SFSU Revised Spec 075400.pdf

INDIAN HEALTH SERVICE BWS 1818.017

ABQ AREA ROOFING IHS AQ22SF001

CONSTRUCTION DOCUMENTS SANTA FE INDIAN HEALTH CENTER

REVISED 4/30/25

POLYVINYL CHLORIDE ROOFING 075400 - 1

SECTION 075400 – POLYVINYL CHLORIDE (PVC) ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Adhered PVC membrane roofing system – white.

2. Roof Layup:

Santa Fe – structural metal deck, 4” polyisocyanurate board and ½” underlayment/cover board mechanically fastened with adhered single-ply PVC roofing

1.2 DEFINITIONS

A. Roofing Terminology: See ASTM D 1079 and glossary in "NRCA Roofing and Waterproofing Manual" for definition of terms related to roofing work in this Section.

1.3 PERFORMANCE REQUIREMENTS:

A. General Performance: Installed membrane roofing and base flashings withstanding specified uplift pressures, thermally induced movement, and exposure to weather without failure from defective manufacture, fabrication, installation, or other defects in construction. Membrane roofing and base flashings shall remain watertight.

B. Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by membrane roofing manufacturer based on testing and field experience.

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

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

2. Hail Resistance: SH.

1.4 SUBMITTALS

A. Product Data and Installation Instructions: For each type of product indicated.

FOR INFORMATIONAL PURPOSES ONLY

CONSTRUCTION DOCUMENTS SANTA FE INDIAN HEALTH CENTER

REVISED 4/30/25

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1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For qualified installer and manufacturer.

B. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with Specifications.

C. Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer and witnessed by a qualified testing agency, for components of membrane roofing system.

D. Research/Evaluation Reports: For components of membrane roofing system, from ICC-ES.

E. Warranties: Sample of special warranties.

1.6 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing system to include in maintenance manuals.

1.7 QUALITY ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer that is UL listed and FM approved for membrane roofing system identical to that used for this Project.

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

C. Source Limitations: Obtain components including roof insulation and fasteners for membrane roofing system from same manufacturer as membrane roofing or approved by membrane roofing manufacturer.

D. Exterior Fire-Test Exposure: ASTM E 108, Class A for application and roof slopes indicated, as determined by testing identical membrane roofing materials by a qualified testing agency.

Identify materials with appropriate markings of applicable testing agency.

E. Fire-Resistance Ratings: Where indicated, provide fire-resistance-rated roof assemblies identical to those of assemblies tested for fire resistance per ASTM E 119 by a qualified testing agency.

Identify products with appropriate markings of applicable testing agency.

F. Preinstallation Roofing Conference: Conduct conference at Project site.

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

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

3. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.

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

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

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

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

8. Review roof repair procedures after roofing installation.

9. Coordinate with Owner for shutdown of air handlers in immediate area of adhesive, liquid flashing and other material use that emits odors.

1.8 DELIVERY, STORAGE, AND HANDLING

A. 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, approval or listing agency markings, and directions for storing and mixing with other components.

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. Protect stored liquid material from direct sunlight.

1. 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. Store in a dry location. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.

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

1.9 PROJECT CONDITIONS

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

1.10 WARRANTY

A. Special Warranty: Manufacturer's standard or customized form, without monetary limitation, in which manufacturer agrees to repair or replace components of membrane roofing system that fail in materials or workmanship within specified warranty period.

1. Special warranty includes membrane roofing, base flashings, roof insulation, fasteners, roofing accessories and other components of membrane roofing system.

2. Warranty Period: Twenty (20) years from date of Substantial Completion.

B. Special Project Warranty: Submit roofing installer's warranty, signed by installer, covering Work of this Section, including all components of membrane roofing system such as membrane roofing, base flashing, roof insulation, fasteners, vapor retarders, and walkway products, for the following warranty period:

1. Two years from date of Substantial Completion.

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PART 2 - PRODUCTS

2.1 PVC MEMBRANE ROOFING

1. Subject to compliance with Specifications, products from these manufacturers may be submitted:

a. Carlisle Syn Tec (carlisle-syntec.com).

b. GAF (gaf.com).

c. Johns Manville (specjm.com).

d. Sika Sarnafil (usa.sarnafil.sike.com).

e. Duro-last (duro-lastroofing.com)

2.2 ROOF MEMBRANE

A. Special formulated, permanent, thermoplastic alloy, bonded to high tenacity, low shrinkage weft inserted woven fabric.

B. Typical roofing shall be a fully adhered installation, standard polyvinyl chloride.

Thickness: 60 mils.

2.3 MINIMUM PERFORMANCE REQUIREMENTS

Physical Property Test Method Used Specification Requirements

Typical Color White

Thickness Minimum over scrim ASTM D4434 .027 inch.

0.016 min.

Tear Strength, Toung Method ASTM D751 100 x 130 lbf.

90 min.

Breaking Strength ASTM D751 330 x 300 lbf.

275 min.

Elongation ASTM D751 30% x 35% 25 min.

Linear Dimensional Change ASTM D1204 0.4% +/-0.5 max

Low Temperature Bend ASTM D2136, 1/8” mandrel No cracks, - 40º C

Dynamic Impact (Puncturing) Fed. Std. 1013, Method 2031 380 lbs.

Water Absorption Resistance ASTM D570 2.0 +/-3.0 max.

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Xenon-Arc Resistance ASTM G155, 10000 Hrs. PASS No cracks, crazing, or blistering

2.4 MATERIALS

A. Membrane-Related Materials:

1. All membrane components, including pipe and curb flashings must be factory prefabricated from the same fabric reinforced material used for roofing membrane.

2. Termination Sealant: Compatible with materials to which membrane is to be bonded, conforming to Federal Specifications TT-598 and TT-S-00230C as furnished by the membrane manufacturer.

B. Nailers and Blocking:

1. Water Cut-Off Mastic: Compatible with membrane and furnished by membrane manufacturer.

2. Fasteners: Compatible with roof deck. Fasteners shall be coated and must pass 30 cycles in the Kesternich Cabinet, DIN #50018-1 liter. The FM approved fastener is inserted through the hole in the distribution plate and secured to roof deck.

3. Breather Vents: Two-way vents with factory-attached skirt. Provide one per 1,000 square feet of roof deck and in accordance with membrane manufacturer’s specifications.

4. Terminations/Edge Details: Manufactured from rigid exterior vinyl with slotted holes for securement.

5. Nailers and Wood Blocking: Pressure treated, S4S 1500 fc construction grade Douglas fir conforming to Standard 15 grading and dressing rules of West Coast Lumber Inspection Bureau, or other species of wood of equal strength. All lumber grades marked at mill.

C. Insulation: Polyisocyanurate foam board insulation, ASTM C129 Type II, Class 1, Grade 2 (20 psi compressive strength), with non-asphaltic organic felt facers. Equal Atlas AC Foam II.

Thickness: Santa Fe – 4”

Tapered Insulation: Extents and slope as required and indicated on roof drainage plan.

Underlayment/Cover Board: Type VII, glass mat gypsum board, ½” inch thick.

National Guard – Densdeck Roof Board

USG – Securock Glass-Mat Roof Board

2.5 AUXILIARY MEMBRANE ROOFING MATERIALS

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

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

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C. Walkways: manufacturer’s 110-mil walkway roll material, slip resistant, heat welded to membrane.

D. Pipe, conduit, and equipment supports: MIFAB C-PORT Models C5, C6, and AP. Sizes and spacing as required.

PART 3 - EXECUTION

3.1 EXAMINATION

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

1. Verify that roof openings and penetrations are in place and curbs are set and braced and that 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 thickness of insulation.

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

3.2 PREPARATION

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

B. 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.

C. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system at the end of the workday or when rain is forecast.

Remove and discard temporary seals before beginning work on adjoining roofing.

D. Provide blocking/terminations of pressure treated lumber thickness of insulation at all perimeters and terminations.

3.3 INSULATION AND UNDERLAYMENT/COVER BOARD INSTALLATION

A. Coordinate installing membrane roofing system components so insulation and underlayment/cover board are not exposed to precipitation or left exposed at the end of the workday.

B. Comply with membrane roofing system and insulation manufacturer's written instructions for installing underlayment.

C. Install with insulation with long joints in a continuous straight line with end joints staggered between rows, abutting edges and ends between boards. Install cover board over insulation staggering all joints from those in the insulation.

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1. Cut and fit 1/4 inch of nailers, projections, and penetrations.

2. At mansard install cover board directly to the metal deck.

D. Mechanical Fastening: Secure each layer to deck using mechanical fasteners specifically designed and sized for fastening specified board-type roof insulation and underlayment to deck type.

1. Fasten according to requirements in FM Approvals' "RoofNav" for specified Windstorm Resistance Classification.

2. Fasten to resist uplift pressure at corners, perimeter, and field of roof.

3.4 ADHERED MEMBRANE ROOFING INSTALLATION

A. Adhere membrane roofing over area to receive roofing and install according to membrane roofing system manufacturer's written instructions.

1. Install sheet according to ASTM D 5036.

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

C. Accurately align membrane roofing and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.

D. Bonding Adhesive: Apply to substrate and underside of membrane roofing at rate required by manufacturer and allow to partially dry before installing membrane roofing. Do not apply to splice area of membrane roofing.

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

F. Apply membrane roofing with side laps shingled with slope of roof deck.

G. Seams: Clean seam areas, overlap membrane roofing, and hot-air weld side and end laps of membrane roofing and sheet flashings according to manufacturer's written instructions to ensure a watertight seam installation.

1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of sheet membrane.

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

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

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

I. Install membrane roofing and auxiliary materials to tie into existing roofing to maintain weathertightness of transition, POLYVINYL CHLORIDE ROOFING 075400 - 8

3.5 BASE FLASHING INSTALLATION

A. Install sheet flashings and preformed flashing accessories and adhere to substrates according to membrane roofing system manufacturer's written instructions.

B. Apply bonding adhesive to substrate and underside of sheet flashing 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 with cured or uncured sheet flashing.

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

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

F. Walkway Protection: Install at indicated locations, welded to membrane.

3.6 PROTECTING AND CLEANING

A. Protect membrane roofing system from damage and wear during remainder of construction period. When remaining construction will not affect or endanger roofing, inspect roofing 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 membrane roofing system that does not comply with requirements; repair substrates; and repair or reinstall membrane roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

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

END OF SECTION 075400