Specifications_Bldg_90_C51_Museum_Roof_Replacement_project__184_937_00.pdf

THERMOPLASTIC MEMBRANE ROOFING

SECTION 075400 - THERMOPLASTIC MEMBRANE ROOFING

PART I - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 0 I Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1 Substrate board.

2 Roof insulation.

3 Miscellaneous roofing related materials/systems.

4 Roof Walkways.

B. Related Sections include the following:

1 . Division 06 Section “Rough Carpentry" for wood nailers, curbs, blocking and plywood.

2. Division 07 Section “Joint Sealants.”

3. Division 07 Section “Roof Specialties.”

4. Division 07 Section "”Roof Accessor ies.”

5. Division 02 Section “Selective Demolition.”

1.3 DEFINITIONS

A. Roofing Terminology: Refer to ASTM D 1079 and glossary of N RCA's "The NRCA Roofing and Waterproofing Manual" for definition of terms related to roofing work in this Section.

1.4 PERFORMANCE REQUIREMENTS

A. Genera l : Provide installed roofing membrane and base flashings that remain watertight; do not perm it the passage of water; and resist specified uplift pressures , thermally induced movement , and exposure to weather without failure.

B. 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.

C. Roofing System Design: Provid e membrane roofing system that is identical to systems that have been successfully tested by a qualified testing and inspecting agency to resist up-lift pressure calculated according to ASCE/SEI 7 using 90 mph (second gust) design wind speed, Exposu re B and Importance factor of 1 .00:.

1. Corner Uplift Pressure: 57.2 psf

2. Perimeter Uplift Pressure: 38.0 psf

3. Field-of-Roof Uplift Pressure: 22.6 psf

4. Width of perimeter and corner areas of discontinuity measured from inside face of exterior parapets: 8-ft.

1.5 SUBMITTALS

A. Product Data: For each type of product listed in these specifications of indicated in the drawings.

B. LEED Submittals:

1. Product Test Reports for Credit SS 7.2: For roof materials, documentation indicating that roof materials comply with Solar Reflectance Index requirement.

2. Product Data for Credit EQ 4.1 : For adhesives and sealants, including printed statement of VOC content.

C. For roofing system. Include plans, elevations, sections, details, and attachments to other Work not specifically indicated in the drawings.

1 Roof plan showing orientation of membrane roofing and sheet layout.

2. Tapered insulation cricket layouts

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

E. Warranties: Sample of Special warranties specified in this Section.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: A qualified firm with 5-years (minimum) documented experience installing thermoplastic mem brane systems that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's warranty.

B. Manufacturer Qualifications: A qualified manufacturer with UL listing specified identical to that used for this Project.

C. Source Limitations: Obtain components for membrane roofing system from or approved by roofing membrane manufacturer.

D. 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.

Exterior Fire-Test Exposure: Class C; ASTM E I 08, for application and roof slopes indicated.

1.7 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, 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.

1. Place insulation bundles on sleepers, stickers or pallets. Do not store insulation in direct contact with ground.

2. Remove insulation "shrink-wrap" packaging and cover with breathable canvas tarps.

3. Weigh or tie down insulation to prevent displacement by wind.

4. 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 damage to, or permanent deflection of roof deck.

1.8 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.

1.9 WARRANTY

A. Special Warranty: Manufacturer's standard 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. Failure includes roof leaks.

1. Special warranty includes roofing membrane, base flashings, roofing membrane, accessories, roof insulation crickets, fasteners, substrate boards, walkway products and other components of membrane roofing system.

2. Warranty Period: 30 years total system from date of Substantial Completion.

B. Special Project Warranty: 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 membrane roofing system such as roofing membrane, base flashing, roof insulation crickets, fasteners, substrate boards and walkway products, for the following warranty period:

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

PART 2 - PRODUCTS

2.1 THERMOPLASTIC ROOFING MEMBRANE

A. Manufacturers and Products:

1. TPO Membrane systems that may be incorporated into the work as noted below, but is not limited to:

a. "Ultra ply" as manufactured by Firestone Building Products.

1) Thickness: 80 mils, nominal.

2) Sheet Width: 8 foot minimum.

3) Color: White.

4) Warranty: 40-yearsystem warranty.

b. "Sureweld" as manufactured by Carisle Syntec.

1) Thickness: 80 mils, nominal.

3) Color: White.

4) Warranty: 30-yearsystem warranty.

c. "Genflex TPO" as manufactured by Genflex Roofing Systems.

d. Thickness: 80 mils, nominal.

1) Sheet Width: 8 foot mini m um.

2) Color: White.

3) Warranty: 30 year system warranty.

e. Versico Versi Weld:

1) Thickness: 80 mils nominal

2) Sheet Width: 8 foot minimum

3) Color: White

4) Warranty: 30-yearsystem warranty.

THERMOPLAST IC MEMBRANE ROOFING

f. GA F Everguard TPO Membrane.

1 ) Thickness: 80 mils, nominal.

g. Jons Manville TPO Membrane.

1 ) Thickness: 80 mils, nominal.

Exposed face color white shall have a minimum SRI 78 as measured per ASMT E903, ASTM

1918 or ASTM C l 549.

2.2 AUXILIARY MATERIALS

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

I. Liquid-type auxiliary materials shall meet YOC limits of authorities having jurisdiction.

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

C. Bondi ng Adhesive: Manufacturer's standard solvent-based bonding adhesive for membrane, and solvent-based bonding adhesive for base flashings.

D. Non-Curing Sealant: Manufacturer's standard butyl based mastic sealant.

E. Metal Termination Bars: Manufacturer 's standard predrilled stainless-steel or aluminum bars, approximately 1 by 1/8 inch thick; with threaded fasteners.

F. Fasteners: Factory-coated threaded steel fasteners and metal or plastic plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening membrane to substrate, and acceptable to membrane roofing system manufacturer.

G. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, preformed inside and outside corner sheet flashings, termination reglets cover strips, and other accessories.

2.3 ROOF INSULATION

A. General: Provide preformed roof insulation boards that comply with requirements and referenced standards, selected from manufacturer's standard sizes and of thicknesses indicated (R38)

B. Polyisocyanurate Board Insulation (Both Tapered and Non Tapered as indicated): ASTM

C 1289, Type II, Class I Grade 2, felt or glass-fiber mat facer on both major surfaces.

Products: Approved by membrane Manufacturer.

1. Provide factory-tapered insulation boards

a. Stack as required on roof surface so finished slope is a minimum of 1/4 inch per 12 inches, unless otherwise indicated.

2. R6.0 per inch minimum.

C. Provide preformed tapered saddles, crickets, edge strips, and other insulation shapes where indicated for sloping to drain. Fabricate to slopes indicated.

1. Molded polystyrene Board Insulation as approved by membrane manufacturer for application.

2.4 INSULATION ACCESSORIES

A. General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatible with membrane roofing.

B. Fasteners: Factory-coated threaded steel fasteners and metal or plastic plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening membrane to substrate, and acceptable to membrane roofing system manufacturer.

C. Cover Board/Substrate Board: ASTM C 1278/C 1278M, glass-mat, water-resistant gypsum substrate, 1/4 inch thick.

1. "Dens-Deck" by Georgia-Pacific Corporation.

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

2.5 WALKWAYS

A. Flexible Walkways: Factory-formed, nonporous, heavy-duty, solid-thermoplastic, slip- resisting, surface-textured walkway pads or rolls acceptable to membrane roofing system manufacturer.

PART 3 - EXECUTION

3.1

3.2

PREPA RATION/ EXAMINATION

A. 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.

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

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

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

COORDINATION

A. Prior to beginning operations which generate fumes, coordinate covering, redirection, ducting or shut down of building ventilation systems with Owner.

1. Provide covers or additional temporary horizontal or vertical ducting as necessary to minimize potential for fume infiltration into existing roof-top building ventilation intake openings.

2. Remove temporary covers over existing ventilation intakes when fume generating roofing operations are not taking place or roofing work has ceased for the day.

B. 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 rai n is forecast.

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

c. Coordinate penetrations and fastening systems for the lightening protection system, equipment, cables and conduit.

3.3

VAPOR RETARDER INSTALLATION

A. Polyethylene Film 10 mils: Loosely lay polyethylene-film vapor retarder in a single layer over area to receive vapor retarder, side and end lapping each sheet a minimum of 2 inches and 6 inches respectively.

1. Continuously seal side and end laps with tape.

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

3.4 INSULATION INSTALLATION

A. Coordinate installing membrane roofing system components so insulation is 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 roof insulation.

C. Install tapered insulation under area of roofing to conform to slopes indicated.

D. Install insulation under area of roofing to achieve required thickness. Where overall insulation thickness is 2.7 inches or greater, install two or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches in each direction.

E. Mechanically Fastened and Adhered Insulation: Install each layer of insulation and secure to deck as follows:

1. Fasten first layer of insulation to resist uplift pressure at corners, perimeter, and field of roof.

2. Set each subsequent layer(s) of insulation in ribbons of bead-applied insulation adhesive, firmly pressing and maintaining insulation in place - OR-

3. Set each subsequent layer(s) of insulation in a uniform coverage of full-spread insulation adhesive, firmly pressing and maintaining insulation in place.

4. Mechanical fasteners required to penetrate top rib of metal decking.

F. Install cover boards over insulation with long joints in continuous straight l ines with end joints staggered between rows. Offset joints of insulation below a minimum of 6 inches in each direction.

Loosely butt cover boards together and fasten to roof deck.

1. Mechanically fasten cover boards and insulation to resist uplift pressure at corners, perimeter, and field of roof.

3.5 FULLY A DHERED MEM BRANE ROOFING INSTALLATION

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

I. 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.

ROOF SPECIALTIES

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 slow of roof deck where possible.

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.

I. 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 does not comply with requirements.

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

3.6 BASE FLASHING INSTALLATION

A. Install sheet flashings and preformed flashing accessories and adhere to existing substrates and substrate boards according to membrane roofing system manufacturer's written instruct ions.

B. Apply solvent-based bonding adhesive to substrate and underside of sheet flashing at required rate and allow to partially dry (flash). Do not apply bonding adhesive to seam area of flashing.

C. Flash penetrations and field-formed inside and outside corners with sheet flashing.

D. Clean seam areas and overlap and firmly roll sheet flashings into the adhesive. 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 and as indicated in drawings.

3.7 WA LKWAY INSTALLATION

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

3.8 FIELD QUALITY CONTROL

A. Monitoring: Roofing Contractor shall assign competent supervisor to monitor installation of the roofing system on a daily basis to insure quality of membrane installation. Finished roof and base flashing membranes shall lay flat without wrinkles or puckers.

1. Roof and or base flashing membranes with wrinkles or puckers shall be removed and replaced with new membrane at no cost to the Project.

B. Manufacturer s Periodic Roof Inspection: Roofing Contractor shall engage Roof System

Manufacturers technical field representative to perform periodic site inspections at the following intervals during construction and submit field report to Design Builder.

1. Start of installation of insulation, cover board and membrane.

2. 50% Completion of roof membrane system.

C. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion and submit report to Design Builder.

1. Notify Design Builder or Owner 48 hours in advance of date and time of inspection.

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

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

3.9 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 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.

3. 1 0 ROOF ING INSTALLER'S WARRANTY

A. 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, B. 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.

C. 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 90 mph (3-second gust);

c. fire;

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

e. Faulty construct ion 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 until such damage has been repaired by Roofing 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.

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, 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 Design Builder.

EN D OF SECTION 075400

SECTION 077100 - ROOF SPECIALTIES

PART I - GENERAL

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

A. Section Includes:

1 . Copings.

2. Roof-edge flashings.

3. Roof-edge drainage systems.

4. Reglets and counter flashings.

B. Related Sections:

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

2. Division 07 Section "Roof Accessories" for set-on-type curbs, equipment supports, roof hatches, vents, and other manufactured roof accessory units.

3. Division 07 Section "Joint Sealants" for field-applied sealants between roof specialties and adjacent materials.

1.3 PERFORMANCE REQUIREMENTS

A. General Performance: Roof specialties shall withstand exposure to weather and resist thermally induced movement without failure, rattling, leaking, or fastener disengagement due to defective manufacture, fabrication, installation, or other defects in construction.

B. SPRI Wind Design Standard: Manufacture and install copings and roof-edge flashings tested according to SPRlES- I and capable of resisting the following design pressures:

1. Design Pressure: Basic wind speed: 90 mph, exposure C, field pressure, edge uplift pressure.

C. Thennal Movements: Allow for thennal movements from ambient and surface temperature changes to prevent buckling, opening of joints, hole elongation, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Provide clips that resist rotation and avoid shear stress as a result of thennal movements. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change (Range): 120 deg F, ambient; I SO deg F, material surfaces.

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.

B. Shop Drawings: For roof specialties. Include plans, elevations, expansion-joint locations, keyed details, and attachments to other work. Distinguish between plant- and field-assembled work Include the following:

1. Details of termination points and assemblies, including fixed points.

2. Details of special conditions.

C. Maintenance Data: For roofing specialties to include in maintenance manuals.

D. Warranty: Sample of special warranty.

1 .5 DELI VERY, STORAGE, AND HANDLING

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

B. Protect strippable protective covering on roof specialties from exposure to sunlight and high humidity, except to extent necessary for the period of roof specialties installation.

1.6 WARRA NTY

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

I. Fluoropolymer 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: 25 years from date of Substantial Completion.

2.1 EXPOSED METALS

A. Pre-Finished Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 coating designation.

1. Surface: Smooth, flat finish.

2. Exposed Coil-Coated Finishes: Pre-painted by the coil-coating process to comply with

ASTM A 755/A 755M. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

a. Three-Coat Fluoropolymer: AAMA 62 l. System consisting of primer, fluoropolymer color coat, and clear fluoropolymer topcoat, with both color coat and clear topcoat containing not less than 70 percent PVDF resin by weight.

2.2 CONCEALED METALS

A. Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 coating designation.

2.3 UNDERLAYMENT MATERIALS

A. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils thick, 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.

l. Thermal Stability: ASTM D 1970; stable after testing at 240 deg F.

2. Low-Temperature Flexibility: ASTM D 1970; passes after testing at minus 20 deg F.

B. Polyethylene Sheet: 6-mil- thick polyethylene sheet complying with ASTM D 4397.

C. Slip Sheet: Building paper, 3-lb/100 sq. ft. minimum, rosin sized.

2.4 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, protective coatings, sealants, and other miscellaneous items required by manufacturer for a complete installation.

B. Fasteners: Manufacturer's recommended fasteners, suitable for appl ication and designed to meet performance requirements. Furnish the following unless otherwise indicated:

1. Exposed Penetrating Fasteners: Gasketed screws with hex washer heads matching color of sheet metal.

2. Fasteners for Aluminum: Aluminum or Series 300 stainless steel.

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

4. Fasteners for Zinc-Coated (Galvanized) Steel Sheet: Series 300 stainless steel or hot-dip zinc-coated steel according to ASTM A 153/A 153M or ASTM F 2329.

C. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane or silicone polymer sealant of type, grade, class, and use classifications required by roofing-specialty manufacturer for each application.

D. Buty l Sealant: ASTM C 13 1 1, single-component, solvent-release buty l rubber sealant;

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

E. Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D 1 187.

F. Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required for application.

2.5 COPINGS

A. Copings: Manufactured coping system consisting of formed-meta l coping cap in section lengths not less than 12 feet, concealed anchorage; corner units, end cap units, and concealed splice plates with same finish as coping caps.

I. Framed coping-Cap Material: Zinc-coated steel, nominal 0.028-inch thickness 22 gauge.

a. Finish: Three-coat fluoroeolymer.

b. Color: As selected by Design BUILDER from manufacturer's full range.

2. Corners: Factory mitered and welded.

3. Coping-Cap Attachment Method: Face leg hooked to continuous cleat with back leg fastener exposed, fabricated from coping-cap material.

4. Snap-on-Coping Anchor Plates: Concealed, galvanized-steel sheet, 12 inches wide, with integral cleats.

5. Face Leg Cleats: Concealed, continuous galvanized-steel sheet.

2.6 ROOF-EDGE FLASHINGS

A. Canted Roof-Edge Fascia: Manufactured, two-piece, roof-edge fascia consisting of snap-on metal fascia cover in section lengths not exceeding 12 feet and a continuous formed galvanized- steel sheet cant, 0.028 inch thick, minimum, with extended vertical leg terminating in a drip- edge cleat. Provide matching corner units.

1. Manufacturers: Subject to compliance with requ irements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to,

a. Architectural Products Company.

b. Cheney Flashing Company.

c. Hickman Company, W. P.

d. Johns Manville.

e. Metal-Era, Inc.

f. Metal-Fab Manufacturing, LLC.

g. MM Systems Corporation.

h. Petersen Aluminum Corporation.

2. Fascia Cover: Fabricated from the following exposed metal:

a. Prefinished Zinc Coated Steel: Nominal 0.028-inch thickness.

3. Corners: Factory mitered and continuously welded.

4. Splice Plates: Concealed, of same material, finish, and shape as fascia cover.

5. Fascia Accessories: Fascia extenders with continuous hold-down cleats, Wall cap, Soffit trim.

B. Roof-Edge Fascia: Manufactured, two-piece, roof-edge fascia consisting of snap-on metal fascia cover in section lengths not exceeding 12 feet and a continuous formed- or extruded- aluminum anchor bar with integral drip-edge cleat to engage fascia cover. Provide matching comer units.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. Hickman Company, W. P.

b. Johns Manville.

c. Metal-Era, Inc.

d. Metal-Fab Manufacturing, LLC.

2. Fascia Cover: Fabricated from the following exposed metal:

a. Prefin ished Zinc-Coated Steel: Nominal 0.028 inch thick 22 gauge.

4. Splice Plates: Concealed, of same material, finish, and shape as fascia cover.

5. Fascia Accessories: Fascia extenders with continuous hold-down cleats, Wall cap, Soffit trim.

C. Zinc-Coated Steel Finish: Three-coat fluoropolymer.

1. Color: As selected by Design Builder from manufacturer's full range.

2.7 ROOF-EDGE DRA INAGE SYSTEMS

A. Gutters: Manufactured in uniform section lengths not exceeding 12 feet, with matching corner units, ends, outlet tubes, and other accessories. Elevate back edge at least I inch above front edge.

Furnish flat-stock gutter straps, gutter brackets, expansion joints and expansion-joint covers fabricated from same metal as gutters.

1. Fabricate from the following exposed metal:

a. Zinc-Coated Steel: Nominal 0.028-inch 22gauge thickness.

2. Hanging Gutter Profile: SMACNA Style F according to SMACNA's "Architectural

Sheet Metal Manual."

4. Gutter Supports: Straps at maximum 36" O.C Spikes and ferrules with finish matching the gutters.

B. Downspouts: Plain rectangular complete with machine-crimped mitered elbows, manufactured from the following exposed metal. Furnish with metal hangers, from same material as downspouts, and anchors.

1. Zinc-Coated Steel: Nominal 0.028-inch 22 gauge thickness.

2.8 REGLETS AND COUNTERFLASHINGS

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

I. Cheney Flashing Company.

2. Fry Reglet Corporation.

3. Heckmann Building Products Inc.

4. Hickman Company, W. P.

5. Keystone Flashing Company, Inc.

6. Metal-Era, Inc.

7. Metal-Fab Manufacturing, LLC.

8. MM Systems Corporation.

B. Reglets: Manufactured units formed to provide secure interlocking of separate reglet and counterflashing pieces, from the following exposed metal:

1. Zinc-Coated Steel: Nominal 0.022-inch thickness.

2. Corners: Factory mitered and continuously welded.

3. Surface-Mounted Type: Provide reglets with slotted holes for fastening to substrate, with neoprene or other suitable weatherproofing washers, and with channel for sealant at top edge.

4. Stucco Type, Embedded: Provide reglets with upturned fastening flange and extension leg of length to match thickness of applied finish materials.

5. Multiuse Type, Embedded: For multiuse embedment in masonry mortar joints.

C. Counterflashings: Manufactured units of heights to overlap top edges of base flashings by 4 inches and in lengths minimum 12 feet designed to snap into reglets or through-wall-flashing receiver and compress against base flashings with joints lapped, from the following exposed metal:

1. Zinc-Coated Steel: Nominal 0.022-inch 24 gauge thickness.

D. Accessories:

1. Flexible-Flashing Retainer: Provide resilient plastic or rubber accessory to secure flexible flashing in reglet where clearance does not permit use of standard metal counterflashing or where reglet is provided separate from metal counterflashing.

2. Counterflashing Wind-Restraint Clips: Provide clips to be installed before counterflashing to prevent wind uplift of counterflashing lower edge.

E. Zinc-Coated Steel Finish: Three-coat fluoropolymer.

1. Color: Color to match coping flashings and gutter systems where exposed to view. Mill phosphatized for areas not exposed to views.

2.9

GENERAL FINISH REQUIREMENTS

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 from damage by applying a strippable, temporary protective covering before shipping.

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.

PA RT 3 - EXECUTION

A.

B.

c.

D.

EXAMINATION

Examine substrates, areas, and conditions, with Installer present, to verify actual locations, dimensions, and other conditions affecting performance of the Work.

Examine walls, roof edges, and parapets for suitable conditions for roof specialties.

Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely anchored.

Proceed with installation only after unsatisfactory conditions have been corrected.

INSTALLATION, GENERAL

General: Install roof specialties according to manufacturer's written instructions. Anchor roof specialties securely in place, with provisions for thermal and structural movement. Use fasteners, solder, protective coatings, separators, sealants, and other miscellaneous items as required to complete roof-specialty systems.

1. Install roof specialties level, plumb, true to line and elevation; with limited oil-canning and without warping, jogs in alignment, buckling, or tool marks.

2. Provide uniform, neat seams with minimum exposure of solder and sealant.

3. Install roof specialties to fit substrates and to result in watertight performance. Verify shapes and dimensions of surfaces to be covered before manufacture.

4. Torch cutting of roof specialties is not permitted.

5. Do not use graphite pencils to mark metal surfaces.

B. Metal Protection: Protect metals against galvanic action by separating dissimilar metals from contact with each other or with corrosive substrates by painting contact surfaces with bituminous coating or by other permanent separation as recommended by manufacturer.

I. Coat concealed side of roof specialties with bituminous coating where in contact with wood, ferrous metal, or cementitious construction.

2. Underlayment: Where installing metal flashing directly on cementitious or wood substrates, install a course of self-adhering, high-temperature sheet underlayment.

3. Bed flanges in thick coat of asphalt roofing cement where required by manufacturers of roof specialties for waterproof performance.

C. Expansion Provisions: Allow for thermal expansion of exposed roof specialties.

I. Space movement joints at a maximum of 12 feet with no joints within 12 inches of corners or intersections unless otherwise shown on Drawings.

2. When ambient temperature at time of installation is between 40 and 70 deg F, set joint members for 50 percent movement each way. Adjust setting proportionately for installation at higher ambient temperatures.

D. Fastener Sizes: Use fasteners of sizes that will penetrate wood blocking or sheathing not less than I -1/4 inches for nails and not less than 3/4 inch for wood screws.

E. Seal joints with elastomeric sealant as required by roofing-specialty manufacturer.

F. Seal joints as required for watertight construction. Place sealant to be completely concealed in joint. Do not install sealants at temperatures below 40 deg F.

G. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pre-tin edges of sheets to be soldered to a width of 1-1/2 inches except reduce pre-tinning where pre-tinned surface would show in completed Work. Tin edges of uncoated copper sheets using solder for copper. Do not use torches for soldering. Heat surfaces to receive solder and flow solder into joint. Fill joint completely. Completely remove flux and spatter from exposed surfaces.

3.3 COPING INSTALLATION

A. Install cleats, anchor plates, and other anchoring and attachment accessories and devices with concealed fasteners.

B. Anchor copings to meet performance requirements.

I. Interlock face and back leg drip edges of snap-on coping cap into cleated anchor plates anchored to substrate at minimum 32-inch centers manufacturer's required spacing that meets performance requirements.

2. Interlock face leg drip edge into continuous cleat anchored to substrate at 24-inch centers manufacturer's required spacing that meets performance req uirements. Anchor back leg of coping with screw fasteners and elastomeric washers at 24-inch centers or manufacturer's req uired spacing that meets performance req uirements.

3.4 ROOF-EDGE FLASHING INSTALLATION

A. Install cleats, cants, and other anchoring and attachment accessories and devices with concealed fasteners.

B. Anchor roof edgings with manufacturer's required devices, fasteners, and fastener spacing to meet performance requirements.

3.5 ROOF-EDGE DRAINAGE-SYSTEM INSTALLATION

A. General: Install components to produce a complete roof-edge drainage system according to manufacturer's written instructions. Coordinate installation of roof perimeter flashing with installation of roof-edge drainage system.

B. Gutters: Join and seal gutter lengths. Allow for thermal expansion. Attach gutters to firmly anchored gutter supports spaced not more than 32 inches apart. Attach ends with rivets and solder to make watertight. Slope to downspouts.

1. Install gutter with expansion joints as recommended by manufacturer.

C. Downspouts: Join sections with manufacturer's standard telescoping joints. Provide hangers with fasteners designed to hold downspouts securely to walls and I inch away from walls; locate fasteners at top and bottom and at approximately 48 inches o.c.

1. Provide elbows at base of downspout to direct water away from building.

2. Connect downspouts to underground drainage system indicated.

3.6 REGLET AND COUNTERFLASHING INSTALLATION

A. General: Coordinate installation of reglets and counterflashings with installation of base flashings.

B. Embedded Reglets: See Division 04 Section "Unit Masonry" for installation of reglets.

C. Surface-Mounted Reglets: Install reglets to receive flashings where flashing without embedded reglets is indicated on Drawings. Install at height so that i nserted counterflashings overlap 4 inches over top edge of base flashings.

D. Counterflashings: Insert counterflashings into reglets or other indicated receivers; ensure that counterflashings overlap 4 inches over top edge of base flashings. Lap counterflashing joints a minimum of 4 inches and bed with elastomeric sealant. Fit counterflashings tightly to base flashings.

ROOF ACCESSORIES

3.7 CLEANING AND PROTECTION

A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and weathering.

B. Clean and neutralize flux materials. Clean off excess solder and sealants.

C. Remove temporary protective coverings and strippable films as roof specialties are installed.

On completion of installation, clean finished surfaces including removing unused fasteners, metal filings, pop rivet stems, and pieces of flashing. Maintain roof specialties in a clean condition during construction.

D. Replace roof specialties that have been damaged or that cannot be successfully repaired by finish touchup or similar minor repair procedures.

END OF SECTION 077100

SECTION 077200 - ROOF ACCESSORIES

PART l - GENERAL

I.I RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 0 I Specification Sections, apply to this Section.

l.2 SUMMARY

1. Roof curbs.

2. Equipment supports.

3. Roof hatches.

4. Pipe supports.

1. Division 05 Section "Metal Fabrications" for metal vertical ladders, ships' ladders, and stairs for access to roof hatches.

2. Division 07 roofing Sections for roofing accessories.

3. Division 07 Section "Roof Specialties" for manufactured fasciae, copings, gravel stops, gutters and downspouts, and counter flashing.

4. Division 23 Section "HVAC Ventilators" for power roof-mounted ventilators.

1.3 PERFORMANCE REQUIREMENTS

A. General Performance: Roof accessories shall withstand exposure to weather and resist thermally induced movement without failure, rattling, leaking, or fastener disengagement due to defective manufacture, fabrication, installation, or other defects in construction.

1.4 SUBMITTALS

A. Product Data: For each type of roof accessory indicated. Incl ude construction details, material descriptions, dimensions of individual components and profiles, and finishes.

B. Shop Drawings: For roof accessories. Include plans, elevations, keyed details, and attachments to other work/coordination drawings. Indicate dimensions, loadings, and special conditions.

Distinguish between plant- and field-assembled work. Show the following on scale plans for roof mounted items and penetrations.

l. Size and location of roof accessories specified in this Section.

2. Method of attaching roof accessories to roof or building structure.

3. Other roof-mounted items including mechanical and electrical equipment, ductwork, piping, and conduit.

4. Req uired clearances.

C. Operation and Maintenance Data: For roof accessories to include in operation and maintenance manuals.

D. Warranty: Sample of special warranty.

l.5 COORDINATION

A. Coordinate layout and installation of roof accessories with roofing membrane and base flashing and interfacing and adjoining construction to provide a leak-proof, weather-tight, secure, and noncorrosive installation.

B. Coordinate dimensions with rough-in information or Shop Drawings of equipment to be supported.

l.6 WARRANTY

A. Special Warranty on Painted Finishes: Manufacturer's standard form in which manufacturer agrees to repair finishes or replace roof accessories that show evidence of deterioration of factory-applied finishes within specified warranty period.

1. Fluoropolymer 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: 20 years from date of Substantial Completion.

2. l METAL MATERIALS

A. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M, AZ50 coated.

l. Exposed Coil-Coated Finish: Pre-painted by the coil-coating process to comply with ASTM A 755/A 755M. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

a. Two-Coat Fluoropolymer Finish: AAMA 62 l. System consisting of primer and fluoropolymer color topcoat containing not less than 70 percent PVDF resin by weight.

2. Concealed Finish: Pretreat with manufacturer's standard white or light-colored acrylic or polyester-backer finish consisting of prime coat and wash coat, with a minimum total dry film thickness of 0.5 mil.

B. Steel Shapes: ASTM A 36/A 36M, hot-dip galvanized according to ASTM A 123/A 123M unless otherwise indicated.

c. Steel Tube: ASTM A 500, round tube.

D. Galvanized-Steel Tube:

ASTM A 123/A 123M.

ASTM A 500, round tube, hot-dip galvanized according to

E.

2.2

Steel Pipe: ASTM A 53/A 53M, galvanized.

MISCELLANEOUS MATERIALS

General: Provide materials and types of fasteners, protective coatings, sealants, and other miscellaneous items required by manufacturer for a complete installation.

Glass-Fiber Board Insulation: ASTM C 726, thickness as indicated.

Polyisocyanurate Board Insulation: ASTM C 1289, thickness as indicated.

Bituminous Coating: Cold-applied asphalt emulsion complying with ASTM D 1 187.

Fasteners: Roof accessory manufacturer's recommended fasteners suitable for application and metals being fastened. Match finish of exposed fasteners with finish of material being fastened.

Provide nonremovable fastener heads to exterior exposed fasteners. Furnish the following unless otherwise indicated:

1. Fasteners for Zinc-Coated or Aluminum-Zinc Alloy-Coated Steel: Series 300 stainless steel or hot-dip zinc-coated steel according to ASTM A 1 53/A 153M or ASTM F 2329.

2. Fasteners for Aluminum Sheet: Aluminum or Series 300 stainless steel.

3. Fasteners for Copper Sheet: Copper, hardware bronze, or passivated Series 300 stainless steel.

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

F. Gaskets: Manufacturer's standard tubular or fingered design of neoprene, EPDM, PVC, or silicone or a flat design of foam rubber, sponge neoprene, or cork.

G. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane or silicone polymer sealant as recommended by roof accessory manufacturer for installation indicated; low modulus; of type, grade, class, and use classifications required to seal joints and remain watertight.

H. Butyl Sealant: ASTM C 131 1, single-component, solvent-release butyl rubber sealant;

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

I. Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required for application.

2.3 ROOF CURBS

A. Roof Curbs: Internally reinforced roof-curb units capable of supporting superimposed live and dead loads, including equipment loads and other construction indicated on Drawings; with welded or mechanically fastened and sealed corner joints, integral metal cant, and integrally formed deck-mounting flange at perimeter bottom.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to,

a. AES Industries, Inc.

b. Curbs Plus, Inc.

c. Custom Solution Roof and Metal Products.

d. Greenheck Fan Corporation.

e. LM Curbs.

f. Metal lic Products Corp.

g. Milcor Inc.; Commercial Products Group of Hart & Cooley, Inc.

h. Pate Company (The).

i. Roof Products, Inc.

j. Safe Air of Illinois.

k. Thybar Corporation.

I. Vent Products Co., Inc.

B. Size: Coordinate dimensions with roughing-in information or Shop Drawings of equipment to be supported.

C. Loads: Sized for mechanical equipment specified as roof top and requiring curbs.

D. Material: Aluminum-zinc alloy-coated steel sheet, 0.079 inch 14 gauge thick.

1. Finish: Mill phosphatized.

E. Construction:

1. Insulation: Factory insulated with 1-1/2-inch- thick glass-fiber board insulation.

2. Liner: Same material as curb, of manufacturer's standard thickness and finish.

3. Factory-installed wood nailer at top of curb, continuous around curb perimeter.

4. On ribbed or fluted metal roofs, form deck-mounting flange at perimeter bottom to conform to roof profile.

5. Fabricate curbs to minimum height of 12 inches above roofing insulation unless otherwise indicated.

6. Top Surface: Level around perimeter with roof slope accommodated by sloping the deck-mounting flange. See drawings for roof structure slope.

7. Sloping Structure: Structured slope tapered to accommodate roof slope so that top surface of perimeter curb is level.

2.4 EQUIPMENT SUPPORTS

A. Equipment Supports: Internally reinforced metal equipment supports capable of supporting superimposed live and dead loads, including equipment loads and other construction; with welded and sealed corner joints, stepped integral metal cant raised the thickness of roof insulation, and integrally formed deck-mounting flange at perimeter bottom.

1.…