HomeMy WebLinkAbout04 72 13 Thin Veneer Cast Stone MasonryTHE KENT
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SECTION 04 72 13 – THIN VENEER CAST STONE MASONRY
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Thin cast stone veneer units applied to concrete walls, masonry walls and wood framed
walls.
2. Mortar.
3. Miscellaneous masonry accessories.
B. Related Requirements:
1. Section 04 20 00 "Unit Masonry" for concrete masonry unit construction.
2. Section 06 10 00 “Rough Carpentry” for wood frame construction.
3. Section 06 16 00 “Sheathing” for wood frame construction.
4. Section 07 62 00 "Sheet Metal Flashing and Trim" for exposed sheet metal flashing and
for furnishing manufactured reglets installed in masonry joints.
5. Section 07 92 00 “Joint Sealants.”
1.3 PRE-INSTALLATION MEETINGS
A. Pre-installation Conference: Conduct conference at Project site.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product:
1. For thin veneer cast-stone units, include construction details, material descriptions,
dimensions of individual components and profiles and finishes.
B. Shop Drawings: For the following:
1. Thin Stone Veneer Units: Show sizes, profiles, and locations of each thin stone veneer
unit required.
2. Fabricated Flashing: Detail corner units, end-dam units, and other special applications.
C. Samples for Initial Selection:
1. Thin stone veneer units.
2. Colored mortar.
D. Samples for Verification: For each type and color of the following:
1. Thin stone veneer units.
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2. Pigmented and colored-aggregate mortar. Make Samples using same sand and mortar
ingredients to be used on Project.
E. Warranty: Submit manufacturer’s standard warranty for natural thin veneer stone.
1.5 INFORMATIONAL SUBMITTALS
A. List of Materials Used in Constructing Mockups: List generic product names together with
manufacturers, manufacturers' product names, model numbers, lot numbers, batch numbers,
source of supply, and other information as required to identify materials used. Include mix
proportions for mortar and grout and source of aggregates.
1. Submittal is for information only. Receipt of list does not constitute approval of deviations
from the Contract Documents unless such deviations are specifically brought to the
attention of Architect and approved in writing.
B. Material Certificates: For each type and size of the following:
1. Thin stone veneer units.
a. Include data on material properties and material test reports substantiating
compliance with requirements.
2. Cementitious materials. Include name of manufacturer, brand name, and type.
3. Mortar admixtures.
4. Preblended, dry mortar mixes. Include description of type and proportions of ingredients.
5. Anchors, ties, and metal accessories.
C. Mix Designs: For each type of mortar. Include description of type and proportions of ingredients.
1. Include test reports for mortar mixes required to comply with property specification. Test
according to ASTM C 109 for compressive strength, ASTM C 1506 for water retention,
and ASTM C 91 for air content.
D. Material Test Reports: For each mix required to produce thin veneer cast stone, based on
testing according to ASTM C 1364, including test for resistance to freezing and thawing.
E. Cold-Weather and Hot-Weather Procedures: Detailed description of methods, materials, and
equipment to be used to comply with requirements.
1.6 QUALITY ASSURANCE
A. Manufacturer’s Qualifications: Refer to Specification Section 01 40 00 “Quality Requirements.”
B. Mockups: Build mockups, if requested in writing by Architect, to verify selections made under
Sample submittals, to demonstrate aesthetic effects, and to set quality standards for materials
and execution.
1. Build mockup of typical wall area as shown on Drawings.
a. Include a sealant-filled joint at least 16 inches long in mockup.
b. Include wood studs, sheathing, sheathing joint-and-penetration treatment, air
barrier and flashing in wood framed exterior thin veneer stone masonry wall
mockup.
2. Clean one-half of exposed faces of mockups with masonry as indicated.
3. Protect accepted mockups from the elements with weather-resistant membrane.
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4. Approval of mockups is for color, texture, and blending of masonry units; relationship of
mortar and sealant colors to masonry unit colors; tooling of joints; and aesthetic qualities
of workmanship.
a. Approval of mockups is also for other material and construction qualities
specifically approved by Architect in writing.
b. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such
deviations in writing.
5. Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.7 DELIVERY, STORAGE, AND HANDLING
A. Coordinate delivery of cast stone veneer with related masonry work to avoid delaying the Work
and to minimize the need for on-site storage.
B. Pack, handle and ship thin veneer cast stone units in suitable packs or pallets.
1. Lift with wide-belt slings; do not use wire rope or ropes that may cause staining. Move
thin veneer cast stone units if required, using dollies with wood supports.
2. Store thin veneer cast-stone units on wood skids or pallets with non-staining, waterproof
covers, securely tied. Arrange to distribute weight evenly and to prevent damage to units.
Ventilate under covers to prevent condensation.
C. Store thin veneer cast-stone components in accordance with manufacturer’s instructions.
D. Store cementitious materials on elevated platforms, under cover and in a dry location. Do not
use cementitious materials that have become damp.
E. Store mortar aggregates where grading and other required characteristics can be maintained
and contamination can be avoided.
1.8 FIELD CONDITIONS
A. Protection of Masonry: During construction, cover tops of veneer, projections, and sills with
waterproof sheeting at end of each day's work. Cover partially completed masonry when
construction is not in progress.
1. Extend cover a minimum of 24 inches down face of veneer, and hold cover securely in
place.
B. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry. Immediately
remove grout, mortar, and soil that contacts masonry.
1. Protect base of walls from rain-splashed mud and from mortar splatter by spreading
coverings on ground and over wall surface.
2. Protect sills, ledges, and projections from mortar droppings.
3. Protect surfaces of window and door frames, as well as similar products with painted and
integral finishes, from mortar droppings.
4. Turn scaffold boards near the wall on edge at the end of each day to prevent rain from
splashing mortar and dirt onto completed masonry.
C. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice
or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost
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or by freezing conditions. Comply with cold-weather construction requirements contained in
TMS 602/ACI 530.1/ASCE 6.
1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40
deg F and higher and will remain so until masonry has dried, but not less than seven
days after completing cleaning.
D. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in
TMS 602/ACI 530.1/ASCE 6.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Source Limitations for Thin Veneer Stone Masonry Units: Obtain exposed masonry units of a
uniform texture and color, or a uniform blend within the ranges accepted for these
characteristics, from single source from single manufacturer for each product required.
B. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including
color for exposed masonry, from single manufacturer for each cementitious component and
from single source or producer for each aggregate.
2.2 THIN VENEER CAST STONE MATERIALS
A. General: Comply with ASTM C 1364.
B. Portland Cement: ASTM C 150, Type I, containing not more than 0.60 percent total alkali when
tested according to ASTM C 114. Provide natural color or white cement as required to produce
cast-stone color indicated.
C. Coarse Aggregates: Granite, quartz, or limestone complying with ASTM C 33; gradation and
colors as needed to produce required cast-stone textures and colors.
D. Fine Aggregates: Natural sand or crushed stone complying with ASTM C 33, gradation and
colors as needed to produce required cast-stone textures and colors.
E. Color Pigment: ASTM C 979, synthetic mineral-oxide pigments or colored water-reducing
admixtures; color stable, nonfading, and resistant to lime and other alkalis.
F. Admixtures: Use only admixtures specified or approved in writing by Architect.
1. Do not use admixtures that contain more than 0.1 percent water-soluble chloride ions by
mass of cementitious materials. Do not use admixtures containing calcium chloride.
2. Use only admixtures that are certified by manufacturer to be compatible with cement and
other admixtures used.
3. Air-Entraining Admixture: ASTM C 260. Add to mixes for units exposed to the exterior at
manufacturer's prescribed rate to result in an air content of 4 to 6 percent, except do not
add to zero-slump concrete mixes.
4. Water-Reducing Admixture: ASTM C 494, Type A.
5. Water-Reducing, Retarding Admixture: ASTM C 494, Type D.
6. Water-Reducing, Accelerating Admixture: ASTM C 494, Type E.
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G. Embedded Anchors and Other Inserts: Fabricated from stainless steel complying with
ASTM A 240, ASTM A 276, or ASTM A 666, Type 304.
2.3 THIN VENEER CAST-STONE UNITS
A. Manufacturers: Subject to compliance with requirements, the following manufacturer offers
products that are the basis for design and may be incorporated into the Work:
1. Custom Cast Stone; 734 E. 169th
St., Westfield, IN. 46074; tel.: 317.896.1700.
B. Cast-Stone Units: Comply with ASTM C 1364.
1. Units shall be manufactured using the vibrant dry tamp or wet-cast method.
2. Units shall be resistant to freezing and thawing as determined by laboratory testing
according to ASTM C 666, Procedure A, as modified by ASTM C 1364.
C. Fabricate units with sharp arris and accurately reproduced details, with indicated texture on all
exposed surfaces unless otherwise indicated.
1. Slope exposed horizontal surfaces 1:12 to drain unless otherwise indicated.
2. Provide raised fillets at backs of sills and at ends indicated to be built into jambs.
3. Provide drips on projecting elements unless otherwise indicated.
D. Fabrication Tolerances:
1. Variation in Cross Section: Do not vary from indicated dimensions by more than 1/8 inch.
2. Variation in Length: Do not vary from indicated dimensions by more than 1/360 of the
length of unit or 1/8 inch, whichever is greater, but in no case by more than 1/4 inch.
3. Warp, Bow, and Twist: Not to exceed 1/360 of the length of unit or 1/8 inch, whichever is
greater.
4. Location of Grooves, False Joints, Holes, Anchorages, and Similar Features: Do not vary
from indicated position by more than 1/8 inch on formed surfaces of units and 3/8 inch on
unformed surfaces.
E. Cure Units as Follows:
1. Cure units in enclosed, moist curing room at 95 to 100 percent relative humidity and
temperature of 100 deg F for 12 hours or 70 deg F for 16 hours.
2. Keep units damp and continue curing to comply with one of the following:
a. No fewer than five days at mean daily temperature of 70 deg F or above.
b. No fewer than six days at mean daily temperature of 60 deg F or above.
F. Acid etch units after curing to remove cement film from surfaces to be exposed to view.
G. Colors and Textures: As selected by Architect from manufacturer's full range.
2.4 MORTAR MATERIALS
A. Masonry Cement: ASTM C 91.
1. Products: Subject to compliance with requirements, provide the following product.
Products that meet the requirements of the listed product and are approved:
a. Essroc, Italcementi Group; i.tech Stone - Hold.
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B. Premixed Veneer Masonry Mortar: ASTM C 1714 and ASTM C 270. Polymer modified adhered
veneer mortar for use in bonding adhered manufactured stone veneer, natural thin cut stone
and thin brick to a cementitious substrate.
1. Products: Subject to compliance with requirements provide the following product:
a. Spec Mix/ Quickcrete; Polymer Modified Adhered Veneer Mortar.
C. Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use
in mortar mixes and complying with ASTM C 979. Use only pigments with a record of
satisfactory performance in masonry mortar.
1. Products: Subject to compliance with requirements, provide one of the following:
a. Davis Colors; True Tone Mortar Colors.
b. Lanxess Corporation; Bayferrox Iron Oxide Pigments.
c. Solomon Colors; SGS Mortar Colors.
D. Water: Potable.
2.5 EMBEDDED FLASHING MATERIALS
A. Metal Flashing: Provide metal flashing complying with Section 04 20 00 “Unit Masonry” and
Section 07 62 00 "Sheet Metal Flashing and Trim."
B. Application: Unless otherwise indicated, use the following:
1. Where flashing is indicated to receive counter flashing, use metal flashing.
2. Where flashing is indicated to be turned down at or beyond the wall face, use metal
flashing.
3. Where flashing is partly exposed and is indicated to terminate at the wall face, use metal
flashing with a drip edge.
4. Where flashing is fully concealed, use flexible flashing.
C. Sealants for Sheet Metal Flashings:
1. Elastomeric Sealant: ASTM C 920, chemically curing urethane sealant; of type, grade,
class, and use classifications required to seal joints in sheet metal flashing and remain
watertight.
D. Adhesives, Primers, and Seam Tapes for Flashings: Flashing manufacturer's standard products
or products recommended by flashing manufacturer for bonding flashing sheets to each other
and to substrates.
E. Termination Bars for Flexible Flashing: Stainless steel sheet 0.019 inch by 1-1/2 inches with a
3/8-inch sealant flange at top.
F. Aluminum Drip Edge: Refer to Specification Section 07 62 00 “Sheet Metal and Trim.”
2.6 MISCELLANEOUS MASONRY ACCESSORIES
A. Compressible Filler: Premolded filler strips complying with ASTM D 1056, Grade 2A1;
compressible up to 35 percent; of width and thickness indicated; formulated from neoprene
urethane or PVC.
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B. Anchors: Type and size indicated, fabricated from Type 304 stainless steel complying with
ASTM A 240, ASTM A 276, or ASTM A 666.
C. Dowels: 1/2-inch- diameter round bars, fabricated from Type 304 stainless steel complying with
ASTM A 240, ASTM A 276, or ASTM A 666.
D. Sealants: Refer to Specification section 07 92 00 Joint Sealants,” Subsection 2.3.D.
E. Proprietary Acidic Cleaner: Manufacturer's standard-strength cleaner designed for removing
mortar/grout stains, efflorescence, and other new construction stains from new masonry without
discoloring or damaging masonry surfaces. Use product expressly approved for intended use by
cast-stone manufacturer and expressly approved by cleaner manufacturer for use on cast stone
and adjacent masonry materials.
2.7 MORTAR MIXES
A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators,
retarders, water-repellent agents, antifreeze compounds, or other admixtures unless otherwise
indicated.
1. Do not use calcium chloride in mortar or grout.
2. Use masonry cement mortar unless otherwise indicated.
3. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to
view, regardless of weather conditions, to ensure that mortar color is consistent.
B. Preblended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a preblended mix.
Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients
before delivering to Project site.
C. Pigmented Mortar: Use colored cement product or select and proportion pigments with other
ingredients to produce color required. Do not add pigments to colored cement products.
1. Pigments shall not exceed 10 percent of portland cement by weight.
2. Pigments shall not exceed 5 percent of masonry cement or mortar cement by weight.
3. Mix to match Architect's sample.
4. Application: Use pigmented mortar for exposed mortar joints.
D. Colored-Aggregate Mortar: Produce required mortar color by using colored aggregates and
natural color or white cement as necessary to produce required mortar color.
1. Mix to match Architect's sample.
2. Application: Use colored aggregate mortar for exposed mortar joints.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine conditions, with Installer present, for compliance with requirements for installation
tolerances and other conditions affecting performance of the Work.
1. Examine cast stone veneer components for fit and finish before installation.
2. Do not begin installation until backing structure is plumb, bearing surfaces are level and
substrates are clean and properly prepared.
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3. For the record, prepare written report, endorsed by Installer, listing conditions detrimental
to performance of the Work.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION, GENERAL
A. Install thin veneer stone and mortar in accordance with manufacturer’s written instructions and
ACI 530.1/ASCE6/TMS 602.
B. Leave openings for equipment to be installed before completing masonry. After installing
equipment, complete masonry to match the construction immediately adjacent to opening.
C. Use full-size units without cutting if possible. If cutting is required to provide a continuous
pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp,
unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut
units with cut surfaces and, where possible, cut edges concealed.
D. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and
textures. Mix units from several pallets or cubes as they are placed.
E. Install plastic drip edges, weep screeds and termination beads at opening heads, wall bases
and control joints.
3.3 LAYING MASONRY WALLS - GENERAL
A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint
thicknesses and for accurate location of openings, movement-type joints, returns, and offsets.
Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at
other locations.
B. Bond Pattern for Exposed Masonry: Maintain approximate ½-inch joint, as stone allows. Do not
used stacked vertical joints.
C. Joints:
1. Tool joints when “thumb-print’ hard with round pointer, slightly larger than width of joint.
2. Trowel point or concave exterior joints below grade.
3. Flush cut joints to be finished with soft brush only.
4. Re-tempering mortar is not permitted.
5. Use non-corrosive stone shims as required to maintain uniform joint thickness.
D. Stopping and Resuming Work: Stop work by stepping back units in each course from those in
course below; do not tooth. When resuming work, clean masonry surfaces that are to receive
mortar, remove loose masonry units and mortar.
E. Built-in Work: As construction progresses, build in items specified in this and other Sections. Fill
in solidly with masonry around built-in items.
F. Fill space between steel frames and masonry solidly with mortar unless otherwise indicated
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G. Install thin veneer stone and mortar in accordance with manufacturer’s instructions and ACI
530.1/ASCE 6/TMS 602.
1. Maintain masonry courses to uniform dimensions. Form vertical and horizontal joints of
uniform thickness.
2. Maintain approximately ½-inch joints, as stone allows. Do not use stacked vertical joints.
3.4 SETTING THIN VENEER CAST STONE IN MORTAR
A. Install thin veneer cast-stone units to comply with requirements in Section 04 20 00 "Unit
Masonry."
B. Set thin veneer cast stone as indicated on Drawings. Set units accurately in locations indicated,
with edges and faces aligned according to established relationships and indicated tolerances.
1. Install anchors, supports, fasteners, and other attachments indicated or necessary to
secure units in place.
2. Coordinate installation of thin veneer cast stone with installation of flashing specified in
other Sections.
C. Wet joint surfaces thoroughly before applying mortar or setting in mortar.
D. Set units in full bed of mortar with full head joints unless otherwise indicated.
1. Set units with joints 1/4 to 3/8 inch wide unless otherwise indicated.
2. Build anchors and ties into mortar joints as units are set.
3. Fill dowel holes and anchor slots with mortar.
4. Fill collar joints solid as units are set.
5. Build concealed flashing into mortar joints as units are set.
6. Keep head joints in copings and between other units with exposed horizontal surfaces
open to receive sealant.
7. Keep joints at shelf angles open to receive sealant.
E. Rake out joints for pointing with mortar to depths of not less than 3/4 inch. Rake joints to
uniform depths with square bottoms and clean sides. Scrub faces of units to remove excess
mortar as joints are raked.
F. Point mortar joints by placing and compacting mortar in layers not greater than 3/8 inch.
Compact each layer thoroughly and allow it to become thumbprint hard before applying next
layer.
G. Tool exposed joints slightly concave when thumbprint hard. Use a smooth plastic jointer larger
than joint thickness.
H. Rake out joints for pointing with sealant to depths of not less than 3/4 inch. Scrub faces of units
to remove excess mortar as joints are raked.
I. Point joints with sealant to comply with applicable requirements in Section 07 92 00 "Joint
Sealants."
1. Prime thin veneer cast-stone surfaces to receive sealant and install compressible backer
rod in joints before applying sealant unless otherwise indicated.
J. Provide sealant joints at head joints of copings and other horizontal surfaces; at expansion,
control, and pressure-relieving joints; and at locations indicated.
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1. Keep joints free of mortar and other rigid materials.
2. Build in compressible foam-plastic joint fillers where indicated.
3. Form joint of width indicated, but not less than 3/8 inch.
4. Prime thin veneer cast-stone surfaces to receive sealant and install compressible backer
rod in joints before applying sealant unless otherwise indicated.
5. Prepare and apply sealant of type and at locations indicated to comply with applicable
requirements in Section 07 92 00 "Joint Sealants."
3.5 SETTING ANCHORED THIN VENEER CAST STONE WITH SEALANT-FILLED JOINTS
A. Set thin veneer cast stone as indicated on Drawings. Set units accurately in locations indicated,
with edges and faces aligned according to established relationships and indicated tolerances.
1. Install anchors, supports, fasteners, and other attachments indicated or necessary to
secure units in place.
2. Shim and adjust anchors, supports, and accessories to set thin veneer cast stone in
locations indicated with uniform joints.
B. Keep cavities open where unfilled space is indicated between back of thin veneer cast-stone
units and backup wall; do not fill cavities with mortar or grout.
C. Fill anchor holes with sealant.
1. Where dowel holes occur at pressure-relieving joints, provide compressible material at
ends of dowels.
D. Set thin veneer cast stone supported on clip or continuous angles on resilient setting shims.
Use material of thickness required to maintain uniform joint widths. Hold shims back from face
of cast stone a distance at least equal to width of joint.
E. Keep joints free of mortar and other rigid materials. Remove temporary shims and spacers from
joints after anchors and supports are secured in place and cast-stone units are anchored. Do
not begin sealant installation until temporary shims and spacers are removed.
1. Form open joint of width indicated, but not less than 3/8 inch.
F. Prime thin veneer cast-stone surfaces to receive sealant and install compressible backer rod in
joints before applying sealant unless otherwise indicated.
G. Prepare and apply sealant of type and at locations indicated to comply with applicable
requirements in Section 07 92 00 "Joint Sealants."
3.6 INSTALLATION TOLERANCES
A. Variation from Plumb: Do not exceed 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2-inch
maximum.
B. Variation from Level: Do not exceed 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2-inch
maximum.
C. Variation in Joint Width: Do not vary joint thickness more than 1/8 inch in 36 inches or one-
fourth of nominal joint width, whichever is less.
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D. Variation in Plane between Adjacent Surfaces (Lipping): Do not vary from flush alignment with
adjacent units or adjacent surfaces indicated to be flush with units by more than 1/16 inch,
except where variation is due to warpage of units within tolerances specified.
3.7 FLASHING
A. General: Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges,
other obstructions to downward flow of water in wall, and where indicated.
B. Install flashing as follows unless otherwise indicated:
1. Prepare masonry surfaces so they are smooth and free from projections that could
puncture flashing. Where flashing is within mortar joint, place through-wall flashing on
sloping bed of mortar and cover with mortar. Before covering with mortar, seal
penetrations in flashing with adhesive, sealant, or tape as recommended by flashing
manufacturer.
2. At lintels and shelf angles, extend flashing a minimum of 6 inches into masonry at each
end. At heads and sills, extend flashing 6 inches at ends and turn up not less than 2
inches to form end dams.
3. Install metal drip edges beneath flexible flashing at exterior face of wall. Stop flexible
flashing 1/2 inch back from outside face of wall and adhere flexible flashing to top of
metal drip edge.
4. Install metal flashing termination beneath flexible flashing at exterior face of wall. Stop
flexible flashing 1/2 inch back from outside face of wall and adhere flexible flashing to top
of metal flashing termination.
5. Cut flexible flashing off flush with face of wall after masonry wall construction is
completed.
C. Install reglets and nailers for flashing and other related construction where they are shown to be
built into masonry.
3.8 FIELD QUALITY CONTROL
A. Testing and Inspecting: Owner will engage special inspectors to perform tests and inspections
and prepare reports. Allow inspectors access to scaffolding and work areas as needed to
perform tests and inspections. Retesting of materials that fail to comply with specified
requirements shall be done at Contractor's expense.
3.9 REPAIRING, POINTING, AND CLEANING
A. Remove and replace masonry units that are loose, chipped, broken, stained, or otherwise
damaged or that do not match adjoining units. Install new units to match adjoining units; install
in fresh mortar, pointed to eliminate evidence of replacement.
B. Pointing: During the tooling of joints, enlarge voids and holes, except weep holes, and
completely fill with mortar. Point up joints, including corners, openings, and adjacent
construction, to provide a neat, uniform appearance. Prepare joints for sealant application,
where indicated.
C. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove
mortar fins and smears before tooling joints.
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D. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows:
1. Remove large mortar particles by hand with wooden paddles and non-metallic scrape
hoes or chisels.
2. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for
comparison purposes. Obtain Architect's approval of sample cleaning before proceeding
with cleaning of masonry.
3. Protect adjacent stone and non-masonry surfaces from contact with cleaner by covering
them with liquid strippable masking agent or polyethylene film and waterproof masking
tape.
4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by
rinsing surfaces thoroughly with clear water.
5. Clean brick by bucket-and-brush hand-cleaning method described in BIA Technical
Notes 20.
6. Clean non-stone, non-brick masonry with a proprietary non-acidic cleaner applied
according to manufacturer's written instructions.
7. Clean stone trim to comply with stone supplier's written instructions.
8. Clean limestone units to comply with recommendations in ILI's "Indiana Limestone
Handbook."
3.10 MASONRY WASTE DISPOSAL
A. Salvageable Materials: Unless otherwise indicated, excess masonry materials are Contractor's
property. At completion of unit masonry work, remove from Project site.
B. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess or soil-
contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill
material as fill is placed.
1. Crush masonry waste to less than 4 inches in each dimension.
2. Mix masonry waste with at least two parts of specified fill material for each part of
masonry waste. Fill material is specified in Section 31 20 00 "Earth Moving."
3. Do not dispose of masonry waste as fill within 18 inches of finished grade.
C. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as
described above or recycled, and other masonry waste, and legally dispose of off Owner's
property.
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