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SECTION 04852
 
         
THIN VENEER STONE ASSEMBLIES
 
         
Copyright 2011 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Architectural Stone Company; thin stone veneer for residential and commercial projects.
.
This section is based on the products of Architectural Stone Company, which is located at:
          5601 Democracy Dr.
Suite 110
Plano, TX 75024
Phone: 972-473-9988
Fax: 972-473-8688
Web Site: www.architecturalstone.net
E-mail: josh@architecturalstone.net
          Architectural Stone Company supplies and installs cut, hand-carved and builder's stone for residential and commercial projects large and small, nationwide. All of our products and installation services are customized for your specific project requirements. We can produce virtually any type of architectural element, such as columns, balustrades, fountains, range hoods, mantels, entablature, pediments, and door and window surrounds as well as hardscape/landscape materials. In addition, we import carefully chosen architectural antiquities, including antique firebrick and fireplace mantels.

We supply most types of natural stone including slate, sandstone, limestone, marble, travertine, granite and mosaics. Depending on the stone material, we can produce thin veneer, boulders, chopped stone, building stone, slabs, and retaining wall material, to name a few.

Architectural Stone Company has built a reputation for providing superior stone materials and installation services for architects and general contractors and also consults with architects and engineers to ensure proper application of all of our materials.
 
          PART 1GENERAL
          ** NOTE TO SPECIFIER ** This section includes thin cut veneer masonry construction for interior and exterior walls of natural stone Select the paragraphs below that describe the system(s) required and delete any sections that are not relevant to this project.
 
          1.1SECTION INCLUDES
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
          A.Section includes thin cut veneer masonry construction of natural stone set in cement mortar over a structural wall backing of:
          1.Plywood sheathing.
          2.Concrete masonry.
          3.Metal building.
          4.Other ________.
 
          B.Section includes special decorative veneer cut stone shapes for trim.
 
          C.Section includes installation of built-in accessories.
 
          1.2RELATED SECTIONS
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
          A.Section 03300 - Cast-In-Place Concrete: Concrete Foundations.
 
          B.Section 04810 - Unit Masonry Assemblies: Masonry supporting wall.
 
          C.Section 05500 - Metal Fabrications: Shelf angles, structural supports, anchors and other built-in components for building into stone veneer masonry by this section.
 
          D.Section 05400 - Cold-Formed Metal Framing: Formed steel framed supporting wall.
 
          E.Section 06112 - Framing and Sheathing: Wood frame supporting wall.
 
          F.Section 07620 - Sheet Metal Flashing and Trim.
 
          G.Section 07900 - Joint Sealers: Sealant for perimeter and control joints.
 
          H.Section 09220 - Cement Plaster: Metal lath and scratch coat back-up over supporting walls.
 
          I.Section 13121 - Pre-Engineered Metal Buildings.
 
          1.3REFERENCES
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section; add others as required.
 
          A.ASTM C 91 - Standard Specification for Masonry Cement.
 
          B.ASTM C 97 - Standard Specification for Absorption and Bulk Specific Gravity of Dimension Stone.
 
          C.ASTM C 144 - Aggregate for Masonry Mortar.
 
          D.ASTM C 150 - Standard Specification for Portland Cement.
 
          E.ASTM C 170 - Standard Specification for Compressive Strength of Dimension Stone.
 
          F.C 207 - Standard Specification for Hydrated Lime for Masonry Purposes.
 
          G.ASTM C 270 - Mortar for Unit Masonry.
 
          H.ASTM C 568 - Standard Specification for Limestone Dimension Stone.
 
          I.ASTM C 616 - Standard Specification for Quartz Based Dimension Stone.
 
          J.ASTM C 780 - Preconstruction Evaluation of Mortar for Plain & Reinforced Masonry.
 
          K.ASTM C 847 - Standard Specification for Metal Lath.
 
          L.ASTM C 880 - Standard Specification for Flexural Strength of Dimension Stone.
 
          M.ASTM C 1063 - Standard Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster.
 
          N.ASTM D 226 - Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.
 
          O.ACI 530/ASCE 5/TMS 402 - Building Code Requirements for Masonry Structures.
 
          P.ACI 530.1/ASCE 6/TMS 602 - Specifications for Masonry Structures.
 
          Q.PCA - Portland Cement Plaster (Stucco) Manual
 
          1.4SUBMITTALS
 
          A.Submit under provisions of Section 01300.
 
          B.[ Product Data ]: Quarrier or natural stone data sheets on stone and mortar mix to be used, including:
          1.Preparation instructions and recommendations.
          2.Storage and handling requirements and recommendations.
          3.Installation methods.
          4.Cleaning methods.
 
          C.Design Data: Submit design mix when Property specification of ASTM C270 is to be used, with required environmental conditions, and admixture limitations.
          ** NOTE TO SPECIFIER ** Delete selection samples if color and texture has already been selected.
 
          D.Selection Samples: For each stone product specified, submit two samples, minimum size 48 inches (1216 mm) square, representing actual product, color, and texture.
 
          E.Samples: Submit samples of mortar representing actual mortar color and color range.
 
          F.Quarrier's Certificate: Certify stone properties and mortar mix will conform to specified requirements.
          ** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
 
          G.Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
          1.Size:
          a.4 feet by 4 feet (1.2 m by 1.2 m).
          b.8 feet by 8 feet (2.4 m by 2.4 m).
          2.Include all stone unit types and sizes to be used including a typical corner condition, special shapes and mortar joint treatment. Clean the sample panel using the same materials and tools as planned for the final stone masonry construction.
          3.Do not proceed with remaining work until workmanship and color is approved by Architect.
          4.Do not remove sample panel until construction activities of this section have been accepted by the Architect.
 
          1.5QUALIFICATIONS
 
          A.Stone Quarrier: Company specializing in manufacturing products specified in this section with minimum five years documented experience.
 
          B.Stone Masonry Company: Company specializing in performing Work of this section with minimum five years documented experience.
 
          1.6QUALITY ASSURANCE
 
          A.Preconstruction Meetings: Conduct preconstruction meetings including the Architect, Contractor, stone masonry subcontractor, and the flashing subcontractor to verify project requirements, substrate conditions, manufacturer's installation instructions and other requirements. Comply with Division 1 requirements.
 
          1.7DELIVERY, STORAGE, AND HANDLING
 
          A.Store products on pallets, under cover and in manufacturer's unopened packaging until ready for installation.
 
          B.Store stone materials on pallets on a dry level surface. Pallets shall not be stacked and shall be covered with tarps.
 
          C.Store mortar under cover and in an area where temperature is maintained between 4 degrees C (40 degrees F) to 43 degrees C (110 degrees F).
 
          1.8PROJECT CONDITIONS
 
          A.Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
 
          B.Hot and Cold Weather Requirements: In accordance with ACI 530.1/ASCE 6/TMS 602 Specifications for Masonry Structures.
 
          C.Ambient temperature shall be 40 degrees F or above during erection of stone masonry. When ambient temperature falls below 50 degrees F, mortar mixing water shall be heated.
 
          PART 2PRODUCTS
 
          2.1MANUFACTURERS
 
          A.Acceptable Manufacturer: Architectural Stone Company, which is located at: 5601 Democracy Dr. Suite 110 ; Plano, TX 75024; Tel: 972-473-9988; Fax: 972-473-8688; Email: josh@architecturalstone.net; Web: www.architecturalstone.net
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
          B.Substitutions: Not permitted.
 
          C.Requests for substitutions will be considered in accordance with provisions of Section 01600.
          ** NOTE TO SPECIFIER ** Select product color and pattern from Architectural Stone catalog or by direct visual inspection of samples. Special heights and lengths are available by special order. Delete paragraphs below that are not required. If more than one product is used identify the locations of each product on the Drawings. If special shapes are required, clearly indicate the locations and sizes on the drawings.
 
          2.2THIN VENEER STONE
 
          A.Texas Buff Limestone:
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,410 psi.
          b.Absorption ASTM C 97: 4.0 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          3.Face:
          a.Machine sawn face exposed.
          b.Machine slip face.
          4.Standard Dimension:
          a.Course Height: Sawn bed, 12 inches.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Buff.
 
          B.Charcoal Limestone
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,410 psi.
          b.Absorption ASTM C 97: 4.0 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          3.Face:
          a.Machine sawn face exposed.
          4.Standard Dimension:
          a.Course Height: Sawn bed, 12 inches.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Gray, Buff.
 
          C.Texas muti-color splitface
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,800 psi (47.2 MPa).
          b.Absorption ASTM C 97: 4.8 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          e.Modulus of Rupture ASTM C 99: 1,183 psi (8.2 MPa).
          3.Face:
          a.Machine split with split-face exposed.
          b.Machine sawn face.
          4.Standard Dimension:
          a.Course heights: Sawn bed, 5 inch 7.75 inch, 10.5 inch.
          b.Additional course heights available.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Charcoal, Buff, Taupe.
 
          D.Mocha splitface random lengths
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,560 psi (45.3 MPa).
          b.Absorption ASTM C 97: 6.13 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          e.Modulus of Rupture ASTM C 99: 824 psi (5.67 MPa).
          3.Face:
          a.chine split with split-face exposed.
          b.Machine sawn face.
          4.Standard Dimension:
          a.Course heights: Sawn bed, 5 inch 7.75 inch, 10.5 inch.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Mocha, Buff.
 
          E.Texas Roughback
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,410 psi.
          b.Absorption ASTM C 97: 4.0 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          3.Face:
          a.Natural cleft with bedface exposed.
          b.Natural.
          4.Standard Dimension:
          a.Course Height: Sawn bed, 12 inch.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Gold, White. Buff, Rust Tones.
 
          F.Roughback with Quoin Corners
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,410 psi.
          b.Absorption ASTM C 97: 4.0 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          3.Face:
          a.Natural cleft with bedface exposed. Quoin corners machine sawn smooth.
          b.Natural.
          4.Standard Dimension:
          a.Course Height: Sawn bed, 12 inch.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Gold, White. Buff, Rust Tones.
 
          G.Texas buff splitface random lengths
          1.Region: Texas. Schkade Quarry.
          2.Limestone conforming to ASTM C 568 with the following properties:
          a.Compressive Strength, ASTM C 170: 6,410 psi.
          b.Absorption ASTM C 97: 4.0 percent.
          c.Flexural Strength: ASTM C 880: 1,080.
          d.Freeze/Thaw Loss ASTM C 97: 0.09 percent.
          3.Face:
          a.Machine split with split-face exposed.
          4.Standard Dimension:
          a.Course Heights: Sawn bed, 5, 7.75 and 10.5 inches.
          b.Additional course heights upon request.
          c.Nominal depth of 1 inch (25 mm) plus or minus 1/4 inch (6 mm).
          5.Color Range: Buff Tones.
 
          2.3SPECIAL SHAPES
          ** NOTE TO SPECIFIER ** List the special shapes required and delete those not required. Clearly indicate the location and sizes on the Drawings.
 
          A.Provide special shapes as indicated on the Drawings and as follows:
          1.Quoins.
          2.Keystones.
          3.Edgestones.
          4.Cornerstones.
          5.Sills.
          6.Ledges.
          7.Medallions
          8.Other _____.
 
          B.Stone shall be furnished in sizes indicated plus or minus 1/2 inch. Material shall conform to ASTM C 568 with the following properties:
          1.Maximum absorption rate of 3 percent when tested in accordance with ASTM C97.
          2.Minimum density of 2560 kg/m3 when tested in accordance with ASTM C97.
          3.Minimum compressive strength of 55 MPa when tested in accordance with ASTM C170.
          4.Minimum flexural strength of 8.27 MPa when tested in accordance with ASTM C880.
          ** NOTE TO SPECIFIER ** Identify the color required for special shapes and delete one of the following two paragraphs.
 
          C.Color shall be:
          1.Match the veneer stone.
          2._______________.
 
          2.4ACCESSORIES
          ** NOTE TO SPECIFIER ** Edit the following three paragraphs to suit the project requirements. Delete if not required. Use paragraph A when thin masonry veneer is installed over metal siding back-up; Use paragraph B for use over wood sheathing or existing concrete or masonry back-up.
 
          A.Expanded Metal Lath Paper Backed: ASTM C847; galvanized, self furring mesh of weight to suit application; backed with paper.
 
          B.Expanded Metal Lath: ASTM C847, galvanized, self-furring.
 
          C.Lath Anchorage: Tie wire, nails, screws and other metal supports, galvanized, of type and size to suit application and to rigidly secure materials in place.
          ** NOTE TO SPECIFIER ** Edit the following two paragraphs to suit the project requirements. Delete if not required. Use paragraph D with wood sheathing. Use paragraph E with concrete or masonry without lath.
 
          D.Building Paper: ASTM D 226, No. 30 asphalt saturated felt.
 
          E.Concrete Bonding Agent: Latex type as approved by the stone quarrier.
 
          F.Setting Buttons and Shims: Lead or Plastic.
 
          2.5MORTAR
          ** NOTE TO SPECIFIER ** Paragraph A is Masonry Cement paragraphs B, C, and D is for proportioned masonry materials. Delete one or leave both giving the Contractor the option to select one based on his needs.
 
          A.Masonry Cement: Complying with ASTM C91:
          1.Type S.
          ** NOTE TO SPECIFIER ** Select one Color as appropriate. For special color additives, select from natural pigments for maximum color stability. Delete those paragraphs not required.
          2.Color, gray is recommend
          3.Color, white is optional
          4.Color _______.
          ** NOTE TO SPECIFIER ** Select one Lime/Portland Cement Type as appropriate. Delete the paragraph not required.
 
          B.Portland Cement: Complying with ASTM C150:
          1.Type I.
          2.Type __.
          ** NOTE TO SPECIFIER ** Select one Color as appropriate. For special color additives, select from natural pigments for maximum color stability. Delete those paragraphs not required.
          3.Color, gray is recommended
          4.Color, white is optional
          5.Color _______.
 
          C.Mortar Aggregate: Complying with ASTM C144, standard masonry type.
          ** NOTE TO SPECIFIER ** Select one lime Type as appropriate. Delete those not required.
 
          D.Hydrated Lime: Complying with ASTM C207:
          1.Type S.
          2.Type SA.
 
          E.Water: Clean and potable.
 
          2.6MIXES
 
          A.Mortar Mixes:
          1.Mortar for Structural Masonry: Complying with ASTM C270, using Proportion Specification.
          a.Type S.
 
          B.Mortar Mixing:
          1.Mix mortar ingredients in accordance with ASTM C270. Mix only in quantities needed for immediate use.
          2.Do not use anti-freeze compounds to lower freezing point of mortar.
 
          PART 3EXECUTION
          ** NOTE TO SPECIFIER ** Verify crack control design is correctly indicated and detailed on Drawings in accordance with National Concrete Masonry Association; TEK 10-1A for Crack Control Design, TEK 10-2B for control joint design and locations, TEK 19-4A for Flashing Strategies for Concrete Masonry Walls, and TEK 19-5A for Flashing Details for Concrete Masonry Walls
 
          3.1EXAMINATION
 
          A.Do not begin installation until backing structure is plumb, bearing surfaces are level and substrates are clean and properly prepared.
 
          B.Verify that built-in items are in proper location, and ready for roughing into stone masonry.
 
          C.Notify Architect of unsatisfactory preparation before proceeding.
          ** NOTE TO SPECIFIER ** Edit paragraphs 3.2, 3.3, 3.4 and 3.5 to suit project requirements. Delete paragraphs not required.
 
          3.2PREPARATION FOR INSTALLATION OVER PLYWOOD SHEATHING
 
          A.Cover sheathing with waterproof building paper with all joints lapped shingle style a minimum of 4 inches (102 mm).
 
          B.Install metal lath in accordance with ASTM C1063. Apply metal lath taut, with long dimension perpendicular to supports. Lap ends minimum 1 inch (25 mm) Secure end laps with tie wire where they occur between supports.
 
          C.Attach metal lath to wood supports using galvanized nails at maximum 6 inches (152 mm) on center vertically and 16 inches (406 mm) on center horizontally. Fasten with a minimum of a 1 inch (25 mm) penetration of the wood studs. Stop lath 1 inch (25 mm) from finished edges.
 
          D.Continuously reinforce internal angles with corner mesh.
 
          E.Place lath vertically above each top corner and each side of door and glazed frames.
 
          3.3PREPARATION FOR INSTALLATION OVER CONCRETE OR CONCRETE MASONRY
          ** NOTE TO SPECIFIER ** Edit to suit project conditions. Use paragraph A and B for use with mortar directly over clean concrete or concrete masonry. Use paragraph B over clean or new concrete and concrete masonry. Delete if not required.
 
          A.Clean or sandblast concrete masonry to assure a proper mortar bond. Verify no bituminous, water repellent, or form release agents exist on concrete surface that are detrimental to mortar bond.
 
          B.Apply bonding agent in accordance with the manufacturers printed instructions.
          ** NOTE TO SPECIFIER ** Edit to suit project conditions. Use the following paragraphs for use with mortar applied to metal lath fastened to concrete or concrete masonry. Delete if not required.
 
          C.Install metal lath in accordance with ASTM C1063. Apply metal lath taut, with long dimension perpendicular to supports. Lap ends minimum 1 inch (25 mm) Secure end laps with tie wire where they occur between supports.
 
          D.Attach metal lath to concrete using galvanized concrete nails at maximum 6 inches (152 mm) on center vertically and 16 inches on center horizontally. Stop lath 1 inch (25 mm) from finished edges.
 
          E.Continuously reinforce internal angles with corner mesh.
 
          F.Place lath vertically above each top corner and each side of door and glazed frames.
 
          3.4PREPARATION FOR INSTALLATION OVER METAL SIDING
 
          A.Install paperbacked metal lath in accordance with ASTM C1063. Apply metal lath taut, with long dimension perpendicular to supports. Lap ends minimum 1 inch (25 mm) Secure end laps with tie wire where they occur between supports.
 
          B.Attach metal lath to metal siding support members using galvanized 1-1/4 inch (32 mm) type S-12 Panhead Super Tight Screws as manufactured by United States Gypsum. Screws shall penetrate a minimum of 3/8 inch (0.9525 cm) into the metal siding support members. Provide 1 fastener per SF of surface area and do not exceed 6 inches (152 mm) on center in any one direction.
 
          C.Place minimum 4inch (100 mm) wide strips of metal lath centered over junctions of dissimilar backing materials. Secure rigidly in place.
 
          D.Place lath vertically above each top corner and each side of door and glazed frames.
 
          E.Apply scratch coat in accordance with PCA Plaster (Stucco) Manual.
 
          F.Apply scratch coat to nominal thickness of 1/2 to 3/4 inch (12.5 to 19 mm) over metal lath surfaces.
 
          G.Moist cure scratch coat for minimum period of 48 hours.
 
          H.After curing, dampen previous coat prior to applying mortar and thin stone veneer.
 
          3.5PREPARATION FOR INSTALLATION OF THIN VENEER STONE
 
          A.Stone must be water saturated, surface-dry when placed. Water down the stone 24 hours prior to placement until saturated. Reapply water to keep stone saturated as required by weather conditions.
 
          B.Coordinate placement of reinforcement, anchors and accessories, flashings and weep holes and other moisture control products supplied by other sections.
 
          C.Clean all built-in items of loose rust, ice, mud, or other foreign matter before incorporating into the wall. All ferrous metal built into the wall shall be primed or galvanized.
 
          D.If required, provide temporary bracing during installation of masonry work. Maintain bracing in place until building structure provides permanent support.
 
          3.6INSTALLATION OF THIN VENEER STONE
 
          A.Install thin veneer stone and mortar in accordance with ACI 530.1/ASCE 6/TMS 602 Specifications for Masonry Structures.
 
          B.Maintain masonry courses to uniform dimension(s). Form vertical and horizontal joints of uniform thickness.
 
          C.Pattern Bond:
          1.Lay stone with the bedface, splitface or weather edge exposed, as described in stone veneer section 2.2. Take care to avoid a concentration of any one color to any one wall surface.
          2.Maintain an approximate 1/2 inch (12.5 mm) joint, as stone allows.
          3.Do not use stacked vertical joints.
          4.Lay out work in advance and distribute color range of stone uniformly over total work area.
 
          D.Placing and Bonding:
          1.Dampen substrate as required to reduce excessive suction.
          2.Apply mortar in accordance with PCA Plaster (Stucco) Manual to a thickness of 1/2 to 3/4 inch. Do not spread more than a workable area of 5 to 10 SF so that mortar will not set before stone is applied.
          3.Lay thin veneer stone in a full bed of mortar with full head joints.
          4.Work from the bottom up laying corner pieces first.
          5.Remove excessive mortar as work progresses.
          6.Do not shift or tap veneer stone after mortar has achieved initial set. Where adjustment is required, remove mortar and replace.
          7.Isolate top of veneer stone from horizontal structural framing members and slabs or decks with compressible joint filler and sealant in accordance with Section 07900.
 
          E.Joining Work: Where fresh masonry joints partially set masonry.
          1.Remove loose stone and mortar.
          2.Clean and lightly wet surface of set masonry.
          3.To avoid a horizontal run of masonry rack back 1/2 (12.5 mm) the length of stone in each course.
          4.Toothing is not permitted.
 
          F.Joints:
          1.Lay stone with an approximate 1/2 inch (12.5 mm) mortar joint, as stone allows.
          2.Tool joints when "thumb-print" hard with a round jointer slightly larger than the width of the joint.
          3.Trowel-point or concave tool exterior joints below grade.
          4.Flush cut joints to be finished with a soft brush only.
          5.Retempering or mortar is not permitted.
          6.Use non-corrosive stone shims as required to maintain uniform joint thickness.
          ** NOTE TO SPECIFIER ** Flashings, weeps and wall penetrations require special attention on drawing details. Located and detail properly.
 
          G.Flashing:
          1.Clean surface of masonry smooth and remove any projections, which could damage flashings.
          2.Place flashing on a bed of mortar.
          3.Cover flashing with mortar.
          ** NOTE TO SPECIFIER ** Verify control and expansion joints are correctly indicated and detailed on Drawings. Control joints shall be designed in accordance with National Concrete masonry Association TEK 10-2B for control joint design and locations.
 
          H.Control and Expansion Joints: Keep joints open and free of debris. Coordinate control joint in accordance with Section 07900 for sealant performance.
 
          I.Sealant Recesses: Provide open joint 3/4 inch deep and 1/4 inch wide, where masonry meets doors, windows and other exterior openings. Coordinate sealant joints in accordance with Section 07900 for sealant performance.
 
          J.Cutting And Fitting: Cut and fit for chases, pipes, conduit, sleeves, grounds, and other penetrations and adjacent materials. Coordinate with other sections of work to provide correct size, shape, and location.
 
          3.7FIELD QUALITY CONTROL
          ** NOTE TO SPECIFIER ** Include for testing of mortar and grout when assurance of mix quality is critical to the project.
 
          A.Test mortar and grout in accordance with Section 01110.
 
          B.Testing of Mortar Mix: In accordance with ASTM C780, Annex A4, for mortar aggregate ratio and ASTM C 780, Annex A5, for mortar water content.
 
          3.8PROTECTION
 
          A.Protect installed products until completion of project.
 
          B.Cover the top of unfinished stone masonry work to protect it from the weather.
 
          C.Touch-up, repair or replace damaged products before Substantial Completion.
 
          3.9CLEANING
 
          A.Keep the face of stone free of mortar as the work progresses. If residual mortar is on the face of the stone, allow to dry partially and brush the mortar off the surface and sponge off the residue.
 
          B.When the work is completed and the mortar has set for 2 to 3 days the surface may be cleaned from top to bottom using a mild masonry detergent acceptable to the stone manufacturer. Do not use metal brushes or acids for cleaning.
 
         
END OF SECTION