Materials:Firestone Una-Clad

Manufacturer: FIRESTONE BUILDING PRODUCTS CANADA

Contact Address: See Membership List in Section 1.

Product Group: UNA-CLAD SHEET METAL ROOFING

SECTION 07610 - SHEET METAL ROOFING

PART 1 - GENERAL

1.01 DESCRIPTION

A. General

1. Furnish all labor, material, tools, equipment, and services for all preformed roofing as indicated, in accord with the provisions of the Contract Documents. The Metal Roofing Manufacturer will provide all components required for a complete metal roofing system to include panels, panel clips, trim/flashing, fascias, ridge, closures, sealants, fillers and any other required items.

2. Completely coordinate with work of all other trades.

3. See Division 1 for General Requirements.

B. Related work specified elsewhere:

Note to Specifier: Select appropriate Sections below or add other related Sections.

1. Section 05100 - Structural Steel

2. Section 05200 or 05400 - Steel Joists

3. Section 07600 - Flashing and Sheet Metal

1.02 REFERENCES

Note to Specifier: Select paragraphs B, C and D for copper.

B. American Society for Testing and Materials (ASTM)

Note to Specifier: Edit ASTM references below, based on materials specified in Part 2

1. ASTM A653: Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy Coated (Galvanized) by the Hot-Dip Process

2. ASTM B370: Specification for Copper Sheet and Strip for Building Construction

C. Copper Development Association (CDA)

1. CDA 110: General Requirements

D. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA)

1. Architectural Sheet Metal Manual

1.03 QUALITY ASSURANCE

A. Applicable standards:

1. 1996 Low Rise Building Systems Manual, Metal Building Manufacturers Association, Inc., Cleveland, OH, 1996.

2. AISI CF00-01, “A Design Guide for Standing Seam Roof Panels,” American Iron and Steel Institute, 2000.

3. AISI CF97-01, “A Guide for Designing with Standing Seam Roof Panels,” American Iron and Steel Institute, 1997.

4. ASTM A653, “Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process,” American Society for Testing and Materials, 1998.

5. ASTM E1592, “Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference,” American Society for Testing and Materials, 1995.

6. ASTM E1646, “Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference,” American Society for Testing and Materials, 1995.

7. ASTM E1680, “Test Method for Rate of Air Leakage through Exterior Metal Roof Panels Systems,” American Society for Testing and Materials, 1995.

8. Cold-Formed Steel Design Manual, American Iron and Steel Institute, Washington, D.C., 1996.

9. Metal Roofing Systems Design Manual — First Edition, Metal Building Manufacturers Association, Inc., Cleveland, OH, 2000.

10. UL 580, “Tests for Uplift Resistance of Roof Assemblies,” Underwriter’s Laboratories, Inc., 1994.

B. Manufacturer’s qualifications:

1. Manufacturer shall have a minimum of three years experience in manufacturing metal roofing systems. Panels specified in this section shall be produced in a permanent factory environment with fixed-base roll-forming equipment. A letter certifying the manufacturer’s qualifications shall accompany the product material submittals.

C. The Installer shall meet the following minimum criteria:

1. The Project foreman shall be certified by the manufacturer in the proper installation of the specified system and will be present to supervise whenever material is being installed.

2. Have installed five projects of similar scope and magnitude that have been in service for a minimum of two years with satisfactory performance of the roof system.

1.04 SYSTEM PERFORMANCE REQUIREMENTS

A. Performance testing:

1. Metal roofing panel shall be tested in accordance with Underwriters Laboratories, Inc. (UL) Test Method 580 “Tests for Uplift Resistance of Roof Assemblies,” Class 90 rating.

2. Metal roof panel shall be tested in accordance with ASTM E1592-95 for negative loading. Capacity for gauge, span, or loading other than those tested may be determined by interpolating between test values only.

3. Metal roof panel shall have a maximum air infiltration rate of 0.007 cfm/ft2 at a pressure differential of 6.24 psf. when tested in accordance with ASTM E1680-95.

4. Metal roof panel shall have no uncontrollable water leakage at a pressure differential of 6.24 psf. when tested in accordance with ASTM E1646-95.

5. Metal roof panel shall be tested in accordance with Underwriters Laboratories (UL) test method for impact resistance. Materials shall meet or exceed Class 4.

6. Metal roof panel shall be tested in accordance with Underwriters Laboratories (UL) test method for fire resistance. Materials shall meet or exceed Class A.

1.05 DESIGN REQUIREMENTS

A. General:

1. The metal roof system shall be designed by the Manufacturer as a complete system. Members and connections not indicated on the drawings shall be the responsibility of the Contractor. All components of the system shall be supplied or specified by the same manufacturer with a minimum roof slope of 1:3 (3" to 12").

B. Design loads:

Note to Specifier: Select standard in subparagraph below.

1. Design load application shall be in accordance with [IBC] [MBMA] [SBCCI] [UBC] [ASCE-7] [applicable national or local building code].

Note to Specifier: Collateral loads consist of Sprinklers, Mechanical and Electrical Systems, and Ceilings, and shall not be attached to the roof panels.

2. Dead loads:

a. The dead load shall be the weight of the panel. Collateral loads shall be as shown on the contract drawings. Collateral loads shall not be applied to the roof panels.

3. Live loads:

a. The panels and concealed anchor clips shall be capable of supporting a minimum uniform live load of 20 psf.

Note to Specifier: All sources of snow drifting should be clearly identified in the contract documents, i.e. adjacent structures, roof height changes, etc.

4. Snow loads:

a. The design ground snow loads shall be as defined on the contract drawings.

Note to Specifier: The design wind speed must be identified as either ‘fastest mile’ or 3-second gust as appropriate to the applicable code.

5. Wind loads:

a. The design wind speed for the metal roofing system shall be as defined on the contract documents.

6. Thermal effects:

a. Roof panels shall be free to move in response to the expansion and contraction forces resulting from temperature variation, as specified in the MBMA Metal Roofing Systems Design Manual.

Note to Specifier: Rainfall intensity can be found in the Metal Roofing Systems Design Manual.

7. Rainfall intensity:

a. All exterior gutters and downspouts shall be designed for rainfall intensity based upon a 5-year recurrence interval for a five-minute duration. All interior gutters, valleys, and downspouts shall be designed for rainfall intensity based upon a 25-year recurrence interval based on a five-minute duration.

C. Framing members supporting the panel.

Note to Specifier: Select standard in subparagraph below.

1. Any additions/revisions to framing members supporting the panel to accommodate the manufacturer/fabricator’s design shall be the Contractor’s responsibility, and shall be submitted for review and approval by the Engineer of Record. New or revised framing members and their connections shall be designed in accordance with [AISC] [AISI] [SJI] design specifications. Deflection requirements shall be in accordance with the applicable building code, or as a minimum, the provisions of the AISC Steel Design Guide Series 3 — Serviceability Design Consideration for Low-Rise Buildings.

D. Roof panels:

1. Steel panels shall be designed in accordance with the AISI Cold-Formed Steel Design Manual.

2. Deflection requirements shall be in accordance with the applicable building code, or as a minimum, L/180 for roof snow load (but not less than 20/psf).

E. Accessories and their fasteners

1. Accessories and their fasteners shall be capable of resisting the specified design wind uplift forces and shall allow for thermal movement of the roof panel system. Exposed fasteners shall not restrict free movement of the roof panel system resulting from thermal forces, except at designed points of roof panel fixity.

1.06 SUBMITTALS

A. Installation drawings:

1. Submit completed installation drawings and installation details by the manufacturer, to the architect (owner) for review. Do not proceed with manufacture prior to review and architectural approval of installation drawings. Do not use drawings prepared by the architect (owner) for installation drawings.

2. Installation drawings shall show methods of installation, elevations, and plans of roof and wall panels, sections and details, specified loads, flashings, roof curbs, vents, sealants, interfaces with all materials not supplied by the metal roofing system manufacturer, and proposed identification of component parts and their finishes.

B. Physical samples:

1. Submit samples and color chips for all proposed finishes.

a. Submit one 300 mm (12") long sample of panel, including clips.

b. Submit two 75 mm (3") x 125 mm (5") color chip samples in color selected by the architect (owner).

C. Test reports:

1. Submit test report showing that metal panels have been tested in accordance with ASTM E1592-95.

2. Submit test report showing that metal panels have been tested in accordance with ASTM E1646-95.

3. Submit test report showing that metal panels have been tested in accordance with ASTM E1680-95.

1.07 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Delivery:

1. Deliver metal roofing system to job site properly packaged to provide protection against transportation damage.

B. Handling:

1. Exercise extreme care in unloading, storing, and installing metal roofing system to prevent bending, warping, twisting, and surface damage.

C. Storage:

1. Store all material and accessories above ground on well supported platforms that provide a minimum of 1:3 (3" to 12") of slope. Store under waterproof covering. Provide proper ventilation of metal roofing system to prevent condensation build-up between each panel or trim/flashing component.

1.08 WARRANTY REQUIREMENTS

Note to Specifier: Contact Manufacturer for warranty details on painted products.

A. The Contractor shall warrant the materials to be free of faults and defects in accordance with the General Conditions, except that the warranty shall be extended by paint manufacturer’s standard multi-year warranty. The warranty shall be in writing and shall be signed by the manufacturer.

PART 2 - PRODUCTS

2.01 MANUFACTURER

A. Firestone Metal Products / UNACLAD

Note to Specifier: Fill in other manufacturers below or require other manufacturers to submit information which supports their products for the Architect's review prior to bidding or during construction; delete paragraph below if prior approvals or substitutions will not be considered.

B. Other manufacturers seeking approval of their products must comply with requirements of the Instructions to Bidders (AIA Document A701), Paragraph 3.3 prior to bidding.

C. Other manufacturers seeking approval of their products must comply with requirements of Section 01600 [Other] during construction.

2.02 ROOFING TYPE

Note to Specifier: Select steel, or copper roofing panels in paragraph below.

A. UNA-CLAD UC-1 Snap-on batten, architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

B. UNA-CLAD UC-2 Snap-on batten, architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

C. UNA-CLAD UC-3 Double-lock, architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

D. UNA-CLAD UC-4 No-clip snap-lock standing seam roofing system, roll formed [steel] [copper] roofing panels.

E. UNA-CLAD UC-5 Batten-lock standing seam roofing system, roll formed [steel] [copper] roofing panels.

F. UNA-CLAD UC-6 Double-lock with concealed clip assembly standing seam roofing system, roll formed [steel] [copper] roofing panels.

G. UNA-CLAD UC-7 Snap-on batten thin line standing seam roofing system, roll formed [steel] [copper] roofing panels.

H. UNA-CLAD UC-8 High profile snap-on batten standing seam roofing system, roll formed [steel] [copper] roofing panels.

I. UNA-CLAD UC-9 Self-locking snap-on architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

J. UNA-CLAD UC-11 Self-locking snap-on integral standing seam roofing system, roll formed [steel] [copper] roofing panels.

K. UNA-CLAD UC-14 Concealed clip, Snap-lock standing seam roofing system, roll formed [steel] [copper] roofing panels.

L. UNA-CLAD 1.75" FF (field fabricated) No-clip snap-lock standing seam roofing system, field fabricated roll formed [steel] [copper] roofing panels.

M. UNA-CLAD 1.5" Double-Lock FF (field fabricated) architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

N. UNA-CLAD 2.0" Double-Lock FF (field fabricated) architectural standing seam roofing system, roll formed [steel] [copper] roofing panels.

2.03 PANEL MATERIALS AND FABRICATION

Note to Specifier: Select paragraph below for painted steel panel.

A. Steel Panels: ASTM A653M-02, G90 (lock-forming quality), extra smooth, tension-leveled, galvanized steel, minimum spangle.

Note to Specifier: Select proper gauge in subparagraph below.

1. Thickness: [22] [24] gauge.

Note to Specifier: Select paragraph below for copper panels.

A. Copper Panels: ASTM B370

Note to Specifier: Select thickness in subparagraph below.

1. Thickness: [16] [20] ounce.

Note to Specifier: Select thickness in subparagraph below.

1. Thickness: [24] [22] gauge.

B. Form roofing panels in longest practical lengths, true to shape, accurate in size, square, and free from distribution or manufacturing defects.

1. Seam Height: Minimum of 38 mm (1½").

Note to Specifier: Select seam spacing in subparagraph below.

2. Seam Spacing: 235 mm [9¾"] 445 mm [17¾"] (alternative seam spacing available).

C. (Optional) Seams shall have a factory applied integral seam sealant in leg of panel.

2.04 FINISHES

Note to Specifier: Select paragraphs A and B below for painted finish.

A. Coil-Coated or Spray-Applied Fluorocarbon Resin

Note to Specifier: Custom colors are available but are subject to an additional cost; contact manufacturer for details.

1. Color: Selected by Architect/Engineer from manufacturer’s standard colors.

Note to Specifier: Verify number of coats with manufacturer, dependent on color selection.

2. Number of Coats: [2-coat] [3-coat] [4-coat].

3. Provide factory applied strippable plastic film for protection during fabrication and installation.

Note to Specifier: Anodized colors differ in cost; custom colors may be available at an additional cost; contact manufacturer for details.

1. Color: Selected by Architect/Engineer from manufacturer’s standard colors.

2. Film Thickness: Test Method ASTM B137; by weight.

Note to Specifier: Select either Class I or Class II in subparagraph below.

a. Class I, 0.7 mils (minimum).

b. Class II, 0.25 (minimum) to 0.7 mils.

3. Provide factory applied strippable plastic film for protection during fabrication and installation.

2.05 ACCESSORIES

A. Fasteners: Non-corrosive, 25 mm (1"), UC self-tapping screws for plywood or metal substrate.

B. Underlayments

1. Non-asphaltic fiberglass-based underlayment meeting ASTM D146, D1922 and D4869 for wood decks only with slopes 1:3 (4" in 12") and greater.

Note to Specifier: The roofing manufacturer recommends a waterproof membrane such as "Ice & Water Shield" be used in areas subject to moisture infiltration, e.g. eaves, valleys and similar areas.

2. Waterproof Membrane: ASTM D1970, self-adhering rubberized sheet membrane required for slopes between 1:6 (2" in 12") and up to but not including 1:3 (4" in 12"). Refer to RGC Guarantee Standard D1.3.4, Section 2.1.4.

2.06 MISCELLANEOUS MATERIALS

A. Fasteners:

Note to Specifier: If exposed — fastener color must match panel, trim, or accessories. Fastener color must be specified.

1. Fasteners for steel roof panels shall be zinc-coated steel, corrosion resisting steel, or nylon-capped steel, type and size specified below, or as otherwise, approved for the applicable requirements. Fasteners for structural connections shall provide both tensile and shear ultimate strengths of not less than 750 pounds per fastener. Fasteners for accessories shall be the manufacturer’s standard. Exposed roof fasteners shall be sealed or have sealed washers on the exterior side of the covering to waterproof the fastener penetration. Washer material shall be compatible with the screw head; have a minimum diameter of 9 mm (3/8") for structural connections; and gasket portion of fasteners or washers shall be neoprene or other equally durable elastomeric material.

B. Components:

1. Components shall be compatible with the roof panel furnished. Flashing, trim, metal closure strips, caps, gutters, downspouts, roof curbs, and similar metal components shall not be less than the minimum thickness specified by the panel Manufacturer. Exposed metal components shall be finished to match the panels or trim, as furnished. Molded closure strips shall be closed-cell or solid-cell synthetic rubber or neoprene, or polyvinyl chloried or metal pre-molded to match configuration of the covering and shall not absorb or retain water.

C. Sealants:

1. All tape sealant is to be a pressure sensitive, 100 percent solid, sealing tape with a release paper backing. Provide permanently elastic, non-sagging, non-toxic, non-staining tape sealant approved by the panel Manufacturer.

2. The panel Manufacturer shall approve all joint sealant that will come into contact with the panel.

2.07 FABRICATION

A. Panels shall be produced by a Manufacturer meeting the requirements of section 1.02B.

B. Fabricate trim, flashing, and accessories to Manufacturer’s specified profiles.

2.08 PREFABRICATED CURBS AND EQUIPMENT SUPPORTS

A. General

1. Provide the Manufacturer with the dimensions, weights, and model number of the units to be supported by the curb(s).

Note to Specifier: If curb finish is to match roof panel finish, the finish must be specified.

B. Fabricate curbs of structural quality aluminum, Acrylume®, or hot-dipped galvanized sheet. Curbs shall have welded joints unless a two-piece curb is required. Provide integral base plates and water diverters/crickets. Front base plate shall be extended up-slope from the beginning of the water diverter. Curbs shall be designed for a compatible installation with the panel system.

C. Curbs shall be constructed to match the roof slope and provide a mounting surface as required by the rooftop unit manufacturer.

D. Submit roof curb manufacturer’s shop drawings to panel Manufacturer for approval before fabrication of curbs.

E. Any curb structural support system shall allow proper thermal movement of the curb with the roofing system.

2.09 PREFABRICATED PIPE FLASHINGS

A. Pipe flashings shall provide a weather-tight joint at projections through the roof, taking into account the thermal movement of the roof and the service temperature of the projection. Pipe flashings shall have an aluminum-flanged base ring.

PART 3 - EXECUTION

3.01 SURFACE CONDITIONS

A. Examination:

1. The Contractor shall verify installed work of other trades that such work is complete to a point where the roofing system installation may commence.

2. Verify that the substructure installation is in accordance with the approved shop drawings and panel Manufacturer’s requirements. This specifically includes verifying that secondary structural members and/or decking are installed to meet performance requirements. Coordinate with panel Manufacturer to ensure that the substructure is installed to accommodate the appropriate clip spacing.

B. Discrepancies:

1. In event of discrepancy, notify the architect (owner).

2. Do not proceed with installation until discrepancies have been resolved.

C. Verify that roof openings, curbs, pipes, sleeves, ducts, vents, and other penetrations through roof substrate are complete.

3.02 INSTALLATION

A. Install the panel in accordance with Manufacturer’s instructions and approved installation drawings.

B. Install the panel so that it is weather-tight and allows for thermal movements.

C. Locate and space all exposed fasteners in accordance with the panel Manufacturer’s recommendations. Use proper torque settings to obtain controlled uniform compression for a positive seal without rupturing the neoprene washer.

D. Avoid placing pipe penetrations through the panel seams.

E. Do not allow panels or trim to come into contact with dissimilar materials (i.e. copper, lead, graphite, treated lumber, mortar, etc). Water run-off from these materials is also prohibited.

F. Comply with the panel Manufacturer’s approved installation drawings and instructions.

G. Field cutting of panels, trim, and/or flashing shall be accomplished by hand or electric shears. At no time shall a hot saw be used.

Note to Specifier: A certain amount of waviness called ‘oil canning’ is inherent in any product manufactured from coiled sheet material. The amount of ‘oil canning’ can vary due to several factors: uneven substrates, the width of the panel, weather conditions, etc. Minor ‘oil canning’ of a panel does not affect its structural integrity and is not sufficient cause for rejection.

3.03 ADJUSTING AND CLEANING

A. Repair panels with minor damage.

B. Remove panels damaged beyond repair and replace with new panels to match adjacent undamaged panels.

C. Clean exposed panel surfaces promptly after installation in accordance with recommendations of panel and coating manufacturers.

D. Remove protective film immediately after installation.

APPLICATION DETAILS

The details listed provide metal panel installation information and the fabrication of metal flashing details for standing seam metal roof systems and proprietary metal roof systems. More specific details are available from metal roof panel manufacturers. RGC Guarantee Standards for metal roofing systems are to be used in conjunction with this section.

E1.7.1 Underlayment / Modified Bitumen Ice Dam Protection

E1.7.2 Modified Bitumen Underlayment / Ice Dam Protection

E1.7.3 Eave & Gable Flashing for Standing Seam Systems

E1.7.4 Eave & Gable Protection for Proprietary Systems

E1.7.5 Metal Valley - Hooked Flashing

E1.7.6 Metal Valley - Unhooked Flashing

E1.7.7 Roof-to-Wall Flashing

E1.7.8 Equipment Support Stand / Pipe Flashing

E1.7.9 Equipment Support Stand, Pipe Flashing Split Panel Detail

E1.7.10 Curb for Rooftop Equipment

E1.7.11 Ridge / Hip Cap Flashing

E1.7.12 Notched Ridge / Hip Cap Flashing