Custom Sheet Metal Roofing

�� SECTION 07611

�� CUSTOM SHEET METAL ROOFING

�� P.O. Box 360

�� Minneapolis, MN� 55440

PART 1� GENERAL

1.1 SECTION INCLUDES

�� A.� Prefinished galvanized steel roofing.

�� B.� Prefinished aluminum roofing.

�� C.� Prefinished, preformed galvanized steel roofing.

�� D.� Integral flashings and counterflashings.

�� E.� Integral fascias.

1.2 RELATED SECTIONS

�� A.� Section 06112 - Framing and Sheathing:� Roof deck construction.

�� B.� Section 06114 - Wood Blocking and Curbing:� Wood blocking and battens for metal roofing substrate profiles.

�� C.� Section 07212 - Board Insulation:� Rigid insulation under sheet metal roofing.

�� D.� Section 07620 - Sheet Metal Flashing and Trim.

�� E.� Section 07631 - Gutters and Downspouts.

�� F.� Section 07724 - Roof Hatches.

�� G.� Section 07810 - Plastic Unit Skylights.

�� H.� Section 07900 - Joint Sealers.

1.3 REFERENCES

�� A.� ASTM A 370 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products.

�� B.� ASTM A 446/A446M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Structural (Physical) Quality.

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

�� D.� ASTM D 226 - Standard Specification for Asphalt-Saturated� Organic Felt Used in Roofing and Waterproofing.

�� E.� ASTM D 522 - Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings.

�� F.� ASTM D 2244 - Standard Test Method for Calculation of Color Differences from Instrumentally Measured Color Coordinates.

�� G.� ASTM D 4214 - Standard Test Methods for Evaluating Degree of Chalking of Exterior Paint Films.

�� H.� NCCA 11-5 -� Technical Bulletin No. 11-5 of the National Coil Coaters Association.

�� I.� NCCA 11-6 - Technical Bulletin No. 11-6 of the National Coil Coaters Association.

�� J.� NCCA 11-12 - Technical Bulletin No. 11-12 of the National Coil Coaters Association.

�� K.� SMACNA Manual -� Architectural Sheet Metal Manual;� Sheet Metal and Air Conditioning Contractors National Association, Inc.

1.4 SUBMITTALS

�� A.� Submit under provisions of Section 01300.

�� B.� Product Data:� Provide data on properties of metal and finish.

�� C.� Shop Drawings:� Indicate profiles, jointing pattern and details, detailed fastening requirements, flashings, terminations, and details at penetrations and transitions.

�� D.� Selection Samples:� Submit color chips on actual metal samples to illustrate full range of standard colors available.

�� E.� Verification Samples:� Submit two samples not less than 12 inches square, illustrating metal roofing in specified finish, mounted on plywood and including typical fastening detail and typical seam.

1.5 QUALITY ASSURANCE

�� A.� Perform work in accordance with SMACNA standard details and requirements.

�� B.� Fabricator and Installer:� Company specializing in sheet metal roofing installations similar in scope and type to project requirements with not less than 5 years of documented experience.

�� C.� Mock-Up:� Provide mock-up under provisions of Section 01400.

�� 1.� Construct mock-up not less than 6 feet by 6 feet, illustrating typical design features.

�� 2.� Locate where directed by Architect.

�� 3.� Demolish and remove from site when completed roofing work has been accepted.

1.6 DELIVERY, STORAGE, AND HANDLING

�� A.� Deliver, store, protect, and handle products in accordance with provisions of Section 01600.

�� B.� Stack prefinished material to prevent bending, twisting, or mechanical damage, and to allow ventilation.� Cover to protect from ultraviolet light, and slope material to ensure drainage.

1.7 WARRANTY

�� A.� Provide manufacturer's standard twenty year non-prorated warranty against fading, chalking, and loss of film integrity.� Warranty shall include cost of labor and replacement materials through 20th year and shall include the following provisions:

�� 1.� Color change will not exceed 5 NBS color units, when tested in accordance with ASTM D 2244.

�� 2.� Chalking will not be in excess of 8, when tested in accordance with ASTM D 4214.

PART 2� PRODUCTS

2.1 MANUFACTURERS

�� A.� Provide prefinished sheet metal for roofing and roofing accessories as manufactured and distributed by Vincent Metals, Building Products Group, P.O. Box 360, Minneapolis, MN� 55440.� Telephone:� 800-328-7800.

�� B.� Substitutions will not be acceptable.

�� C.� Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2 MATERIALS

�� A.� Galvanized Steel:� ASTM A 446, Grade A, 24 gage steel, G90 zinc coating, and as follows:

�� 1.� Minimum yield strength:� 36,000 psi, per ASTM A 370.

�� 2.� Coefficient of thermal expansion:� -6.7 x 10⁶ in/in/degree F, per ASTM E 228.

�� 3.� Modulus of elasticity:� 29 x 10⁶, per ASTM E 111.

�� 4.� Coil width:� 36 inches.

�� 5.� Coil width:� 48 inches.

�� 6.� Texture:� Smooth.

�� 7.� Texture:� Embossed stucco.

�� B.� Aluminum Sheet:� ASTM B 209, minimum yield strength 17,000 psi, and as follows:

�� 1.� Thickness:� 0.032 inch.

�� 2.� Thickness:� 0.040 inch.

�� 3.� Thickness:� 0.050 inch.

�� 4.� Thickness:� 0.063 inch.

�� 5.� Sheet width:� 48 inches.

�� 6.� Texture:� Smooth.

�� 7.� Texture:� Embossed stucco.

2.3 ACCESSORIES

�� A.� Concealed Fasteners: As recommended by manufacturer for substrate conditions.

�� B.� Exposed Fasteners:� Rivets color matched to prefinished roofing sheet.

�� C.� Underlayment:� ASTM D 226, No. 15 asphalt saturated roofing felt.

�� D.� Underlayment:� 6 mil polyethylene sheet.

�� E.� Sealant:� As specified in Section 07900.

2.4 PREFORMED ROOFING SYSTEM

�� A.� Provide prefinished ColorKlad System 1 roof system, preformed into standing seam profile and as follows:

�� 1.� Base metal:� 24 gage G90 galvanized steel.

�� 2.� Panel width:� 12 inches.

�� 3.� Panel width:� 16 inches.

�� 4.� Panel width:� 18 inches.

�� 5.� Panel width:� 22 inches.

�� 6.� Panel length:� As indicated on the drawings.

�� 7.� Panel length:� ________________.

�� B.� Accessories:

�� 1.� Double hemmed standing seam snap-on caps in finish matching roof panels.

�� 2.� Clips:� manufacturer's standard 26 gage steel clips, G90 galvanized.

2.5 FABRICATION

�� A.� Perform all cutting and forming operations with hand or power tools to achieve sharp, clean edges, properly dressed and closely aligned.

�� B.� Perform all fabrication with factory-applied strippable film in place.

�� 1.� If soldering is required, carefully remove film and prefinished coating in areas to be soldered, leaving adjacent film and finish undamaged.

�� C.� Form panels and accessories true to shape, accurate in size, and free from distortion.� Form pieces in longest practicable lengths, to avoid seams.

2.6 FINISHES

�� A.� Provide ColorKlad 70% Kynar/Hylar based fluoropolymer coating system on exposed side of roofing panels and accessories, meeting the following requirements:

�� 1.� Thickness: 1 +/- 0.1 mil.

�� 2.� Hardness:� F minimum, per NCCA 11-12.

�� 3.� Adhesion:� 1/16 inch cross hatch; no removal per NCCA 11-5.

�� 4.� Formability:� 180 degree 2T bend with no cracking or removal, per ASTM D 522.

�� 5.� Reverse impact:� Mo removal when taped, impact force of 70 in lbs, per NCCA 11-6.

�� Cordovan

�� 6.� Color:� As selected by Architect from manufacturer's standards.

�� 7.� Color:� As scheduled on the drawings.

�� 8.� Color:� _________________.

�� B.� Provide protective 0.3 mil wash coat film on reverse side of roofing panels and accessories.

PART 3� EXECUTION

3.1 EXAMINATION

�� A.� Inspect roof deck to verify that it is properly installed and ready to receive sheet metal roofing.� Do not begin roofing installation until unsatisfactory conditions have been corrected.

3.2 INSTALLATION

�� A.� Conform to approved shop drawings and standard SMACNA details for conditions not covered by shop drawings.

�� B.� Install underlayment in 2 layers;� first layer laid parallel to slope and lapped not less than six inches;� second layer laid perpendicular to slope with 2 inch laps.

�� C.� Install roofing system using fasteners at spacing recommended by manufacturer.� Cleat and seam all joints.� Allow for thermal expansion of roofing panels in method of fastening.

�� D.� Immediately after each roofing panel is installed, remove factory-applied protective film.

�� E.� Secure integral flashings with concealed fastening methods;� seal metal joints watertight.� At soldered joints, carefully remove protective film and finish to base metal before soldering, taking care to avoid damage to adjacent finish.

3.3 ADJUSTING AND CLEANING

�� A.� Touch up any areas of abrasion and exposed soldered areas with matching factory-supplied paint.

�� B.� Clean any soiled roofing panels with mild soap and water, followed by a clear rinse.� Do not use abrasives or cleaning techniques that would scratch the prefinished surface.

�

3.4 PROTECTION

�� A.� Do not permit traffic over unprotected roof surface.

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