VA 07 54 19_CD1.pdf

12-01-18

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SECTION 07 54 19

POLYVINYL-CHLORIDE (PVC) ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Polyvinyl chloride (PVC) sheet roofing adhered to insulated metal roof deck.

1.2 RELATED REQUIREMENTS

A. Preparation of Existing Membrane Roofs and Repair Areas: Section

07 01 50.19, PREPARATION FOR REROOFING.

B. Roof Membrane Color: match existing roof membrane.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American National Standards Institute/Single-Ply Roofing Institute

(ANSI/SPRI):

1. FX-1-01(R2006) - Standard Field Test Procedure for Determining the

Withdrawal Resistance of Roofing Fasteners.

2. RP-4 2013 - Wind Design Standard for Ballasted Single-ply Roofing

Systems.

C. American Society of Civil Engineers/Structural Engineering Institute

(ASCE/SEI):

1. 7-10 - Minimum Design Loads for Buildings and Other Structures.

D. American Society of Heating, Refrigerating and Air-Conditioning

Engineers, Inc. (ASHRAE):

1. 90.1-13 - Energy Standard for Buildings Except Low-Rise Residential

Buildings.

E. ASTM International (ASTM):

1. C67-14 - Sampling and Testing Brick and Structural Clay Tile.

2. C140/C140M-15 - Sampling and Testing Concrete Masonry Units and

Related Units.

3. C578-15b – Specification for Rigid, Cellular Polystyrene Thermal

Insulation.

4. C936/C936M-15 - Solid Concrete Interlocking Paving Units.

5. C1371-15 - Determination of Emittance of Materials Near Room

Temperature Using Portable Emissometers.

6. C1549-09(2014) - Determination of Solar Reflectance Near Ambient

Temperature Using a Portable Solar Reflectometer.

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7. D751-06(2011) – Test Methods for Coated Fabrics.

8. D4263-83(2012) - Indicating Moisture in Concrete by the Plastic

Sheet Method.

9. D4434/D4434M-12 - Poly (Vinyl Chloride) Sheet Roofing.

10. E96/E96M-15 - Water Vapor Transmission of Materials.

11. E408-13 - Total Normal Emittance of Surfaces Using Inspection-Meter

Techniques.

12. E1918-06(2015) - Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field.

13. E1980-11 - Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field.

F. Cool Roof Rating Council (CRRC):

1. 1-15 - Product Rating Program.

G. Florida Department of Business and Professional Regulation (FL):

1. Approved - Product Approval.

H. National Roofing Contractors Association (NRCA):

1. Manual-15 - The NRCA Roofing Manual: Membrane Roofing Systems.

I. U.S. Department of Agriculture (USDA): USDA BioPreferred Catalog.

J. UL LLC (UL):

1. 580-06 - Tests for Uplift Resistance of Roof Assemblies.

2. 1897-15 - Uplift Tests for Roof Covering Systems.

K. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

1. DOC PS 1-09 - Structural Plywood.

2. DOC PS 2-04 - Performance Standard for Wood-Based Structural-Use

Panels.

L. U.S. Environmental Protection Agency (EPA):

1. Energy Star - ENERGY STAR Program Requirements for Roof Products

Version 3.0.

1.4 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting at the Project site minimum 30 days before beginning Work of this section.

1. Required Participants:

a. Contracting Officer's Representative.

b. Engineer.

c. Inspection and Testing Agency.

d. Contractor.

e. Installer.

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f. Manufacturer's field representative.

g. Other installers responsible for adjacent and intersecting work, including roof deck, flashings, roof specialties, roof accessories, utility penetrations, and rooftop curbs and equipment.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Installation schedule.

b. Installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Installation.

f. Terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

j. Pull out test of fasteners.

k. Material storage, including roof deck load limitations.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Areas of existing roofing to be removed.

2. Areas of existing roofing to be patched.

3. Roofing membrane layout.

4. Roofing membrane seaming and joint details.

5. Roof membrane penetration details.

6. Base flashing and termination details.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Minimum fastener pull out resistance.

3. Installation instructions.

4. Warranty.

D. Sustainable Construction Submittals:

1. Solar Reflectance Index (SRI) for roofing membrane.

2. Low Pollutant-Emitting Materials:

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a. Show volatile organic compound types and quantities.

3. Energy Star label for roofing membrane.

E. Samples:

1. Roofing Membrane: 150 mm (6 inch) square.

2. Base Flashing: 150 mm (6 inch) square.

3. Fasteners: Each type.

4. Roofing Membrane Seam: 300 mm (12 inches) square.

F. Certificates: Certify products comply with specifications.

1. Fire and windstorm classification.

2. High wind zone design requirements.

3. Energy performance requirements.

G. Qualifications: Substantiate qualifications comply with specifications.

1. Installer, including supervisors with project experience list.

2. Manufacturer's field representative with project experience list.

H. Field quality control reports.

I. Temporary protection plan. Include list of proposed temporary materials.

J. Operation and Maintenance Data:

1. Maintenance manuals.

1.6 QUALITY ASSURANCE

A. Installer Qualifications:

1. Approved by roofing system manufacturer as installer for roofing system with specified warranty.

2. Regularly installs specified products.

3. Installed specified products with satisfactory service on five similar installations for minimum five years.

a. Project Experience List: Provide contact names and addresses for completed projects.

4. Employs full-time supervisors experienced installing specified system and able to communicate with Contracting Officer's

Representative and installer's personnel.

B. Manufacturer's Field Representative:

1. Manufacturer's full-time technical employee or independent roofing inspector.

2. Individual certified by Roof Consultants Institute as Registered

Roof Observer.

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1.7 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.8 STORAGE AND HANDLING

A. Comply with NRCA Manual storage and handling requirements.

B. Store products indoors in dry, weathertight facility.

C. Store adhesives according to manufacturer's instructions.

D. Protect products from damage during handling and construction operations.

E. Products stored on the roof deck must not cause permanent deck deflection.

1.9 FIELD CONDITIONS

A. Environment:

1. Product Temperature: Minimum 4 degrees C (40 degrees F) and rising before installation.

2. Weather Limitations: Install roofing only during dry current and forecasted weather conditions.

1.10 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

B. Manufacturer's Warranty: Warrant roofing system against material and manufacturing defects and agree to repair any leak caused by a defect in the roofing system materials or workmanship of the installer.

1. Warranty Period: 10 years.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Roofing System: Adhered roofing membrane, base flashing, roof insulation, fasteners, cover boards, and walkway pads.

2.2 SYSTEM PERFORMANCE

A. Design roofing system meeting specified performance:

1. Load Resistance: ASCE/SEI 7; Design criteria as indicated on

Drawings.

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2. Energy Performance:

a. EPA Energy Star Listed for low-slope roof products.

b. Three-Year Aged Performance: Minimum 0.55 solar reflectance tested in according to ASTM C1549 or ASTM E1918, and minimum

0.75 thermal emittance tested in according to ASTM C1371 or

ASTM E408.

1) Where tested aged values are not available:

a) Calculate compliance adjusting initial solar reflectance according to ASHRAE 90.1.

b) Provide roofing system with minimum 64 three-year aged

Solar Reflectance Index calculated according to

ASTM E1980 with 12 W/sq. m/degree K (2.1 BTU/h/sq. ft.)

convection coefficient.

2.3 PRODUCTS - GENERAL

A. Provide roof system components from one manufacturer.

2.4 PVC ROOFING MEMBRANE

A. PVC Sheet: ASTM D4434/D4434M, Type II - reinforced.

1. Backing: Without fabric backing.

2. Thickness: 2.0 mm (80 mils).

3. Color: match existing roof membrane.

B. Additional Properties:

1. Water Vapor Permeance, ASTM E96/E96M: Minimum 8 ng/Pa/s/sq. m

(0.14 perms) (Water Method).

2.5 MEMBRANE ACCESSORY MATERIALS

A. Flashing Sheet: Manufacturer's standard; same material, type, reinforcement, thickness, and color as roofing membrane.

B. Factory Formed Flashings: Inside and outside corners, pipe boots, and other special flashing shapes to minimize field fabrication.

C. Splice Lap Sealant: Manufacturer's standard for exposed lap edge, matching roof membrane color.

D. Bonding Adhesive: Manufacturer's standard, water based, to suit substrates.

E. Termination Bars: Manufacturer's standard, stainless steel or aluminum, 25 mm wide by 3 mm thick (1 inch wide by 1/8 inch thick) factory drilled for fasteners.

F. Pipe Compression Clamp:

1. Stainless steel drawband.

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2. Worm drive clamp device.

G. Fasteners: Manufacturer's standard coated steel with metal or plastic plates to suit application.

H. Protection Sheet: UV-resistant fabric and weight recommended by roofing manufacturer for installation under pavers.

I. Miscellaneous Accessories: Provide other accessories required by manufacturer for complete, watertight installation.

2.6 ACCESSORIES

A. Temporary Protection Materials:

1. Expanded Polystyrene (EPS) Insulation: ASTM C578.

2. Plywood: NIST DOC PS 1, Grade CD Exposure 1.

3. Oriented Strand Board (OSB): NIST DOC PS 2, Exposure 1.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine and verify substrate suitability for product installation with roofing installer and roofing inspector present.

1. Verify roof penetrations are complete, and secured against movement.

2. Verify roof deck is adequately secured to resist wind uplift.

3. Verify roof deck is clean, dry, and in-plane ready to receive roofing system.

B. Correct unsatisfactory conditions before beginning roofing work.

3.2 PREPARATION

A. Complete roof deck construction before beginning roofing work:

1. Where new mechanical equipment is to be installed at locations that are currently covered by roof membrane, remove only as much existing roof membrane and underlying cover board and roof insulation necessary to install the new equipment.

2. Thoroughly clean existing adjacent roof membrane onto which the new roof membrane will adhere.

3. Install curbs, blocking, edge strips, nailers, and other components to which roofing membrane and base flashing are attached.

4. Coordinate roofing membrane installation with flashing work and roof insulation work so insulation and flashing are installed concurrently to permit continuous roofing operations.

5. Document installation of related materials to be concealed before installing roofing work.

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B. Dry out wet substrate surfaces including roof deck flutes. Apply materials to dry substrates, only.

C. Broom clean roof decks. Remove dust, dirt and debris.

D. Remove projections capable of damaging roofing materials.

E. Existing Membrane Roofs and Repair Areas:

1. Comply with Section 07 01 50.19 PREPARATION FOR REROOFING.

3.3 TEMPORARY PROTECTION

A. Install temporary protection at end of each day's work, when work is halted indefinitely, and when precipitation is imminent. Comply with approved temporary protection plan.

B. Install temporary cap flashing over top of base flashings where permanent flashings are not in place to protect against water intrusion into roofing system. Securely anchor in place to prevent blow off and damage by construction activities.

C. Temporarily seal exposed insulation surfaces within roofing membrane.

1. Apply temporary seal and water cut off by extending roofing membrane beyond insulation and securely embedding edge of the roofing membrane in 6 mm (1/4 inch) thick by 50 mm (2 inches) wide strip of temporary closure sealant. Weight roofing membrane edge with sandbags, to prevent displacement; space sandbags maximum 2400 mm

(8 feet) on center.

2. Direct water away from work. Provide drainage, preventing water accumulation.

3. Check daily to ensure temporary seal remains watertight. Reseal open areas and weight down.

D. Before the work resumes, cut off and discard portions of roof membrane in contact with temporary seal.

1. Cut minimum 150 mm (6 inches) back from sealed edges and surfaces.

E. Remove sandbags and store for reuse.

3.4 INSTALLATION, GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

B. Comply with NRCA Manual installation requirements.

C. Comply with UL 580 or UL 1897 for uplift resistance.

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D. Do not allow membrane and flashing to contact surfaces contaminated with asphalt, coal tar, oil, grease, or other substances incompatible with PVC.

3.5 ROOFING INSTALLATION

A. Install membrane perpendicular to long dimension of insulation boards.

B. Begin membrane installation at roof low point and work towards high point. Lap membrane shingled in water flow direction.

C. Position membrane free of buckles and wrinkles.

D. Roll membrane out; inspect for defects as membrane is unrolled. Remove defective areas.

1. Allow 30 minutes for membrane to relax before proceeding.

2. Lap edges and ends minimum 50 mm (2 inches).

3. Heat weld or solvent weld laps. Apply pressure to develop full adhesion with minimum seam strength according to ASTM D4434/D4434M.

4. Check seams to ensure continuous adhesion and correct defects.

5. Finish seam edges beveled bead of sealant.

6. Finish seams same day as membrane is installed.

7. Anchor membrane perimeter to roof deck and parapet wall as indicated on drawings.

E. Adhered System Installation:

1. Apply bonding adhesive in quantities required by roofing membrane manufacturer.

2. Fold sheet back on itself after rolling out and coat bottom side of roofing membrane and top substrate with adhesive. Do not coat the lap joint area.

3. After adhesive has set according to adhesive manufacturer's instructions, roll roofing membrane into adhesive minimizing voids and wrinkles.

4. Repeat for other half of sheet.

5. Cut voids and wrinkles to lay flat. Clean and patch cut area.

3.6 FLASHING INSTALLATION

A. Install flashings on same day as roofing membrane is installed. When flashing cannot be completely installed in one day, complete installation until flashing is watertight and provide temporary covers or seals.

B. Installing Base Flashing and Pipe Flashing:

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1. Install flashing sheet to pipes, walls and curbs to minimum 200 mm

(8 inches) height above roof surfaces and extend roofing manufacturer's standard lap dimension onto roofing membranes.

a. Adhere flashing with bonding adhesive.

b. Form inside and outside corners of flashing sheet according to

NRCA Manual.

c. Form pipe flashing according to NRCA Manual.

d. Lap ends roofing manufacturer's standard dimension.

e. Weld flashing sheets together, and weld flashing sheets to roofing membranes. Finish exposed edges with lap sealant.

2. Anchor top of flashing to walls and curbs with fasteners spaced maximum 150 mm (6 inches) on center. Use surface mounted fastening strip on ducts. Use pipe clamps on pipes or other round penetrations.

3. Apply sealant to top edge of flashing.

C. Repairs to Membrane and Flashings:

1. Remove sections of roofing membrane and flashing sheets that are creased, wrinkled, or fishmouthed.

2. Cover removed areas, cuts and damaged areas with patch extending

100 mm (4 inches) beyond damaged, cut, or removed area. Weld patch to roofing membrane or flashing sheet. Finish edge of lap with lap sealant.

3.7 FLEXIBLE WALKWAYS

A. Walkway Pad: PVC walkway pad with slip resistant surface and molded channels on the underside for water drainage.

3.8 FIELD QUALITY CONTROL

A. Field Tests: Performed by testing laboratory specified in Section

01 45 29, TESTING LABORATORY SERVICES.

1. Fastener Pull Out Tests: ANSI/SPRI FX-1; one test for every

230 sq. m (2,500 sq. ft.) of deck. Perform tests for each combination of fastener type and roof deck type before installing roof insulation.

a. Test at locations selected by Contracting Officer's

Representative.

b. Do not proceed with roofing work when pull out resistance is less than manufacturer's required resistance.

c. Test Results:

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1) Repeat tests using different fastener type or use additional fasteners achieve pull out resistance required to meet specified wind uplift performance.

2) Patch cementitious deck to repair areas of fastener tests holes.

2. Examine and probe roofing membrane and flashing seams in presence of

Contracting Officer's Representative and Manufacturer's field representative.

3. Probe seams to detect marginal welds, voids, skips, and fishmouths.

4. Cut 100 mm (4 inch) wide by 300 mm (12 inch) long samples through seams where directed by Contracting Officer's Representative.

5. Cut one sample for every 450 m (1500 feet) of seams.

6. Cut samples perpendicular to seams.

7. Failure of samples to pass ASTM D751 test will be cause for rejection of work.

8. Repair areas where samples are taken and where marginal bond, voids, and skips occur.

9. Repair fishmouths and wrinkles by cutting to lay flat. Install patch over cut area extending 100 mm (4 inches) beyond cut.

B. Manufacturer Services:

1. Inspect initial installation, installation in progress, and completed work.

2. Issue supplemental installation instructions necessitated by field conditions.

3. Prepare and submit inspection reports.

4. Certify completed installation complies with manufacturer's instructions and warranty requirements.

3.9 CLEANING

A. Remove excess adhesive before adhesive sets.

B. Clean exposed roofing surfaces. Remove contaminants and stains to comply with specified solar reflectance performance.

3.10 PROTECTION

A. Protect roofing system from traffic and construction operations.

1. Protect roofing system when used for subsequent work platform, materials storage, or staging.

2. Distribute scaffolding loads to exert maximum 50 percent roofing system materials compressive strength.

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B. Loose lay temporary insulation board overlaid with plywood or OSB.

1. Weight boards to secure against wind uplift.

C. Remove protection when directed by Contacting Officer's Representative.

D. Repair damage.

- - E N D - -

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

3. Energy Star label for roofing membrane.

4. Employs full-time supervisors experienced installing specified system and able to communicate with Contracting Officer's Representative and installer's personnel.

B. Correct unsatisfactory conditions before beginning roofing work.

E. Remove sandbags and store for reuse.