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SECTION 07612
SHEET COPPER ROOFING
NOTE ** This section includes copper and lead-covered sheet
copper roofing. Styles include flat seam, standing
seam, batten seam, and horizontal seam (Bermuda
style) systems.
NOTE **
NOTE ** Information in this section is provided by the
Copper Development Association (CDA), the central
authoritative source of technical data on the
design specification and installation of
architectural copper products. With capabilities
for providing seminars, technical publications,
design assistance and review, CDA can be an
invaluable resource to the architect specifying any
architectural copper products or applications.
NOTE **
NOTE ** For additional information about copper roofing,
contact CDA at:
NOTE ** 260 Madison Avenue
NOTE ** New York, New York 10016
NOTE ** Tel: (212) 251-7200; Fax: (212) 251-7234
NOTE **
NOTE ** SECTION 07612 - SHEET COPPER ROOFING, Copyright
1998, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Edit list below to conform to project requirements.
A. Flat-seam copper roofing.
B. Standing-seam copper roofing.
C. Batten-seam copper roofing.
D. Horizontal-seam (Bermuda type) copper roofing.
E. Custom-designed copper roofing.
1.2 RELATED SECTIONS
NOTE ** Delete paragraphs below and add others as
appropriate for project.
A. Section 05120 - Structural Steel: Roof framing.
B. Section 06100 - Rough Carpentry: Wood framing and
decking.
C. Section 07200 - Thermal Insulation: Roof insulation.
D. Section 07622 - Copper Flashing and Trim: Flashing and
other trim not part of roofing.
E. Section 07712 - Copper Roof Specialties: Accessories on
roof other than mechanical and structural items.
NOTE ** Paragraph above may be edited to identify specific
items such as reglets, relief vents, roof expansion
assemblies, ornamental items, etc.
F. Section 07900 - Joint Sealers: Field-applied panel
sealants.
G. Section 09900 - Paints and Coatings: Copper roofing
finishes.
1.3 REFERENCES
A. ASCE 7 - Minimum Design Loads for Buildings and Other
Structures.
B. ASTM B 32 - Standard Specification for Solder Metal.
C. ASTM B 101 - Standard Specification for Lead-Coated
Copper Sheet and Strip for Building Construction.
D. ASTM B 370 - Standard Specification for Copper Sheet and
Strip for Building Construction.
E. UL 580 - Tests for Uplift Resistance of Roof Assemblies.
F. CDA 4115-1929 - Copper in Architecture Handbook; Copper
Development Association.
NOTE ** Delete article below if not required.
1.4 PERFORMANCE REQUIREMENTS
A. Design roof assembly to conform to the requirements of
ASCE 7, Minimum Design Loads for Buildings.
1.5 SUBMITTALS
A. Submit in accordance with Section 01300.
B. Product Data: Submit metal manufacturer's and
fabricator's specifications, installation instructions,
and general recommendations for roofing applications.
NOTE ** Delete paragraph below if work is fully concealed,
to be left unfinished, or field painted, or if
appearance is unimportant.
C. Samples: 6 inch square specimens of specified copper
roofing material.
NOTE ** Delete paragraph below if details are of no
importance or are adequately covered by working
drawings.
D. Shop Drawings: Show manner of forming, joining, and
securing copper roofing, and pattern of seams. Show
expansion joint details and waterproof connections to
adjoining work and at obstructions and penetrations.
1.6 QUALITY ASSURANCE
A. Installer: A firm with 3 years of successful experience
with installation of copper roofing of type and scope
equivalent to project requirements.
B. Industry Standard: Except as otherwise shown or
specified, comply with applicable recommendations and
details of CDA 4115-1929, "Copper in Architecture
Handbook" by Copper Development Association (CDA).
Conform to dimensions and profiles indicated.
NOTE ** Delete paragraph below if UL Class 90 roof not
required, or modify if FM Class I-90 or I-60
required.
C. Wind Uplift: Provide roof assemblies meeting
requirements of UL 580 for Class 90 wind uplift
resistance.
NOTE ** Delete mock-up provisions below unless the
expenditure is justified by an extensive, unusual,
or crucial application of metal roofing.
D. Mock-Up: Before proceeding with final purchase of
materials and fabrication of copper roofing components,
prepare a mock-up of work in location indicated on
Drawings. Incorporate materials and methods of
fabrication and installation identical with project
requirements. Retain accepted mock-up as quality
standard for acceptance of completed copper roofing. If
accepted, mock-up may be incorporated as part of copper
roofing work.
1.7 DELIVERY, STORAGE, AND HANDLING
A. Store copper sheet and coil products, both uncoated and
lead-coated, in dry location and in a manner so as to
preclude the formation of condensation on copper
surfaces.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Provide products manufactured by one of the following:
NOTE ** Names listed below are examples only. Retain or
insert only those manufacturers whose materials
correspond with other requirements and whose
availability and suitability for project
application have been verified.
1. Revere Copper Products, Inc.
2. Hussey Copper, Ltd.
3. Outokumpu American Brass Company.
2.2 MATERIALS
A. Copper Roofing Sheets: Cold-rolled copper sheet
complying with ASTM B 370 temper designation, H00, unless
otherwise indicated, and as follows:
1. Weight: 16 oz. per sq. ft. unless otherwise
indicated.
NOTE ** Delete paragraph above or below as appropriate.
Refer to manufacturers' literature for selection of
thickness appropriate to application indicated.
2. Weight: 20 oz. per sq. ft. unless otherwise
indicated.
NOTE ** Retain below for batten roofing.
B. Batten Caps: 20 oz. per sq. ft. copper unless otherwise
indicated.
NOTE ** Retain paragraph below for lead-coated copper.
C. Lead-Coated Copper Roofing Sheets: Lead-coated copper
sheet complying with ASTM B 101, temper designation H00,
consisting of cold-rolled copper sheet coated both sides
with lead weighing not less than 12 lbs. nor more than 15
lbs. per 100 sq. ft. of copper sheet (one half of total
weight of lead applied each side), and as follows:
1. Weight of Coated Sheet: Not less than 17.1 oz. per
sq. ft. (nominal weight of bare copper sheet, 16
oz.), unless otherwise indicated.
NOTE ** Delete either above or below. Refer to reference
materials; modify if other than Class A used.
2. Weight of Coated Sheet: Not less than 21.2 oz. per
sq. ft. (nominal weight of uncoated copper sheet, 20
oz. per sq. ft.) unless otherwise indicated.
NOTE ** Retain below for batten roofing.
D. Batten Caps: 21.2 oz. per sq. ft. lead-coated copper
unless otherwise indicated.
E. Miscellaneous Materials: Provide materials and types of
fasteners, solder, welding rods, protective coatings,
separators, sealants and accessory items as recommended
by copper sheet manufacturer and fabricator for copper
roofing work, except as otherwise indicated.
NOTE ** Delete paragraph below if joints described are not
required.
F. Expansion Joint Sealant: For hooked-type expansion
joints, which must be free to move, provide nonsetting,
nonhardening, nonmigrating, heavy-bodied polyisobutylene
mastic sealant.
NOTE ** Retain paragraph below for copper and lead coated
copper installed on underlayment sheet.
G. Paper Slip Sheet: Minimum 4-lb. rosin-sized building
paper.
NOTE ** Revise below with specific requirements where
desired for project.
H. Accessories: Except as indicated as work of another
specification section, provide components required for a
complete roof system, including trim, copings, fascias,
ridge closures, clips, seam covers, battens, flashings,
gutters, louvers, sealants, gaskets, and closure strips.
Match materials and finishes of roof.
1. Sealing Tape: Pressure-sensitive 100 percent solids
polyisobutylene compound sealing tape with release
paper backing. Provide permanently elastic, nonsag,
nontoxic, nonstaining tape.
2. Joint Sealant: One-part elastomeric polyurethane,
polysulfide, butyl, or silicone rubber sealant as
recommended by the building manufacturer.
I. Bituminous Coating: Cold-applied asphalt mastic, SSPC-
Paint 12, compounded for 15-mil dry film thickness per
coat, except as otherwise indicated. Provide inert-type
noncorrosive compound, nominally free of sulfur
components and other deleterious impurities.
J. Roofing Felt: Asphalt or coal tar saturated felt
weighing not less than 30 lbs per 100 square feet.
NOTE ** Delete above if alternative underlayment is used.
K. Fabric Underlayment: Manufacturer's standard nonwoven
polyester fabric marketed for use in cold-applied single
ply roof systems, weighing 6.0 oz. per sq. yd., white,
nonswelling, rot and mildew resistant.
1. Product: E-6-N Rufon Fabric; Phillips Fibers Corp.
NOTE ** Retain paragraph below if battens are intended as
part of roofing work.
L. Batten Bars and Strips: If size is not indicated,
provide battens of nominal 2 inch by 2 inch size (1-1/2
inch by 1-1/2 inch minimum).
1. Copper Batten Bars: 20-ounce cold-rolled copper.
NOTE ** Delete if no batten-type roofing requiring wood
strips or if battens are to be specified as part of
Division 6 carpentry work.
2. Wood Batten Strips: Fabricated to size indicated
from lumber complying with requirements of Section
06100 - Rough Carpentry and preservative treated by
pressure process using a chemical solution that is
nonhygroscopic and noncorrosive to type of copper
roofing.
NOTE ** Insert other materials as needed for roofing work
(elastomeric sealants, insulation, solder, reglets,
gaskets, etc.)
M. Nails: Copper or hardware bronze, 0.109 inch minimum not
less than 7/8 inch long barbed with large head.
N. Screws and Bolts: Bronze, brass, or stainless steel.
O. Cleats: 16 ounce cold rolled copper; 2 inches wide x 3
inches long.
P. Solder: ASTM Specification B 32, Composition 50/50
tin/lead; 60/40 tin/lead for lead-coated copper.
Q. Flux: Muriatic acid neutralized with zinc or approved
brand of soldering flux.
2.3 SHOP-FABRICATED UNITS
A. General Metal Fabrication: Shop-fabricate work to
greatest extent possible. Comply with details shown and
with applicable requirements of CDA "Copper in
Architecture Handbook" and other recognized industry
practices. Fabricate for waterproof and weather-
resistant performance with expansion provisions for
running work, sufficient to permanently prevent leakage,
damage, or deterioration of the work. Form work to fit
substrate. Comply with material manufacturer's
instructions and recommendations for forming material.
Form exposed copper work without excessive oil-canning,
buckling, and tool marks, true to line and levels
indicated, with exposed edges folded back to form hems.
B. Seams: Fabricate nonmoving seams in copper sheet with
flat-lock seams. Tin edges to be seamed, form seams, and
solder. Rivet joints for additional strength where
indicated.
C. Expansion Provisions: Where lapped or bayonet-type
expansion provisions in work cannot be used, or would not
be sufficiently water/weatherproof, form expansion joints
of intermeshing hooked flanges, not less than 1 inch
deep, filled with mastic sealant (concealed within
joints).
D. Sealant Joints: Where movable, non-expansion-type joints
are indicated or required for proper performance of work,
form copper to provide for proper installation of
elastomeric sealant, in compliance with CDA standards.
E. Separations: Provide for separation of copper from
noncompatible metal or corrosive substrate by coating
concealed surfaces at locations of contact, with
bituminous coating or other permanent separation as
recommended by manufacturer/fabricator.
PART 3 EXECUTION
NOTE ** Delete any of the following provisions that are not
applicable to the type of roofing required.
3.1 COORDINATION
A. Coordinate copper roofing with rain drainage work,
flashing, trim and construction of decks, parapets,
walls, and other adjoining work to provide a permanently
leakproof, secure, and noncorrosive installation.
3.2 PREPARATION
A. Clean surfaces to receive copper roofing. Substrate to
be smooth and free of defects. Drive all projecting
nails or other fasteners flush with substrate.
3.3 INSTALLATION
A. Manufacturer's Recommendations: Except as otherwise
shown or specified, comply with recommendations and
instructions of manufacturer of copper being fabricated
and installed.
B. Separate dissimilar metals by painting each metal surface
in area of contact with a bituminous coating, by applying
rubberized asphalt underlayment to each metal surface, or
by other permanent separation as recommended by
manufacturers of dissimilar metals.
NOTE ** Most substrate conditions require underlayment and
slip sheets. Delete below only upon recommendation
of metal manufacturer for specific project
conditions.
C. Install underlayment and paper slip sheet on substrate
under copper roofing to greatest extent possible unless
otherwise recommended by manufacturer of sheet metal.
Paper slip sheets must be installed over the
underlayment. Use adhesive for temporary anchorage,
where possible, to minimize use of mechanical fasteners
under copper roofing. Lap joints 2 inches minimum.
D. Form and fabricate sheets, seams, strips, cleats,
valleys, ridges, edge treatments, integral flashings and
other components of copper roofing to profiles, patterns
and drainage arrangements shown and as required for
permanently leakproof construction. Provide for thermal
expansion and contraction of the work, as indicated.
Seal joints as shown and as required for leakproof
construction. Shop-fabricate materials to greatest
extent possible.
E. Sealant-Type Joints: Where sealant-filled joints are
used, embed hooked flanges of joint members not less than
1 in. into sealant. Form joints to conceal sealant
completely. When ambient temperature is moderate at time
of installation, 40 degrees to 70 degrees F (4 degrees
to 21 degrees C), set joint members for 50 percent
movement either way. Adjust setting proportionately for
installation at higher ambient temperatures. Do not
install sealant-type joints at temperatures below 40
degrees F (4 degrees C). Comply with requirements of
Section 07900 for handling and installing sealants.
F. Fabricate and install work with lines and corners of
exposed units true and accurate. Form exposed faces flat
and free of buckles, excessive waves, and avoidable tool
marks considering temper and reflectivity of metal.
Provide uniform, neat seams with minimum exposure of
solder, welds, and sealant. Except as otherwise shown,
fold back sheet metal to form a hem on concealed side of
exposed edges.
G. Conceal fasteners and expansion provisions where possible
in exposed work, and locate so as to minimize possibility
of leakage. Cover and seal fasteners and anchors as
required for a tight installation.
H. Tin uncoated copper surfaces at edges of sheets to be
soldered, for a width of 1-1/2 inches, using solder
recommended for copper work. Where surfaces to be
soldered are lead-coated, do not tin the edges, but wire
brush lead coating before soldering.
3.4 CLEANING
A. Remove protective film (if any) from exposed surfaces of
copper roofing promptly upon installation. Strip with
care to avoid damage to finishes.
B. Clean exposed metal surfaces of substances that would
interfere with uniform oxidation and weathering.
NOTE ** Delete provisions below if copper will be allowed
to weather naturally.
3.5 FINISHING
NOTE ** Review paint selection with coatings manufacturer.
A. To retard natural weathering, apply a uniform coating of
high grade paraffin oil or a clear lacquer coating.
3.6 PROTECTION
A. Provide final protection in a manner acceptable to
installer that ensures that copper roofing is without
damage or deterioration at time of Substantial
Completion.
END OF SECTION