074000 Roofing and Siding Panels (VA-TIL)-CDr2 REVISED-23-04-13 Pat Bldg.pdf

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SECTION 07 40 00

ROOFING AND SIDING PANELS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies ventilated architectural standing-seam metal roof panels installed over existing asphalt roofing on existing wood-framed construction and as shown on contract documents; and metal wall panels installed over existing sheathing and framing.

1.2 RELATED WORK

A. Section 07 92 00, JOINT SEALANTS: Field-applied sealants not otherwise specified in this Section.

B. Section 09 06 00, SCHEDULE FOR FINISHES: Color and texture of finish.

1.3 QUALITY CONTROL

A. Manufacturer’s Qualifications: Provide metal roof and wall panel products of a manufacturer regularly engaged for not less than five

(5) years in the fabrication of metal panels and matched attachment system of the type and design indicated. Panels and attachment system shall be shop manufactured and rated to withstand the weather conditions for this location. Fasteners shall be designed for the depth and interval of attachment to existing roof structure.

B. Installer: A firm with three (3) years of successful experience with installation of roofing and siding panels of type and scope equivalent to Work of this Section. Submit installer qualifications.

C. Delegated design and analysis using wind loading for Risk Category III, Basic Design Wind Speed, 123 mph (interpolated), sealed by a Maryland

Professional Engineer for the approved proprietary Roof attachment system and panel configuration.

D. Delegated design for snow guards including structural analysis and layout.

E. Preinstallation Conference: Conduct conference at Project site.

1. Meet with Owner, Architect, metal roof panel Installer, metal roof panel manufacturer's representative, and installers whose work interfaces with or affects metal roof panels including installers of roof accessories and roof-mounted equipment.

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

3. Review methods and procedures related to metal roof panel installation, including manufacturer's written instructions.

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Sustainable Design Submittals, as described below:

1. Postconsumer recycled content as specified in PART 2 - PRODUCTS.

C. Samples: Metal panel, 152 mm (6 inch) square, showing finish, each color and texture.

D. Shop Drawings:

1. Roof and wall panels, showing details of construction and installation. Show thickness and kind of material, closures, flashing, fastenings and related components and accessories. Show interfaces and relationships to work at other trades and continuity with adjacent thermal, weather, air and vapor barriers.

2. Design Analysis and Wind Loading for Risk Category III, Basic Design Wind Speed, 123 mph (interpolated), sealed by a Maryland

Professional Engineer for the Proprietary Roof attachment system and panel configuration.

3. Snow guard systems for manufacturer’s metal roofing system.

E. Manufacturer's Literature and Data: Roof and wall panels F. Fire Test Report: Report of fire test by recognized testing laboratory for fire rating specified, showing details of construction.

G. Manufacturer’s Certificates: Indicating manufacturer’s qualifications specified.

H. Installer qualifications.

I. Manufacturer warranty.

1.5 QUALITY CONTROL

A. Approval by Contracting Officer Representative (COR) is required of products of proposed manufacturer.

B. Certify manufacturer has five (5) years continuous documented experience in fabrication of metal roofing and siding panels.

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C. Source: For each material type required for work of this section, provide primary materials, which are products of one manufacturer.

Provide secondary or accessory materials, which are acceptable to manufacturers of primary materials.

D. Installer: A firm with a minimum of three (3) years’ experience in type of work required by this section and which is acceptable to manufacturers of primary materials.

1.6 WARRANTY

A. Construction Warranty: Comply with FAR clause 52.246-21 “Warranty of

Construction”.

B. Manufacturer Warranty: Manufacturer shall warranty their metal roofing and wall panels for a minimum of thirty (30) years from the date of installation and final acceptance by the Government. Submit manufacturer warranty. REVISED 23-04-14

C. Installer Warranty: Installer's warranty signed by Installer, as follows.

1. Scope of Warranty: Work of this Section.

2. Warranty Period: 2 years from date of completion.

D. Warranty on Panel Finishes: Manufacturer’s shall warrant their roofing and wall panel finish and provide standard agreement 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 D2244.

b. Chalking in excess of a No. 8 rating when testing according to

ASTM D4214.

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

2. Finish Warranty Period: Thirty (30) years from date of installation and final acceptance by the COR. REVISED 23-04-14.

1.7 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extend referenced. The publications are referenced in the text by the basic designation only.

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B. American Architecture Manufacturers Association (AAMA):

621 .................... Voluntary Specifications for High Performance

Organic Coatings on Coil Coated Architectural

Hot Dipped Galvanized (HDG) and Zinc-Aluminum

Coated Steel Substrates

C. ASCE/SEI 7-16 Minimum Design Loads for Buildings and Other

Structures.

D. ASTM International (ASTM):

A792/A792M ............ Standard Specification for Steel Sheet, 55 %

Aluminum-Zinc Alloy-Coated by the Hot-Dip

Process

A755/A755M ............. Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and

Prepainted by the Coil-Coating Process for

Exterior Exposed Building Products

D2244 .................. Calculation of Color Tolerances and Color

Differences from Instrumentally Measured Color

Coordinates

D4214 .................. Test Methods for Evaluating the Degree of

Chalking of Exterior Paint Films

E283 ................... Test Method for Determining Rate of Air Leakage

Through Exterior Windows, Curtain Walls, and

Doors Under Specified Pressure Differences

Across the Specimen

E331 ................... Test Method for Water Penetration of Exterior

Windows, Skylight, Doors, and Curtain Walls by

Uniform Static Air Pressure Difference

E1514 .................. Standard Specification for Structural Standing

Seam Steel Roof Panel Systems

E1592 .................. Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by

Uniform Static Air Pressure Method

E1646 .................. Test Method for Water Penetration of Exterior

Metal Roof Panel Systems by Uniform Static Air

Pressure Difference

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E1980 .................. Calculating Solar Reflectance Index of

Horizontal and Low-Sloped Opaque Surfaces

E. Cool Roof Rating Council (CRRC):

CRRC-1 Product Rating Program Manual

Sheet Metal & Air Conditioning Contractors’ National Association

(SMACNA): Architectural Sheet Metal Manual

F. Underwriters Laboratories (UL):

580 .................... Tests for Uplift Resistance of Roof Assemblies

Fire Resistance Directory

PART 2 - PRODUCTS

SPEC WRITER NOTE: Delete this entire paragraph if roof panels are not used.

2.1 PERFORMANCE REQUIREMENTS ROOF PANELS

A. Energy Performance: Provide roof panels according to one of the following when tested according to CRRC-1:

1. Three-year, aged solar reflectance of not less than 0.55 and emissivity of not less than 0.75.

2. Three-year, aged Solar Reflectance Index (SRI) of not less than 64 when calculated according to ASTM E1980.

B. Structural Performance: Provide metal panel systems capable of withstanding the effects of the following loads, based on testing according to ASTM E1592.

1. Wind Loads: ASCE 7-16 Chart for Wind Loading, Risk Category III.

2. As the metal roof panel system differs by manufacturer, the design is delegated to the contractor. Design will be done by an engineer certified in the State of Maryland. Shop drawings will be provided showing adequate anchorage to the existing roof framing to safely resist the design loading. The contractor is not responsible for the integrity of the roof frame, but is responsible for the connection and integrity of the roofing system to the frame.

Deflection Limits: For wind loads, no greater than 1/180 of the span.

C. Water Penetration under Static Pressure: No water penetration when tested according to ASTM E1646 at the following test-pressure difference:

1. Test-Pressure Difference: 958 Pa (20 pound force/square foot).

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D. Hydrostatic-Head Resistance: No water penetration when tested according to ASTM E2140.

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

1. Uplift Rating: UL 90: Continuous wind pressure of 90 pounds per square foot. Design using ASCE 7-16 design wind load of 123 mph, building Risk Category III.

F. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes by preventing buckling, opening of joints, overstressing of components, failure of joints sealants, failure of connections, and other detrimental effects. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change (Range): 67 degrees C (120 degrees F), ambient;

100 degrees C (180 degrees F), material surfaces.

2.2 PERFORMANCE REQUIREMENTS FOR WALL PANELS

A. Structural Performance: Provide metal panel systems capable of withstanding the effects of the following loads, based on testing according to ASTM E1592.

1. Wind Loads: As indicated.

2. Other Design Loads: As indicated.

3. Deflection Limits: For wind loads, no greater than 1/180 of the span.

B. Air Infiltration: Air leakage of not more than 0.3 liter/second per square meter (0.06 cfm/square foot) when tested according to ASTM E283 at the following test-pressure difference:

1. Test-Pressure Difference: 75 Pa (1.57 pound/square foot).

C. Water Penetration under Static Pressure: No water penetration when tested according to ASTM E331 at the following test-pressure difference:

1. Test-Pressure Difference: 75 Pa (1.57 pound/square foot).

D. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes by preventing buckling, opening of joints, overstressing of components, failure of joints sealants, failure of connections, and other detrimental effects. Base calculations on

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1. Temperature Change (Range): 67 degrees C (120 degrees F), ambient;

100 degrees C (180 degrees F), material surfaces.

2.3 SHEET STEEL

A. Minimum 0.7 mm (0.0236 inch) thick for wall and roof panels.

B. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M, Class AZ50 coating designation, Grade 50 (Class AZM150 coating designation, Grade

340) prepainted by the coil-coating process to comply with ASTM A

755/A 755M; structural quality.

2.4 FASTENERS

A. Fasteners for Steel Panels: Galvanized steel.

B. Fasteners of size, type and holding strength as recommended by panel manufacturer.

2.5 FABRICATION

A. General: Provide factory-formed metal 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 in side laps. Include clips, cleats, pressure plates, and accessories required for weathertight installation.

1. Steel Panel Systems: Unless more stringent requirements are indicated, comply with ASTM E 1514.

B. Roof Panels: Factory-formed symmetrical panels with vertical ribs at panel edges and flat pan between ribs; designed for sequential installation in either direction by mechanically attaching panels to supports using concealed clips located under one side of panels and engaging opposite edge of adjacent panels, and mechanically seaming panels together utilizing a seam cap, and configured to enable future replacement of individual panels without disturbing adjacent panels.

1. Configuration: Symmetrical.

2. Surface: Smooth, flat finish.

3. Exposed Coil-Coated Finish: 2-Coat Fluoropolymer.

a. Color: As selected by Owner from manufacturer's standard colors.

4. Joint Type: Field mechanically seamed.

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5. Seam Cap: Match panel material and finish; provide with two rows of integral factory hot-applied sealant.

6. Panel Pan Configuration: Pencil Ribbed.

7. Panel Seam Height: Not less than 34.9 mm (1-3/8 inch.

8. Panel Coverage: 406 mm (16 inches).

C. Above Sheathing Ventilation (ASV) Clips for Existing Shingle Recover:

1. Fixed clips minimum 100 mm (8 inches) long configured to hold metal panel in place 19 mm (3/4 inch) above and aligned with existing shingle substrate, spaced as required to meet performance requirements; and with clip bearing plate where required.

a. Material: 1.59 mm (0.062 inch) nominal thickness, zinc-coated (galvanized) or aluminum-zinc alloy-coated steel sheet.

D. Gutters: (Replace gutters as indicated) Formed from same material as roof panels. Match profile of gable trim, complete with end pieces, outlet tubes, and other special pieces as required. Fabricate in minimum 2400 mm (96 inch) long sections, of size and metal thickness according to SMACNA's "Architectural Sheet Metal Manual." Furnish gutter supports spaced a maximum of (900 mm (36 inches) o.c., fabricated from same metal as gutters. Provide wire ball strainers of compatible metal at outlets. Finish gutters to match metal roof panels.

E. Downspouts: (Replace where indicated) Formed from same material as roof panels. Fabricate in 3 m (10 ft) long sections, complete with formed elbows and offsets, of size and metal thickness according to SMACNA's

"Architectural Sheet Metal Manual." Finish downspouts to match gutters.

F. Pipe Penetration Flashing: Premolded EPDM pipe collar with flexible aluminum ring bonded to base and stainless steel pipe clamp to secure collar to pipe.

G. Snow Guards: Prefabricated, noncorrosive units designed to be installed without penetrating metal roof panels, and complete with predrilled holes, clamps, or hooks for anchoring.

1. Seam-Mounted, Bar-Type Snow Guards: Aluminum rods or bars held in place by stainless-steel clamps attached to vertical ribs of standing-seam metal roof panels.

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a. Aluminum Finish: High-performance coating to match metal roof panels.

2. Approved manufacturers:

a. S5!, ColorGard.

b. Alpine, SnowMax.

c. Equivalent product, subject to approval of COR.

H. Wall Panels: Flush-Profile, Concealed-fastener, solid panels formed with vertical panel edges and flat pan between panel edges; with flush joint between panels.

1. Surface: Smooth, flat finish.

2. Exposed Coil-Coated Finish: Two-coat fluoropolymer.

a. Color: As selected by Architect from manufacturer's full range.

3. Panel Profile: Flush flat pan.

4. Panel Coverage: 305 mm (12 inches).

5. Panel Height: 25 mm (1 inch).

2.6 FINISH

A. For wall and roof panels, provide finishes as follows for face sheets.

Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers’ written instructions.

B. Energy Performance: Provide roof panels with solar reflectance index not less than 20 when calculated according to ASTM E1980 based on testing identical products by a qualified testing agency.

C. Provide finishes for steel face sheets as follows. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers’ written instructions.

1. Two-Coat Fluoropolymer: AAMA 620. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat, for coastal environments.

2. Concealed Finish: Apply pretreatment and 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 3 mm (0.5 mil).

PART 3 - EXECUTION

3.1 INSTALLATION

A. General: Install panels in accordance with the manufacturer's approved erection instructions and diagrams, except as specified otherwise.

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B. Install panels in full and firm contact with supports and with each other at side and end laps.

C. Where panels are cut in the field, or where factory applied coverings or coatings are abraded or damaged in handling or installation, make finish repairs with material of the same type and color as the weather coating, before being installed.

D. Seal cut ends and edges, including those at openings through the sheets.

E. Correct defects or errors in the materials in a manner approved by the

COR.

F. Replace defective materials which cannot be corrected with nondefective material.

G. Provide molded closure strips where indicated and whenever sheets terminate with open ends after installation.

H. Wall Panels:

1. Apply panels with the configuration in a vertical position.

2. Provide panels in full heights.

3. Seal side and end laps with joint sealing material.

4. Flash and seal walls at the base, at the top, around windows, door frames, framed louvers, and other similar openings. Install closure strips, flashings, and sealing material in an approved manner that will assure complete weather tightness.

I. Roof Panels:

1. Apply roofing panels with the configurations parallel to the slope of the roof. Provide roofing panels in full lengths from ridge (or ridge panel) to eaves or top to eaves on shed roofs, with no transverse joints except at the junction of ventilators, curbs, skylights, chimneys and similar openings.

a. Fasten metal roof panels to supports with concealed clips at each standing-seam joint at location, spacing, and with fasteners recommended by manufacturer.

2. Flash and seal the roof at the ridge, at eaves and rakes, at projections through the roof, and elsewhere as necessary.

3. Install closure strips, flashing, and sealing material in a manner that will assure complete weather tightness.

J. Flashing:

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1. Provide flashing and related closures and accessories in connection with the preformed metal panels as indicated and as necessary to provide a watertight installation.

2. Implement details of installation, which are not indicated, in accordance with the panel manufacturer's printed instruction and details, or the approved shop drawings.

3. Allow for expansion and contraction of flashing.

4. Insure that fall arresting accessories are flashed and watertight.

K. Fasteners:

1. Space fasteners in accordance with the manufacturer's recommendations, and as necessary to withstand the design loads calculated.

2. Install fasteners in valleys or crowns as recommended by the manufacturer of the panel being used.

3. Install fasteners in straight lines within a tolerance of 13 mm (1/2-inch) in the length of a bay.

4. Drive exposed penetrating type fasteners normal to the surface, and to a uniform depth to seat gasketed washers properly, and drive so as not to damage factory applied coating.

5. Exercise care in drilling pilot holes for fastenings to keep drills perpendicular and centered in valleys, or crowns, as applicable.

After drilling, remove metal filings and burrs from holes prior to installing fasteners and washers. Do not torque fasteners to exceed values recommended by the manufacturer.

6. Remove panels deformed or otherwise damaged by over-torqued fastenings, and provide new panels.

7. Remove metal shavings and filings from roofs on completion to prevent rusting and discoloration of the panels.

L. Gutters: Join sections with riveted and soldered or lapped, riveted, and sealed joints. Attach gutters to eave with gutter hangers spaced not more than 914 mm (36 inches) o.c. using manufacturer's standard fasteners. Provide end closures and seal watertight with sealant.

Provide for thermal expansion.

1. Line existing gutters with membrane roofing material (or better) to insure waterproofing and unobstructed flow of rainwater.

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M. Downspouts: Join sections with telescoping joints. Provide fasteners designed to hold downspouts securely 25 mm (1 inch) away from walls;

locate fasteners at top and bottom and at approximately 1500 mm (60 inches) o.c. in between.

N. Provide elbows or drainage system connectors at base of downspouts as indicated on approved shop drawings.

O. Pipe Flashing: Form flashing around pipe penetration and metal roof panels. Fasten and seal to metal roof panels as recommended by manufacturer.

P. Bar-Type Snow Guards: Attach bar supports to vertical ribs of standing-seam metal roof panels with clamps or set screws in array recommended by snow guard manufacturer. Do not use fasteners that will penetrate metal roof panels.

3.2 FIELD QUALITY CONTROL

A. Manufacturer's Technical Representative: Engage a qualified manufacturer's technical representative acceptable to Owner for a minimum of 2 full-time days on site, per 40-hour crew week, to perform substrate examination, interim observations, and final roof inspections, and to prepare reports.

B. Remove and replace applications of metal roof panels where inspections indicate that they do not comply with specified requirements.

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

D. Inspection. ADDED 23-04-14

1. Manufacturer inspection services: By manufacturer's technical representative, to report maintenance responsibilities to owner necessary for preservation of owner's warranty rights. The cost of manufacturer's inspections is included in the contract sum.

2. Inspections to occur in following years: 2, 5, 10,15, 20 and 25 following completion.

E.

3.3 PROTECTION AND CLEANING

A. Protect panels and other components from damage during and after erection, and until project is accepted by the COR.

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B. After completion of work, all exposed finished surfaces of panels are to be cleaned of soil, discoloration and disfiguration. Touch-up abraded surfaces of panels.

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