VA Addendum-Revision Set 3.pdf

VA Project: Renovate MH Ward 1L, 1H, and 1K

VA Project #: 618-17-127

VA Addendum Items: Revision Set 3 Date: April 6, 2021

Technical Question Tracking Sheet

Revise prior response as follows:

Question 36:

Delete: “See Question 3 and 7.”

Replace with: “See Question 34 and 38”

Question 46:

Delete: “See responses to question 16, 19 and clarifications in Addendum 2 on sheets

AD101-P1, and A101-P1”

Replace with: “See responses to question 47, 50 and clarifications in Addendum 2 on sheets

AD101-P1, and A101-P1”

Question 49:

Delete: “Refer to response to question 48, 87, and 90. See Addendum 2”

Replace with: “Refer to response to question 79, 118, and 121. See Addendum2”

Question 50:

Delete: “See question 109. See Phase 1 amendment for additional Phase 1 operations.”

Replace with: “See question 140. See Addendum 2 for additional Phase 1 revisions.”

Question 69:

Delete: “Refer to response to item 90.”

Replace with: “Refer to response to item 121.”

Question 73:

Delete: “See response for item 89.”

Replace with: “See response for item 120.”

Question 78:

Delete: “See item 87.”

Replace with: “See item 118.”

Question 91:

Delete: “As per the prior addendum, specification section 084113 applies only to Frame type 1. Finish and Installer information is as specified within this section. Also, note response to item #59 for matching finish.”

Replace with: “As per the prior addendum, specification section 084113 applies only to Frame type 1. Finish and Installer information is as specified within this section. Also, note response to item #90 for matching finish.”

Question 110:

Delete: “Please note question 6.”

Replace with: “Please note question 37”

Question 115:

Delete: “See response to question 48.”

Replace with: “There is no Area C, but locations for corner guards are addressed in the response to question 79.” Refer to specifications for Corner Guard height.

Question 120:

Delete: “See Question 83.”

Replace with: “See Question 114.”

Question 134:

Delete: “Please note question 6”

Replace with: “Please note question 37”

Question 140:

Delete: “AF101.P1 identifies location of beds to be relocated from 1K as 'Single' or

'Double' rooms. See question 116 for additional Phase 1 operations.”

Replace with: “AF101.P1 identifies location of beds to be relocated from 1K as 'Single' or

'Double' rooms. See question 46 for additional Phase 1 operations.”

Question 141:

Delete: “Yes. Beds are Norix Attenda. Detail with manufacturer. See question 116 for additional Phase 1 operations.”

Replace with: “Yes. Beds are Norix Attenda. Detail with manufacturer. See question 46 for additional Phase 1 operations.`”

DRAWING REVISIONS

SHEET A102: Delete O.H. Coiling Door 1L-136 from Floor Plan. Delete O.H. Coiling door 1L-135 from

Floor Plan.

SHEET A701: Delete O.H. Coiling Door 1L-136 from Door Schedule. Delete O.H. Coiling door 1L-135 from

Door Schedule.

SHEET AF-001: Color Schedule, Add:

a. TERR-1, Terrazzo Flooring, color TBD.

b. TERR-2, Terrazzo Flooring, color TBD.

SHEET AF-001: Architectural Finish Plan, Change:

a. WSF-3 to TERR-1 per drawing below (Color TBD).

b. LVT -2 to TERR-2 per drawing below (Color TBD).

SHEET AF-002: Room Finish Schedule – Phase 2,

a. Change Floor finish of 1K-130 DINING to “TERR-1 (Color TBD)”

b. Change Floor finish of C1-62 CORRIDOR to “TERR-2 (Color TBD).”

SPECIFICATIONS: ADD Section(s):

09 67 23.50 Resinous Terrazzo Flooring (RES-5)

ATTACHMENTS:

Specification Section: 09 67 23.50 Resinous Terrazzo Flooring (RES-5)

01-01-21

09 67 23.50 - 1

SECTION 09 67 23.50

RESINOUS TERRAZZO FLOORING (RES-5)

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies resinous terrazzo flooring systems with integral cove base.

B. Resinous (Epoxy or urethane Terrazzo) Flooring Systems:

1. Thin set: Epoxy or Urethane Matrix Terrazzo.

2. Thin set: Polyacrylate Matrix Terrazzo.

1.2 RELATED WORK

A. Concrete and Moisture Vapor Barrier: Section 03 30 00, CAST-IN-PLACE

CONCRETE.

B. Substrate Preparation for Floor Finishes: Section 09 05 16.

C. Sealants installed with Terrazzo: Section 07 92 00, JOINT SEALANTS.

1.3 SUBMITTALS

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

DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Description of each product to be provided.

2. Application and installation instructions.

3. Maintenance Instructions: Submit manufacturer’s written instructions for recommended maintenance practices.

C. Qualification Data: For Installer.

D. Sustainable Submittal:

1. Product data for products having recycled content, submit documentation indicating percentages by weight of postconsumer and pre-consumer recycled content.

a. Include statements indicating costs for each product having recycled content.

2. Product data for field applied adhesives include printed statement of VOC content indicating compliance with environmental requirements.

E. Samples:

1. Each color and texture specified in Section 09 06 00, SCHEDULE FOR

FINISHES.

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2. Samples for verification: For each (color and texture) resinous flooring system required, 6 inches (152 mm) square, applied to a rigid backing by installer for this project.

3. Sample showing construction from substrate to finish surface in thickness specified and color and texture of finished surfaces.

Finished flooring must match the approved samples in color and texture.

4. Accessories: (6 inches) 152 mm long sample of exposed strip item.

F. Shop Drawings: Include plans, sections, component details, and attachment to other trades. Indicate layout of the following:

1. Patterns.

2. Edge configurations.

3. Divider strips.

4. Control-joint strips.

5. Accessory strips.

6. Abrasive strips.

G. Certifications and Approvals:

1. Manufacturer's certification of material and substrata compliance with specification.

2. Manufacturer's approval of installers.

3. Contractor's certificate of compliance with Quality Assurance requirements.

H. Warranty: As specified in this section.

1.4 QUALITY ASSURANCE

A. Manufacture Certificate: Manufacture shall certify that a particular resinous flooring system has been in use for a minimum of five years.

B. Installer Qualifications: Engage an experienced installer (applicator) who is experienced in applying resinous flooring systems similar in material, design, and extent to those indicated for this project for a minimum period of 5 years, whose work has resulted in applications with a record of successful in-service performance, and who is acceptable to resinous flooring manufacturer.

1. Engage an installer who is certified in writing by resinous flooring manufacturer as qualified to apply resinous flooring systems indicated.

2. Contractor shall have completed at least 10 projects of similar size and complexity. Include list of at least 5 projects. List must

09 67 23.50 - 3 include owner (purchaser); address of installation, contact information at installation project site; and date of installation.

3. Installer's Personnel: Employ persons trained for application of specified product

C. Source Limitations:

1. Obtain primary resinous flooring materials including primers, resins, hardening agents, grouting coats and finish or sealing coats from a single manufacturer.

2. Provide secondary materials, including marble chips aggregate, strips, patching and fill material, joint sealant, and repair material of type and from source recommended by manufacturer of primary materials.

3. Obtain marble chips aggregate color, grade, type, and variety of granular materials from one source with resources to provide materials of consistent quality in appearance and physical properties.

4. Material furnished shall meet NTMA Specifications.

D. NTMA Standards: Comply with NTMA’s “Terrazzo Specification and Design

Guide” and written recommendations for terrazzo type indicated unless more stringent requirements are specified.

E. Mockups: Apply mockups to verify selections made under sample submittals and to demonstrate aesthetic effects and establish quality standards for materials and execution.

1. Apply full-thickness mockups on 48 inch (1200 mm) square floor area selected by VA COR.

a. Include 48 inch (1200 mm) length of integral cove base.

2. Approved mockups may become part of the completed work if undisturbed at time of Substantial Completion.

3. Sign off from VA COR on texture must be complete before installation of flooring system.

F. Pre-Installation Conference:

1. Convene a meeting not less than thirty days prior to starting work.

2. Attendance:

a. Contractor

b. VA COR

c. Manufacturer and Installer's Representative

3. Review the following:

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a. Environmental requirements

1) Air and surface temperature

2) Relative humidity

3) Ventilation

4) Dust and contaminates

b. Protection of surfaces not scheduled to be coated

c. Inspect and discus condition of substrate and other preparatory work performed

d. Review and verify availability of material; installer’s personnel, equipment needed

e. Design and patterns and edge conditions.

f. Performance of the coating with chemicals anticipated in the area receiving the resinous (epoxy terrazzo) flooring system

g. Application and repair

h. Field quality control

i. Cleaning

j. Protection of coating systems

k. One-year inspection and maintenance

l. Coordination with other work

G. Manufacturer’s Field Services: Manufacturer’s representative shall provide technical assistance and guidance for surface preparation and application of coating systems.

H. Contractor Job Site Log: Contractor shall document daily; the work accomplished environmental conditions and any other condition event significant to the long term performance of the terrazzo installation.

The Contractor shall maintain these records for one year after

Substantial Completion.

1.5 MATERIAL PACKAGING DELIVERY AND STORAGE

A. Deliver materials to the site in original sealed packages or containers, clearly marked with the manufacturer's name or brand, type and color, production run number and date of manufacture.

B. Protect materials from damage and contamination in storage or delivery, including moisture, heat, cold, direct sunlight, etc.

C. Maintain temperature of storage area between 60 and 80 degrees F (15 and 26 degrees C).

D. Keep containers sealed until ready for use.

E. Do not use materials beyond manufacturer’s shelf life limits.

09 67 23.50 - 5

1.6 PROJECT CONDITIONS

A. Environmental Limitations: Comply with resinous flooring manufacturer's written instructions for substrate temperature, ambient temperature, moisture, ventilation, and other conditions affecting resinous flooring applications.

1. Maintain material and substrate temperature between 65 and 85 degrees F (18 and 30 degrees C) during resinous flooring application and for not less than 24 hours after application.

2. Concrete substrate shall be properly cured per referenced section 03

30 00, CAST-IN-PLACE CONCRETE. Standard cure time a minimum of 30 days. A vapor barrier must be present for concrete subfloors on or below grade.

a. Resinous flooring applications where moisture testing resulting in readings exceeding limits as defined in this specification under part 3, section 3.4, paragraph B, shall employ an multiple component 15 mil thick system designed to suppress excess moisture in concrete.

b. Application at a minimum thickness of 15 mils, over properly prepared concrete substrate as defined in section 3.4.

c. Moisture suppression system must meet the design standards as follows:

3.

Property Test Value

Tensile Strength

ASTM D638 4,400 psi

Volatile Organic Compound

Limits (V.O.C.)

EPA & LEED 25 grams per liter

Permeance ASTM E96 @ 16mils/

0.4mm on concrete

0.1 perms

Tensile Modulus ASTM D638 1.9X105 psi

Percent Elongation ASTM D638 12%

Cure Rate Per manufactures

Data

4 hours Tack free with 24hr recoat window

Bond Strength ASTM D7234 100% bond to concrete failure

09 67 23.50 - 6

B. Lighting: Provide permanent lighting or, if permanent lighting is not in place, simulate permanent lighting conditions during resinous flooring application.

C. Close spaces to traffic during resinous flooring application and for not less than 24 hours after application, unless manufacturer recommends a longer period.

1.7 WARRANTY

A. Work subject to the terms of the Article “Warranty of Construction” FAR clause 52.246-21.

B. Warranty: Manufacture shall furnish a single, written warranty covering the full assembly (including substrata) for both material and workmanship for a extended period of (3) full years from date of installation, or provide a joint and several warranty signed on a single document by manufacturer and applicator jointly and severally warranting the materials and workmanship for a period of (3) full years from date of installation. A sample warranty letter must be included with bid package or bid may be disqualified.

1.8 APPLICABLE PUBLICATIONS

A. The publication 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. ASTM Standard C722-04 (2012), "Standard Specification for Chemical-

Resistant Monolithic Floor Surfacings," ASTM International, West

Conshohocken, PA, 2006, DOI: 10.1520/C0722-04R12, www.astm.org.

1. Specification covers the requirements for aggregate-filled, resin-based, monolithic surfacings for use over concrete.

C. ASTM International(ASTM):

C109/C109M-20b..........Compressive Strength of Hydraulic Cement

Mortars

C307-18.................Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic Surfacings

C413-18.................Absorption of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings and Polymer

Concretes

C531-18.................Linear Shrinkage and Coefficient of Thermal

Expansion of Chemical-Resistant Mortars, 09 67 23.50 - 7

Grouts, Monolithic Surfacings, and Polymer

Concretes

C579-18.................Compressive Strength of Chemical-Resistant

Mortars, Grouts, Monolithic Surfacings, and

Polymer Concretes

C580-18.................Flexural Strength and Modulus of Elasticity of

Chemical-Resistant Mortars, Grouts, Monolithic

Surfacings, and Polymer Concretes

D638-14.................Tensile Properties of Plastics

D790-17.................Flexural Properties of Unreinforced and

Reinforced Plastics and Electrical Insulating

Materials

D130802(2013)...........Effect of Household Chemicals on Clear and

Pigmented Organic Finishes

D2240-15e1..............Rubber Property—Durometer Hardness

D4060-19................Abrasion Resistance of Organic Coatings by the

Taber Abraser

D4259-18................Abrading Concrete to alter the surface profile of the concrete and to remove foreign materials and weak surface laitance

D7234-19................Pull-Off Adhesion Strength of Coatings on

Concrete Using Portable Pull-Off Adhesion

Testers

E96/E96M-16.............Water Vapor Transmission of Materials

F1679-04e1..............Variable Incidence Tribometer for determining the slip resistance

F1869-16a...............Measuring Moisture Vapor Emission Rate of

Concrete Subfloor Using Anhydrous Calcium

Chloride

F2170-19a...............Determining Relative Humidity in Concrete Floor

Slabs Using in situ Probes

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION FOR RESINOUS (EPOXY TERRAZZO) FLOORING

A. System Descriptions:

1. Monolithic, multi-layer, trowel applied multi-component epoxy or urethane composition terrazzo and integral cove base. UV stable and breathable where required.

B. Systems shall meet or exceed all applicable NTMA and TTMAC standards.

09 67 23.50 - 8

C. System Components: Verify specific requirements as systems vary by manufacturer. Verify compatibility with substrate. Use manufacturer’s standard components, compatible with each other and as follows:

1. Bond Coat (Primer): Verify inclusion of primer in manufacturer’s system. Some systems are self-priming.

a. Resin: Epoxy.

b. Formulation Description: 100 percent solids.

c. Binder: Formulated to meet physical properties of MIL-D-3134F.

d. Application Method: Apply by spray, brush, or roller.

1) Thickness of coats: Verify thickness as systems vary by manufacturer; approximate range from 5 to 6 mils (0.13 to 0.15

mm) to 150 to 250 square feet per gallon (52.76 to 87.93 square meters per liter).

2. Body Coat:

a. Resin: Epoxy or Urethane.

b. Formulation Description: 100 percent solids.

c. Application Method: Varies by manufacturer; hand or power troweled.

1) Trowel application:

a) Thickness of coat: Verify thickness as systems vary by manufacturer; approximate range from 3/16 inch or 1/4 inch or 3/8 inch (4.76 to either 6.35 mm or 9.5 mm).

b) Number of coats: One.

d. Aggregates: Verify amount per thickness as systems vary by manufacturer:

1) Marble (#1 size maximum), glass, or granite chips or, colored resilient aggregates, acrylic, or other approved materials.

3. Grout Coat:

a. Resin: Epoxy.

b. Formulation Description: 100 percent solids.

c. Application Method: Varies by manufacturer. Apply by red rubber squeegee or spring-steel trowel.

1) Apply to rough ground mortar coat to completely fill all voids.

2) Thickness of coat: Verify thickness as systems vary by manufacturer; approximate range from a minimum of 8 to 10 mils

(0.2 to 0.25 mm) to a maximum of 400 to 500 square feet per gallon (140.65 to 175.81 square meters per liter).

09 67 23.50 - 9

4. Seal Coat/Top Coat:

a. Resin: Single- or multi-component Urethane.

b. Formulation Description: 100% solids. It shall have a pH factor between 7 and 10 and shall be a penetrating type specially prepared for use on terrazzo. It shall not discolor or amber the terrazzo and shall produce a slip resistant surface. Flash point of sealer shall be a minimum of 80 degrees F (26 degrees C) when tested in accordance with ASTM D56.

c. Application Method: Varies by manufacturer. Apply using notched squeegee and backroll or using a lambs wool applicator.

1) Apply to fine ground mortar coat to completely fill all voids.

2) Thickness of coat: Verify thickness as systems vary by manufacturer; approximate range from a minimum of 4 to 5 mils

(0.1 to 0.13 mm) to a maximum of 500 to 750 square feet per gallon (175.81 to 263.74 square meters per liter).

3) Number of coats: One.

d. Aggregates: Verify inclusion of slip-retardant aggregates in seal coat/top coat.

e. Textured Top Coat: Slip Resistant in accordance with UL 410.

D. System Characteristics:

1. Color and Pattern: As selected by VA COR from manufacturer's standard colors.

2. Integral cove base: 1 inch (25.4 mm) radius epoxy mortar cove keyed into concrete substrate. Verify cove base installation with manufacturer’s system.

3. Overall System Thickness: Verify thickness as systems vary by manufacturer; approximate range from a minimum of 3/16 inch (4.76

mm) to a maximum of either 1/4 inch or 3/8 inch (6.35 mm or 9.5 mm).

4. Finish: Standard anti-slip resistant to meet or exceed 0.06 dry;

0.08 wet.

E. Physical Properties:

1. Conform to ASTM C722, Type A, Epoxy resin, and quartz aggregate.

2. Resilient Urethane Terrazzo products physical properties

3. Other physical properties of seamless troweled (quartz epoxy) resinous flooring system in addition to C722 when tested to be as follows:

Test Property Value

ASTM C109 Compressive Strength 4000 PSI

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Test Property Value

ASTM C307 Tensile Strength 800 PSI

ASTM D2240 Hardness Shore D 85/65

ASTM C413 Water Absorption < 0.5%

ASTM C531 Thermal Coefficient of

Linear Expansion

4.7 x 10 -8

ASTM C579 Compressive Strength 6000 PSI

ASTM C580 Flexural 2000 to 4500 psi

ASTM D638 Tensile Strength 3000 psi

ASTM D790 Flexural Modulus 500000 psi

ASTM D2240 Shore D Surface Hardness 80-90

ASTM D4060, CS-17 Abrasive Resistance 0<0.1 gm max weight loss

ASTM F1679 Co-efficient of

Friction

Dry - 0.81

Wet - 0.56

Bond Strength ASTM D7234 100% bond to concrete failure

F. Chemical Resistance in accordance ASTM D1308 - 02(2007) “Standard Test

Method for Effect of Household Chemicals on Clear and Pigmented Organic

Finishes”. ASTM International, West Conshohocken, PA, 2006, DOI:

10.1520/D1308-02R07, www.astm.org. No effect to the following exposures:

1. Acetic acid (5%)

2. Ammonium hydroxide (10%)

3. Citric Acid (50%)

4. Fatty Acid

5. Motor Oil, 20W

6. Hydrochloric acid (20%)

7. Sodium Chloride

8. Sodium Hypochlorite (10%)

9. Sodium Hydroxide (30%)

10. Sulfuric acid (25%)

11. Urine, Feces

12. Hydrogen peroxide (10%)

2.2 SUPPLEMENTAL MATERIALS

A. Waterproofing Membrane: Type recommended or produced by manufacturer of resinous (epoxy terrazzo) flooring for type of service and conditions.

09 67 23.50 - 11

B. Crack Isolation Membrane: Type recommended or produced by manufacturer of resinous floor coating.

C. Anti-Microbial Additive: Incorporate anti-microbial chemical additive to prevent growth of most bacteria, algae, fungi, mold, mildew, yeast, etc.

D. Strips:

1. Dividing strips “L” shaped as manufactured for use with resinous

(Epoxy Terrazzo) flooring system.

a. White alloy zinc, 14 (1.897mm) gauge.

b. Plastic dividing strip may be used upon recommendation of material manufacturer only.

2. Control Joint double “L” shaped strips as manufactured for use with resinous (Epoxy Terrazzo) flooring system. Position strips back to back.

a. White alloy zinc, 14 (1.897mm) gauge.

b. Plastic dividing strips may be used upon recommendation of material manufacturer only.

E. Patching and Fill Material: Resinous product of or approved by resinous

(Terrazzo) flooring manufacturer for application indicated.

F. Joint Sealant: Type recommended or produced by resinous flooring manufacturer for type of service or joint conditioned indicated.

2.3 BASE CAP STRIP

A. Aluminum, Extruded:

B. Shape for 3/16 inch (4.76 mm) depth of base material, "J" configuration.

C. Finish:

1. Finish exposed surfaces in accordance with NAAMM Metal Finishes

Manual.

2. Aluminum: NAAMM Amp 501:

a. Clear anodic coating, AA-C22A41 chemically etched medium matte, with Architectural Class 1, 0.018 mm (0.7 mils) or thicker.

D. Optional zinc strips can be used in some applications. Shape for 2mm, in “J” or “L” Configurations

09 67 23.50 - 12

PART 3 - EXECUTION

3.1 INSPECTION

A. Examine the areas and conditions where resinous (epoxy terrazzo) flooring system with integral base is to be installed with the VA COR.

B. Moisture Vapor Emission Testing: Perform moisture vapor transmission testing in accordance with ASTM F1869 to determine the MVER of the substrate prior to commencement of the work.

1. MVT threshold for resinous (terrazzo) flooring shall not exceed 3 pounds/1000 square feet in a 24 hour period.

2. When MVT emission exceeds this limit, apply manufacturer’s recommended vapor control primer or other corrective measures as recommended by manufacturer prior to application of flooring or membrane systems.

3. Perform additional substrata preparation as recommended by resinous flooring manufacturer’s technical representative to obtain satisfactory results of moisture vapor transmission testing prior to commencement of the work.

4. Provide a written report showing test placement and results.

3.2 PROJECT CONDITIONS

A. Maintain temperature of rooms (air and surface) where work occurs, between 70 and 90 degrees F (21 and 32 degrees C) for at least 48 hours, before, during, and 24 hours after installation. Maintain temperature at least 70 degrees F (21 degrees C) thereafter.

B. Maintain relative humidity less than 85 percent.

C. Do not install materials until building is permanently enclosed and wet construction is complete, dry, and cured.

D. Maintain proper ventilation of the area during application and curing time period.

1. Comply with infection control measures of the VA Medical Center.

3.3 INSTALLATION REQUIREMENTS

A. The manufacturer's instructions for application and installation shall be reviewed with the VA COR for the resinous (terrazzo) flooring system with integral cove base.

B. Substrata shall be approved by manufacture technical representative.

3.4 PREPARATION

A. General: Prepare and clean substrates according to resinous flooring manufacturer's written instructions for substrate indicated. Provide clean, dry, and neutral Ph substrate for resinous flooring application.

09 67 23.50 - 13

B. Concrete Substrates: Provide sound concrete surfaces free of laitance, glaze, efflorescence, curing compounds, form-release agents, dust, dirt, grease, oil, and other contaminants incompatible with resinous flooring.

1. Mechanically prepare substrates as follows:

a. Shot-blast surfaces with an apparatus that abrades the concrete surface, contains the dispensed shot within the apparatus, and recirculates the shot by vacuum pickup.

b. Comply with ASTM D4259 requirements, unless manufacturer's written instructions are more stringent.

2. Repair damaged and deteriorated concrete according to resinous flooring manufacturer's written recommendations.

3. Verify that concrete substrates are dry.

a. Perform in situ probe test, ASTM F 2170. Proceed with application only after substrates do not exceed a maximum potential equilibrium relative humidity of 85 percent.

b. Perform maximum moisture-vapor-emission test, ASTM F 1869.

Proceed with application only after substrates has obtained satisfactory results. If needed perform additional moisture tests until substrates pass testing.

4. Verify that concrete substrates have neutral Ph and that resinous flooring will adhere to them. Perform tests recommended by manufacturer. Proceed with application only after substrates pass testing.

C. Resinous Materials: Mix components and prepare materials according to resinous flooring manufacturer's written instructions.

D. Use patching and fill material to fill holes and depressions in substrates according to manufacturer's written instructions.

E. Treat control joints and other nonmoving substrate cracks to prevent cracks from reflecting through resinous flooring according to manufacturer's written recommendations. Allowances should be included for flooring manufacturer recommended joint fill material, and concrete crack treatment.

F. Prepare wall to receive integral base:

1. Verify wall material is acceptable for resinous flooring application, if not, install material (e.g. cement board) to receive base.

09 67 23.50 - 14

2. Fill voids in wall surface to receive base, install undercoats (e.g.

water proofing membrane, and/or crack isolation membrane) as recommended by resinous flooring manufacturer.

3. Grind, cut or sand protrusions to receive base application.

3.5 APPLICATION

A. General: Apply each component of resinous (epoxy terrazzo) flooring system with integral base according to manufacturer’s directions to produce a uniform monolithic flooring surface of thickness indicated.

1. Verify that the substrate (dryness, pH level, etc.) is acceptable by the manufacturer’s technical representative.

2. Use manufacturer recommended cleaning products.

B. Prepare substrata for resinous (terrazzo) flooring system:

1. Apply waterproof membrane as recommended by resinous flooring manufacturer at all vertical junctures and the entire flooring substrata. Embed fabric reinforcement into waterproof membrane liquid. Overlap all seams a minimum of 2 inches (51 mm).

2. Apply crack isolation membrane as recommended by resinous flooring manufacturer.

3. Apply substrata smoothing/patching underlayment as recommended by resinous flooring manufacturer.

C. Resinous (epoxy terrazzo) flooring system: Per manufacturer’s written instructions. Based on the porosity of the substrata additional coats may be required:

1. Primer (Bond) Coat.

2. Strips: Set divider and control strips as indicated on plans.

Strips shall be set in a full bed of epoxy adhesive and allowed to cure before proceeding with the work.

3. Body Coat: Apply body coat (including aggregate) evenly over the primer (bond) coat to the desired thickness.

4. Power grind to expose aggregate.

5. Grout Coat.

6. Progressively fine grind and polish floor. Cleanse terrazzo with potable water and rinse. Remove excess rinse water and apply grout using identical Portland cement, color pigments as used in topping, ensuring to fill all voids. Cure Grout as recommended by manufacturer.

a. Grout may be left on terrazzo until all heavy and messy work in project is completed.

09 67 23.50 - 15

b. Fine grind until all grout is removed from surface.

c. Upon completion, terrazzo flooring shall display a minimum of 70% of marble chips aggregate.

7. Cleaning: Wash all surfaces with a neutral cleaner. Rinse with clean water and allow surface to dry

8. Seal Coat (Top Coat). Apply sealing coats of type recommended by manufacturer to produce finish matching approved samples.

9. Cove base: Apply cove base mix to wall surfaces at locations shown to form cove base to form 4-inch (101 mm) cove base height. Follow manufacturer’s instructions and details including taping, mixing, priming, troweling, grinding, polishing, and top-coating of cove base.

a. When wall surface is not concrete, concrete masonry unit, install cement board and/or exterior grade plywood at locations shown to form cove base.

3.6 TOLERANCE

A. From line of plane: Maximum 1/8 inch (3.18 mm) in total distance of flooring and base.

B. From radius of cove: Maximum of 1/8 inch (3.18 mm) plus or 1/16-inch

(1.59 mm) minus.

3.7 CURING, PROTECTION AND CLEANING

A. Cure resinous terrazzo flooring in compliance with manufacturer's directions (during the application process), taking care to prevent contamination during stages of application and prior to completion of curing process.

B. Close area of application for a minimum of 24 hours.

C. Protect resinous (epoxy terrazzo) flooring materials from damage and wear during construction operation.

1. Cover flooring with wax paper or Kraft paper.

2. Cover paper with 1/4 inch (6.35 mm) thick hardboard, plywood, or particle board where area is in foot or vehicle traffic pattern, rolling or fixed scaffolding and overhead work occurs.

D. Remove temporary covering and clean resinous (Epoxy Terrazzo) flooring just prior to final inspection. Use cleaning materials and procedures recommended by resinous (Epoxy Terrazzo) flooring manufacturer.

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