Section 075400 - Thermoplastic Membrane Roofing

Johns Manville Specification 3GIT-P6 / Insert Project Name

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SECTION 075419 – Polyvinyl-Chloride Roofing

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1  RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2  SUMMARY

  1. This Section includes the following:

Adjust list below to suit Project.

  1. Hybrid built-up and PVC fleece-backed membrane roofing system.
  2. Cover board.
  3. Roof insulation.
  4. Vapor retarder.
  5. Related Sections include the following:

Edit as required.

  1. Division05 Section "Steel Decking" for furnishing acoustical deck rib insulation.
  2. Division06 Section "[Rough Carpentry] [Miscellaneous Rough Carpentry]" for wood nailers, curbs, and blocking [and for wood-based, structural-use roof deck panels].
  3. Division07 Section "Thermal Insulation" for insulation beneath the roof deck.
  4. Division07 Section "Sheet Metal Flashing and Trim" for metal roof penetration flashings, flashings, and counterflashings.
  5. Division07 Section "Manufactured Roof Expansion Joints."
  6. Division07 Section "Joint Sealants."
  7. Division22 Section "Storm Drainage Piping Specialties" for roof drains.

Eliminate unit prices unless required.

  1. Unit Prices: Refer to Division01 Section "Unit Prices" for description of Work in this Section affected by unit prices.

Verify no alternates in Contract. If alternates found alert Contractor and reference appropriate Division01 Section.

1.3  DEFINITIONS

  1. Roofing Terminology: Refer to ASTMD1079 “Terminology Relating to Roofing and Waterproofing”; glossary of NRCA's "The NRCA Roofing and Waterproofing Manual"; and the Roof Consultants Institute “Glossary of Roofing Terms” for definition of terms related to roofing work in this Section.
  2. Sheet Metal Terminology and Techniques: SMACNA Architectural Sheet Metal Manual.

1.4  PERFORMANCE REQUIREMENTS

  1. General: Provide installed roofing membrane and base flashings that remain watertight; do not permit the passage of water; and resist specified uplift pressures, thermally induced movement, and exposure to weather without failure.
  2. Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by roofing membrane manufacturer based on testing and field experience.
  3. Jobsite Safety: Execute all operations and provide a safe work environment in accordance to OSHA standards and regulations. This requirement applies to all contractor personnel, associated subcontractors, workers in other trades, and jobsite visitors.
  4. Follow all industry fire prevention guidelines for storage of materials, staging areas, roof access, and application means and methods.
  5. Any applicable local fire codes supersede industry guidelines.

Retain below for projects designed per ASCE 7. Remove if Project is FMG (Factory Mutual Global) insured.

  1. Roofing System Design: Provide a membrane roofing system that is identical to systems that have been successfully tested by a qualified testing and inspecting agency to resist uplift pressure calculated according to ASCE7.
  2. Corner Uplift Pressure: <Insert number> lbf/sq. ft. (kPa/sq. m).
  3. Perimeter Uplift Pressure: <Insert number> lbf/sq. ft. (kPa/sq. m).
  4. Field-of-Roof Uplift Pressure: <Insert number> lbf/sq. ft. (kPa/sq. m).

Retain paragraph and subparagraphs below if Project is FMG (Factory Mutual Global) insured or if using FMG requirements as quality standard.

Insert RoofNav# below. If spec is “open”, retain FM classification for wind and hail requirements and choose applicable. Contact Johns Manville for additional wind classification ratings, RoofNav numbers and special guarantee riders.

  1. Provide system complying to RoofNav #:
  2. Fire/Windstorm Classification: Class1A-[60] [75] [90] [105] [120] <Insert number>.
  3. Hail Resistance: [MH] [SH].

1.5  SUBMITTALS

  1. Product Data: For each type of product indicated.
  2. Shop Drawings: For roofing system. Include plans, elevations, sections, details, and attachments to other Work.

Adjust list below to suit Project.

  1. Base flashings and membrane terminations.
  2. Tapered insulation, including slopes.
  3. Insulation fastening patterns.
  4. Sheet layout with perimeter and corner defined.
  5. Samples for Verification: For the following products:

Adjust list below to suit Project.

  1. Manufacturer’s standard sample size of sheet roofing, of color specified, including T-shaped side and end lap seam.
  2. Manufacturer’s standard sample size of [base-ply sheet] [smooth-surfaced roofing membrane sheet] [flashing backer sheet].
  3. Manufacturer’s standard sample size of walkway pads or rolls.
  4. Manufacturer’s standard sample size of cover board.
  5. Manufacturer’s standard sample size of roof insulation.
  6. Manufacturer’s standard sample size of metal termination bars.
  7. Manufacturer’s standard sample size of battens.
  8. Manufacturer’s standard sample size of vapor retarder.
  9. Six insulation fasteners of each type, length, and finish.
  10. Six roof cover fasteners of each type, length, and finish.
  11. Six fasteners or each type, length and finish used for complete roofing installation.
  12. Installer Certificates: Signed by roofing system manufacturer certifying that Installer is approved, authorized, or licensed by manufacturer to install roofing system.
  13. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with requirements specified in "Performance Requirements" Article.
  14. Submit evidence of meeting performance requirements.

Coordinate first paragraph below with qualification requirements in Division01 Section "Quality Requirements" and as supplemented in "Quality Assurance" Article.

  1. Qualification Data: For Installer and manufacturer.

Delete below when packaged asphalt will be used.

  1. Indicate that bulk roofing asphalt materials delivered to Project comply with requirements. Include quantity and statistical and descriptive data for each product. Submit certificate with each load before it is used.

Delete below when packaged asphalt will be used.

  1. Include continuous log showing time and temperature for each load of bulk asphalt, indicating date obtained from manufacturer, where held, and how transported before final heating and application on roof.
  2. Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer and witnessed by a qualified testing agency, for components of roofing system.

Insert specific model code organization in first paragraph below or revise if report must be from another source.

  1. Research/Evaluation Reports: For components of membrane roofing system.
  2. Maintenance Data: For roofing system to include in maintenance manuals.
  3. Warranties: Special warranties specified in this Section.

1.6  QUALITY ASSURANCE

  1. 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 manufacturer's warranty.
  2. Manufacturer Qualifications: A qualified manufacturer that has [UL listing] [FMG approval] for membrane roofing system identical to that used for this Project.

Retain paragraph below if testing agency desired and Contractor selects testing agency.

  1. Testing Agency Qualifications: An independent testing agency with the experience and capability to conduct the testing indicated, as documented according to ASTME548.
  2. Test Reports:
  3. Roof drain and leader test or submit plumber’s verification.
  4. Core cut (if requested).

Retain moisture survey subparagraphs below for re-cover applications.

  1. Moisture Survery:

1.  Submit prior to installation, results of a non-destructive moisture test of roof system completed by approved third party. Utilizing one of the approved methods:

  1. Infrared Thermography
  2. Nuclear Backscatter

Retain first paragraph below if required to meet provisions of special manufacturer's warranty. Consult manufacturer's literature for requirements because they vary.

  1. Source Limitations: Obtain all components from single source roofing manufacturer.
  2. Fire-Test-Response Characteristics: Provide membrane roofing materials with the fire-test-response characteristics indicated as determined by testing identical products per test method below by UL, FMG, or another testing and inspecting agency acceptable to authorities having jurisdiction. Materials shall be identified with appropriate markings of applicable testing and inspecting agency.

If UL required, edit UL Fire requirements below.

  1. Exterior Fire-Test Exposure: Class [A] [B] [C]; ASTME108, for application and roof slopes indicated.
  2. Fire-Resistance Ratings: ASTME119, for fire-resistance-rated roof assemblies of which roofing system is a part.
  3. Preliminary Roofing Conference: Before starting roof deck construction, conduct conference at Project site. Comply with requirements for preinstallation conferences in Division01 Section "Project Management and Coordination." Review methods and procedures related to roof deck construction and roofing system including, but not limited to, the following:

Delete subparagraphs below not required. If retaining, revise to include Project-specific requirements. Insert additional requirements to suit Project.

  1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative, deck Installer, and installers whose work interfaces with or affects roofing including installers of roof accessories and roof-mounted equipment.
  2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.
  3. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.
  4. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.
  5. Review structural loading limitations of roof deck during and after roofing.
  6. Require that all complimentary trades be present at conference. Including, but not limited to; electrical, plumbing, HVAC, and framing contractors.
  7. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect 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.

Preinstallation conference below is recommended with or without preliminary roofing conference above.

  1. Preinstallation Conference: Conduct conference at Project site. Comply with requirements in Division01 Section "Project Management and Coordination." Review methods and procedures related to roofing system including, but not limited to, the following:

Delete subparagraphs below not required. If retaining, revise to include Project-specific requirements. Insert additional requirements to suit Project.

  1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative, deck Installer, and installers whose work interfaces with or affects roofing including installers of roof accessories and roof-mounted equipment.
  2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.
  3. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.
  4. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.
  5. Review structural loading limitations of roof deck during and after roofing.
  6. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect roofing system.
  7. Review governing regulations and requirements for insurance and certificates if applicable.
  8. Review temporary protection requirements for roofing system during and after installation.
  9. Review roof observation and repair procedures after roofing installation.

1.7  DELIVERY, STORAGE, AND HANDLING

  1. Deliver roofing materials to Project site in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, and directions for storing and mixing with other components.
  2. Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing system manufacturer. Protect stored liquid material from direct sunlight.
  3. Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.
  4. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Store in a dry location. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.
  5. Handle and store roofing materials and place equipment in a manner to avoid permanent deflection of deck.

1.8  PROJECT CONDITIONS

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

1.9  guarantee

  1. Provide manufacturer's system guarantee equal to Johns Manville's Peak Advantage No Dollar Limit Roofing System Guarantee.

Retain options in subparagraph below based on those used on Project. Verify availability of manufacturer's total-system warranty and components included.

  1. Single-Source special warranty includes roofing membrane, base flashings, roofing membrane accessories, roof insulation, fasteners, [cover board], [substrate board], [vapor retarder], [walkway products], [manufacturer’s expansion joints], [manufacturer’s edge metal products], and other single-source components of roofing system marketed by the manufacturer.

Insert correct guarantee term. Contact Johns Manville Technical to verify.

  1. Warranty Period: [10] [15] [20] years from date of Substantial Completion.
  2. Installer’s Guarantee: Submit roofing Installer's warranty, on warranty form at end of this Section, signed by Installer, covering Work of this Section, including all components of roofing system such as roofing membrane, base flashing, roof insulation, fasteners, cover boards, substrate boards, vapor retarders, roof pavers, and walkway products, for the following warranty period:
  3. Warranty Period: Two years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1  MANUFACTURER

  1. Basis of Design: Johns Manville Roofing Systems

2.2  Polyvinyl-Chloride Roofing

  1. PVC Sheet: ASTMD4434, TypeIII, fabric reinforced and fleece backed that contains KEE (Elvaloy) to reduce plasticizer migration. If the membrane does not contain KEE, then a post installation coating is required to mitigate plasticizer migration. Product: JM PVC Fleece Backed

Select one thickness in subparagraph below. Not all guarantee terms are available for all products, coordinate with Johns Manville Technical.

  1. Thickness: 88 mils (2.2 mm), nominal.

2.3  AUXILIARY MATERIALS

  1. General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with membrane roofing.

Select VOC compliant or NO VOC application below. Coordinate accessories selection with membrane and application.

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