EXHIBIT_C_–_Standing_Seam_Metal_Roof.pdf

Alameda County 224 West Winton Roof Replacement

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SECTION 07 41 13

METAL ROOF PANELS

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Standing seam metal roofing system.

B. Standing seam metal roofing accessories.

C. Metal roofing accessories.

1.2 RELATED SECTIONS

A. Section 07 22 16 – Roof Insulation

B. Section 07 55 00 – Modified Bituminous Membrane Roofing

C. Section 07 62 00 – Sheet Metal Flashing and Trim

1.3 REFERENCES

A. ASTM A 792/A 792M - Standard Specification for Steel Sheet, 55% Aluminum-Zinc Alloy- Coated by the Hot-Dip Process.

B. ASTM A 875 - Standard Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process

C. ASTM B 209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

D. ASTM D 3575 - Standard Test Methods for Flexible Cellular Materials made from Olefin Polymers.

E. ASTM E 84 - Standard Test for Surface Burning Characteristics of Building Materials.

F. ASTM E 283 - Standard Test Method for Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen.

G. ASTM E 331 - Standard Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

H. ASTM E 1592 - Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference.

I. ASTM E 1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference.

J. ASTM E 1680 - Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel Systems.

K. ASTM E 2140 - Standard Test Method for Water Penetration of Metal Roof Panel Systems by Static Water Pressure Head.

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L. ASCE 7 - Minimum Design Loads for Buildings and Other Structures.

M. FM 4470 Approval Standard for Class 1 Panel Roofs.

N. FM 4471 - Class 1 Panel Roof; Factory Mutual Research Corporation.

O. UL 263 - Fire Tests of Building Constructions and Materials.

P. UL 580 - Standard for Tests for Uplift Resistance of Roof Assemblies.

Q. UL 790 - Standard Test Methods for Fire Tests of Roof Coverings.

R. UL 1897 - Uplift Test for Roof Covering Systems.

S. ICC-ES AC166 - Test Procedure for Wind Driven Rain Resistance of Metal Roof Coverings.

T. SMACNA - Architectural Sheet Metal Manual.

U. National Coil Coating Association (NCCA)

V. NRCA - The NRCA Roofing and Waterproofing Manual.

1.4 DESIGN / PERFORMANCE REQUIREMENTS

A. Standing Seam Roofing System: R-Mer Shield

1. Thermal Expansion and Contraction:

a. Completed metal roofing and flashing system shall be capable of withstanding expansion and contraction of components caused by changes in temperature without buckling, producing excess stress on structure, anchors or fasteners, or reducing performance ability.

b. Design temperature differential shall be not less than 200 degrees F.

c. Interface between panel and toprail/clip shall provide for unlimited thermal movement in each direction along the longitudinal direction.

d. Location of metal roofing rigid connector shall be at roof ridge unless otherwise approved by the manufacturer. Metal ridge connector may require design as per job conditions by specified manufacturer.

2. Uniform Wind Load Capacity:

a. Installed roof system shall withstand negative (uplift) design wind loading pressures complying with the following criteria.

1) Design Code: ASCE 7, Method 2 for Components and Cladding.

2) Safety Factor: 1.67 after any load reduction or material stress increase.

b. ASTM E 1592: Capacity shall be determined using pleated airbag method in accordance with ASTM E 1592, testing of sheet metal roof panels. Allowable safe working loads shall be determined by dividing the ultimate test load by the safety factor specified above.

c. FM 4471: Submit test report for negative wind uplift pressures no less than that specified. Roof system must have approval over the substrate specified.

3. Uniform Positive Load Capacity.

a. Dead Load: Loading of the roof structure, due to tear off of existing, and/or installation of new roofing materials shall not exceed the present loading due to weight of the existing roofing system.

4. ASTM E 1680: Static pressure air infiltration (roof panels):

a. Pressure Leakage Rate:

1) 1.57 PSF 0.002 cfm/sq.ft.

2) 6.24 PSF 0.004 cfm/sq.ft.

3) 12.0 PSF 0.014 cfm/sq.ft.

5. ASTM E 1646: Static pressure water infiltration (roof panels):

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a. Pressure Result:

1) 5 Gal. /Hr. per S.F. and Static No Leakage

2) Pressure of 12.0 Psf for 15 minutes

6. Capacities for gauge, span or loading other than those tested may be determined by interpolation of test results within the range of test data. Extrapolations for conditions outside test range are not acceptable.

1.5 SUBMITTALS

A. Submit under provisions of Section 01 30 00 - Administrative Requirements.

B. Product Data: Submit product data, test reports, and certifications in accordance with quality assurance and performance requirements specified herein.

C. Design Loads: Submit manufacturer's minimum design load calculations according to ASCE 7, Method 2 for Components and Cladding. In no case shall the design loads be taken to be less than those specified herein.

D. Specimen Warranty: Provide an unexecuted copy of the 30 year No Dollar Limit water tight warranty covering every part of the Standing Seam Roofing system specified for this project.

Warranty sample shall be sole source including modified bitumen, ANSI-SPRI ES-1 coping and edge metal, metal roof panels, and soffit panels.

E. Dead Load Evaluation: Provide documentation from a licensed structural engineer of a structural evaluation of the roof structure and its suitability for the new imposed roofing loads.

F. Any material submitted as equal to or better than the specified material must be accompanied by a report signed and sealed by a professional engineer licensed in the state in which the installation is to take place. This report shall show that the submitted equal meets the Design and Performance criteria in this specification. Material substitutions may only be submitted by prime bidding contractors. Substitution requests submitted without a licensed engineer stamp or by non-prime bidding contractors will be rejected for non-conformance.

G. Manufacturer’s Contractor Authorization: Provide written authorization acknowledgement from the roofing system manufacturer that the applicator is currently authorized to install the specified roof system and able to provide the specified warranty. Manufacturer’s acknowledgement letter must be dated within one (1) year of the bid date.

H. Shop Drawings: Prepared specifically for this project; showing dimensions of metal roofing and accessories, fastening details and connections and interface with other products. Shop drawings must be provided by manufacturer and reviewed and stamped by a CA structural engineer.

I. LEED Submittals: Provide documentation of how the requirements of Credit will be met:

1. List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.

2. Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.

J. Selection Samples: For each finish product specified, two complete sets of samples representing manufacturer's full range of available colors and textures.

K. Verification Samples: For each finish product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and textures.

L. Manufacturers Field Inspections: Provide a notarized statement from the roofing system

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07 41 13 -4 manufacturer, signed by an officer of the corporation stating that the roof system manufacturer will provide filed inspections three times a week during the entire period of installation until all construction is completed and to be performed by a full time employee of the manufacturer at no additional cost to the owner. See (3.8) for full requirements.

M. Closeout Submittals:

1. Provide manufacturer's maintenance instructions that include recommendations for periodic checking and maintenance of installed roof system.

2. Provide executed copy of manufacturer's warranty.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: Certified and approved installer of the sheet metal roofing manufacturer.

B. Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.

1. Finish areas designated by Architect.

2. Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.

3. Refinish mock-up area as required to produce acceptable work.

1.7 PRE-INSTALLATION CONFERENCE

A. Convene a pre-roofing conference approximately two weeks before scheduled commencement of roofing system installation and associated work.

B. Require attendance of installers of deck or substrate construction to receive roofing, installers of rooftop units and other work in and around roofing which must precede or follow roofing work including mechanical work, Architect, Owner, roofing system manufacturer's representative.

C. Objectives include:

1. Review foreseeable methods and procedures related to roofing work, including set up and mobilization areas for stored material and work area.

2. Tour representative areas of roofing substrates, inspect and discuss condition of substrate, roof drains, curbs, penetrations and other preparatory work.

3. Review structural loading limitations of deck and inspect deck for loss of flatness and for required attachment.

4. Review roofing system requirements, Drawings, Specifications and other Contract

Documents.

5. Review and finalize schedule related to roofing work and verify availability of materials, installer's personnel, equipment and facilities needed to make progress and avoid delays.

6. Review required inspection, testing, certifying procedures.

7. Review weather and forecasted weather conditions and procedures for coping with unfavorable conditions, including possibility of temporary roofing.

8. Record conference including decisions and agreements reached. Furnish a copy of records to each party attending.

1.8 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.

B. Store materials protected from exposure to harmful environmental conditions and at temperature and humidity conditions recommended by the manufacturer.

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1. Store materials above ground, on skids.

2. Protect material with waterproof covering and allow sufficient ventilation to prevent condensation buildup or moisture entrapment on the materials.

3. Manufacturer's product crates are designed for transportation only, not intended for loading materials to roof.

1.9 PROJECT CONDITIONS

A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

1.10 WARRANTY

A. 30 year, no dollar limit, warranty.

1. 30 year no dollar limit watertight warranty.

2. Provide installers 5 year minimum warranty covering roofing system installation and water-tightness.

B. Warranty for standing seam metal, low slope roofing, ANSI-SPRI ES-1 Edge Metal and roof accessories must be provided by a sole source manufacturer.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: Garland Company, Inc. (The); 3800 E. 91st St., Cleveland, OH 44105. ASD. Toll Free: 800-321-9336. Phone: 216-641-7500. Fax: 216-641-0633. Web Site:

www.garlandco.com.

1. Local Representative: Doug Clark / (925) 784-6701 / dclark@garlandco.com

B. Or Equal.

2.2 STANDING SEAM METAL ROOFING

A. R-Mer Shield:

1. Width of Standing Seam Panel:

a. 16-3/4 inches.

2. Standing Seam: 2-1/16 inch tall mechanically seamed with factory installed hot melt sealant in-seam cap. Panel/Cap is configured with a total of 4 layers of metal surrounding anchor clip and top rail.

3. Panel Profile: Provided with minimum 1-1/2 inches wide elevated mesa's every 2 inches on center continuous throughout panel. Stiffening ribs shall also be located in flat of panel next to the standing seam legs. Panel profile shall be symmetric in shape.

a. Slope: Open Purlins or Solid Substrate down to 1/4:12.

4. Panel material:

a. Aluminum, 3105-H14 alloy, smooth as per ASTM B 209, .040 inch thickness.

5. Flashing and flat stock material: Fabricate in profiles indicated on Drawings of same material, thickness, and finish as roof system, unless indicated otherwise.

6. Coated Finish:

a. Exposed surfaces for coated panels:

1) Two coat coil applied, baked-on full-strength (70% resin) fluorocarbon coating system (polyvinylidene fluoride, PVF2), applied by manufacturer's approved applicator.

2) Coating system shall provide nominal 1.0 mil dry film thickness, consisting of primer and color coat.

b. Unexposed surfaces for coated panels shall be baked-on polyester coating with

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.20 to .30 dry film thickness (TDF).

7. Accessory Components:

a. Anchor Clips:

1) Concealed Standard Anchor Clips: Clips must be extruded aluminum

ONE (1) piece clip with projecting legs for additional panel alignment and provision for unlimited thermal movement in each direction along the longitudinal dimension.

2) Top Rail shall be snap-in-place extruded aluminum retainer. The top rail shall be used as a 6 inch length aligned with each panel clip, or in continuous lengths spanning one or more wind uplift zones, as required by the manufacturer's testing data and project engineering calculations.

a) Two piece clips are unacceptable.

b) Sealant applied in panel cap must be isolated from clip to ensure that no sealant damage occurs from the movement of the panel during expansion and contraction.

c) Clip must maintain a clearance of a minimum of 1/2 inch between panel and substrate for proper ventilation to help prevent condensation on underside of panel and eliminate the contact of panel fastener head to panel.

b. Gable Anchor Clips:

1) Extruded Aluminum.

c. Fasteners:

1) Concealed fasteners: Corrosion resistant steel fasteners (zinc plated, stainless steel or equal) designed to meet structural loading requirements.

2) Exposed fasteners: Series 410 stainless steel fasteners or 1/8 inch diameter stainless steel waterproof rivets. All exposed fasteners shall be factory painted to match the color of the standing seam panels.

d. Closures: Factory precut closed cell foam meeting ASTM D 1056 or ASTM D 3575, enclosed in metal channel matching panels when used at hip, ridge, rake, and jamb.

e. Provide all miscellaneous accessories for complete installation.

2.3 STANDING SEAM METAL ROOFING ACCESSORIES

A. Underlayment: R-Mer Seal

1. 40 mil minimum high temp self-adhered membrane, installed in accordance with manufacturer's recommendations.

B. Barrier Boards:

1. Georgia-Pacific Corp. 1/4 inch minimum Dens-Deck protective barrier board with a

Class A fire rating over deck surfaces.

C. Sealant:

1. Concealed Applications: Non-Curing Butyl Sealant - Schnee-Morehead, Inc. SM5430

Acryl-R, or equal.

2. Exposed Applications: UV Resistant Tripolymer Sealant - Geocel Corporation, 2300

Tripolymer Sealant, or equal.

2.4 METAL ROOFING ACCESSORlES

A. R-Mer SS Sheet Stock: High gloss, factory painted aluminum

1. Material and Thickness:

a. 0.040 inch aluminum

PART 3 EXECUTION

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3.1 EXAMINATION

A. Examine surfaces to receive metal roofing. Notify the Architect in writing of any defective conditions encountered. Starting of work shall constitute acceptance of such conditions.

B. Structural Deck Substrate:

1. Inspect roof deck to verify deck is clean and smooth, free of depressions, waves, or projections, and properly sloped.

2. Verify deck is dry and joints are solidly supported and fastened.

3. Verify wood nailers are installed and correctly located. Do not use pressure-treated wood containing salt-based preservatives or materials corrosive to steel.

C. Structural Framing Substrate:

1. Verify primary and secondary framing members are installed and fastened, properly aligned and sloped.

2. Verify damaged shop coatings are repaired with touch up paint.

D. Verify roof openings, curbs, pipes, sleeves, ducts, or vents through roof are solidly set, reglets are in place, and nailing strips located.

E. Correct defective conditions before beginning work.

3.2 INSTALLATION

A. Install metal roof system in conformance with the NRCA Roofing and Waterproofing Manual, SMACNA Architectural Sheet Metal Manual, Manufacturers approved shop drawings and installation requirements.

B. Manufacturer to provide panels specific to the project. Fabrication of the panels by the installing contractor is prohibited.

C. Coordinate with installation of rigid board insulation as specified in Section 07 25 00 - WeatherBarriers.

D. Install all panels continuous from ridge to eave. Transverse seams are not permitted.

E. Install underlayment and eave protection sheet underlayment as recommended by the Manufacturer.

F. Panel lengths that exceed maximum shipping lengths shall be field rolled on equipment owned by the panel manufacturer. Seam sealant must be factory applied.

G. Exposed fasteners, screws and/or roof mastic are unacceptable and will be rejected. System configuration only allows for exposed fasteners at panel overlap, if required, and at trim details in accordance with the Manufacturer's requirements.

H. Where not otherwise indicated conform to SMACNA details including flashings and trim.

I. Install sealants where indicated to clean dry surfaces only without skips or voids.

J. Install metal edge treatment in accordance with the manufacturer's instructions and the approved shop drawings.

K. Install metal roofing accessories in accordance with the manufacturer's instructions and the approved shop drawings.

3.3 PROTECTION

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A. Protect installed products until completion of project.

B. Touch-up, repair or replace damaged products before Substantial Completion.

3.4 FIELD QUALITY CONTROL

A. Inspection: Provide manufacturer's field observations a minimum of three times per week.

Provide a final inspection upon completion of the Work.

1. Warranty shall be issued upon manufacturer's acceptance of the installation.

2. Field observations shall be performed by a Sales Representative employed full-time by the manufacturer and whose primary job description is to assist, inspect and approve membrane installations for the manufacturer. Manufacturer must provide a detailed report weekly including pictures and comments of work observed.

3. Provide observation reports from the Sales Representative indicating procedures followed, weather conditions and any discrepancies found during inspection.

4. Provide a final report from the Sales Representative, certifying that the roofing system has been satisfactorily installed according to the project specifications, approved details and good general roofing practice.

END OF SECTION