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SECTION _
PREFORMED METAL ROOFING
1. WORK SPECIFIED HEREIN
1.1. All labor, material, equipment,
and services necessary to furnish and install metal roofing as shown or
specified, including accessories contiguous with the roofing.
2. SPECIFIED PRODUCTS AND
SUBSTITUTIONS
2.1. In accordance with Section
.
3. SUMMARY
3.1. This section includes the following.
3.1.1. Factory-formed or onsite formed and field
assembled, concealed fastener US175LS. Panel seams are 1-3/4 inch
profile, snap seamed.
4. SUBMITTALS
4.1. Submittals required in accordance
with Section .
4.2. Submit detailed Product Data
including complete installation details.
4.3. Submit Shop Drawings showing
seams, flashing, ridges, gutters, and fascia details. Show size,
type of joints and locations, fasteners, special shapes and construction
details of work, including provisions for expansion and contraction,
prior to fabrication and delivery.
4.4. Submit 12
inch by inch Samples of sheet metal material.
Sample shall indicate finish, color, panel profile and thickness.
4.5. Submit complete color chart for
Architect's color selection.
4.6. Submit evidence of panel system’s
compliance with the following test standards:
4.6.1. UL-580 (Uplift Resistance)
4.6.2. ASTM E-330 or equivalent
(Air Leakage Resistance)
4.6.3. ASTM E-283 or equivalent
(Water Penetration Resistance)
4.6.4. ASTM 1592-95 (Uniform
Static Air Pressure Difference).
5. QUALITY ASSURANCE
5.1. Applicable standards:
5.1.1. SMACNA: "Architectural Sheet Metal Manual", Sheet Metal
and Air Conditioning Contractors National Association, Inc.
5.1.2. AISC: "Steel Construction Manual", American Institute of
Steel Construction.
5.1.3. AISI: "Cold Form Steel Design Manual", American Iron and
Steel Institute.
5.1.4. ASTM A 792-83-AZ50: "Specifications for Steel Sheet,
Aluminum-Zinc Alloy Coated (Galvanized) by the Hot Dip Process,
General Requirements (Zincalume®) or (Galvalume®)",
American Society for Testing and Materials.
5.1.5. UL: "Tests for Uplift Resistance of Roof Assemblies",
Underwriters Laboratories, Inc.
5.1.6. ASTM E 1680-95: "Standard Test Method for Rate of Air
Leakage Through Exterior Metal Roof Panel Systems", American Society
for Testing and Materials.
5.1.7. ASTM E 1646-95: "Standard Test Method for Water
Penetration of Exterior Metal Roof Panel Systems by Uniform Static
Air Pressure Difference", American Society for Testing and
Materials.
5.2. Manufacturer’s qualifications:
5.2.1. Manufacturer has a minimum of
years experience in manufacturing panels of this nature.
5.3. Installer’s qualifications:
5.3.1. Installer of the system shall be an approved installer,
certified by the Manufacturer, and meet the following minimum
criteria:
5.3.2. Maintain general liability coverage for each loss as
required by contract.
5.3.3. Maintain sufficient worker’s compensation coverage as
mandated by law.
5.3.4. Has no viable claims pending regarding negligent acts or
defective workmanship on previously performed or current projects.
5.3.5. Has not filed for protection from creditors under any
state or federal insolvency or debtor relief statutes or codes.
5.3.6. Project foreman is the person having received specific
training in the proper installation of the specified system and will
be present to supervise whenever material is being installed.
5.3.7. Provide five references from five different architects or
building owners for projects that have been in service for a minimum
of two years, stating satisfactory performance by the installer.
5.3.8. Provide certification letter that installer has a minimum
of three years of metal product installation experience immediately
preceding the date upon which work is to commence.
5.4. Pre-installation Conference:
5.4.1. Prior to installation of roofing system, conduct a
pre-installation conference at the project site.
5.4.2. Attendance: Owner, Architect, Contractor, Project
Superintendent, and Roof Applicator, Manufacturer’s Representative
5.4.3. Agenda:
5.4.3.1. Roofing details and agenda
5.4.3.2. Critical work sequencing and review of phasing
plan
5.4.3.3. Inspection sequencing
6. MATERIALS
6.1. Metal roof system profile:
6.1.1. Products – Ultra Seam® 175LS as manufactured by
U.S. Metals, LLC, which meets the following criteria.
6.1.1.1. Continuous length by inch (nominal) wide panel
with 1.75" -inch high minimum panel seam that is snap field
seamed. Options include flat or with striations (ribs).
6.1.2. Metal will be 24 gauge (UL-90 rated - Underwriters
Laboratories) steel with the following properties.
6.1.2.1. Galvanized (zinc coated) Grade D, ASTM A653, G90
coating designation, 50,000 psi minimum yield, tension
leveled, or
6.1.2.2. Galvalume® (aluminum-zinc alloy)
coated steel, Grade D, ASTM A792, AZ50 coating designation,
50,000 psi minimum yield, tension leveled.
6.1.3. Finish:
6.1.3.1. Fluoropolymer coating with 35-year non-prorated
limited warranty, or mill finished product.
6.1.3.2. Fluoropolymer coatings specifications as
follows.
6.1.3.2.1. Humidity resistance: 1500 hours per
Federal Test Method Standard 141, 6201 or ASTM D2247-02.
6.1.3.2.2. Salt-spray resistance: 1000 hours per ASTM
B117-03
6.1.3.2.3. Accelerated weathering: 3000 hours per
ASTM D822, G 151, G 153.
6.1.3.3. Surface appearance is smooth and free of
streaks, blisters and other imperfections.
6.1.3.4. Color, if needed, will be Drexmet®
High Performance Metal Roofing Finishes (Trinar®
or SMP). The Architect or Owner will select a color from the
Manufacturer’s Drexel Metals Corporation Color Chart.
6.1.3.5. 24 GA one (1) and two (2) piece sliding clips
allowing for thermal movement per design by Manufacturer.
6.2. Fabrication:
6.2.1. Roll form panels in continuous lengths, from eave to ridge
or as required allowing rooftop mechanical systems or other roof
equipment or penetrations.
6.2.2. Panels to be jobsite or factory formed in continuous
lengths. Spliced panels are not acceptable.
6.2.3. Fabricate trim/flashing and accessories to detailed
profiles.
6.2.4. Fabricate trim/flashing from same material as the panels.
6.3. Acceptable Manufacturer:
6.3.1. U.S. Metals, LLC, 1300 40th Street, Denver, CO
80205, tel. (303) 292-1511, fax (303) 292-1676, email
eboyle@usmetalsonline.com.
6.4. Fasteners:
6.4.1. All roof fasteners must be approved by the Manufacturer.
6.4.2. Gimlet Point self-tapping #10 x 1" ultra low profile head
with taper made from either carbon steel with ACQ compatible coating
for treated lumber or 410 stainless steel as required by
Manufacturer to meet design loads and manufactured by Triangle
Fastener Corporation.
6.4.3. Blind fasteners must be 5056 aluminum rivet painted to
match roofing material or stainless steel IFI Grade 50 rivet or
copper IFI Grade 20 rivet as required by Manufacturer and
manufactured by Triangle Fastener Corporation.
6.4.4. Use compatible fasteners for all applications. Any exposed
fasteners will be the color of the metal roof system.
6.4.5. Locate and space any exposed fasteners in a true vertical
and horizontal alignment or parallel to curve or per Manufacturer’s
roof design.
6.5. Accessories:
6.5.1. Provide all components required per the metal roof system
Manufacturer’s approved shop drawings for a complete metal roof
system to include panels, panel clips, trim/flashing, fascias,
ridge, closures, sealants, fillers and any other required items as
specified in the roof design.
6.5.1.1. All tape seal is to be a pressure sensitive, 100
percent solids, polyisobutylene compound sealing tape with a
release paper backing as required by the Manufacturer.
Provide permanently elastic, non-sagging, non-toxic,
non-staining tape seal approved by the metal roof system
Manufacturer.
6.5.1.2. All joint sealant must be either Sikaflex®-15LM,
Sikaflex®-219LM or NPC #900 Solar Seal®,
which meet the following minimum criteria.
6.5.1.2.1. Bond cohesion TT-S-230c no bond loss
6.5.1.2.2. Shore A hardness TT-S-230c 20 year average
6.5.1.2.3. Stain index TT-S-230c none
6.5.1.2.4. Sag TT-S-230c no sag
6.5.1.2.5. UV & cold exposure ASTM C 920 no cracking
6.5.1.2.6. Elongation ASTM-D 412 300%-400%
6.5.1.2.7. Tack free time ASTM-C-679 3-6 hours
6.5.1.2.8. Adhesion-in-peel TT-S-1543 30lbs/in
6.5.2. Prefabricated Roof Jacks:
6.5.2.1. Pipe flashings shall be a one piece EPDM
(ethylene propylene dienemonomer) molded rubber boot having
a serviceable temperature range of -30°F to 250°F (for
standard applications) or silicone molded rubber boot having
a serviceable temperature range up to 390°F (for high
temperature applications)] and shall be resistant to ozone
and ultraviolet rays. Units shall have an aluminum flanged
base ring. Install pipe flashing through flat portion of the
panel when possible.
6.5.3. Underlayment:
6.5.3.1. Underlayment will either be RoofTopGuard II or
self adhering roof underlayment or a combination of the two
as required by Manufacturer. RoofTopGuard II underlayment
will be used unless otherwise indicated by Manufacturer. If
self adhering underlayment is used, or as required by
Manufacturer, 30 lbs roof felt will be placed between the
underlayment and the metal roofing panel.
6.5.4. Roof Decking:
6.5.4.1. Roof deck must be 15/32" or greater plywood,
wood plank or other material and thickness approved by
Manufacturer.
7. EXECUTION
7.1. Inspect installed work of other trades and verify that such work
is complete to a point where this work may continue.
7.2. Verify that installation is made in accordance with approved
shop drawings and Manufacturer’s instructions.
7.3. Installation
7.3.1. Install metal roof system so that it is weather-tight.
Allow for expansion and contraction.
7.3.2. Provide concealed anchors at all panel attachment
locations.
7.3.3. Install panels plumb, level and straight with seams and
ribs parallel, conforming to design as indicated.
8. CLEANING
8.1. Dispose of excess materials and remove debris from site.
8.2. Clean work in accordance with Manufacturer’s recommendations.
8.3. Touch up minor scratches and abrasions with Manufacturer
supplied paint.
9. PROJECT CLOSE-OUT
9.1. Installing contractor must issue a written warranty to the Owner
to maintain the roof and flashing in a watertight condition for a period
of years from the date of substantial
completion.
END OF SECTION
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