ATTACHMENT 3 - Specifications_VOLUME 2_01.pdf

TEMPLE VA MEDICAL CENTER

TEMPLE, TX 76504

PROJECT NO. 674-251-7971

REPLACE BOILERS AND BOILER PLANT

SPECIFICATIONS

COX DESIGN ASSOCIATES

DECEMBER 2022

VOLUME TWO

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REPLACE BOILERS AND BOILER PLANT

PROJECT #674-251-7971

TEMPLE VA HEALTH CARE SYSTEM 04-01-22

00 01 10-1

DEPARTMENT OF VETERANS AFFAIRS

VHA MASTER SPECIFICATIONS

TABLE OF CONTENTS

Section 00 01 10

DIVISION 00 - SPECIAL SECTIONS DATE

00 01 15 List of Drawing Sheets 05-20

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00 General Requirements 11-21 01 32 16.15 Project Schedules 11-21 01 33 23 Shop Drawings, Product Data, and Samples 06-21 01 35 26 Safety Requirements 11-21 01 42 19 Reference Standards 11-20 01 45 29 Testing Laboratory Services 03-22 01 74 19 Construction Waste Management 04-22 01 91 00 General Commissioning Requirements 04-22

DIVISION 02 – EXISTING CONDITIONS

02 41 00 Demolition 11-21

DIVISION 03 – CONCRETE

03 30 00 Cast-in-Place Concrete 01-21

DIVISION 04 – MASONRY

04 05 13 Masonry Mortaring 10-17 04 05 16 Masonry Grouting 01-21 04 20 00 Unit Masonry 08-17

DIVISION 05 – METALS

05 12 00 Structural Steel Framing 11-18 05 31 00 Steel Decking 01-21 05 51 00 Metal Stairs 01-21

DIVISION 06 – WOOD, PLASTICS, AND COMPOSITES

06 10 00 Rough Carpentry 10-17 06 20 00 Finish Carpentry 01-21

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

00 01 10-2

07 21 13 Thermal Insulation 01-21 07 22 00 Roof and Deck Insulation 01-21 07 24 00 Exterior Insulation and Finish Systems 01-21 07 27 27 Fluid-Applied Membrane Air Barrier, Vapor Retarding 01-21 07 54 23 Thermoplastic Polyolefin (TPO) Roofing 01-21 07 60 00 Flashing and Sheet Metal 01-21 07 71 00 Roof Specialties 01-21 07 72 00 Roof Accessories 01-21 07 81 00 Applied Fireproofing 10-17 07 84 00 Firestopping 01-21 07 92 00 Joint Sealants 04-22 07 95 13 Expansion Joint Cover Assemblies 01-21

DIVISION 08 - OPENINGS

08 11 13 Hollow Metal Doors and Frames 01-21 08 14 00 Interior Wood Doors 01-21 08 17 10 Integrated Door Assemblies 01-21 08 33 00 Coiling Doors and Grilles 01-21 08 41 13 Aluminum-Framed Entrances and Storefronts 01-21 08 51 13 Aluminum Windows 01-21 08 71 00 Door Hardware 01-21 08 56 53 Blast Resistant Windows 01-21 08 71 13 Automatic Door Operators 01-21 08 71 13.11 Low Energy Power Assist Door Operators 01-21 08 80 00 Glazing 01-21 08 90 00 Louvers and Vents 01-21

DIVISION 09 – FINISHES

09 22 16 Non-Structural Metal Framing 06-18 09 29 00 Gypsum Board 04-20 09 30 13 Ceramic/Porcelain Tiling 01-21 09 51 00 Acoustical Ceilings 12-18 09 65 13 Resilient Base and Accessories 01-21 09 65 16 Resilient Sheet Flooring 05-18 09 91 00 Painting 01-21

DIVISION 10 – SPECIALTIES

10 14 00 Signage 01-21 10 21 13 Toilet Compartments 01-21 10 26 00 Wall and Door Protection 01-21 10 28 00 Toilet, Bath, and Laundry Accessories 01-21 10 44 13 Fire Extinguisher Cabinets 08-18 10 51 13 Metal Lockers 06-14

DIVISION 11 – EQUIPMENT – NOT USED

00 01 10-3

DIVISION 12 – FURNISHINGS

12 24 00 Window Shades 08-17 12 32 00 Manufactured Wood Casework 01-21 12 36 00 Countertops 12-18

DIVISION 13 - SPECIAL CONSTRUCTION – NOT USED

DIVISION 14– CONVEYING EQUIPMENT – NOT USED

DIVISION 21- FIRE SUPPRESSION

21 08 00 Commissioning of Fire Suppression Systems 11-16 21 13 13 Wet-Pipe Sprinkler Systems 06-15 21 13 16 Dry-Pipe Sprinkler Systems 01-15

DIVISION 22 – PLUMBING

22 05 11 Common Work Results for Plumbing 09-20 22 05 12 General Motor Requirements for Plumbing Equipment 09-20 22 05 19 Meters and Gages for Plumbing Piping 09-20 22 05 23 General-Duty Valves for Plumbing Piping 09-20 22 07 11 Plumbing Insulation 09-19 22 08 00 Commissioning of Plumbing Systems 11-16 22 11 00 Facility Water Distribution 05-21 22 11 23 Domestic Water Pumps 09-15 22 13 00 Facility Sanitary and Vent Piping 09-20 22 13 23 Sanitary Waste Interceptors 09-20 22 13 33 Packaged, Submersible Sewage Pump Units 09-20 22 14 00 Facility Storm Drainage 09-15 22 14 36 Packages, Submersible, Drainage Pump Units 09-15 22 15 00 General Service Compressed-Air Systems 09-20 22 31 11 Water Softeners 09-15 22 33 00 Electric Domestic Water Heater 09-20 22 40 00 Plumbing Fixtures 09-15

DIVISION 23 – HEATING, VENTILATING, AND AIR CONDITIONING

(HVAC)

23 05 10 Common Work Results for Boiler Plant and Steam Generation 04-20 23 05 11 Common Work Results for HVAC 02-20 23 05 12 General Motor Requirements for HVAC and Steam Generation Equipment 02-20 23 05 41 Noise and Vibration Control for HVAC Piping and Equipment 02-20 23 05 51 Noise and Vibration Control for Boiler Plant 04-20 23 05 93 Testing, Adjusting, and Balancing for HVAC 02-20

00 01 10-4

23 07 11 HVAC and Boiler Plant Insulation 02-20 23 08 00 Commissioning of HVAC Systems 02-20 23 08 11 Demonstrations and Tests for Boiler Plant 04-20 23 09 11 Instrumentation and Control for Boiler Plant 08-21 23 09 23 Direct-Digital Control System for HVAC 09-11 23 10 00 Facility Fuel Oil Systems 04-20 23 11 23 Facility Natural-Gas Piping 04-20 23 21 11 Boiler Plant Piping Systems 09-21 23 21 13 Hydronic Piping 02-20 23 21 23 Hydronic Pumps 02-20 23 22 13 Steam and Condensate Heating Piping 02-20 23 22 23 Steam Condensate Pumps 04-20 23 23 00 Refrigerant Piping 02-20 23 25 00 HVAC Water Treatment 02-20 23 31 00 HVAC Ducts and Casings 02-20 23 34 00 HVAC Fans 02-20 23 37 00 Air Outlets and Inlets 02-20 23 40 00 HVAC Air Cleaning Devices 03-20 23 50 11 Boiler Plant Mechanical Equipment 11-17 23 51 00 Breechings, Chimneys, and Stacks 04-20 23 52 33 Water Tube Boiler 03-22 23 73 00 Indoor Central-Station Air-Handling Units 03-20 23 81 00 Decentralized Unitary HVAC Equipment 03-20 23 81 43 Air Source Unitary Heat Pumps 03-20 23 82 00 Convection Heating And Cooling Units 03-20 23 82 16 Air Coils 03-20 25 10 10 Advanced Utility Metering System 02-10

DIVISION 25 – INTEGRATED AUTOMATION - NOT USED

DIVISION 26 – ELECTRICAL

26 05 11 Requirements for Electrical Installations 01-16 26 05 13 Medium-Voltage Cables 01-17 26 05 19 Low-Voltage Electrical Power Conductors and Cables 01-17 26 05 26 Grounding and Bonding for Electrical Systems 01-17 26 05 33 Raceway and Boxes for Electrical Systems 01-18 26 05 41 Underground Electrical Construction 01-17 26 05 73 Overcurrent Protective Device Coordination Study 01-18 26 08 00 Commissioning of Electrical Systems 11-16 26 09 23 Lighting Controls 01-18 26 11 16 Secondary Unit Substations 01-18 26 13 13 Medium-Voltage Circuit Breaker Switchgear 01-17 26 22 00 Low-Voltage Transformers 01-18 26 23 00 Low-Voltage Switchgear 01-17 26 23 13 Generator Paralleling Controls 01-17 26 24 13 Distribution Switchboards 01-18 26 24 16 Panelboards 01-18 26 27 26 Wiring Devices 01-18

00 01 10-5

26 29 11 Motor Controllers 01-18 26 29 21 Enclosed Switches and Circuit Breakers 01-17 26 32 13 Engine Generator 01-18 26 33 53 Static Uninterruptible Power Supply 01-17 26 36 23 Automatic Transfer Switches 01-17 26 41 00 Facility Lightning Protection 01-17 26 43 13 Surge Protective Devices 01-17 26 51 00 Interior Lighting 01-18

DIVISION 27 – COMMUNICATIONS

27 05 11 Requirements for Communications Installations 09-19 27 05 26 Grounding and Bonding for Communications Systems 06-15 27 05 33 Raceways and Boxes for Communications Systems 10-18 27 08 00 Commissioning of Communications Systems 11-16 27 10 00 Control, Communication and Signal Wiring 06-15 27 11 00 Telecommunications Room Fittings 06-15 27 15 00 Communications Structured Cabling 01-16 27 51 16 Public Address and Mass Notification System 10-18

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY

28 05 00 Common Work Results for Electronic Safety and Security 04-18 28 05 13 Conductors and Cables for Electronic Safety and Security 10-18 28 08 00 Commissioning of Electronic Safety and Security Systems 11-16 28 13 00 Physical Access Control System 10-11 28 13 53 Security Access Detection 09-11 28 16 00 Intrusion Detection System 10-11 28 23 00 Video Surveillance 09-11 28 31 00 Fire Detection and Alarm 10-11 33 63 00 Steam Energy Distribution 09-17

DIVISION 31 – EARTHWORK

31 20 00 Earthwork 11-21 31 23 23.33 Flowable Fill 10-12

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 05 23 Cement and Concrete for Exterior Improvements 11-21 32 12 16 Asphalt Paving 11-21 32 31 13 Chain Link Fences and Gates 05-18

DIVISION 33 – UTILITIES

33 08 00 Commissioning of Site Utility Systems 11-21 33 10 00 Water Utilities 11-21 33 30 00 Sanitary Sewer Utilities 11-21 33 40 00 Storm Sewer Utilities 11-21

00 01 10-6

33 51 00 Natural-Gas Distribution 10-11

DIVISION 34 – TRANSPORTATION - NOT USED

DIVISION 48 – Electrical Power Generation – NOT USED

APPENDIX A

Geotechnical Engineering Report

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REPLACE BOILERS AND BOILER PLANT

TEMPLE VA HEALTH CARE SYSTEM

SECTION 09 29 00

GYPSUM BOARD

PART 1 - GENERAL

1.1 DESCRIPTION

This section specifies installation and finishing of gypsum board.

1.2 RELATED WORK

A. Installation of steel framing members for walls, partitions, furring, soffits, and ceilings: Section 05 40 00, COLD-FORMED METAL FRAMING, and

Section 09 22 16, NON-STRUCTURAL METAL FRAMING.

B. Sound deadening board: Section 07 21 13, THERMAL INSULATION.

C. Acoustical Sealants: Section 07 92 00, JOINT SEALANTS.

D. Gypsum base for veneer plaster: Section 09 26 00, VENEER PLASTERING.

E. Lead lined wallboard: Section 13 49 00, RADIATION PROTECTION.

F. Lay in gypsum board ceiling panels: Section 09 51 00, ACOUSTICAL

CEILING.

1.3 TERMINOLOGY

A. Definitions and description of terms shall be in accordance with ASTM

C11, C840, and as specified.

B. Underside of Structure Overhead: In spaces where steel trusses or bar joists are shown, the underside of structure overhead shall be the underside of the floor or roof construction supported by the trusses or bar joists.

C. "Yoked": Gypsum board cut out for opening with no joint at the opening

(along door jamb or above the door).

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Cornerbead and edge trim.

2. Finishing materials.

3. Laminating adhesive.

4. Gypsum board, each type.

C. Shop Drawings:

1. Typical gypsum board installation, showing corner details, edge trim details and the like.

2. Typical sound rated assembly, showing treatment at perimeter of partitions and penetrations at gypsum board.

3. Typical shaft wall assembly.

4. Typical fire rated assembly and column fireproofing, indicating

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details of construction same as that used in fire rating test.

D. Samples:

1. Cornerbead.

2. Edge trim.

3. Control joints.

E. Test Results:

1. Fire rating test, each fire rating required for each assembly.

2. Sound rating test.

F. Certificates: Certify that gypsum board types, gypsum backing board types, cementitious backer units, and joint treating materials do not contain asbestos material.

1.5 DELIVERY, IDENTIFICATION, HANDLING AND STORAGE

In accordance with the requirements of ASTM C840.

1.6 ENVIRONMENTAL CONDITIONS

In accordance with the requirements of ASTM C840.

1.7 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society for Testing And Materials (ASTM):

C11-15..................Terminology Relating to Gypsum and Related

Building Materials and Systems

C475-15.................Joint Compound and Joint Tape for Finishing

Gypsum Board

C840-13.................Application and Finishing of Gypsum Board

C919-12.................Sealants in Acoustical Applications

C954-15.................Steel Drill Screws for the Application of

Gypsum Board or Metal Plaster Bases to Steel

Stud from 0.033 in. (0.84mm) to 0.112 in.

(2.84mm) in thickness

C1002-14................Steel Self-Piercing Tapping Screws for the

Application of Gypsum Panel Products or Metal

Plaster Bases to Wood Studs or Steel Studs

C1047-14................Accessories for Gypsum Wallboard and Gypsum

Veneer Base

C1177-13................Glass Mat Gypsum Substrate for Use as Sheathing

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C1658-13................Glass Mat Gypsum Panels

C1396-14................Gypsum Board

C. Underwriters Laboratories Inc. (UL):

Latest Edition..........Fire Resistance Directory

D. Inchcape Testing Services (ITS):

Latest Editions.........Certification Listings

PART 2 - PRODUCTS

2.1 GYPSUM BOARD

A. Gypsum Board: ASTM C1396, Type X, 16 mm (5/8 inch) thick unless shown otherwise.

B. Coreboard or Shaft Wall Liner Panels.

1. ASTM C1396, Type X.

2. ASTM C1658: Glass Mat Gypsum Panels,

3. Coreboard for shaft walls 300, 400, 600 mm (12, 16, or 24 inches) wide by required lengths 25 mm (one inch) thick with paper faces treated to resist moisture.

C. Water Resistant Gypsum Backing Board: ASTM C620, Type X, 16 mm (5/8 inch) thick.

D. Paper facings shall contain 100 percent post-consumer recycled paper content.

2.2 GYPSUM SHEATHING BOARD

A. ASTM C1396, Type X, water-resistant core, 16 mm (5/8 inch) thick.

B. ASTM C1177, Type X.

2.3 ACCESSORIES

A. ASTM C1047, except form of 0.39 mm (0.015 inch) thick zinc coated steel sheet or rigid PVC plastic.

B. Flanges not less than 22 mm (7/8 inch) wide with punchouts or deformations as required to provide compound bond.

2.4 FASTENERS

A. ASTM C1002 and ASTM C840, except as otherwise specified.

B. ASTM C954, for steel studs thicker than 0.04 mm (0.33 inch).

C. Select screws of size and type recommended by the manufacturer of the material being fastened.

D. For fire rated construction, type and size same as used in fire rating test.

E. Clips: Zinc-coated (galvanized) steel; gypsum board manufacturer's standard items.

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2.5 FINISHING MATERIALS AND LAMINATING ADHESIVE

ASTM C475 and ASTM C840. Free of antifreeze, vinyl adhesives, preservatives, biocides and other VOC. Adhesive shall contain a maximum

VOC content of 50 g/l.

PART 3 - EXECUTION

3.1 GYPSUM BOARD HEIGHTS

A. Extend all layers of gypsum board from floor to underside of structure overhead on following partitions and furring:

1. Two sides of partitions:

a. Fire rated partitions.

b. Smoke partitions.

c. Sound rated partitions.

d. Full height partitions shown (FHP).

e. Corridor partitions.

2. One side of partitions or furring:

a. Inside of exterior wall furring or stud construction.

b. Room side of room without suspended ceilings.

c. Furring for pipes and duct shafts, except where fire rated shaft wall construction is shown.

3. Extend all layers of gypsum board construction used for fireproofing of columns from floor to underside of structure overhead, unless shown otherwise.

B. In locations other than those specified, extend gypsum board from floor to heights as follows:

1. Not less than 100 mm (4 inches) above suspended acoustical ceilings.

2. At ceiling of suspended gypsum board ceilings.

3. At existing ceilings.

3.2 INSTALLING GYPSUM BOARD

A. Coordinate installation of gypsum board with other trades and related work.

B. Install gypsum board in accordance with ASTM C840, except as otherwise specified.

C. Moisture and Mold–Resistant Assemblies: Provide and install moisture and mold-resistant glass mat gypsum wallboard products with moisture-resistant surfaces complying with ASTM C1658 where shown and in locations which might be subject to moisture exposure during construction.

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D. Use gypsum boards in maximum practical lengths to minimize number of end joints.

E. Bring gypsum board into contact, but do not force into place.

F. Ceilings:

1. For single-ply construction, use perpendicular application.

2. For two-ply assembles:

a. Use perpendicular application.

b. Apply face ply of gypsum board so that joints of face ply do not occur at joints of base ply with joints over framing members.

G. Walls (Except Shaft Walls):

1. When gypsum board is installed parallel to framing members, space fasteners 300 mm (12 inches) on center in field of the board, and

200 mm (8 inches) on center along edges.

2. When gypsum board is installed perpendicular to framing members, space fasteners 300 mm (12 inches) on center in field and along edges.

3. Stagger screws on abutting edges or ends.

4. For single-ply construction, apply gypsum board with long dimension either parallel or perpendicular to framing members as required to minimize number of joints except gypsum board shall be applied vertically over "Z" furring channels.

5. For two-ply gypsum board assemblies, apply base ply of gypsum board to assure minimum number of joints in face layer. Apply face ply of wallboard to base ply so that joints of face ply do not occur at joints of base ply with joints over framing members.

6. For three-ply gypsum board assemblies, apply plies in same manner as for two-ply assemblies, except that heads of fasteners need only be driven flush with surface for first and second plies. Apply third ply of wallboard in same manner as second ply of two-ply assembly, except use fasteners of sufficient length enough to have the same penetration into framing members as required for two-ply assemblies.

7. No offset in exposed face of walls and partitions will be permitted because of single-ply and two-ply or three-ply application requirements.

8. Installing Two Layer Assembly Over Sound Deadening Board:

a. Apply face layer of wallboard vertically with joints staggered from joints in sound deadening board over framing members.

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b. Fasten face layer with screw, of sufficient length to secure to framing, spaced 300 mm (12 inches) on center around perimeter, and 400 mm (16 inches) on center in the field.

9. Control Joints ASTM C840 and as follows:

a. Locate at both side jambs of openings if gypsum board is not

"yoked". Use one system throughout.

b. Not required for wall lengths less than 9000 mm (30 feet).

c. Extend control joints the full height of the wall or length of soffit/ceiling membrane.

H. Acoustical or Sound Rated Partitions, Fire and Smoke Partitions:

1. Cut gypsum board for a space approximately 3 mm to 6 mm (1/8 to 1/4 inch) wide around partition perimeter.

2. Coordinate for application of caulking or sealants to space prior to taping and finishing.

3. For sound rated partitions, use sealing compound (ASTM C919) to fill the annular spaces between all receptacle boxes and the partition finish material through which the boxes protrude to seal all holes and/or openings on the back and sides of the boxes. STC minimum values as shown.

I. Electrical and Telecommunications Boxes:

1. Seal annular spaces between electrical and telecommunications receptacle boxes and gypsum board partitions.

J. Accessories:

1. Set accessories plumb, level and true to line, neatly mitered at corners and intersections, and securely attach to supporting surfaces as specified.

2. Install in one piece, without the limits of the longest commercially available lengths.

3. Corner Beads:

a. Install at all vertical and horizontal external corners and where shown.

b. Use screws only. Do not use crimping tool.

4. Edge Trim (casings Beads):

a. At both sides of expansion and control joints unless shown otherwise.

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b. Where gypsum board terminates against dissimilar materials and at perimeter of openings, except where covered by flanges, casings or permanently built-in equipment.

c. Where gypsum board surfaces of non-load bearing assemblies abut load bearing members.

d. Where shown.

3.3 INSTALLING GYPSUM SHEATHING

A. Install in accordance with ASTM C840, except as otherwise specified or shown.

B. Use screws of sufficient length to secure sheathing to framing.

C. Space screws 9 mm (3/8 inch) from ends and edges of sheathing and 200 mm (8 inches) on center. Space screws a maximum of 200 mm (8 inches) on center on intermediate framing members.

D. Apply 600 mm by 2400 mm (2 foot by 8 foot) sheathing boards horizontally with tongue edge up.

E. Apply 1200 mm by 2400 mm or 2700 mm (4 ft. by 8 ft. or 9 foot) gypsum sheathing boards vertically with edges over framing.

3.4 CAVITY SHAFT WALL

A. Coordinate assembly with Section 09 22 16, NON-STRUCTURAL METAL

FRAMING, for erection of framing and gypsum board.

B. Conform to UL Design No. U438 Conform to FM WALL CONSTRUCTION 25-1/HR

(Non-loadbearing) for one-hour fire rating where shown.

C. Cut coreboard (liner) panels 25 mm (one inch) less than floor-to-ceiling height, and erect vertically between J-runners on shaft side.

1. Where shaft walls exceed 4300 mm (14 feet) in height, position panel end joints within upper and lower third points of wall.

2. Stagger joints top and bottom in adjacent panels.

D. Gypsum Board:

1. Two hour wall:

a. Erect base layer (backing board) vertically on finish side of wall with end joints staggered. Fasten base layer panels to studs with 25 mm (one inch) long screws, spaced 600 mm (24 inches) on center.

b. Use laminating adhesive between plies in accordance with UL or FM if required by fire test.

c. Apply face layer of gypsum board required by fire test vertically over base layer with joints staggered and attach with screws of

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sufficient length to secure to framing staggered from those in base, spaced 300 mm (12 inches) on center.

2. One hour wall with one layer on finish side of wall: Apply face layer of gypsum board vertically. Attach to studs with screws of sufficient length to secure to framing, spaced 300 mm (12 inches) on center in field and along edges.

3. Where coreboard is covered with face layer of gypsum board, stagger joints of face layer from those in the coreboard base.

E. Treat joints, corners, and fasteners in face layer as specified for finishing of gypsum board.

F. Elevator Shafts:

1. Protrusions including fasteners other than flange of shaft wall framing system or offsets from vertical alignments more than 3 mm

(1/8-inch) are not permitted unless shown.

2. Align shaft walls for plumb vertical flush alignment from top to bottom of shaft.

3.5 FINISHING OF GYPSUM BOARD

A. Finish joints, edges, corners, and fastener heads in accordance with

ASTM C840. Use Level 4 finish for al finished areas open to public view.

B. Before proceeding with installation of finishing materials, assure the following:

1. Gypsum board is fastened and held close to framing or furring.

2. Fastening heads in gypsum board are slightly below surface in dimple formed by driving tool.

C. Finish joints, fasteners, and all openings, including openings around penetrations, on that part of the gypsum board extending above suspended ceilings to seal surface of non decorated smoke barrier, fire rated and sound rated gypsum board construction. After the installation of hanger rods, hanger wires, supports, equipment, conduits, piping and similar work, seal remaining openings and maintain the integrity of the smoke barrier, fire rated and sound rated construction Sanding is not required of non decorated surfaces.

3.6 REPAIRS

A. After taping and finishing has been completed, and before decoration, repair all damaged and defective work, including nondecorated surfaces.

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B. Patch holes or openings 13 mm (1/2 inch) or less in diameter, or equivalent size, with a setting type finishing compound or patching plaster.

C. Repair holes or openings over 13 mm (1/2 inch) diameter, or equivalent size, with 16 mm (5/8 inch) thick gypsum board secured in such a manner as to provide solid substrate equivalent to undamaged surface.

D. Tape and refinish scratched, abraded or damaged finish surfaces including cracks and joints in non decorated surface to provide smoke tight construction fire protection equivalent to the fire rated construction and STC equivalent to the sound rated construction.

3.7 UNACCESSIBLE CEILINGS

At Mental Health and Behavioral Nursing Units, areas accessible to patients and not continuously observable by staff (e.g., patient bedrooms, day rooms), ceilings should be a solid material such as gypsum board. This will limit patient access. Access doors are needed to access electrical and mechanical equipment above the ceiling. These doors should be locked to prevent unauthorized access and secured to ceiling using tamper resistant fasteners.

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SECTION 09 30 13

CERAMIC/PORCELAIN TILING

1.1 DESCRIPTION:

A. This section specifies interior ceramic, porcelain and quarry tile, marble thresholds and window stools, terrazzo divider strips, waterproofing membranes for thin-set applications, crack isolation membranes, and tile backer board.

1.2 RELATED WORK:

A. Preformed expansion joints in tile flooring: Section 07 95 13, EXPANSION JOINT COVER ASSEMBLIES.

B. Sealing of Joints: Section 07 92 00, JOINT SEALANTS.

C. Color, Texture, Pattern, and Size of Field Tile and Trim Shapes, and

Color of Grout Specified: Material Finish Schedule.

D. Metal and Gypsum Lathing and Gypsum Plaster: Section 09 23 00, GYPSUM

PLASTERING.

E. Metal and Resilient Edge Strips at Joints with New Resilient Flooring, and Carpeting: Section 09 65 19, RESILIENT TILE FLOORING and Section 09

68 00, CARPETING.

1.3 SUBMITTALS:

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Samples:

1. Base tile, each type, each color, each size.

2. Mosaic floor tile panels, 228 by 228 mm (9 by 9 inches), each type, color, size and pattern.

3. Paver tile, each size, type, color and pattern.

4. Quarry tile, each type, color, and size.

5. Porcelain tile, each type, color, patterns and size.

6. Wall (or wainscot) tile, each color, size and pattern.

7. Trim shapes, bullnose cap and cove including bullnose cap and base pieces at internal and external corners of vertical surfaces, each type, color, and size.

8. Therapeutic pool tile, panels 305 mm (12 inches) square, each type, size, color, typical lettering and special shapes.

C. Product Data:

1. Ceramic and porcelain tile, marked to show each type, size, and shape required.

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2. Chemical resistant mortar and grout (epoxy and furan).

3. Cementitious backer unit.

4. Dry-set portland cement mortar and grout.

5. Divider strip.

6. Elastomeric membrane and bond coat.

7. Reinforcing tape.

8. Leveling compound.

9. Latex-portland cement mortar and grout.

10. Commercial portland cement grout.

11. Organic adhesive.

12. Slip resistant tile.

13. Waterproofing isolation membrane.

14. Fasteners.

D. Certification:

1. Master grade certificate, ANSI A137.1.

2. Manufacturer's certificates indicating that the following materials comply with specification requirements:

a. Chemical resistant mortar and grout (epoxy and furan).

b. Modified epoxy emulsion.

c. Commercial portland cement grout.

d. Cementitious backer unit.

e. Dry-set portland cement mortar and grout.

f. Elastomeric membrane and bond coat.

g. Reinforcing tape.

h. Latex-portland cement mortar and grout.

i. Leveling compound.

j. Organic adhesive.

k. Waterproof isolation membrane.

l. Factory back mounted tile documentation for suitability for application in wet area.

E. Installer Qualifications:

1. Submit letter stating installer’s experience.

1.4 DELIVERY AND STORAGE:

A. Deliver materials in containers with labels legible and intact and grade-seals unbroken.

B. Store material to prevent damage or contamination.

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1.5 QUALITY ASSURANCE:

A. Installers to be from a company specializing in performing installation of products specified and have a minimum of three (3) years’ experience.

B. Each type and color of tile to be provided from a single source.

C. Each type and color of mortar, adhesive, and grout to be provided from the same source.

1.6 WARRANTY:

A. Construction Warranty: Comply with FAR clause 52.246-21, “Warranty of

Construction”.

1.7 APPLICABLE PUBLICATIONS:

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in text by basic designation only.

B. American National Standards Institute (ANSI):

A10.20-06(R2011)........Safe Operating Practices for Tile, Terrazzo and

Marble WorkA108/A118/A136-14 Installation of

Ceramic Tile

A108.01-13..............Subsurfaces and Preparations by Other Trades

A108.02-13..............Materials, Environmental, and Workmanship

A108.1A-14..............Installation of Ceramic Tile in the Wet-Set

Method with Portland Cement Mortar

A108.1B-10..............Installation of Ceramic Tile on a Cured

Portland Cement Mortar Setting Bed with Dry-Set or Latex-Portland Cement Mortar

A108.1C-10..............Contractors Option; Installation of Ceramic

Tile in the Wet-Set method with Portland Cement

Mortar or Installation of Ceramic Tile on a

Cured Portland Cement Mortar Setting Bed with

Dry-Set or Latex-Portland Cement Mortar

A108.4-09...............Ceramic Tile with Organic Adhesives or Water

Cleanable Tile-Setting Epoxy Adhesive

A108.6-10...............Ceramic Tile with Chemical Resistant, Water

Cleanable Tile-Setting and -Grouting Epoxy

A108.8-10...............Ceramic Tile with Chemical Resistant Furan

Resin Mortar and Grout

A108.10-10..............Grout in Tilework

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A108.13-10..............Load Bearing, Bonded, Waterproof Membranes for

Thin-Set Ceramic Tile and Dimension Stone

A118.1-12...............Dry-Set Portland Cement Mortar

A118.3-13...............Chemical Resistant, Water Cleanable Tile-

Setting and –Grouting Epoxy and Water Cleanable

Tile-Setting Epoxy Adhesive

A118.4-12...............Latex-Portland Cement Mortar

A118.5-10...............Chemical Resistant Furan Mortars and Grouts

A118.6-10...............Cement Grouts for Tile Installation

A118.7-10...............High Performance Cement Grouts for Tile

Installation

A118.9-10...............Cementitious Backer Units

A118.10-14..............Load Bearing, Bonded, Waterproof Membranes for

Thin-Set Ceramic Tile and Dimension Stone

Installation

A136.1-13...............Organic Adhesives for Installation of Ceramic

Tile

A137.1-12...............American National Standard Specifications for

Ceramic Tile

C. ASTM International (ASTM):

A666-10.................Annealed or Cold-Worked Austenitic Stainless

Steel Sheet, Strip, Plate and Flat Bar

A1064/A1064M-14.........Carbon-Steel Wire and Welded Wire

Reinforcement, Plain and Deformed, for Concrete

C109/C109M-13...........Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2 inch. or

[50-mm] Cube Specimens)

C241/C241M-13...........Abrasion Resistance of Stone Subjected to Foot

Traffic

C348-14.................Standard Test Method for Flexural Strength of

Hydraulic-Cement Mortars

C627-10.................Evaluating Ceramic Floor Tile Installation

Systems Using the Robinson-Type Floor Tester

C954-11.................Steel Drill Screws for the Application of

Gypsum Board on Metal Plaster Base to Steel

Studs from 0.033 in (0.84 mm) to 0.112 in (2.84

mm) in thickness

C979/C979M-10...........Pigments for Integrally Colored Concrete

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C1002-14................Steel Self-Piercing Tapping Screws for the

Application of Panel Products

C1027-09................Test Method for Determining Visible Abrasion

Resistance of Glazed Ceramic Tile

C1127-01(R2009).........Standard Guide for Use of High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing

Membrane with an Integral Wearing Surface

C1178/C1178M-13.........Standard Specification for Coated Glass Mat

Water-Resistant Gypsum Backing Panel

C1325-14................Non-Asbestos Fiber-Mat Reinforced Cementitious

Backer Units

C1353/C1353M-09(R2013)..Abrasion Resistance of Dimension Stone

Subjected to Foot Traffic Using a Rotary

Platform, Double-Head Abraser

D1204-14................Test Method for Linear Dimensional Changes of

Nonrigid Thermoplastic Sheeting or Film at

Elevated Temperature

D2240-05(R2010).........Test Method for Rubber Property – Durometer

Hardness

D2497-07(R2012).........Tolerances for Manufactured Organic-Base

Filament Single Yarns

D3045-92(R2010).........Heat Aging of Plastics Without Load

D4397-10................Standard Specification for Polyethylene

Sheeting for Construction, Industrial and

Agricultural Applications

D5109-12................Standard Test Methods for Copper-Clad

Thermosetting Laminates for Printed Wiring

Boards

D. Code of Federal Regulation (CFR):

40 CFR 59...............Determination of Volatile Matter Content, Water

Content, Density Volume Solids, and Weight

Solids of Surface Coating

E. Marble Institute of America (MIA): Design Manual III-2007

F. Tile Council of North America, Inc. (TCNA):

Handbook for Ceramic Tile Installation (2014)

DCOF AcuTest-2012.......Dynamic Coefficient of Friction Test

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2.1 TILE:

A. Comply with ANSI A137.1, Standard Grade, except as modified:

1. Inspection procedures listed under the Appendix of ANSI A137.1.

2. Abrasion Resistance Classification:

a. Tested in accordance with values listed in Table 1, ASTM C1027.

b. Class V, 12000 revolutions for floors in Corridors, Kitchens, Storage including Refrigerated Rooms

c. Class IV, 6000 revolutions for remaining areas.

3. Slip Resistant Tile for Floors:

a. Coefficient of friction, when tested in accordance with

ANSI A137.1 and measured per the TCNA DCOF AcuTest.

1) Equal to or greater than .42 for level interior tile floors that will be walked on when wet.

b. Tile Having Abrasive Grains:

1) Unglazed Ceramic Mosaic Tile: Abrasive grains throughout body of the tile.

2) Quarry Tile: Abrasive grains uniformly embedded in face at rate of approximately 7.5 percent of surface area.

4. Mosaic tile may be mounted or joined together by a resinous bonding material along tile edges.

5. Factory Blending: For tile with color variations, within the ranges selected during sample submittals blend tile in the factory and package so tile units taken from one (1) package show the same range in colors as those taken from other packages and match approved samples.

6. Factory-Applied Temporary Protective Coating:

a. Protect exposed face surfaces (top surface) of tile against adherence of mortar and grout by pre-coating with a continuous film of hot applied petroleum paraffin wax.

b. Do not coat unexposed tile surfaces.

c. Pre-wax tiles set or grouted with furan or epoxy or latex modified mortars.

B. Unglazed Ceramic Mosaic Tile: Nominal 6 mm (1/4 inch) thick with cushion edges.

C. Unglazed Quarry Tile: Nominal 13 mm (1/2 inch) thick, square edges.

D. Glazed Wall Tile: Cushion edges, glazing.

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E. Porcelain Paver Tile: Nominal 8 mm (5/16 inch) thick, with cushion edges. Porcelain tile produced by the dust pressed method are to be made of approximately 50% feldspar; the remaining 50% is to be made up of various high-quality light firing ball clays yielding a tile with a water absorption rate of 0.5% or less and a breaking strength of between 176 to 181 kg (390 to 400 lbs.).

F. Trim Shapes:

1. Conform to applicable requirements of adjoining floor and wall tile.

2. Use trim shapes sizes conforming to size of adjoining field wall tile unless detailed on construction documents or specified otherwise.

3. Internal and External Corners:

a. Square internal and external corner joints are not acceptable.

b. External corners including edges: Use bullnose shapes.

c. Internal corners: Use cove shapes.

d. Base to floor internal corners: Use special shapes providing integral cove vertical and horizontal joint.

e. Base to floor external corners: Use special shapes providing bullnose vertical edge with integral cove horizontal joint. Use stop at bottom of openings having bullnose return to wall.

f. Wall top edge internal corners: Use special shapes providing integral cove vertical joint with bullnose top edge.

g. Wall top edge external corners: Use special shapes providing bullnose vertical and horizontal joint edge.

h. For unglazed ceramic mosaic and glazed wall tile installed in portland cement mortar setting bed, use cove and bullnose shapes as applicable. When ceramic mosaic wall and base tile is required, use C Series cove and bullnose shapes.

i. For unglazed ceramic mosaic and glazed wall tile installed in dry-set portland cement mortar, latex-portland cement mortar, and organic adhesive (thin set methods), use cove and surface bullnose shapes as applicable.

j. For quarry tile work, use cove and bullnose shapes as applicable.

2.2 BACKER UNITS:

A. Cementitious Backer Units:

1. Use in showers or wet areas.

2. Conform to ASTM C1325; Type A.

3. Use in maximum lengths available to minimize end to end butt joints.

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B. Glass Mat Water Resistant Backing Board:

1. Use in showers or wet areas.

2. Conform to ASTM C1178/C1178M.

3. Use in maximum lengths available to minimize end to end butt joints.

2.3 JOINT MATERIALS FOR CEMENTITIOUS BACKER UNITS:

A. Reinforcing Tape: Vinyl coated woven glass fiber mesh tape, open weave, 50 mm (2 inches) wide. Tape with pressure sensitive adhesive backing will not be permitted.

B. Tape Embedding Material: Latex-portland cement mortar complying with

ANSI A108.01.

C. Joint material, including reinforcing tape, and tape embedding material, are to be as specifically recommended by the backer unit manufacturer.

2.4 FASTENERS:

A. Screws for Cementitious Backer Units.

1. Standard screws for gypsum board are not acceptable.

2. Minimum 11 mm (7/16 inch) diameter head, corrosion resistant coated, with washers.

3. ASTM C954 for steel 1 mm (0.033 inch) thick.

4. ASTM C1002 for steel framing less than 0.0329 inch thick.

B. Washers: Galvanized steel, 13 mm (1/2 inch) minimum diameter.

2.5 SETTING MATERIALS OR BOND COATS:

A. Conform to TCNA Handbook for Ceramic Tile Installation.

B. Portland Cement Mortar: ANSI A108.02.

C. Latex-Portland Cement Mortar: ANSI A118.4.

1. For wall applications, provide non-sagging, latex-portland cement mortar complying with ANSI A118.4.

2. Prepackaged Dry-Mortar Mix: Factory-prepared mixture of portland cement; dry, redispersible, ethylene vinyl acetate additive; and other ingredients to which only water needs to be added at Project site.

D. Dry-Set Portland Cement Mortar: ANSI A118.1. For wall applications, provide non-sagging, latex-portland cement mortar complying with

ANSI A118.1.

E. Organic Adhesives: ANSI A136.1, Type 1.

F. Chemical-Resistant Bond Coat:

1. Epoxy Resin Type: ANSI A118.3.

2. Furan Resin Type: ANSI A118.5.

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G. Elastomeric Waterproofing Membrane and Bond Coat:

1. TCNA F122-14 (on ground concrete) and TCNA F112A-14 (above ground concrete).

2. ANSI A118.10.

3. One component polyurethane, liquid applied material having the following additional physical properties:

a. Hardness: Shore "A" between 40-60.

b. Elongation: Between 300-600 percent.

c. Tensile strength: Between .27 - .41 Newton per square millimeter

(40-60 pounds per square inch gauge).

4. Coal tar modified urethanes are not acceptable.

H. Waterproofing Isolation Membrane:

1. Sheet System TCNA F122-14 (on-ground concrete) and TCNA F122A-14

(above-ground concrete).

2. Composite sheet consisting of ASTM D5109, Type II, Grade I

Chlorinated Polyethylene (CM) sheet reinforced on both sides with a non-woven polyester fiber.

3. Designed for use in wet areas as an isolation and positive waterproofing membranes for thin-set bonding of sheet to substrate and thin-set bonding of ceramic and porcelain tile or marble to sheet. Suited for both horizontal and vertical applications.

4. Conform to the following additional physical properties:

Property Units Results Test Method

Hardness Shore A

Points 70-80 ASTM D2240

(10 Second Reading)

Shrinkage Percent 5 maximum ASTM D1204

Brittleness No crack remains flexible at temperature

-37 degrees C

(-35 degrees F)

ASTM D2497

13 mm (1/2-inch) Mandrel Bend

Retention of Properties after Heat Aging

Percent of original

80 Tensile

80 Breaking

80 Elongation

ASTM D3045,

90 degrees C

(194 degrees F) for 168 hours

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5. Manufacturer’s standard sheet size with prefabricated or preformed inside and outside corners.

6. Sheet manufacturer’s solvent welding liquid or xylene and edge sealant.

2.6 GROUTING MATERIALS:

A. Coloring Pigments:

1. Pure mineral pigments, lime proof and nonfading, complying with

ASTM C979/C979M.

2. Coloring pigments may only be added to grout by the manufacturer.

3. Job colored grout is not acceptable.

4. Use is required in Commercial Portland Cement Grout, Dry-Set Grout, and Latex-Portland Cement Grout.

B. Sand-Portland Cement Grout: ANSI A108.10, consisting of white or gray cement and white or colored aggregate as required to produce color indicated.

C. Standard Cement Grout: ANSI A118.6.

D. High Performance Tile Grout: ANSI A118.7 with a VOC content of 65 g/L or less when calculated according to 40 CFR 59 (EPA Method 24).

1. Polymer Type: Ethylene vinyl acetate or acrylic additive, in dry, redispersible form, prepackaged with other dry ingredients.

2. Polymer Type: Acrylic resin or styrene-butadiene rubber in liquid-latex form for addition to prepackaged dry-grout mix.

E. Water-Cleanable Epoxy Grout: ANSI A118.3 with a VOC content of 65 g/L or less when calculated according to 40 CFR 59 (EPA Method 24).

1. Provide product capable of withstanding continuous and intermittent exposure to temperatures of up to 60 and 100 degrees C (140 and

212 degrees F), respectively, and certified by manufacturer for intended use.

2.7 PATCHING AND LEVELING COMPOUND:

A. Portland cement base, polymer-modified, self-leveling compound, manufactured specifically for resurfacing and leveling concrete floors.

Products containing gypsum are not acceptable.

B. Provide a patching and leveling compound with the following minimum physical properties:

1. Compressive strength - 25 MPa (3500 psig) per ASTM C109/C109M.

2. Flexural strength - 7 MPa (1000 psig) per ASTM C348 (28 day value).

3. Tensile strength – 4.1 MPa (600 psi) per ANSI 118.7.

4. Density – 1.9.

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C. Capable of being applied in layers up to 38 mm (1-1/2 inches) thick without fillers and up to 101 mm (4 inches) thick with fillers, being brought to a feather edge, and being trowelled to a smooth finish.

D. Primers, fillers, and reinforcement as required by manufacturer for application and substrate condition.

E. Ready for use in 48 hours after application.

2.8 METAL DIVIDER STRIPS:

A. Terrazzo type divider strips.

B. Heavy top type strip with 5 mm (3/16 inch) wide top and 38 mm

(1 1/2 inch) long leg. Height to match tile and setting-bed thickness.

C. Embedded leg perforated and deformed for keying to mortar.

D. Stainless-steel, ASTM A666, 300 Series exposed-edge material.

2.9 WATER:

A. Clean, potable and free from salts and other injurious elements to mortar and grout materials.

2.10 CLEANING COMPOUNDS:

A. Specifically designed for cleaning masonry and concrete and which will not prevent bond of subsequent tile setting materials including patching and leveling compounds and elastomeric waterproofing membrane and coat.

B. Materials containing acid or caustic Material are not acceptable.

2.11 FLOOR MORTAR BED REINFORCING:

A. ASTM A1064/A1064M welded wire fabric without backing, MW3 x MW3

(2 x 2-W0.5 x W0.5).

2.12 POLYETHYLENE SHEET:

A. Polyethylene sheet conforming to ASTM D4397.

B. Nominal thickness: 0.15 mm (6 mils).

3.1 ENVIRONMENTAL REQUIREMENTS:

A. Maintain ambient temperature of work areas at not less than

16 degrees C (60 degrees F), without interruption, for not less than 24 hours before installation and not less than three (3) days after installation.

B. Maintain higher temperatures for a longer period of time where required by manufacturer's recommendation and ANSI Specifications for installation.

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C. Do not install tile when the temperature is above 38 degrees C

(100 degrees F).

D. Do not install materials when the temperature of the substrate is below

16 degrees C (60 degrees F).

E. Do not allow temperature to fall below 10 degrees C (50 degrees F) after third day of completion of tile work.

3.2 ALLOWABLE TOLERANCE:

A. Variation in plane of sub-floor, including concrete fills leveling compounds and mortar beds:

1. Not more than 6 mm in 3048 mm (1/4 inch in 10 feet) from required elevation where portland cement mortar setting bed is used.

2. Not more than 3 mm in 3048 mm (1/8 inch in 10 feet) where dry-set portland cement, and latex-portland cement mortar setting beds and chemical-resistant bond coats are used.

B. Variation in Plane of Wall Surfaces:

1. Not more than 6 mm in 2438 mm (1/4 inch in 8 feet) from required plane where portland cement mortar setting bed is used.

2. Not more than 3 mm in 2438 mm (1/8 inch in 8 feet) where dry-set or latex-portland cement mortar or organic adhesive setting materials is used.

3.3 SURFACE PREPARATION:

A. Cleaning New Concrete or Masonry:

1. Chip out loose material, clean off all oil, grease dirt, adhesives, curing compounds, and other deterrents to bonding by mechanical method, or by using products specifically designed for cleaning concrete and masonry.

2. Use self-contained power blast cleaning systems to remove curing compounds and steel trowel finish from concrete slabs where ceramic tile will be installed directly on concrete surface with thin-set materials.

3. Steam cleaning or the use of acids and solvents for cleaning will not be permitted.

B. Patching and Leveling:

1. Mix and apply patching and leveling compound in accordance with manufacturer's instructions.

2. Fill holes and cracks and align concrete floors that are out of required plane with patching and leveling compound.

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a. Thickness of compound as required to bring finish tile system to elevation shown on construction documents.

b. Float finish except finish smooth for elastomeric waterproofing.

c. At substrate expansion, isolation, and other moving joints, allow joint of same width to continue through underlayment.

3. Apply patching and leveling compound to concrete and masonry wall surfaces that are out of required plane.

4. Apply leveling coats of material compatible with wall surface and tile setting material to wall surfaces, other than concrete and masonry that are out of required plane.

C. Mortar Bed for Slopes to Drains:

1. Slope compound to drain where drains are shown on construction documents.

2. Install mortar bed in depressed slab sloped to drains not less than

3.2 mm in 305 mm (1/8 inch per foot).

3. Allow not less than 50 mm (2 inch) depression at edge of depressed slab.

4. Screed for slope to drain and float finish.

5. Cure mortar bed for not less than seven (7) days. Do not use curing compounds or coatings.

6. Perform flood test to verify mortar bed slopes to drain before installing tile. Contracting Officer Representative (COR) to be present during flood test.

D. Additional preparation of concrete floors for tile set with epoxy, or furan-resin is to be in accordance with the manufacturer's printed instructions.

E. Cleavage Membrane:

1. Install polythene sheet as cleavage membrane in depressed slab when waterproof membrane is not scheduled or indicated.

2. Turn up at edge of depressed floor slab to top of floor.

F. Walls:

1. In showers or other wet areas cover studs with polyethylene sheet.

2. Apply patching and leveling compound to concrete and masonry surfaces that are out of required plane.

3. Apply leveling coats of material compatible with wall surface and tile setting material to wall surfaces, other than concrete and masonry that are out of required plane.

4. Apply metal lath to framing in accordance with ANSI A108.1:

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a. Use fasteners specified in paragraph "Fasteners." Use washers when lath opening is larger than screw head.

b. Apply scratch and leveling coats to metal lath in accordance with

ANSI A108.1C.

c. Total thickness of scratch and leveling coats:

1) Apply 9 mm to 16 mm (3/8 inch to 5/8 inch) thick over solid backing.

2) 16 mm to 19 mm (5/8 to 3/4 inch) thick on metal lath over studs.

3) Where wainscots are required to finish flush with wall surface above, adjust thickness required for flush finish.

d. Apply scratch and leveling coats more than 19 mm (3/4 inch) thick in two (2) coats.

G. Existing Floors and Walls:

1. Remove existing composition floor finishes and adhesive. Prepare surface by grinding, chipping, self-contained power blast cleaning or other suitable mechanical methods to completely expose uncontaminated concrete or masonry surfaces. Follow safety requirements of ANSI A10.20.

2. Remove existing concrete fill or topping to structural slab. Clean and level the substrate for new setting bed and waterproof membrane or cleavage membrane.

3. Where new tile bases are required to finish flush with plaster above or where they are extensions of similar bases in conjunction with existing floor tiles, cut channel in floor slab and expose rough wall construction sufficiently to accommodate new tile base and setting material.

3.4 CEMENTITIOUS BACKER UNITS:

A. Remove polyethylene wrapping from cementitious backer units and separate to allow for air circulation. Allow moisture content of backer units to dry down to a maximum of 35 percent before applying joint treatment and tile.

B. Install in accordance with ANSI A118.9 except as specified otherwise.

C. Install units horizontally or vertically to minimize joints with end joints over framing members. Units with rounded edges; face rounded edge away from studs to form a “V” joint for joint treatment.

D. Secure cementitious backer units to each framing member with screws spaced not more than 203 mm (8 inches) on center and not closer than

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13 mm (1/2 inch) from the edge of the backer unit or as recommended by backer unit manufacturer. Install screws so that the screw heads are flush with the surface of the backer unit.

E. Where backer unit joins shower pans or waterproofing, lap backer unit over turned up waterproof system. Install fasteners only through top one-inch of turned up waterproof systems.

F. Do not install joint treatment for seven (7) days after installation of cementitious backer unit.

G. Joint Treatment:

1. Fill horizontal and vertical joints and corners with latex-portland cement mortar. Apply fiberglass tape over joints and corners and embed with same mortar.

2. Leave 6 mm (1/4 inch) space for sealant at lips of tubs, sinks, or other plumbing receptors.

3.5 GLASS MAT WATER-RESISTANT BACKING BOARD:

A. Install in accordance with manufacturer’s instructions.

TCNA Systems…