6-Re-roof specifications (2).pdf

SECTION 074113 - METAL ROOF AND SOFFIT PANELS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Standing-seam metal roof panels.

2. Metal soffit panels.

3. Underlayment materials.

B. Related Sections:

1. Section 053100 "Steel Decking" for steel roof deck supporting metal roof panels.

2. Section 054000 "Cold-Formed Metal Framing" for cold-formed metal framing supporting metal roof panels.

3. Section 061600 "Sheathing".

4. Section 072100 "Thermal Insulation" for insulation to cover roof.

5. Section 076200 "Sheet Metal Flashing and Trim" for field-formed copings, flashings, roof drainage systems, and other sheet metal work not part of metal roof panel assemblies.

6. Section 077253 "Snow Guards" for attachment to metal roof panels.

7. Section 079200 "Joint Sealants" for field-applied sealants not otherwise specified in this

Section.

1.3 PERFORMANCE REQUIREMENTS

A. General Performance: Metal panels shall comply with performance requirements without failure due to defective manufacture, fabrication, installation, or other defects in construction.

B. Air Infiltration: Air leakage through assembly of not more than 0.016 cfm/sq. ft. (0.3 L/s per

sq. m) of roof area when tested according to ASTM E 1680 at the following test-pressure difference:

1. Test-Pressure Difference: Negative 1.57 lb./sq. ft. (75 Pa).

C. Water Penetration: No water penetration when tested according to ASTM E 1646 at the following test-pressure difference:

1. Test-Pressure Difference: 20 percent of positive design wind pressure, but not less than

6.24 lb. /sq. ft. (300 Pa) and not more than 12.0 lb. /sq. ft. (575 Pa).

2. No leakage.

D. Wind-Uplift Resistance: Provide metal roof panel assemblies that comply with UL 580 for wind-uplift-resistance class indicated.

1. Uplift Rating: UL 90.

1.4 SUBMITTALS

A. Product Data: For each type of product indicated. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each type of roof panel and accessory.

B. Shop Drawings: Show fabrication and installation layouts of metal roof and wall panels; details of edge conditions, side-seam and end lap joints, panel profiles, corners, anchorages, trim, flashings, closures, and accessories; and special details. Distinguish between factory- and field-assembled work.

C. Samples for Verification: For each type of exposed finish required, prepared on Samples of size indicated below:

1. Metal Panels: 12 inches (300 mm) long by actual panel width of either 12" or 16".

Include fasteners, clips, closures, and other metal roof panel accessories.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: An employer of workers trained and approved by manufacturer.

B. Testing Agency Qualifications: Qualified according to ASTM E 329 for testing indicated.

C. Source Limitations: Obtain each type of metal panels from single source from single manufacturer.

D. Surface-Burning Characteristics: Provide metal panels with the following surface-burning characteristics as determined by testing identical products according to ASTM E 84 by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

1. Flame-Spread Index: 25 or less.

2. Smoke-Developed Index: 450 or less.

E. Mockups: Build adequate mockup to provide visual display of me t a l soffit panel. Mockup to be a minimum of three soffit panels.

1. Mockup to be approved by Owner and Architect.

F. Pre-Installation Conference: Conduct conference at project site.

1. Prior to fabrication and installation of metal soffit panels, a pre-installation meeting will be held with Owner, Architect, Contractor, and Installer for review of substrate framing and flatness.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver components, sheets, metal panels, and other manufactured items so as not to be damaged or deformed. Package metal panels for protection during transportation and handling.

B. Unload, store, and erect metal panels in a manner to prevent bending, warping, twisting, and surface damage.

C. Stack metal panels on platforms or pallets, covered with suitable weather tight and ventilated covering. Store metal roof panels to ensure dryness. Do not store metal panels in contact with other materials that might cause staining, denting, or other surface damage.

D. Protect strippable protective covering on metal panels from exposure to sunlight and high humidity, except to extent necessary for period of metal panel installation.

1.7 PROJECT CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit metal panel work to be performed according to manufacturer's written instructions and warranty requirements.

B. Field Measurements: Verify actual dimensions of construction contiguous with metal panels by field measurements before fabrication.

1.8 COORDINATION

A. Coordinate sizes and locations of roof curbs, equipment supports, and roof penetrations with actual equipment provided.

1.9 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace metal panel assemblies that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including rupturing, cracking, or puncturing.

b. Deterioration o f m e t a l s , metal finishes, and other materials beyond normal weathering.

2. Warranty Period: Twenty-five (25) years from date of Substantial Completion.

B. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace metal panels that show evidence of deterioration of factory-applied finishes within specified warranty period.

1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:

a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.

b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.

c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Finish Warranty Period: Twenty-five (25) years from date of Substantial Completion.

C. Special Weather tightness Warranty for Standing-Seam Metal Roof Panels: Manufacturer's standard form in which manufacturer agrees to repair or replace standing-seam metal roof panel assemblies that fail to remain weather tight, including leaks, within specified warranty period.

1. Warranty Period: Twenty-five (25) years from date of substantial completion.

PART 2 - PRODUCTS

2.1 PANEL MATERIALS

A. Metallic-Coated Steel Sheet: Provide G - 9 0 g a l v a n i z e d steel sheet or equivalent, according to ASTM A 792/A 792M, Class AZ50 ( Class AZM150) c o a t i n g designation, Grade 40 (Grade 275); pre-painted Kynar to comply with ASTM A 755/A 755M.

B. Panel Sealants:

1. Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic, non-staining tape as required by metal panel manufacturer.

2. Joint Sealant: ASTM C 920; elastomeric polyurethane, of type, grade, class, and use classifications required to seal joints in metal panels and remain weather tight; and as recommended in writing by metal roof panel manufacturer.

3. Butyl-Rubber-Based, Solvent-Release Sealant: ASTM C 1311.

2.2 STANDING-SEAM METAL ROOF PANELS

A. General: Provide field-formed metal roof panels designed to be installed by lapping and interconnecting raised side edges of adjacent panels with joint type indicated and mechanically attaching panels to supports using concealed clips ins ide laps. Include clips, cleats, pressure plates, and accessories required for weather tight installation.

B. Vertical-Rib, Seamed-Joint, Standing-Seam Metal Roof Panels: Formed with vertical ribs at panel edges and flat pan between ribs; designed for sequential installation by mechanically attaching panels using concealed clips and fasteners located under one side of panels and engaging opposite edge of adjacent panels, and mechanically seaming panels together.

1. Standing Seam Metal Roof Panel: Panel shall be 1-1/2" high, 16" wide (nominal), mechanically fastened system by one of the following approved manufacturers:

a. Berridge.

b. Fabral.

c. Firestone.

d. MBCI.

2. Material: G-90 Galvanized steel or equivalent, 24 gauge.

a. Exterior Finish: Kynar.

3. Surface: Determined by owner and architect.

4. Insulation: Rigid polyisocyanurate with black mat facers 4' x 8' installed in two layers to meet desired R-value of 30.

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

2.3 METAL SOFFIT PANELS

A. General: Provide field fabricated metal soffit panels designed to be installed by lapping and interconnecting side edges of adjacent panels and mechanically attaching through panel to supports and sheathing using concealed fasteners and J-Channel. Include accessories required for weather tight installation.

1. Flush-Profile Metal Soffit Panels: Solid panels formed with vertical panel edges and flat pan between panel edges; with flush joint between panels. Panel shall be a flush-soffit panel by one of the following approved manufacturers:

a. Berridge.

b. Fabral.

c. Firestone.

d. MBCI.

2. Material: G-90 Galvanized steel or equivalent, 24 gauge.

a. Exterior Finish: Kynar.

3. Surface: Smooth, flat.

4. Panels shall be formed in continuous lengths.

5. Attachment to solid sheathing or framing with screws.

2.4 UNDERLAYMENT MATERIALS

A. Self-Adhering, High-Temperature Sheet: 30 to 40 mils (0.76 to 1.0 mm) thick minimum, consisting of slip-resisting, polyethylene-film top surface laminated to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer.

1. Thermal Stability: Stable after testing at 240 deg F (116 deg C); ASTM D 1970.

2. Low-Temperature Flexibility: Passes after testing at minus 20 deg F (29 deg C); ASTM

D 1970.

3. Products: Provide underlayment product from one of the following manufacturer’s:

a. Carlisle Coatings & Waterproofing Inc., Div. of Carlisle Companies Inc.

b. Firestone Clad-Gard R Metal.

c. Grace Construction Products.

4. Install in strict accordance with manufacturer’s recommendations.

2.5 ACCESSORIES

A. Panel Accessories: Except as indicated as work of another specification section, provide components approved by panel manufacturer and as required for a complete metal panel assembly including trim, copings, corner units, ridge closures, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match material and finish of metal panels unless otherwise indicated.

2.6 FABRICATION

A. Sheet Metal Accessories: Fabricate flashing and trim to comply with recommendations in

SMACNA's "Architectural Sheet Metal Manual" that apply to the design, dimensions, metal, and other characteristics of item indicated.

1. Roll-form Standing Seam Metal Roofing and Soffit Panels on-site, as needed.

2. Form exposed sheet metal accessories that are without excessive oil canning, buckling, and tool marks and that are true to line and levels indicated, with exposed edges folded back to form hems.

3. Metal faces larger than 7” require stiffening bend.

4. End Seams for Aluminum: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with epoxy seam sealer. Rivet joints for additional strength.

5. Sealed Joints: Form non-expansion but movable joints in metal to accommodate elastomeric sealant to comply with SMACNA standards.

6. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces of accessories exposed to view.

7. Fabricate cleats and attachment devices of size and metal thickness recommended by

SMACNA's "Architectural Sheet Metal Manual" or by metal roof panel manufacturer for application, but not less than thickness of metal being secured.

2.7 FINISHES

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Protect mechanical and painted finishes on exposed surfaces (flat stock to form flashing and trim) from damage by applying a strippable, temporary protective covering before shipping.

Coil that is used to form the metal roofing and soffit panels on-site is shipped without strippable film.

C. Appearance of Finished Work: Noticeable variations in same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved

Samples and are assembled or installed to minimize contrast.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances, metal roof panel supports, and other conditions affecting performance of the Work.

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

3.2 PREPARATION

A. Clean substrates of substances harmful to insulation, including removing projections capable of interfering with insulation attachment.

3.3 METAL ROOF PANEL INSTALLATION

A. Standing-Seam Metal Roof Panels: Fasten metal roof panels to supports with concealed clips at each standing-seam joint at location, spacing, and with fasteners recommended by manufacturer.

1. Install per manufacturer’s details and standard installation instructions.

3.4 METAL SOFFIT PANEL INSTALLATION

A. In addition to complying with requirements in "Metal Roof Panel Installation, General" Article, install metal soffit panels to comply with requirements in this article.

B. Metal Soffit Panels: Provide metal soffit panel full width of soffits. Install panel perpendicular to support framing.

1. Flash and seal panels with weather closures where metal soffit panels meet walls and at perimeter of all openings.

3.5 ACCESSORY INSTALLATION

A. General: Install accessories with positive anchorage to building and weather tight mounting and provide for thermal expansion. Coordinate installation with flashings and other components.

1. Install components required for a complete metal panel assembly including trim, copings, ridge closures, seam covers, flashings, sealants, gaskets, fillers, closure strips, and similar items.

3.6 CLEANING

A. Remove temporary protective coverings and strippable films, if any, as metal panels are installed unless otherwise indicated in manufacturers written installation instructions. On completion of metal panel installation, clean finished surfaces as recommended by metal panel manufacturer.

Maintain in a clean condition during construction.

B. Replace metal panels that have been damaged or have deteriorated beyond successful repair by finish touchup or similar minor repair procedures.

END OF SECTION 074113

ASD ELEMENTARY SCHOOL #101 02 JUN 2020 - VCBO 20010

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 1

SECTION 07 5419

POLYVINYL-CHLORIDE (PVC) ROOFING

1. Mechanically fastened PVC membrane roofing system.

a. Electromagnetic induction welding.

2. Roof insulation

3. Walkway pads

1. Section 06 1050 "Miscellaneous Rough Carpentry" for wood nailers, curbs, and blocking.

2. Section 07 4113 “Metal Roof Panels” for metal roof.

3. Section 07 6200 "Sheet Metal Flashing and Trim” for flashings and counter-flashings.

4. Section 07 9200 “Joint Sealants.”

5. Section 22 1423 "Storm Drainage Piping Specialties" for roof drains.

A. General Performance: Installed membrane roofing and base flashings shall withstand specified uplift pressures, thermally induced movement, and exposure to weather without failure due to 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, and demonstrated by membrane roofing manufacturer based on testing and field experience.

C. Roofing System Design: Provide 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 ASCE/SEI 7.

D. 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. Identify materials with FM Approvals markings.

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

2. Hail Resistance: SH

E. Energy Performance: Provide roofing system that is listed on the DOE’s ENERGY

STAR “Roof Products Qualified Product List” for low-slope roof products.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 2

A. Product Data: For each type of product indicated.

B. Shop Drawings:

1. For roofing system, include plans, elevation, sections, details, and attachments to other work.

2. Base flashings and membrane terminations.

3. Fastening patterns for insulation and membrane, demonstrating compliance with manufacturer's warranty requirements for projected wind loads and uplift.

C. Samples for Verification: For the following products:

1. Sheet roofing, of color specified, including T-shaped side and end lap seam.

2. Walkway pads.

3. Two roof cover fasteners of each type, length, and finish.

D. Qualification Data: For qualified Installer and manufacturer.

E. Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system complies with requirements specified in “Performance Requirements” Article.

1. Submit evidence of compliance with performance requirements.

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

G. Research/Evaluation Reports: For components of membrane roofing system, from the

ICC-ES.

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

I. Warranties: Sample of special warranties.

A. Manufacturer Qualifications: A qualified manufacturer that is UL listed 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 that is eligible to receive manufacturer’s special warranty.

1. Installer shall have ten years minimum experience installing the proposed membrane unless prior approval from Architect, Owner, and General Contractor/Construction Manager has been obtained.

C. Source Limitations: Obtain components including fasteners for membrane roofing system approved by Owner and/or 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. Materials shall be identified with appropriate markings of applicable testing agency.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 3

E. Pre-installation Roofing Conference: Conduct conference at Project site.

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.

10. Review Project size and scope to determine frequency of roofing inspections.

11. Review necessary communications with Owner, including furnishing Owner a copy of all roofing inspection reports.

12. Coordinate responsibilities between Roofing Contractor and General Contractor for protection, damage, and wear during construction.

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

1.7 PROJECT CONDITIONS

A. 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.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 4

1.8 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. No exclusions for standing water, the Owner will not accept any standing water in the completed installation.

2. Special warranty includes membrane roofing, base flashings, fasteners, substrate(insulation) board, roofing accessories, and other components of membrane roofing system.

3. Warranty shall include solar mount/rack system.

4. Warranty Period: 25 years from date of Substantial Completion.

B. Special Project Warranty: Submit roofing Installer’s warranty, on warranty form approved by Owner, signed by Installer, covering the Work of this Section, including all components of membrane roofing system such as membrane roofing, base flashing, fasteners, substrate (insulation) boards, and walkway products, for the following warranty period:

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

2.1 PVC MEMBRANE ROOFING

A. PVC Sheet: ASTM D 4434, Type lll, fabric reinforced.

1. Membrane must be manufactured by the company supplying the warranty (no private labeling) with a minimum successful track record equal to the specified warranty period.

2. Membrane, installed by the bidder, must be able to physically be walked and inspected by an Alpine School District representative along with documentation of the authenticity of said successful track record, and be located in the same geographical region as the project that said membrane would be installed on.

Membrane shall not have any significant formulation changes within said successful track record. In order to comply with the successful track record bidders will be required to submit, with their bid, a list of buildings in the Intermountain area on which their proposed single ply PVC roof has been installed. The address of the building(s) and name of the owner(s) and contact(s) are required.

3. Manufacturers: Subject to compliance with requirements.

4. Thickness: 60 mils, minimum, with minimum 27 mils above reinforcing.

5. Exposed Face Color: White.

B. Alternates:

1. Alternate No. 1: 72 mils minimum, with minimum 35 mils above reinforcing and a 25-year warranty.

2. Alternate No. 2: 80 mils minimum, with minimum 40 mils above reinforcing and a 25-year warranty.

3. Alternate No. 3: 60 mils nominal, with a 20-year warranty.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 5

2.2 INDUCTION FASTENING SYSTEM

A. Basis of Design: Contract Documents are based on system specified below to establish a standard of quality. Other manufacturers offering systems with equivalent characteristics may be considered, provided deviations are minor, design concept as expressed in the Contract Documents is not changed, and system is approved by and meets roofing system manufacturer's recommendations.

1. Manufacturer: OMG Roofing Products; www.olyfast.com

2. System: Rhinobond.

2.3 AUXILIARY MEMBRANE ROOFING MATERIALS

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

1. Liquid-type auxiliary materials shall comply with VOC limits of authorities having jurisdiction.

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

C. Bonding Adhesive: Manufacturer’s standard.

D. Metal Termination Bars: Manufacturer’s standard, predrilled stainless-steel or aluminum bars, approximately 2-1/4 inch high x 1/8 inch thick, C-shaped, with sealant shelf; with anchors. Flat termination bar is NOT permitted.

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

F. Coated Flashings: Manufacturer’s standard coated metal flashings in thickness as recommended by manufacturer for indicated use and complying with performance requirements, but with metal thickness not less than 0.028 inches.

G. Miscellaneous Accessories: Provide cone and vent sheet flashings, inside and outside corner sheet flashings, T-joint covers, termination reglets, and other accessories.

2.4 INSULATION MATERIALS

A. Substrate Board: Rigid polyisocyanurate with black mat facers 48 inches x96 inches installed in two layers to meet desired R-value.

1. R-Value: 30, minimum.

B. Where tapered insulation, crickets, saddles, tapered edge strips, or other insulation shapes are indicated, provide rigid polyisocyanurate, shaped as required to promote drainage and proper roof slope.

1. Minimum roof slope: 1/4 inch per 12 inches (1:48).

2. Taper insulation to facilitate drainage to primary roof drains.

C. 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.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 6

2.5 WALKWAYS

A. Flexible Walkways: Factory-formed, heavy-duty, slip-resisting, surface-textured walkway pads, approximately 3/16 inch thick and acceptable to membrane roofing system manufacturer.

1. Size: 3’-0” wide by lengths indicated or as graphically shown on the roof plans.

2. Provide around roof access hatch, at high roof drip edge and around mechanical equipment as indicated on the Drawings.

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.

2. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at penetrations.

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

A. Clean substrate of dust, debris, moisture, and other substances. Remove sharp projections.

B. Prevent materials from spilling or migrating onto surfaces of other construction.

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 in the forecast. Remove and discard temporary seals before beginning wok on adjoining roofing.

D. Do not begin installation in inclement weather and only install as much insulation in a day as can be covered with the roof membrane.

3.3 INSULATION BOARDS

A. Installation of substrate boards shall be as per manufacturer's recommendations.

B. Install substrate board with long joints in continuous straight lines, perpendicular to roof slopes with end joints staggered between rows. Tightly butt substrate boards together.

C. Install second layer with end and side joints offset one-foot minimum from joints in first layer.

3.4 MECHANICALLY FASTENED MEMBRANE ROOFING INSTALLATION

A. Mechanically fasten membrane roofing over area to receive roofing and install according to roofing system manufacturer’s written instructions.

1. Install sheet according to ASTM D 5082.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 7

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

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

D. Plates:

1. Place plates in grid pattern on roof insulation in accordance with thermoplastic membrane roofing section.

2. Install required number of plates and fasteners per 4-foot by 8-foot insulation to achieve membrane roofing manufacturer’s required FM rating.

3. Install plates in straight rows in at least 1 direction in accordance with membrane roofing manufacturer’s prescriptive fastening patterns for roof field, perimeter, and corners.

4. Secure plates in accordance with membrane roofing manufacturer’s instructions using specified fasteners.

5. Do not overdrive fasteners on plates.

6. Install plates and fasteners tight and flat to roof insulation with no dimpling of surface.

E. Lay membrane roofing over roof insulation and fastened plates in accordance with thermoplastic membrane roofing manufacturer’s instructions. Accurately align membrane roofing and maintain uniform side and end laps of minimum dimensions required by manufacturer. Apply membrane roofing with side laps shingled with slope of roof deck where possible.

1. Tack welding for purpose of temporary restraint is not permitted.

F. Calibration of Induction Welding Tools:

1. Calibrate each induction welding tool in accordance with membrane roofing manufacturer’s instructions to appropriate level for site conditions.

2. Adjust induction welding tools to achieve maximum bond strength based on ambient temperature from 0 to 120 degrees F.

3. Recalibrate induction welding tools whenever ambient temperature changes up or down by 15 degrees F.

4. Adjust energy level of induction welding tools in accordance with membrane roofing manufacturer’s instructions to produce optimal bond.

5. Optimal Bond: 100 percent bond.

G. Bonding Membrane Roofing:

6. Operate calibrated induction welding tools and magnetic cooling clamps in accordance with membrane roofing manufacturer’s instructions.

7. Ensure induction welding tools are centered over plates.

8. Create 100 percent bond between underside of membrane roofing and top of plates.

9. Ensure total, even, consistent adhesion of membrane roofing to top of plates.

10. Partial Bond of Membrane Roofing to Plates: Not acceptable.

H. Mechanically fasten or adhere membrane roofing securely at terminations, penetrations, and perimeter of roofing. Fastening patterns and frequencies shall conform to manufacturer's warranty requirements for building height, wind load, and uplift.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 8

I. 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 to prove and verify seam weld continuity.

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 does not comply with requirements.

J. Install roof system to assure positive drainage from all areas. No ponding or standing water will be accepted on completed roof installation.

3.5 BASE FLASHING INSTALLATION

A. Verify heights of flashings. Tops of curbs shall be minimum 24 inches above roof deck. Flashings shall extend vertically at least 12 inches above adjoining roof surface.

B Install sheet flashings and flashing accessories and adhere to substrates according to membrane roofing system manufacturer’s written instructions.

1. Ensure membrane flashing thickness is the same thickness as approved roof membrane (60, 72, or 80 mils as specified).

2. Install T-joint membrane cover patches as required.

3. Pipe boots shall be field flashed using same membrane thickness as required in the roof membrane

C. 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.

D. Flash penetrations and field-formed inside and outside corners with same membrane as specified for roof system.

E. 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.

F. Terminate and seal sheet flashings as required by roofing manufacturer.

G. Extend flashing membrane over and down exterior of parapet wall 1 inch down from top of the masonry that the top plate is attached to.

3.6 WALKWAY INSTALLATION

A. Flexible Walkways: Install walkway products in locations indicated. Heat weld to substrate or adhere walkway products to substrate with compatible adhesive according to roofing system manufacturer’s written instructions.

1. Install walkways around all sides of mechanical rooftop equipment, at roof access hatches, under eaves of high roof along drip line and where indicated on Drawings.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 9

3.7 FIELD QUALITY CONTROL

A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.

B. In Progress Inspections: Owner will require a qualified manufacturer’s representative to perform tests and inspections with inspections during period of installation (frequency as agreed during pre-installation conference) and a final inspection upon completion. Written inspection reports are to be provided to the Owner.

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

D. Additional inspections, at Contractor’s expense, will be performed to determine compliance of replaced or additional work with specified requirements.

E. Owner's inspections and expectations to be followed throughout roofing system's installation. Owner reserves the right to perform test cuts & self-inspections without voiding or affecting warranty.

3.8 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. Contractor and Roofing Contractor shall coordinate responsibilities prior to construction for protecting the roofing system.

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.

1. Verify that roof does not have any areas where standing water will accumulate.

C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction. Contractor and Roofing Contractor shall coordinate responsibilities prior to construction for protecting and cleaning the roofing system.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 10

3.9 ROOFING INSTALLER'S WARRANTY

A. WHEREAS _ of _, herein called the "Roofing

Installer," has performed roofing and associated work ("work") on the following project:

1. Owner: _

2. Address: _

3. Building Name/Type: _

4. Address: _ _

5. Area of Work: _ _

6. Acceptance Date: _ _

7. Warranty Period: _ _

8. Expiration Date: _ _

B. AND WHEREAS Roofing 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 Installer hereby warrants, subject to terms and conditions herein set forth, that during Warranty Period he will, at his 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 _ _ mph;

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.

2. When work has been damaged by any of foregoing causes, Warranty shall be null and void concerning that area of roof that is directly affected by said causes until such damage has been repaired by a manufacturer's certified Installer and until cost and expense thereof have been paid by Owner or by another responsible party so designated.

3. Roofing Installer is responsible for damage to work covered by this Warranty but is not liable for consequential damages to building or building contents resulting from leaks or faults or defects of work.

CONSTRUCTION BID SET POLYVINYL-CHLORIDE (PVC) ROOFING SECTION 07 5419 – PAGE 11

4. During Warranty Period, if Owner allows alteration of work by anyone other than Roofing Installer, including cutting, patching, and maintenance in connection with penetrations, attachment of other work, and positioning of anything on roof, this Warranty shall become null and void on date of said alterations for the area directly affected by said alterations but not excluding any roofing system outside of the directly impacted area, but only to the extent said alterations affect work covered by this Warranty. If Owner engages Roofing Installer to perform said alterations, Warranty shall not become null and void unless Roofing Installer, before starting said work, shall 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.5. 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 shall become null and void on date of said change, but only to the extent said change affects work covered by this Warranty.

6. Owner shall promptly notify Roofing Installer of observed, known, or suspected leaks, defects, or deterioration and shall afford reasonable opportunity for Roofing Installer to inspect work and to examine evidence of such leaks, defects, or deterioration.

7. This Warranty is recognized to be the only warranty of Roofing Installer on said work and shall 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 shall not operate to relieve Roofing Installer of responsibility for performance of original work according to 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 , 20 _ .

1. Authorized Signature:

a. Name:

b. Title:

END OF SECTION

SECTION 076200 - SHEET METAL FLASHING AND TRIM

1. Sheet metal flashing and trim as shown on drawings.

2. Miscellaneous sheet metal.

1. Section 042000 “Unit Masonry”.

2. Section 044300 “Natural Stone Thin Veneer”.

3. Section 061000 “Rough Carpentry” for wood mailers, curbs, and blocking.

4. Section 074113 “Metal Roof and Soffit Panels”.

5. Section 075419 “Polyvinyl-Chloride (PVC) Membrane Roofing” (Includes Line-

I t e m Cost) for installing sheet metal flashing and trim integral with roofing.

6. Section 084113 “Aluminum-Framed Entrances and Storefronts”.

A. General: Sheet metal flashing and trim assemblies as indicated shall withstand wind loads, structural movement, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction. Completed sheet metal flashing and trim shall not rattle, leak, or loosen, and shall remain watertight.

B. Shop Drawings: Show installation layouts of sheet metal flashing and trim, including plans, elevations, expansion-joint locations, and keyed details. Distinguish between shop- and field-assembled work.

1. Include details for forming, joining, supporting, and securing sheet metal flashing and trim, including pattern of seams, termination points, fixed points, expansion joints, expansion-joint covers, edge conditions, special conditions, and connections to adjoining work.

C. Samples: For each exposed product and for each finish specified.

D. Maintenance data.

E. Warranty: Sample of special warranty.

A. Sheet Metal flashing and Trim Standard: Comply with SMACNA's "Architectural Sheet Metal

Manual" unless more stringent requirements are specified or shown on Drawings.

B. Mockups: Build mockups to verify selections made under sample submittals and to demonstrate aesthetic effects and set quality standards for fabrication and installation.

Approved mockups may be incorporated into the finished project.

1. Build mockup of typical roof eave, including built-in gutter, trim, and apron flashing Approximately 10 feet (3.0 m) long, including supporting construction cleats, seams, attachments, underlayment, and accessories.

C. Pre-installation Conference: Conduct conference at Project site.

1. Meet with Owner, Architect, Owner’s insurer if applicable, Installer, and installers whose work interfaces with or affects sheet metal flashing and trim including installers of roofing materials, roof accessories, unit skylights, and roof-mounted equipment.

2. Review methods and procedures related to sheet metal flashing and trim.

3. Examine substrate conditions for compliance with requirements, including flatness and attachment to structural members.

4. Review special roof details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect sheet metal flashing.

5. Document proceedings, including corrective measure and actions required, and furnish copy of record to each participant.

A. Do not store sheet metal flashing and trim materials in contact with other materials that might cause staining, denting, or other surface damage. Store sheet metal flashing and trim materials away from uncured concrete and masonry.

B. Protect strippable protective covering on sheet metal flashing and trim from exposure to sunlight and high humidity, except to the extent necessary for the period of sheet metal flashing and trim installation.

1.7 WARRANTY

A. Special Warranty on Finishes: Manufacturer's standard form in which manufacturer agrees to repair finish or replace sheet metal flashing and trim that shows evidence of deterioration of factory-applied finishes within specified warranty period.

1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:

a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.

b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.

c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Finish Warranty Period: Twenty-five (25) years from date of Substantial Completion.

2.1 SHEET METALS

A. General: Protect mechanical and other finishes on exposed surfaces from damage by applying a strippable, temporary protective film before shipping.

B. Metallic-Coated Steel Sheet: Provide G - 9 0 g a l v a n i z e d s t e e l o r e q u i v a l e n t sheet according to ASTM A 792/A 792M, C l a s s AZ50 ( Class AZM150) c o a t i n g designation, Grade 40 (Grade 275); prepainted Kynar finish to comply with ASTM A 755/A

755M.

1. Surface: Smooth, flat.

2. Exposed Coil-Coated Finish:

a. Two-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

b. Color: As selected from one of the following manufacturers:

1) Berridge.

2) Fabral.

3) Firestone.

4) MBCI.

2.2 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous items as required for complete sheet metal flashing and trim installation and recommended by manufacturer of primary sheet metal or manufactured item unless otherwise indicated.

B. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and bolts, and other suitable fasteners designed to withstand design loads and recommended by manufacturer of primary sheet metal or manufactured item.

1. General: Blind fasteners or self-drilling screws, gasketed, with hex-washer head.

a. Exposed Fasteners: Heads matching color of sheet metal using plastic caps or factory-applied coating.

b. Blind Fasteners: High-strength aluminum or stainless-steel rivets suitable for metal being fastened and painted to match sheet metal.

2. Fasteners for Stainless-Steel Sheet: Series 300 stainless steel.

3. Fasteners for Zinc-Coated (Galvanized), Aluminum-Zinc Alloy-Coated Steel Sheet: Hot-dip galvanized steel according to ASTM A 153/A 153M or ASTM F 2329 or Series 300 stainless steel.

C. Solder:

1. For Stainless Steel: ASTM B 32, Grade Sn60, with an acid flux of type recommended by stainless-steel sheet manufacturer.

2. For Zinc-Coated (Galvanized) Steel: ASTM B 32, Grade Sn50, 50 percent tin and 50 percent lead or Grade Sn60, 60 percent tin and 40 percent lead.

D. Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic, non-staining tape 1/2 inch (13 mm) wide and 1/8 inch (3 mm) thick.

E. Elastomeric Sealant: ASTM C 920, elastomeric polymer sealant; low modulus; of type, grade, class, and use classifications required to seal joints in sheet metal flashing and trim and remain watertight.

F. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;

polyisobutylene plasticized; heavy bodied for hooked-type expansion joints with limited movement.

G. Epoxy Seam Sealer: Two-part, noncorrosive, aluminum seam-cementing compound, recommended by aluminum manufacturer for exterior nonmoving joints, including riveted joints.

H. Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D 1187.

2.3 REGLETS

A. Reglets: Units of type, material, and profile indicated, formed to provide secure interlocking of separate reglet and counter flashing pieces, and compatible with flashing indicated with interlocking counter flashing on exterior face, of same metal as reglet.

1. Material: 24 ga. pre-finished steel.

2.4 FABRICATION, GENERAL

A. General: Custom fabricate sheet metal flashing and trim to comply with recommendations in

SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, geometry, metal thickness, and other characteristics of item indicated. Fabricate items at the shop to greatest extent possible.

1. Obtain field measurements for accurate fit before shop fabrication.

2. Form sheet metal flashing and trim without excessive oil canning, buckling, and tool marks and true to line and levels indicated, with exposed edges folded back to form hems.

3. Faces larger than 7” require stiffening bend.

4. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not allowed on faces exposed to view.

B. Sealed Joints: Form non-expansion but movable joints in metal to accommodate elastomeric sealant.

C. Expansion Provisions: Where lapped expansion provisions cannot be used, form expansion joints of intermeshing hooked flanges, not less than 1 inch (25 mm) sealant concealed within joints.

deep, filled with butyl

D. Fabricate cleats and attachment devices from same material as accessory being anchored or from compatible, noncorrosive metal such as galvanized, min. 24 ga.

E. Seams: Form seams and seal with elastomeric sealant unless otherwise recommended by sealant manufacturer for intended use. Rivet joints where necessary for strength and paint to match.

2.5 ROOF DRAINAGE SHEET METAL FABRICATIONS

A. Parapet Scuppers: Fabricate scuppers of dimensions required with closure flange trim to exterior, 4-inch- (100-mm-) wide wall flanges to…