SECTION 075419 - POLYVINYL-CHLORIDE (PVC) ROOFING_Amendment2.pdf

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 1

6-7-126 Minos High Bay Roof Replacement

SECTION 075419 - POLYVINYL-CHLORIDE (PVC) ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Adhered Polyvinyl chloride (PVC) roofing system.

2. Water Based Adhesive (Feltback)

3. Accessory roofing system materials.

4. Substrate board.

5. Vapor retarder.

6. Roof insulation and accessories.

7. Coverboard.

8. Walkway Pads.

B. Section contains the installation of sound-absorbing insulation strips in ribs of acoustical steel roof deck. Sound-absorbing insulation strips are furnished under Section 053100 "Steel Decking."

C. Related Requirements: Refer to the following specification sections:

1. Section 014100 Quality Requirements

2. Section 053100 "Steel Decking" for roof deck panels

3. Section 061000 "Rough Carpentry" for wood nailers, curbs, and blocking; and for wood-based, structural-use roof deck panels.

4. Section 076200 "Sheet Metal Flashing and Trim" for metal roof flashings and counterflashings.

5. Section 077273 “Membrane Integrity Test systems”

6. Exhibit A documents-:

a. Section 013300 Submittals,

b. Section 0100100 General Requirements,

c. Section 013100 ESH Requirements.

1.2 DEFINITIONS

A. Roofing Terminology: Definitions in ASTM D1079 and glossary in NRCA's "Roofing Manual: Membrane Roof Systems" apply to Work of this Section.

B. Sheet metal terminology and techniques: SMACNA “Architectural Sheet Metal Manual.”

1.3 PREINSTALLATION MEETINGS

A. Preliminary Roofing Conference: Before starting roof deck construction, conduct conference at Minos Service Building, FIMS no. 785.The project is located on the

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 2

Fermi National Accelerator Laboratory (Fermilab) Site, adjacent to the city of Batavia, Illinois. The project is in Kane County, located on South side of Pine Street. Access to building is from Indian Creek Road and Schwahn Road. Refer to sheet G-01 for vicinity map

1. Meet with Fermilab representatives, Fermilab Architect, Fermilab Construction Coordinator, Building manager, and ESH safety representative.

2. Review of Hazard Analysis.

3. Review methods and procedures related to roofing installation, including manufacturer's written instructions.

4. Review and finalize construction schedule, and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

5. Review deck substrate requirements for conditions and finishes, including flatness and fastening.

6. Review structural loading limitations of roof deck during and after roofing.

7. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that affects roofing system.

8. Review governing regulations and requirements for insurance and certificates if applicable.

9. Review temporary protection requirements for roofing system during and after installation.

10. Review roof observation and repair procedures after roofing installation.

1.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Each submittal to include transmittal provided by Fermilab. Refer to section 013300 Submittals for more information.

B. Shop Drawings: Include roof plans, sections, details, and attachments to other work, including the following:

1. Roof plan showing orientation of roof deck and orientation of roofing membrane, fastening spacings, and patterns for corner, perimeter, and field-of-roof locations.

2. Crickets, saddles, and tapered edge strips, including slopes.

3. Tie-in with adjoining wall system air barrier.

4. Layout and thickness of insulation.

5. Tapered insulation layout, thickness, and slopes.

6. Insulation fastening patterns for corner, perimeter, and field-of-roof locations.

7. Base and sheet flashings and membrane termination details.

8. Flashing details at penetrations.

10. Roof Curbs and flashing details.

11. Sarnabar details

12. Overflow scupper details

13. Reglet and flashing at masonry wall.

C. Samples for Verification: For the following products:

1. Roofing membrane and flashings, of color required.

2. Walkway pads, of color required.

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D. Wind-Uplift-Resistance Submittal: For roofing system, indicating compliance with wind-uplift performance requirements.

1.5 INFORMATIONAL SUBMITTALS

A. Manufacturer Certificates:

1. Performance Requirement Certificate: Signed by roofing membrane manufacturer, certifying that roofing system complies with requirements specified in "Performance Requirements" Article.

a. Submit evidence of compliance with specified performance requirements.

2. Special Warranty Certificate: Signed by roofing membrane manufacturer, certifying that all materials supplied under this Section are acceptable for special warranty.

B. Product Test Reports: For roofing membrane and insulation, tests performed by an independent qualified testing agency indicating compliance with specified requirements.

C. Research Reports: For components of roofing system, from FM Approvals’ RoofNav Listing showing compliance with specified performance requirements.

D. Sample warranties.

1.6 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing system.

B. Certified statement from existing roofing system manufacturer stating that existing roof warranty has not been affected by the Work performed under this Section.

C. As-Built Record Documents and Final Acceptance Documents in pdf form as per Section 010010 General Requirements

1.7 PROVIDE ATTIC STOCK

A. Subcontractor shall furnish attic stock equal to 2% of the total installed PVC membrane area, with a minimum of one full roll of the membrane used on the project.

B. Attic Stock shall be the same manufacturer, product line, thickness, color, and formulation as installed on the roof.

C. Subcontractor shall also provide the following:

1. 2% of installed quantity of PVC cover strip, flashing membrane, or field-fabricated detail membrane.

2. One box of fasteners and plates matching those used in the installation (or equivalent quantity for adhered systems).

3. One box of manufacturer-approved sealant used with the system.

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4. Any proprietary termination bars or edge-metal accessories required for long-term repairs (minimum: one 8-foot length of each type used).

D. Packaging and Labeling:

1. All attic stock materials shall be:

2. Delivered in original, unopened manufacturer packaging.

3. Labeled with project name, membrane type, thickness, and color.

4. Provided to the Owner at the completion of the roofing work.

E. Storage

1. Subcontractor shall deliver attic stock to the Owner’s designated storage location and provide instructions for proper storage and maintenance requirements of the PVC materials.

1.8 QUALITY ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer that is ULSE listed, listed in FM Approvals' RoofNav, listed in SPRI's "Directory of Roof Assemblies"] for roofing system identical to that used for this Project.

B. Roofing System Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturers’ special warranty.

1. Certified Roofing System Installer: Entity that employs a supervisor who is an NRCA ProCertified Roofing Foreman or installers who are NRCA ProCertified thermoplastic system installers.

2. Certified Roofing System Installer must be approved, authorized, or licensed in writing by the PVC sheet roofing system manufacturer and have a minimum of (five) 5 years’ experience as an approved, authorized, or licensed applicator with that manufacturer.

3. Certified Roofing System Installer must be approved at a level capable of providing the specified 30-year warranty.

4. Certified Roofing System Installer must supply the names, locations and client contact information of five projects, within the previous three years, of similar size and scope that the applicator has constructed using manufacturer’s roofing products submitted for this project.

5. Roofing installation shall not commence until pull test results have been reviewed and accepted by the roofing manufacturer. This will be required for the 30 year warranty.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Deliver roofing system materials to Project site in original containers with unbroken seals and labeled with manufacturer's name, product brand name and type, date of manufacture, approval or listing agency markings, and directions for storing and mixing with other components.

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B. Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing system manufacturer.

1. Protect stored liquid material from direct sunlight.

2. Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.

C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources.

1. Store in a dry location.

2. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.

D. Handle and store roofing system materials and place equipment in a manner to avoid permanent deflection of deck.

1.10 FIELD CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing system to be installed in accordance with manufacturer's written installation instructions and warranty requirements.

1.11 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of roofing system that fail in materials or workmanship within specified warranty period.

1. Special warranty to include all components of roofing system, such as substrate board, vapor retarder, roof insulation, fasteners, adhesives, cover board, roofing membrane, base flashing sheet, walkway(s) pads, and other components of roofing system.

2. Warranty to include the basic wind speed of 120 mph.

3. Warranty Period: 30 years from date of Substantial Completion.

4. No Early Bird Warranties shall be issued on this project; must pass an inspection by technical representative prior to the release of the warranty.

B. Roofing System Installer's Warranty: Submit roofing system Installer's warranty, on warranty form at end of this Section, signed by roofing system Installer, covering the Work of this Section, including all components of roofing system, such as substrate board, vapor retarder, roof insulation, fasteners, adhesives, cover board, roofing membrane, base flashing sheet, walkway(s) pads, and other components of roofing system.

1. Warranty Period: 5 years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 SOURCE LIMITATIONS

A. Obtain components for roofing system from roofing membrane manufacturer.

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2.2 PERFORMANCE REQUIREMENTS

A. General Performance: Installed roofing system and flashings to withstand specified uplift pressures, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction.

Roofing system and flashings to remain watertight.

1. Accelerated Weathering: Roofing membrane to withstand 2000 hours of exposure when tested in accordance with ASTM G152, ASTM G154, or ASTM G155.

2. Impact Resistance: Roofing membrane to resist impact damage when tested in accordance with ASTM D3746/D3746M, ASTM D4272/D4272M, or the Resistance to Foot Traffic Test in FM Approvals 4470.

B. Material Compatibility: Roofing system materials to be compatible with one another and adjacent materials under conditions of service and application required, as demonstrated by roofing membrane manufacturer based on testing and field experience.

C. Wind-Uplift Resistance: Design roofing system to resist the following wind-uplift pressures when tested in accordance with FM Approvals 4474, UL 580, or UL 1897:

1. Zone 1' (Roof Area Interior): 28 lbf/sq. ft. (kPa) .

2. Zone 1 (Roof Area Field): -48.7 lbf/sq. ft. (kPa).

3. Zone 2 (Roof Area Perimeter): -67.3lbf/sq. ft. (kPa) .

a. Location: From roof edge to 21.7 ft. inside roof edge.

4. Zone 3 (Roof Area Corners): -87.6 lbf/sq. ft. (kPa) .

a. Location: 21.7 inches in each direction from building corner.

b. Location: From roof edge to 7.2 ft inside roof edge.

D. FM Approvals' RoofNav Listing: Roofing membrane, base flashings, and component materials to comply with requirements in FM Approvals 4450 or FM Approvals 4470 as part of a roofing system and are listed in FM Approvals' RoofNav for Class 1 or noncombustible construction, as applicable. Identify materials with FM Approvals Certification markings.

1. Fire/Windstorm Classification: Class 1A-90.

2. Hail-Resistance Rating: FM Global Property Loss Prevention Data Sheet 1-34

SH .

E. SPRI's "Directory of Roof Assemblies" Listing: Roofing membrane, base flashings, and component materials to comply with requirements in FM Approvals 4450 or FM Approvals 4470 as part of a roofing system and are listed in SPRI's "Directory of Roof Assemblies" for roof assembly identical for that specified for this Project.

1. Wind-Uplift Load Capacity 90 psf.

F. Solar Reflectance Index (SRI): Three-year-aged SRI not less than 90 when calculated in accordance with ASTM E1980, based on testing identical products by a qualified testing agency.

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G. Cool Roof Rating Council (CRRC): Roofing system to be listed by the CRRC for low-slope roof products.

H. Exterior Fire-Test Exposure: Class A; for application and roof slopes indicated; when tested by a qualified testing agency in accordance with ASTM E108 or UL 790.

1. Identify products with appropriate markings of applicable testing agency.

I. Fire-Resistance Ratings: Comply with fire-resistance-rated assembly designs indicated.

1. Identify products with appropriate markings of applicable testing agency.

2.3 POLYVINYL CHLORIDE (PVC) ROOFING SYSTEM

A. PVC Roofing Membrane Sheet: ASTM D4434/D4434M, fabric reinforced.

1. Reinforced PVC membrane shall be 80 mil minimum membrane thickness.

Nominal thickness membranes and membranes whose stated thickness includes fleece, felt, fabric backing, or other non-waterproofing materials are not acceptable.

2. Manufacturers: Subject to compliance with requirements, provide products by the following :

a. Sika Corporation-Roofing & Waterproofing

3. Basis-of-Design Product: Subject to compliance with requirements, provide Sika

Sarnafil Adhered Assembly – RoofNav Assembly No. 461650-0-0

a. Sika Sarnafil G410-80 mil -80 (minimum 80 mil thickness).

b. Approved equals shall provide a minimum 80 mil membrane thickness meeting all specified performance requirements. No substitutions or alternatives will be permitted.(issued in Addendum #2)

4. Nominal 80 mil membranes are not

5. Classification: Type II with fabric backing .

6. Minimum Thickness: 80 mils (2.0 mm).

7. Exposed Face Color: White.

2.4 ACCESSORY ROOFING SYSTEM MATERIALS

A. General: Accessory materials as recommended in writing by roofing membrane manufacturer for intended use and compatible with other roofing system components.

1. Adhesives and Sealants: Comply with VOC limits of authorities having jurisdiction.

2. Verify adhesives and sealants comply with the following limits for VOC content:

a. Plastic Foam Adhesives: 50 g/L.

b. Gypsum Board and Panel Adhesives: 50 g/L.

c. Multipurpose Construction Adhesives: 70 g/L.

d. Fiberglass Adhesives: 80 g/L.

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e. Contact Adhesives: 80 g/L.

f. PVC Welding Compounds: 510 g/L.

g. Other Adhesives: 250 g/L.

h. Single-Ply Roof Membrane Sealants: 450 g/L.

i. Nonmembrane Roof Sealants: 300 g/L.

j. Sealant Primers for Nonporous Substrates: 250 g/L.

k. Sealant Primers for Porous Substrates: 775 g/L.

B. Base and Sheet Flashings: Manufacturer's standard sheet flashing of same material, type, reinforcement, thickness, and color as roofing membrane.

1. Any vertical surface, such as parapet walls and curbs, that has asphalt residue on the substrate subcontractor to install Sarnafil G459 PVC Membrane as recommended by manufacturer.

C. Prefabricated Pipe Flashings: As recommended in writing by roofing membrane manufacturer.

D. Water-Based, Fabric-Backed Membrane Adhesive: Roofing membrane manufacturer's standard water-based, cold-applied adhesive formulated for compatibility and use with fabric-backed roofing membrane.

E. Low-Rise, Urethane, Fabric-Backed Membrane Adhesive: Roofing membrane manufacturer's standard spray-applied, low-rise, two-component urethane adhesive formulated for compatibility and use with fabric-backed roofing membrane.

F. Slip Sheet: Manufacturer's standard, of thickness required for application.

G. Asphalt-Coated, Glass-Fiber-Mat, Venting Base Sheet: ASTM D4897/D4897M, Type II; nonperforated, asphalt impregnated fiberglass reinforced, with mineral granular patterned surfacing on bottom surface.

H. Metal Termination Bars: Manufacturer's standard, predrilled stainless steel or aluminum bars, approximately 1 by 1/8 inch (25 by 3 mm) thick; with anchors.

I. Metal Battens: Manufacturer's standard, aluminum-zinc-alloy-coated or zinc-coated steel sheet, approximately 1 inch wide by 0.05 inch thick (25 mm wide by 1.3 mm thick), prepunched.

J. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening roofing system components to substrate, tested for required pullout strength, and acceptable to roofing membrane manufacturer.

K. Safety Accessories: Roofing membrane manufacturer's standard yellow seaming tape for designating safety perimeters and rooftop hazards.

L. Miscellaneous Accessories: As recommended in writing by roofing membrane manufacturer.

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A. Glass-Mat Gypsum Roof Substrate Board: ASTM C1177/C1177M, water-resistant gypsum board.

2.5 SUBSTRATE BOARD

1. Manufacturers: Subject to compliance with requirements, provide products by the following:

a. Georgia-Pacific Gypsum LLC

2. Basis-of-Design Product: Subject to compliance with requirements, provide Georgia Pacific DensDeck Prime Roof Board or comparable product by one of the following:

3. Thickness:1/2 inch (13 mm)].

4. Surface Finish: Prime.

B. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening substrate board to roof deck.

C. Bonding Adhesive: Manufacturer's standard, designed for adhering substrate board to roof deck.

1. Basis of Design: Sarnacol - 2163 adhesive, Sarnacol AD Board Adhesive as per manufacturers guidelines.

2.6 VAPOR RETARDER

A. Rubberized-Asphalt-Sheet Vapor Retarder, Self-Adhering: ASTM D1970/D1970M, polyethylene film laminated to layer of rubberized asphalt adhesive, minimum 106-mil (2.7-mm) total thickness; maximum permeance rating of 0.010 perm (0.543 ng/Pa x s x sq. m); cold applied, with slip-resisting surface and release paper backing. Provide primer when recommended by vapor retarder manufacturer.

1. Manufacturers: Subject to compliance with requirements, provide products by the following :

a. Sika Sarnafil

2. Basis-of-Design Product: Subject to compliance with requirements, provide Sika

Vapor Retarder SA 106.

3. Permeance Rating: Not more than 0.010 perm (0.543 ng/Pa x s x sq. m) when tested in accordance with ASTM E96/E96M.

4. Flame-Spread Index: Not more than 5 when tested in accordance with ASTM

E84.

5. Smoke-Developed Index: Not more than 35 when tested in accordance with

ASTM E84.

6. Tape: Pressure-sensitive tape of type recommended by vapor retarder manufacturer for sealing joints and penetrations in vapor retarder.

2.7 ROOF INSULATION AND ACCESSORIES

A. General: Preformed roof insulation boards manufactured by roofing membrane manufacturer approved for use in FM Approvals' RoofNav listed roof assemblies.

1. Manufacturers: Subject to compliance with requirements, provide products by the following :

a. Sika Corporation-Roofing & Waterproofing

2. Basis-of-Design Product: Subject to compliance with requirements, provide Sika Sarnatherm ISO

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3. Thermal Resistance: R-value of 5.0 per 1 inch (25 mm).

4. Size: 48 by 48 inches (1200 by 1200 mm) .

5. Thickness:

a. Base Layer: 2.6 inch.

b. Upper Layer: 2.6 inch.(Tapered)

6. PSI: 25

B. Polyisocyanurate Board Insulation: ASTM C1289, Type II, Class 1, Grade 3, felt or glass-fiber mat facer on both major surfaces.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Sika Sarnatherm ISO (tapered]

2. Thermal Resistance: Total R-value total of 30 (approximately R-value of 5.0 per 1 inch (25 mm).

3. Compressive Strength: Grade 3, 25 psi (172 kPa)] .

4. Size: 48 by 48 inches (1200 by 1200 mm)][

5. Thickness:

a. Base Layer: 2.6 inch.

b. Upper Layer: 2.6 inch (Tapered)

C. General: Roof insulation accessories as recommended in writing by insulation manufacturer for intended use and compatibility with other roofing system components.

1. Insulation Adhesive: Insulation manufacturer's standard adhesive formulated to attach roof insulation to substrate and to another insulation layer as follows:

a. Bead-applied, low-rise, one-component or multicomponent urethane adhesive.

b. Full-spread, spray-applied, low-rise, two-component urethane adhesive.

2. Insulation Fasteners: Insulation manufacturer's standard factory-coated steel fasteners with metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening roof insulation and cover board to substrate, and acceptable to roofing system manufacturer.

2.8 COVER BOARD

A. General: Cover board as recommended in writing by roofing membrane manufacturer for intended use and compatible with other roofing system components.

B. Glass-Mat Gypsum Cover Board: ASTM C1177/C1177M, water-resistant gypsum board.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Georgia Pacific DensDeck Prime.

2. Thickness: 1/2 inch (13 mm.

3. Surface Finish: Unprimed .

B. Protection Mat: Woven or nonwoven polypropylene, polyolefin, or polyester fabric, water permeable and resistant to UV degradation, type and weight as recommended in writing by roofing system manufacturer for application.

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2.9 ELECTRONIC LEAK-DETECTION (ELD) MATERIALS

A. Conductive Medium: Electrically conductive material specifically designed to enable ELD testing procedures as approved in writing by roofing membrane manufacturer.

1. Conductive medium to be located directly under roofing membrane in accordance with ASTM D7877 and ASTM D8231.

B. Moisture-Monitoring System: Permanently embedded, continuously monitored moisture-detection system.

1. Sensors measuring moisture content to be placed within roofing system and connected to a monitoring program, with a notification indicating location of breach.

C. Basis-of-Design Manufacturer: Subject to compliance with requirements, provide membrane integrity test system and service by International Leak Detection (ILD), (866)282-LEAK, ((866)282-5325), info@leak-detection.com, with the characteristics outlined in Specification SECTION 077273 EFVM-VMG Membrane Integrity Test System.

2.10 FLUID MEMBRANE AT MASONRY WALLS

A. Provide a fully reinforced, fluid-applied membrane at masonry wall surfaces as per manufacturer guidelines, consisting of Sika Sikalastic RoofPro components with Sika Reemat reinforcement integrated into base layer.

1. Membrane System : Sikalastic Roof Pro 30 system with Sika Reemat Premium reinforcement.

2. Base Layer: Sikalastic 641 Lo-VOC, 50 mils wet-film thickness; approximately 32

sq. ft. per gallon coverage rate.

3. Top Layer No. 1: Sikalastic 641 Lo-VOC, 23 mils wet-film thickness;

approximately 69 sq. ft. per gallon coverage rate.

4. Top Layer No. 2: Sikalastic 641 Lo-VOC, 38 mils wet-film thickness;

approximately 42 sq. ft. per gallon coverage rate.

5. Total System Thickness: 111 mils wet-film thickness.

2.11 WALKWAYS

A. Flexible Walkways: Factory-formed, nonporous, heavy-duty, slip-resisting, surface-textured walkway pads, approximately 5/8inch (15.8 mm) thick and acceptable to roofing system manufacturer.

1. Basis of Design Product: Subject to compliance with requirements, provide Sika Crossgrip Xtra walkway mat. Rolled-out walkway protection mat loose laid on top of completed roof assemblies consisting of 0.625” (15.8) thick flexible PVC with cross-directional textured ribs.

2. Size: Approximately 36” wide for length refer to drawings. Length to be verified

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in field.

3. Color: Yellow.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with roofing system Installer present, for compliance with requirements and other conditions affecting performance of the Work.

1. Verify that roof openings and penetrations are in place, curbs are set and braced, and roof-drain bodies are securely clamped in place.

2. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations and that nailers match thicknesses of insulation.

3. Verify that surface plane flatness and fastening of steel roof deck complies with requirements in Section 053100 "Steel Decking."

4. Verify that concrete substrate is visibly dry and free of moisture, and that minimum concrete internal relative humidity is not more than 75 percent, or as recommended by roofing system manufacturer, when tested in accordance with

ASTM F2170.

a. Test Frequency: One test probe per each 1000 sq. ft. (93 sq. m), or portion thereof, of roof deck, with no fewer than three test probes.

b. Submit test reports within 24 hours of performing tests.

5. Verify that concrete-curing compounds that will impair adhesion of roofing components to roof deck have been removed.

6. Verify that joints in precast concrete roof decks have been grouted flush with top of concrete.

B. Subcontractor to coordinate any existing electrical conduit locations and/or equipment within existing flutes of adjacent metal decking prior to mechanically fastening. Confirmation with Fermilab Construction Coordinator is required.

1. The Contractor shall be responsible for locating and marking all existing utilities and before commencing any work. If the Contractor fails to locate or mark such utilities, and such failure results in damage to any utility, the Contractor shall be solely responsible for all costs, including but not limited to repair, replacement, relocation, and consequential damages, as well as all delay and disruption costs.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Subcontractor to carefully inspect and survey conditions immediately beneath the roof

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deck.

B. Subcontractor to coordinate any electrical conduit locations and/or equipment within existing flutes of metal decking prior to mechanically fastening. Conduits and/or equipment must be located, coordinated, and marked on roofing materials prior to installation of any mechanical fasteners. Confirmation with Fermilab Construction Coordinator is required.

C. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing system installation in accordance with roofing system manufacturer's written instructions. Remove sharp projections.

D. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction. Remove roof-drain plugs when no work is taking place or when rain is forecast.

E. Prime surface of concrete deck with primer in accordance with roofing system manufacturer's written installation instructions and allow primer to dry.

F. Perform fastener-pullout tests in accordance with roofing system manufacturer's written instructions.

1. Submit test result within 24 hours of performing tests.

a. Include manufacturer's requirements for any revision to previously submitted fastener patterns required to achieve specified wind uplift requirements.

3.3 INSTALLATION OF SUBSTRATE BOARD

A. Install substrate board with long joints in continuous straight lines, with end joints staggered not less than 24 inches (600 mm) in adjacent rows.

1. Refer to section 3.2 Preparation paragraph A and B for locating existing conduits/equipment in existing flutes of metal decking.

2. Install substrate board at right angle to flutes of steel roof deck. Locate end joints over crests of steel roof deck.

3. Tightly butt substrate boards together.

5. Cut substrate board to fit tight around penetrations and projections, and to fit tight to intersecting sloping roof decks.

6. Fasten substrate board to top flanges of steel deck in accordance with manufacturer's written installation instructions and FM Approvals' RoofNav listed roof assembly requirements for specified Windstorm Resistance Classification and FM Global Property Loss Prevention Data Sheet 1-29.

7. Fasten substrate board to top flanges of steel deck to resist uplift pressure at corners, perimeter, and field of roof in accordance with roofing system manufacturers' written installation instructions.

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3.4 INSTALLATION OF VAPOR RETARDER

A. Install vapor retarder in a single layer over roof area in accordance with manufacturer's written installation instructions, side and end lapping each sheet a minimum of 2 and 6 inches (50 and 150 mm), respectively.

1. Extend vertically up parapet walls and projections to a minimum height equal to height of insulation and cover board.

2. Continuously seal side and end laps with mastic or approved sealant.

B. Completely seal vapor retarder at terminations, obstructions, and penetrations to prevent air movement into roofing system.

3.5 INSTALLATION OF ROOF INSULATION AND ACCESSORIES

A. Coordinate installation of roofing system components so insulation is not exposed to precipitation or left exposed at end of workday.

B. Comply with roofing system and insulation manufacturer's written installation instructions. Install minimum of two layers of insulation under area of roofing to achieve required thickness.

C. Install each layer of insulation with joints staggered not less than 24 inches (600 mm) in adjacent rows and offset not less than 12 inches (300 mm) from previous layer.

1. Trim insulation neatly to fit around penetrations and projections, and to fit tightly to intersecting sloping roof decks.

2. Make joints between adjacent insulation boards not more than 1/4 inch (6 mm) in width.

3. At internal roof drains, slope insulation to create a square drain sump, with each side equal to the diameter of the drain bowl plus 24 inches (600 mm).

4. Trim insulation, so that water flow is unrestricted.

5. Fill gaps exceeding 1/4 inch (6 mm) with insulation.

6. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetrations.

7. Secure insulation in accordance with FM Approvals' RoofNav for specified Windstorm Resistance Classification .

8. Secure insulation to resist specified uplift pressure at corners, perimeter, and field of roof.

3.6 INSTALLATION OF VECTOR MAPPING GRID

A. Install Vector Mapping Grid (VMG) on insulation under coverboard in accordance with leak detection system manufacturers requirements and Specification SECTION

077273 MEMBRANE INTEGRITY TEST SYSTEMS.

1. Fasten Vector Mapping Grid in accordance with leak detection system

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 15

manufacturer's requirements.

2. Do not place Vector Mapping Grid where it will be in continuous direct contact with structural components.

3. Provide minimum 2 inch (50 mm) overlap where adjacent sheets meet, including side laps and end laps.

4. Vector Mapping Grid is to be cut as close as possible to the perpendicular strand at both end and side edges

B. Conductor Wire: Install conductor wire on top of membrane at spacing and layout indicated on approved shop drawings.

1. Secure conductor wire using method recommended by manufacturer.

C. Installation Testing: Verify continuity and functioning of conductor wire [and measurement grid] upon completion of installation

3.7 INSTALLATION OF COVER BOARD

A. Install cover board over insulation with long joints in continuous straight lines with end joints staggered between rows. Offset joints of insulation below a minimum of 6 inches (150 mm) in each direction.

1. Trim cover board neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

2. At internal roof drains, conform to slope of drain sump.

a. Trim cover board so that water flow is unrestricted.

3. Cut and fit cover board tight to nailers, projections, and penetrations.

4. Adhere cover board to substrate in accordance with FM Approvals' RoofNav listed roof assembly requirements for specified Windstorm Resistance Classification]and FM Global Property Loss Prevention Data Sheet 1-29.

B. Install slip sheet over cover board and immediately beneath roofing membrane.

C. Place plates on cover board in required fastening patterns to achieve FM rating and secure in accordance with roofing system manufacturer's written installation instructions.

1. Install plates and fasteners tight and flat to substrate with no dimpling, and with fastener extending 1 inch (25 mm) minimum into roof deck; do not overdrive fasteners.

3.8 INSTALLATION OF PVC ROOFING MEMBRANE

A. Install roofing membrane over roof area for adhered application method in accordance with roofing system manufacturer's written installation instructions.

B. Unroll roofing membrane and allow it to relax before installing.

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 16

C. Start installation in presence of roofing system manufacturer's technical personnel .

D. Accurately align roofing membrane and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps. Apply roofing membrane with side laps shingled with slope of roof deck where possible.

E. Adhered Application: Apply bonding adhesive to substrate and underside of roofing membrane at rate required by manufacturer and allow to partially dry before installing roofing membrane. Do not apply to splice area of roofing membrane.

1. In addition to adhering, mechanically fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing.

2. Induction-Weld Attachment: Secure roofing membrane to plates creating 100 percent bond between underside of membrane and top of plates; a partial bond is unacceptable. Test welds to verify adhesion of roofing membrane to top of plates in accordance with manufacturer's instructions.

3. Adhere roofing membrane at perimeter, corners, and transitions in accordance with requirements in ANSI/SPRI RP-4.

4. Verify field strength of seams a minimum of twice daily, and repair seam sample areas.

5. Repair tears, voids, and lapped seams in roofing membrane that do not comply with requirements.

F. Spread sealant bed over deck-drain flange at roof drains, and securely seal roof membrane in place with clamping ring.

3.9 INSTALLATION OF BASE AND SHEET FLASHINGS

A. General: Install and adhere base and sheet flashings and preformed flashing accessories to substrates in accordance with roofing system manufacturer's written installation instructions.

B. Apply bonding adhesive to substrate and underside of flashings at required rate and allow to partially dry. Do not apply to seam area of flashing.

C. Flash penetrations and field-formed inside and outside corners.

D. Clean seam areas, overlap, and firmly roll flashings into the adhesive. Hot-air-weld side seams and end laps to ensure a watertight installation.

E. Terminate and seal top of flashings and mechanically anchor to substrate through termination bars.

3.10 INSTALLATION OF FLUID MEMBRANE AT MASONRY WALL

A. Install of fluid membrane in accordance with roofing system manufacturer’s written installation instructions.

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 17

B. Prepare masonry substrate per manufacturer written installation instructions.

Substrate shall be clean, sound, dry and free of contaminants that may impair adhesion.

C. Base Layer Application: Apply Sikalastic 641 Lo-VOC at 50 mils WFT. Embed Sika Reemat Premium fully into the wet base layer, ensuring wrinkles are removed and reinforcement is fully saturated.

D. Top layers application: After curing per manufacturer’s guidelines, apply the first top layer at 23 mils WFT, followed by the second top layer at 38 mils WFT.

E. System Integration: Ensure all transitions, edges, terminations, penetrations, and changes in plane comply with Sika’s published details for RoofPro systems.

F. Quality Assurance: Thicknesses shall be verified using a wet-film thickness gauge during installation. All work shall comply with Sika technical data sheets and warranty requirements.

3.11 INSTALLATION OF WALKWAYS

A. Flexible Walkways: Install walkway products in accordance with manufacturer's written instructions.

1. Install flexible walkways at the following locations:

a. Perimeter of each rooftop unit.

b. Between each rooftop unit location, creating a continuous path connecting rooftop unit locations.

c. Between each roof hatch and each rooftop unit location or path connecting rooftop unit locations.

d. Top and bottom of each roof access ladder.

e. Between each roof access ladder and each rooftop unit location or path connecting rooftop unit locations.

f. Locations indicated on Drawings.

g. As required by roofing membrane manufacturer's warranty requirements.

2. Probe all existing membrane seams which are to be covered by Crossgrip XTRA.

Crossgrip XTRA is installed loose laid. Connecting clips are available for attaching roll ends together.

3.12 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to perform tests and inspect substrate conditions, surface preparation, and application of roofing membrane, flashings, protection, and drainage components, and to furnish reports to Architect.

B. Tests and Inspections:

1. ELD Testing: Testing agency surveys entire roof area and flashings to locate

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 18

discontinuities in the roofing membrane using ELD in accordance with ASTM D7877 and ASTM D8231.

a. After testing, repair areas of discontinuities, repeat tests, and make further repairs until roofing and flashing installations are contiguous.

1) Cost of retesting is Contractor's responsibility.

b. Testing agency to prepare survey report indicating locations of initial discontinuities, if any.

C. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion, in presence of Architect, and to prepare inspection report.

1. Notify Architect and Fermilab Construction Coordinator 48 hours in advance of date and time of inspection.

D. Repair or remove and replace components of roofing system where inspections indicate that they do not comply with specified requirements.

E. Additional testing and inspecting, at Contractor's expense, will be performed to determine if replaced or additional work complies with specified requirements.

1. Roofing system will be considered defective if it does not pass tests and inspections.

F. Prepare test and inspection reports.

3.13 PROTECTING AND CLEANING

A. Protect roofing system from damage and wear during remainder of construction period.

1. When remaining construction does not affect or endanger roofing, inspect roofing system for deterioration and damage, describing its nature and extent in a written report, with copies to Architect and Owner.

B. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and in accordance with warranty requirements.

C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 19

3.14 ROOFING SYSTEM INSTALLER'S WARRANTY

A. WHEREAS _______________________________ of ___________________________, herein called the "Roofing System Installer," has performed roofing and associated Work on the following Project:

1. Owner: Fermilab National Accelerator Laboratory (Fermilab)

2. Owner Address: PO Box 500, Batavia, IL 60510-5011 .

3. Building Name/Type: NUMSB Minos High Bay, FIMS 785 .

4. Building Address: . Schwahn Road

5. Area of Work: Equipment number R785R01 (High Bay) .

6. Warranty Period: Five years from date of Substantial Completion.

7. Date of Substantial Completion: __________________.

B. AND WHEREAS Roofing System Installer has contracted (either directly with Owner or indirectly as a subcontractor) to warrant said Work against leaks and faulty or defective materials and workmanship for designated Warranty Period, C. NOW THEREFORE Roofing System Installer hereby warrants, subject to terms and conditions herein set forth, that during Warranty Period, Roofing System Installer will, at Roofing System Installer's own cost and expense, make or cause to be made such repairs to or replacements of said Work as are necessary to correct faulty and defective work and as are necessary to maintain said Work in a watertight condition.

D. This Warranty is made subject to the following terms and conditions:

1. Specifically excluded from this Warranty are damages to Work and other parts of the building, and to building contents, caused by:

a. lightning;

b. peak gust wind speed exceeding 120 mph (m/s)> ;

c. fire;

d. failure of roofing system substrate, including cracking, settlement, excessive deflection, deterioration, and decomposition;

e. faulty construction of parapet walls, copings, chimneys, skylights, vents, equipment supports, and other edge conditions and penetrations of the Work;

f. vapor condensation on bottom of roofing; and

g. activity on roofing by others, including construction contractors, maintenance personnel, other persons, and animals, whether authorized or unauthorized by Owner.

3. When Work has been damaged by any of foregoing causes, Warranty will be null and void until such damage has been repaired by Roofing System Installer and until cost and expense thereof have been paid by Owner or by another responsible party so designated.

4. Roofing System Installer is responsible for damage to Work covered by this Warranty but is not liable for consequential damages to building or building

POLYVINYL-CHLORIDE (PVC) ROOFING 075419 - 20

contents resulting from leaks or faults or defects of Work.

5. During Warranty Period, if Owner allows alteration of Work by anyone other than

Roofing System Installer, including cutting, patching, and maintenance in connection with penetrations, attachment of other work, and positioning of anything on roof, this Warranty will become null and void on date of said alterations, but only to the extent said alterations affect Work covered by this Warranty. If Owner engages Roofing System Installer to perform said alterations, Warranty will not become null and void unless Roofing System Installer, before starting said Work, will have notified Owner in writing, showing reasonable cause for claim, that said alterations would likely damage or deteriorate Work, thereby reasonably justifying a limitation or termination of this Warranty.

6. During Warranty Period, if original use of roof is changed and it becomes used for, but was not originally specified for, a promenade, work deck, spray-cooled surface, flooded basin, or other use or service more severe than originally specified, this Warranty will become null and void on date of said change, but only to the extent said change affects Work covered by this Warranty.

7. Owner will promptly notify Roofing System Installer of observed, known, or suspected leaks, defects, or deterioration and afford reasonable opportunity for Roofing System Installer to inspect Work and to examine evidence of such leaks, defects, or deterioration.

8. This Warranty is recognized to be the only warranty of Roofing System Installer on said Work and will not operate to restrict or cut off Owner from other remedies and resources lawfully available to Owner in cases of roofing failure. Specifically, this Warranty will not operate to relieve Roofing System Installer of responsibility for performance of original Work in accordance with requirements of the Contract Documents, regardless of whether Contract was a contract directly with Owner or a subcontract with Owner's General Contractor.

E. IN WITNESS THEREOF, this instrument has been duly executed this ___________ day of ___________________, ________________.

1. Authorized Signature: _______________________________________.

2. Name: ______________________________________.

3. Title: _______________________________________.

END OF SECTION 075419