A06 Specification 074113 Metal Roofing.pdf

EMERGENCY REPAIR - COYOTE LOOP HOUSING ROOF

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METAL ROOFING

7/6/2020

SECTION 07 41 13 - METAL ROOFING

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Structural roofing system of preformed steel panels.

1.2 RELATED REQUIREMENTS

A. General Specifications

1.3 REFERENCE STANDARDS

A. ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process; 2018.

B. ASTM D1970/D1970M - Standard Specification for Self-Adhering Polymer Modified

Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection;

2018.

C. ASTM E96/E96M - Standard Test Methods for Water Vapor Transmission of Materials; 2016.

D. ASTM E1592 - Standard Test Method for Structural Performance of Sheet Metal Roof and

Siding Systems by Uniform Static Air Pressure Difference; 2005 (Reapproved 2017).

E. ASTM E1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference; 1995 (Reapproved 2018).

F. ASTM E1680 - Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof

Panel Systems; 2016.

G. IAS AC472 - Accreditation Criteria for Inspection Programs for Manufacturers of Metal Building Systems; 2017.

H. UL 580 - Standard for Tests for Uplift Resistance of Roof Assemblies; Current Edition, Including All Revisions.

1.4 SUBMITTALS

A. See General Specifications for submittal procedures.

B. Product Data: Manufacturer's data sheets on each product to be used, including:

1. Storage and handling requirements and recommendations.

2. Installation methods.

3. Specimen warranty.

C. Shop Drawings: Include layouts of roof panels, details of edge and penetration conditions, spacing and type of connections, flashings, underlayments, and special conditions.

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1. Show work to be field-fabricated or field-assembled.

7/6/2020

D. Verification Samples: For each roofing system specified, submit samples of minimum size 12 inches (305 mm) square, representing actual roofing metal, thickness, profile, color, and texture.

E. Test Reports: Indicate compliance of metal roofing system to specified requirements.

F. Warranty: Submit specified manufacturer's warranty and ensure that forms have been completed in Owner's name and are registered with manufacturer.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing in manufacturing products specified in this section, with not less than three years of documented experience.

1. Accredited by IAS in accordance with IAS AC472.

B. Installer Qualifications: Company specializing in performing work of the type specified and with at least three years of documented experience and approved by manufacturer.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Store roofing panels on project site as recommended by manufacturer to minimize damage to panels prior to installation.

1.7 WARRANTY

A. Submit manufacturer’s standard warranty information.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Metal Roof Panels:

1. Union Corrugating Company: www.unioncorrugating.com

2. Corrugated Metals Inc.: www.corrugated-metals.com

3. Substitutions: See General Specifications for submittal procedures.

2.2 STRUCTURAL METAL ROOF PANELS

A. Structural Metal Roofing: Provide complete roofing assemblies, including roof panels, clips, fasteners, connectors, sealants and miscellaneous accessories, tested for compliance with the following minimum standards:

1. Structural Design Criteria: Provide panel assemblies designed to safely support design loads.

http://www.unioncorrugating.com/ http://www.corrugated-metals.com/

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2. Overall: Complete weathertight system tested and approved in accordance with ASTM

E1592.

3. Wind Uplift: Class 90 wind uplift resistance of UL 580.

4. Water Penetration: No water penetration when tested according to procedures and recommended test pressures of ASTM E1646. Perform test immediately following air infiltration test.

B. Metal Panels: Factory-formed panels with galvanized finish.

1. Type: Single skin, uninsulated.

2. Steel Panels:

a. Zinc-coated SS (structural steel) sheet complying with ASTM A653/A653M;

minimum G60 (Z180) galvanizing.

b. Steel Thickness: Minimum 22 gage (0.03 inch) (0.76 mm).

c. Pattern and corrugation dimensions: match existing.

3. Profile: Corrugated, lapped seam, with integral sealant bead and exposed fastener system.

4. Texture: Smooth.

5. Length: Full length of roof slope, without lapped horizontal joints.

6. Width: Maximum panel coverage: match existing.

2.3 ATTACHMENT SYSTEM

A. Exposed System: Provide manufacturer's recommended painted steel fasteners engineered to meet performance requirements and equipped with appropriate sealant separators to provide weathertight connections that will accommodate anticipated thermal movement.

2.4 FABRICATION

A. Panels: Provide factory or field fabricated panels and accessory items, using manufacturer's standard processes as required to achieve specified appearance and performance requirements.

B. Joints: Provide captive gaskets, sealants, or separator strips at panel joints to ensure weathertight seals, eliminate metal-to-metal contact, and minimize noise from panel movements.

2.5 ACCESSORIES

A. Miscellaneous Sheet Metal Items: Provide flashings, trim, moldings, closure strips, and non-corrugated ridge cap of the same material, thickness, and finish as used for the roofing panels.

Items completely concealed after installation may optionally be made of stainless steel.

B. Ridge Closures: Provide prefabricated, close-fitting components of corrugated ethafoam closure strip.

http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592

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C. Closure at eaves: Provide prefabricated close-fitting corrugated-edge steel closure strip near outer edge of eaves, and corrugated ethafoam closure strip up-slope of steel closure.

D. Sealants:

1. Exposed Sealant: Elastomeric; silicone, polyurethane, or silyl-terminated polyether/polyurethane.

2. Concealed Sealant: Non-curing butyl sealant or tape sealant.

3. Seam Sealant: Factory-applied, non-skinning, non-drying type.

E. Slip Sheet

1. Rosin-sized sheathing paper.

F. Underlayment: Self-adhering rubber-modified asphalt sheet complying with ASTM D1970/D1970M; 22 mil (0.55 mm) minimum total thickness; with strippable release film and woven polypropylene sheet top surface.

1. Sheet Thickness: 22 mil, 0.022 inch (0.55 mm) minimum total thickness.

2. Apply in 1 or 2 layers to achieve total of 50 lb per 100 square feet.

3. Self Sealability: Passing nail sealability test specified in ASTM D1970/D1970M.

4. Low Temperature Flexibility: Passing test specified in ASTM D1970/D1970M.

5. Water Vapor Permeance: 0.1 perm (5.72 ng/Pa s sq m), maximum, when tested in accordance with ASTM E96/E96M Procedure A (desiccant method).

6. Manufacturers:

a. Henry Company; Blueskin PE200HT: www.henry.com/#sle.

b. Polyglass USA, Inc; Polystick MTS Self-Adhered High Temperature Roof

Underlayment: www.polyglass.us/#sle.

c. Or approved equal.

d. Substitutions: See General Specifications for submittal procedures.

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not begin installation of preformed metal roof panels until substrates have been properly prepared.

B. If substrate preparation is the responsibility of another installer, notify C.O. of unsatisfactory preparation before proceeding.

3.2 PREPARATION

A. Broom clean wood sheathing prior to installation of roofing system.

B. Coordinate roofing work with provisions for roof drainage, flashing, trim, penetrations, and other adjoining work to assure that the completed roof will be free of leaks.

C. Separate dissimilar metals by applying a bituminous coating, self-adhering rubberized asphalt sheet, or other permanent method approved by roof panel manufacturer.

http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://global.ihs.com/doc_detail.cfm?rid=BSD&document_name=ASTM%20E1592 http://www.henry.com/#sle http://www.polyglass.us/#sle

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D. Where metal will be in contact with wood or other absorbent material subject to wetting, seal joints with sealing compound and apply one coat of heavy-bodied bituminous paint.

3.3 INSTALLATION

A. Overall: Install roofing system in accordance with approved shop drawings and panel manufacturer's instructions and recommendations, as applicable to specific project conditions.

Anchor all components of roofing system securely in place while allowing for thermal and structural movement.

1. Install roofing system with exposed fasteners prefinished to match panels.

2. Minimize field cutting of panels. Where field cutting is absolutely required, use methods that will not distort panel profiles. Use of torches for field cutting is absolutely prohibited.

B. Accessories: Install all components required for a complete roofing assembly, including flashings, trim, moldings, closure strips, caps, rib closures, ridge closures, and similar roof accessory items.

C. Roof Panels: Install panels in strict accordance with manufacturer's instructions, minimizing transverse joints except at junction with penetrations.

3.4 CLEANING

A. Clean exposed sheet metal work at completion of installation. Remove grease and oil films, excess joint sealer, handling marks, and debris from installation, leaving the work clean and unmarked, free from dents, creases, waves, scratch marks, or other damage to the finish.

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