USACE / NAVFAC / AFCESA / NASA UFGS-07 61 01 (April 2006)
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Preparing Activity: USACE Replacing without change
UFGS-07610 (January 2004)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 07 61 01
COPPER ROOF SYSTEM
04/06
NOTE: This guide specification covers the requirements for copper roof system
applied to solid roof decking.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
PART 1 GENERAL
NOTE: This guide specification will be used in the preparation of project specifications
for flat-seam, standing-seam, batten-seam, or custom-design type copper roofing
installed over a substrate. The structural adequacy of the supporting system
will be established prior to design of copper roof system.
Drawings will show scope of sheet metalwork and structural framing system, including
type of decking and blocking, type of fire-retardant materials (if used), type
and details of seams, and design requirements. When this specification is used
for onsite fabricated copper roof, the Contractor may not be able to verify
performance criteria such as wind uplift. In such cases, drawing details of
proven reliability and SMACNA recommended guidelines should be used and specified.
Copper roof systems in cold climates subjected to high snow accumulation must
include snow guards, steep slopes (generally 6 on 12), and other approved details.
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ASTM INTERNATIONAL (ASTM)ASTM B 32(2008) Standard Specification for Solder MetalASTM B 370(2003) Standard Specification for Copper Sheet and Strip for Building ConstructionASTM D 226(2006) Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and WaterproofingASTM D 4397(2008) Standard Specification for Polyethylene Sheeting for Construction, Industrial, and Agricultural ApplicationsASTM E 72(2005) Conducting Strength Tests of Panels for Building Construction][COPPER DEVELOPMENT ASSOCIATION (CDA)CDA 4115(online) Copper in Architecture]1.2 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are for [Contractor Quality Control approval.][information only. When used, a designation following the "G"
designation identifies the office that will review the submittal for the Government.] The following shall be
submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Copper Roof System[; G][; G, [_____]]
Design and erection drawings containing data necessary to clearly describe design, materials,
sizes, layouts, seam configuration, construction details, provisions for thermal movement, line
of panels, fastener sizes and spacings, sealants and installation procedures.
SD-03 Product Data
Sealant
Descriptive information.
Qualifications
Qualifications of the manufacturer, installer, and field representative.
SD-04 Samples
Accessories[; G][; G, [_____]]
One sample of each type of flashing, trim, closure, cap and similar items. Size shall be
sufficient to show construction and configuration.
Roof Panels
One piece 225 mm 9 inches long, full width.
Fasteners[; G][; G, [_____]]
Two samples of each type to be used, with statement regarding intended use. If so requested,
random samples of each type of fastener, as delivered to the project site shall be taken in
the presence of the Contracting Officer and provided to the Contracting Officer.
Concealed anchor clips[; G][; G, [_____]]
Two samples of each type.
SD-06 Test Reports
Field Testing[; G][; G, [_____]]
Test reports for uplift resistance of the copper roof system.
SD-07 Certificates
Copper Roof System
Certification that materials used in the copper roof system meet specified requirements.
1.3 DESIGN REQUIREMENTS
Copper shall be formed to provide proper installation of elastomeric sealants. Expansion joints shall be formed
of intermeshing hooked flanges not less than 25 mm 1 inch deep in accordance with CDA 4115.
1.3.1 Wind Uplift Loads
NOTE: Select the basic wind speed value from UFC 3-310-01. The importance
and exposure factors will be obtained from ASCE 7.
The design uplift pressures for the roof system shall be computed and applied using a basic wind speed of [_____]
km miles per hour (fastest km mile), an importance factor of [_____], and an exposure factor of [_____]. The
design uplift force for each connection assembly shall be that pressure given for the area under consideration,
multiplied by the tributary load area of the connection assembly, and multiplied by the appropriate factor of
safety, as follows:
a. Single fastener in each connection .........3.0
b. Two or more fasteners in each connection ...2.25
1.3.2 Panel and Clip Design
Panel and clip strength characteristics such as panel buckling strength, panel stiffness, side joint strength
and clip/side joint shall meet requirements of ASTM E 72. The clip-to-substrate fastener selection shall incorporate
a safety factor of 3.0 based on ultimate pull-out strength. Selection must consider the pry effect which the
outstanding leg of clip exerts on the fastener. End-laps shall be designed for thermal movement. Concealed
anchor clips shall be used.
1.3.3 Provisions for Expansion
NOTE: Select appropriate temperature range based on effects of direct sun and
general climatic conditions of the project site.
Copper roof panels shall be free to move in response to the expansion and contraction forces resulting from a
total [110] [_____] degrees C [200] [_____] degrees F temperature range during the life of the structure.
1.4 QUALIFICATIONS
1.4.1 Manufacturer
Copper roof system shall be the product of a recognized copper roof system manufacturer who has been in the practice
of manufacturing copper roof systems for a period of not less than [10] [_____] years and has been involved in
at least 5 projects similar in size and complexity to this project.
1.4.2 Installer
The installer shall be skilled in the installation of the type of copper roof system required for this project,
shall have a minimum of [10] [_____] years of experience, and shall have been involved in installing at least
3 projects that are of comparable size, scope and complexity as this project for the particular roof system furnished.
1.4.3 Manufacturer's Representative
A representative of the copper roof system manufacturer, who is familiar with the design of the roof system supplied
and experienced in the erection of roof systems similar in size to the one required under this contract, shall
be present at the project site during installation of the copper roof to ensure that the roof system meets the
contract requirements.
1.5 MOCK-UPS
NOTE: Complexity of work and scope of quality control should be carefully evaluated
before requiring Contractor to construct a mock-up. Delete paragraph if mock-up
is not required.
Before proceeding with final purchase of materials and fabrication of copper roofing components, a mock-up of
the work shall be constructed at the site. Roof mock-up shall be constructed in the size and location directed,
and shall include at least one example of each critical detail (ridge, hip, valley, etc.) included in the project.
The approved mock-up will establish the minimum standard of quality required for copper roofing work.
1.6 DELIVERY, STORAGE AND HANDLING
Materials shall be delivered to the project site in a dry and undamaged condition and shall be stored out of
contact with the ground. Materials shall be covered with weathertight coverings and kept dry. Storage accommodations
for materials shall provide good air circulation and protection from twisting, bending, abrasion, discoloration
or staining.
1.7 WARRANTY
The copper roofing installation shall be warranted for a period of 20 years against blow-off and leakage arising
out of or caused by ordinary wear and tear by the elements. A sign shall be permanently attached to the building
at the most likely roof access point advising of the existence of the warranty. The warranty shall start upon
final acceptance of the work or the date the Government takes possession, whichever is earlier. The warranty
shall guarantee that the design, detailing, materials, and accessories used for roofing work are approved by
the roofing manufacturer and installed in accordance with specifications, drawings and other documents approved
by manufacturer prior to installation.
PART 2 PRODUCTS
2.1 ROOF PANELS
Roofing sheets shall be cold-rolled copper sheets conforming to ASTM B 370 temper designation, H00, minimum 4.9
kg per square meter 16 ounces per square foot containing 99.9 percent copper. Copper roof panels shall be factory-fabricated
in accordance with approved drawings and CDA 4115 recommendations. Sections shall be formed true to shape in
the longest practical lengths, accurate in size and free of distortion and defects. Exposed edges shall be hemmed
on underside. Exposed copper work shall be fabricated without excessive oil-canning, buckling, and tool marks.
2.2 ACCESSORIES
Components required for a complete roofing system, including [trim,] [copings,] [fascias,] [corner units,] [ridge
closures,] [clips,] [gutters,] [closure strips,] and similar items shall be factory fabricated. Clip bases shall
have factory punched or drilled holes for attachment. Clips used with panel width greater than 305 mm 12 inches
shall be made from multiple pieces with the allowance for the total thermal movement required to take place
within the clip. Cleats shall be interlockable with the panels and shall be of type and size to meet design
requirements. Accessories shall be fabricated of type and thickness of sheet copper complying with CDA 4115.
2.3 SOLDER AND FLUX
Copper solder shall conform to ASTM B 32. Flux shall be rosin, muriatic acid neutralized with zinc or an approved
soldering paste.
2.4 SLIP SHEETS
Slip sheets shall be smooth rosin-sized unsaturated building paper weighing a minimum of 295 grams per square
meter 6 pounds per 100 square feet. Sheets shall be attached with approved fasteners. Slip sheets shall be
applied over vapor retarder, where applicable.
2.5 VAPOR RETARDER
NOTE: Vapor retarder requirements will be shown on the drawings when required
for local climatic conditions. In northern climates, where ice and snow are
considerations, a waterproof secondary membrane may be specified. Delete this
paragraph if not required.
Vapor retarder shall be [non-perforated asphalt-saturated organic roofing felts conforming to ASTM D 226, Type
II (No. 30).] [polyethylene sheeting conforming to ASTM D 4397. A fully compatible tape shall be provided which
has equal or better water vapor control characteristics than the vapor retarder material.]
2.6 BITUMINOUS COATING
Bituminous coating shall be cold-applied inert-type noncorrosive compound, nominally free of sulfur components
and other deleterious impurities.
2.7 SEALANT
Sealant shall be in accordance with CDA 4115 and manufacturer's recommendations.
2.8 FASTENERS
NOTE: For projects in hurricane areas, edit this paragraph to provide the higher
quality fastener types recommended.
Fasteners in contact with copper shall be copper, brass or Series 300 stainless steel. Fasteners shall be capable
of resisting the specified wind uplift and shall allow for movement of roof panel system. Exposed fasteners
shall be copper and shall only be used at batten caps and closures.
PART 3 EXECUTION
3.1 INSTALLATION
NOTE: Lumber and plywood in contact with copper will be non-treated or have
a "non-corrosive" fire-retardant treatment.
Copper shall be separated from noncompatible metal and corrosive substrates with permanent type separators recommended
by manufacturer. Roofing panels, flashings and related accessories shall be installed with approved fasteners
in accordance with approved drawings and CDA 4115. Roofing components shall be set true to line and shall accurately
fit together to form leak-proof joints. Panels shall be folded back to form a hem on concealed side of exposed
edges. Exposed surfaces shall be formed flat and free of buckles, waves, and tool marks. Provision shall be
made for thermal expansion and contraction. Seams shall be uniform and neat with minimum of solder, welds and
sealant. Fasteners and expansion provisions shall be concealed where possible in exposed work. Field-cutting
of panels by torch is not permitted.
3.1.1 Tolerances
Panels shall be shimmed and aligned within a tolerance of 9 mm in 12 meters 3/8 inch in 40 feet vertically and
horizontally and within 3 mm 1/8 inch offset of adjoining surfaces and of vertical alignment of matching profiles.
3.1.2 Substrates
Concrete substrates shall be made smooth with a wash of neat cement or with a heavy application of bituminous
coating. If concrete is not nailable, nailable inserts shall be set into the concrete. Substrates shall be
clean, smooth, sound, dry, and free of defects and projections which might affect the installation. Projecting
nails and other types of fasteners shall be secure and flush with substrate. Roof openings, pipes, vents, and
other roof penetrations shall be securely set in place.
3.1.3 Vapor Retarder
NOTE: Delete this paragraph if vapor retarder is not required. If vapor retarder
is required keep the appropriate brackets for roofing felts or polyethylene.
[Roofing felts shall be installed in accordance with manufacturer's recommendations.] [A single ply of 0.254
mm 10 mil polyethylene sheet or, at the Contractor's option, a double ply of 0.152 mm 6 mil polyethylene sheet
shall be installed over the entire support surface. Tape shall be used to seal the edges of the sheets to the
support surface, or to the sheet below. Sheet edges shall be lapped not less than 150 mm 6 inches. Sufficient
material shall be provided to avoid inducing stresses in the sheets due to stretching or binding. All tears
or punctures that are visible in the finished surface at any time during the construction process shall be sealed
with the tape.]
3.1.4 Slip Sheets
NOTE: Slip sheets are required for all installations. Slip sheets must be
installed over vapor retarder when vapor retarder is specified.
Slip sheets shall be installed with joints overlapped a minimum of 50 mm 2 inches, and shall be secured with
approved fasteners.
3.2 FIELD TESTING
NOTE: Field testing may not be required for all projects. Delete if not required.
[_____] random fastener pull tests shall be conducted in areas designated by the Contracting Officer. Fasteners
for structural connections shall provide tensile and shear strength of not less than 3.3 kN 750 pounds per fastener.
3.3 CLEANING
Upon completion of copper roofing work, grease and oil films, excess sealants and handling marks shall be removed
and the work shall be cleaned in accordance with manufacturer's recommendations. Copper surfaces shall be cleaned
of substances that would interfere with uniform oxidation and weathering. Exposed copper surfaces shall be free
of dents, creases, waves, scratch marks, and solder or weld marks.
3.4 PROTECTION
Copper roofing work shall be protected to ensure the work is without damage or deterioration. Roof panels and
other components which have been damaged or have deteriorated beyond successful repair shall be replaced with
new copper sheet metalwork. Storing, walking, wheeling or trucking directly on completed copper roofing work
is not permitted. When required, temporary walkways, runways and platforms fabricated of smooth clean boards
shall be used to avoid damage to completed copper work. Copper roofing work shall be maintained in a clean condition
until final acceptance.