious material admixture and accessory component through single source from single manufacturer and each aggregate from single source or producer. 2.2 GLASS BLOCK Hollow Glass Block: Hollow units made from transparent glass, with manufacturer's standard edge coating. 1. Pittsburgh Coming Corporation 2. J. Week GmbH & Co. KG 3. Serves 4. Mulia Inc. 5. Glass Color: To match existing. 6. Pattem: Smooth, undistorted inner and outer faces. 7. Pattem: Prismatic pyramid, light-diffusive design on inner faces, and smooth outer faces. 8. Edge-Coating Color: To match existing. a. Provide one color throughout for each pattem indicated. 9. Sizes: Manufacturer's standard sizes corresponding to nominal sizes to match existing. 2.3 MORTAR MATERIALS c. Portland Cement: ASTM C 150/C 150M, Type!..Provide color to match existing. Hydrated Lime: ASTM C 207, TypeS. Aggregate: ASTM C 144, with 100 percent passing No. 8 (2.36-mm) sieve. 1. For joints narrower than 1/4 inch (6 mm), use aggregate graded with 100 percent passing No. 16 (1.18-mm) sieve. 2. White Aggregates: Natural white sand or cmshed white stone. D. E. Water-Repellent Admixture: Liquid polymeric water-repellent mortar admixture that does not reduce flexural bond strength of mmiar. Water: Potable. 2.4 MORTAR MIXES General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, or antifreeze compounds unless otherwise indicated. October 17, 2016 Glass Unit MasolliJ'

19 1. Do not use calcium chloride in mortar. 2. For mo1iar in exterior panels, use water-repellent admixture according to admixture manufacturer's written instructions. Mortar for Glass Unit Masomy Assemblies: Comply with ASTM C 270, Proportion Specification for Type S mmiar. 1. Combine and thoroughly mix cementitious materials, water, and aggregates in a mechanical batch mixer unless otherwise indicated. Mix mmiar to produce a stiff but workable consistency that is drier than mortar for brick or concrete masomy. Discard mortar when it has reached initial set. C. Colored-Aggregate Mmiar: Produce required mortar color by using colored aggregates and natural color or white cement as necessmy to produce required mmiar color. 1. Mix to match existing. PART 3- EXECUTION 3.1 EXAMINATION Examine sills, jambs, and heads surrounding glass unit masomy assemblies, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work. Proceed with installation only after unsatisfactmy conditions have been conected. 3.2 INSTALLING GLASS BLOCK WITH MORTAR c. Set glass block with completely filled bed and head joints, with no furrowing, accurately spaced and coordinated with other construction. Maintain exposed joint widths to match existing unless otherwise indicated. Use rubber mallet to tap units into position. Do not use steel tools, and do not allow units to come into contact with metal accessories and frames. Use plastic spacers or tempormy wedges in mmiar joints to produce unifonn joint widths and to prevent mortar from being squeezed out of joints. 1. If tempora1y wedges are used, remove them after mortar has set and fill voids with mortar. D. Clean glass unit masonry assemblies as work progresses. Remove mortar fins and smears immediately, using a clean, wet sponge or a scrub brush with stiff fiber bristles. Do not use harsh cleaners, acids, abrasives, steel wool, or wire brushes when removing mmiar or cleaning glass unit masomy assemblies. E. Install sealant at jambs, heads, mullions, and other locations indicated. Prepare joints, including installation of primer and bond-breaker tape or cylindrical sealant backing, and apply elastomeric sealants to comply with requirements in Section "Joint Sealants." October 17, 2016 Glass Unit Masomy

20 HVA C, Roofing, Interior & Exterior Renovations- Missouri Hills Youth Center F. Constmction Tolerances: Set glass block to comply with the following tolerances: 1. Variation from Plumb: For vertical lines and surfaces, do not exceed 1/4 inch in 10 feet (6 mm in 3m). 2. Variation from Level: For bed joints and other conspicuous lines, do not exceed 1/8 inch in 10 feet (3 1mn in 3 m) or more. 3. Variation of Location in Plan: For location of elements in plan, do not vmy from that indicated by more than plus or minus 1/4 inch (6 mm). 4. Variation in Mortar-Joint Thickness: Do not vaty from joint thiclmess indicated by more than plus or minus 1116 inch (1.5 tmn). 5. For faces of adjacent exposed units, do not vaty from flush alignment by more than 1/16 inch (1.5 mm). 3.3 c. CLEANING On surfaces adjacent to glass unit masonry assemblies, remove mortar, sealants, and other residue resulting from glass-block installation, in a manner approved by manufacturers of materials involved. Remove excess sealants with cmmnercial solvents according to sealant manufacturer's written instmctions. Exercise care not to damage sealant in joints. Perfonn final cleaning of glass unit masonry assemblies when surface is not exposed to direct sunlight. Stmi at top of panel using generous amounts of clean water. Remove water with clean, dty, soft cloths; change cloths frequently to eliminate dried mortar particles and aggregate. END OF SECTION October 17, 2016 Glass Unit Masonry