METAL ROOFING

Specifications

SECTION 07610
PREFORMED/PREFINISHED METAL ROOFING
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Preformed, prefinished metal roofing and flashings.
B. Miscellaneous trim, flashing, closures, and accessories.
C. Sealants.
D. Fastening devices.

1.02 RELATED SECTIONS
A. Section 05120: Structural Steel Framing.
B. Section 05500: Miscellaneous metal fabrication.
C. Section 06100: Rough Carpentry.
D. Section 07631: Flashing and Sheet Metal.
E. Section 07900: Sealants.
1.03 REFERENCES
A. ASTM A-446-85.
B. ASTM A-525-86.
C. ASTM A-792-86.
D. ASTM B-209.
E. ASTM B-370.
F. Aluminum Association.
G. SMACNA-Architectural Sheet Metal Manual.

1.04 ASSEMBLY DESCRIPTION
A. The roofing assembly includes preformed sheet metal panels, related accessories, valleys, hips, ridges, eaves, corners, rakes, miscellaneous flashing and attaching devices.

1.05 SUBMITTALS
A. Installing contractor shall submit detailed drawings showing layout of panels, anchoring details, joint details, trim, flashing, and accessories. Show details of weatherproofing, terminations, and penetrations of metal work.
B. Installing contractor shall submit a sample of each type of roof panel, complete with factory finish.
C. Installing contractor shall submit calculations with registered engineer seal, verifying roof panel and attachment method resists wind pressure imposed on it pursuant to applicable building codes.

1.06 QUALITY ASSURANCE
A. Manufacturer: Company specializing in Architectural Sheet Metal Products with ten years min. experience. B. No product substitutions shall be permitted without meeting the specifications.
C. Substitutions shall be submitted ten days prior to bid date and acceptance put forth in an addendum.
D. No substitutions will be accepted after the bid date.

1.07 DELIVERY, STORAGE AND HANDLING
A. Delivery of material shall be made only after suitable facilities for its storage and protection are available on the site.
B. Upon receipt of preformed metal panels, flat sheets, flashings and panel accessories, installer must examine the shipment for damage and for completeness of the consignment (acceptance of delivery constitutes that the order has been inventoried prior to unloading and all product is present).
C. Panels must be stored in a clean, dry and well-ventilated place, in such a way as to prevent banding, abrasion or twisting of the product. One end should be elevated to allow moisture (such as condensation) to run off.
D. Care should be taken to avoid gouging, scratching or denting and prevent contact with any substance, which may cause a discoloration in the finish during storage.
E. Panels with strippable film must not be stored in the open or exposed to the sun.
F. Stack all materials to prevent damage and to allow for adequate ventilation.
G. Any protective plastic film must be removed prior to the installation of any panels or trim.
H. Do not allow traffic on the completed roof.

1.08 WARRANTY
A. Provide manufacturers standard Thirty Five (35) year warranty against color change or chalking, commencing on the date of final acceptance.
B. A standard one (1) year weather-tightness warranty is to be supplied by the installing contractor.

PART 2 PRODUCT

2.01 ACCEPTABLE MANUFACTURERS
A. Aeicor Metal Products, Inc. Fort Lauderdale, Florida.
B. Substitutions must fully comply with specified requirements and must be submitted within ten (10) days prior to bid date in order to qualify.

2.02 SHEET MATERIALS
A. Steel shall be ASTM A446-85 Grade C, G90 Coating ASTM 525-86 Hot Dipped Galvanized, 24 gauge core steel or **Galvalume ASTM A-792-86.
B. Aluminum shall be ASTM B-209 in .032" or .040" thickness with an H-14 temper. (Miami-Dade Approval Not Available)
C. Copper shall be ASTM B-370 cold rolled in 16 or 20 ounce. (Miami-Dade Approval Not Available)
D. Finish shall be full strength “Kynar-500 / Hylar-5000” Fluorocarbon coating, applied by the coil coater on a continuous coil coating line, with a top side dry film thickness of 0.70 to 0.90 mil over 0.25 to 0.35 mil prime coat, to provide a total dry film thickness of 0.95 to 1.25 mil. Bottom side shall be coated with primer with a dry film thickness of 0.25 mil. Finish shall conform to all tests for adhesion, flexibility, and longevity as specified by the “Kynar-500 / Hylar-5000” finish supplier.
E. Strippable film may be (optional) applied to the top side of the painted coil to protect the finish during fabrication, shipping and field handling. This strippable film must be removed before installation.

2.03 ACCESSORY MATERIALS
A. Fasteners: Minimum of #8 wafer head type screws compatible with the material being used, concealed at all times. If an exposed fastener must be used, it can only be a #44 pop rivet of the same material (or compatible) and finish as the roof panels.
B. Sealants: As specified in Section 07900. Recommended locations of sealants are depicted on the standard details, however, jobsite conditions may require that additional protection be provided for at alternate locations.

2.04 FABRICATION
A. All adjacent flashing (concealed or exposed) shall be of the same material (or compatible) and finish as the roof panels.

2.05 PREFORMED METAL ROOFING
A. AEICOR SS-1-14 or SS-1-16 or SS-1-20 PANEL
1. 1-1/2 " high seams are standard and are available with two optional *stiffening ribs* evenly spaced within the panel.
2. Panels and seams shall be roll-formed in continuous lengths from eave to ridge.
3. Clips to be spaced as needed to meet local uplift requirements but not to exceed 8 inches on center.
4. Panels to be installed over solid plywood sheathing.
a. Metro-Dade requires plywood to be fastened with #8x2” screws @ 6” o.c.
5. If a class “A” fire rating is required, one layer of Tritex, or 1/4" Densdeck is to be installed over plywood prior to installation of felt, or one layer of Versashield .

PART 3 EXECUTION

3.01 INSPECTION

A. SUBSTRATE
1. Examine plywood sheathing to ensure proper attachment to framing.
2. Inspect roof deck to verify deck is clean and smooth, free of depressions, waves and projections, properly sloped to valleys and eaves.
3. Verify roof openings, curbs, pipes, sleeves, ducts or vents through roof are solidly set, cant strips and reglets in place, and nailing strips located.
4. Verify deck is dry. Joints in wood deck to be solidly supported and nailed.

B. FELTING
1. Verify 30 lb. Un-perforated asphalt saturated roofing felt underlayment is installed as per the local building code requirements, in single layer, over solid sheathing and fastened in place.
2. Ensure that felt is installed horizontally, starting at the eave working to the ridge.
3. Ensure that all nail heads are totally flush with the substrate.

3.02 INSTALLATION
A. Comply with manufacturers standard instructions and conform to standards set forth in the Architectural Sheet Metal Manual published by SMACNA, in order to achieve a watertight installation.
B. Install panels in such a manner that horizontal lines are true and level and vertical lines are plumb.
C. Install all trim before installing roof panels, do not walk on the completed roof.
D. Remove protective (optional) strippable film prior to installation of roof panels.
E. Attach panels using manufacturer’s standard clips and fasteners.
F. Install sealants for preformed roofing panels as recommended by the manufacturer.
G. Do not allow panels or trim to come into contact with dissimilar materials.
H. Do not allow traffic on completed roof. If required, provide cushioned walk boards.
I. Protect installed panels and trim from damage caused by adjacent construction until completion of installation.
J. Remove and replace any panels or components which are damaged beyond successful repair.
K. Exposed edges are permissible due to the galvanic action of the system where the zinc migrates to protect the exposed material. However, efforts should be made to reduce the amount of exposed edges.

3.03 CLEANING
A. Clean any grease, finger marks or stains from the panels per manufacturer’s recommendations.
B. Remove all scrap and construction debris from the site.

3.04 FINAL INSPECTION
A. Final inspection shall be performed by the Architect, Owner or General Contractor, who will generate a punch list of items that need to be corrected. This punch list will be submitted to the installing contractor for completion within thirty (30) days.

END OF SECTION

TECHNICAL NOTES:
1.) Due to the inherent qualities as it relates to natural weathering, it is an acceptable industry standard for mill finished (bare) **Galvalume to show variations in its shade of color from panel to panel after installation. Extreme care must be given to this product in storage, (even more so than that of painted product) staining of the finish will occur of improperly stored. None of the above affects the structural integrity of the finished product and is not an acceptable reason for rejection. Aeicor assumes no responsibility for any unsatisfactory look that can possibly result from this substrate.

2.) A certain amount of waviness, called oil canning, is inherent in any product manufactured from coiled sheet metal. The amount of oil canning can vary due to several factors. Uneven substrates over which panels are applied, the width of the panel, the color choice and even weather conditions, to name a few. Oil canning of a panel does not affect its structural integrity and is not sufficient cause for rejection.
REV. 05/01/02
**Galvalume is a registered trademark of B.I.E.C. International, Inc.