HomeMy WebLinkAbout076200 sheet metal flashing and trim.pdf Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 1
SECTION 076200 - SHEET METAL FLASHING AND TRIM
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Reglets with counterflashing.
2. Formed roof-drainage sheet metal fabrications.
3. Formed low-slope roof sheet metal fabrications.
1.2 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. LEED Submittals:
1. Product Data for Credit MR 4: For products having recycled content, documentation
indicating percentages by weight of postconsumer and preconsumer recycled content.
Include statement indicating cost for each product having recycled content.
C. Shop Drawings: For sheet metal flashing and trim.
1. Include plans, elevations, sections, and attachment details.
2. Distinguish between shop- and field-assembled work.
3. Include identification of finish for each item.
4. Include pattern of seams and details of termination points, expansion joints and
expansion-joint covers, direction of expansion, roof-penetration flashing, and connections
to adjoining work.
D. Samples: For each exposed product and for each color and texture specified.
1.3 INFORMATIONAL SUBMITTALS
A. Product certificates.
B. Product test reports.
C. Sample warranty.
1.4 CLOSEOUT SUBMITTALS
A. Maintenance data.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 2
1.5 QUALITY ASSURANCE
A. Fabricator Qualifications:
1. Employs skilled workers who custom fabricate sheet metal flashing and trim similar to
that required for this Project and whose products have a record of successful in-service
performance.
2. For copings and roof edge flashings that are SPRI ES-1 tested, shop shall be listed as able
to fabricate required details as tested and approved.
1.6 WARRANTY
A. Special Warranty on Finishes: Manufacturer agrees to repair finish or replace sheet metal
flashing and trim that shows evidence of deterioration of factory-applied finishes within
specified warranty period.
B. Finish Warranty Period: 10 years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. General: Sheet metal flashing and trim assemblies shall withstand wind loads, structural
movement, thermally induced movement, and exposure to weather without failure due to
defective manufacture, fabrication, installation, or other defects in construction. Completed
sheet metal flashing and trim shall not rattle, leak, or loosen, and shall remain watertight.
B. Sheet Metal Standard for Flashing and Trim: Comply with NRCA's "The NRCA Roofing
Manual" and SMACNA's "Architectural Sheet Metal Manual" requirements for dimensions and
profiles shown unless more stringent requirements are indicated.
C. SPRI Wind Design Standard:
1. Manufacture and install copings and roof edge flashings tested according to SPRI ES-1
and capable of resisting the following design pressure:
2. Design Pressure: As indicated on Drawings.
D. Thermal Movements:
1. Allow for thermal movements from ambient and surface temperature changes.
2. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.
2.2 SHEET METALS
A. General: Protect mechanical and other finishes on exposed surfaces from damage by applying
strippable, temporary protective film before shipping.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 3
B. Aluminum Sheet: ASTM B 209, alloy as standard with manufacturer for finish required, with
temper as required to suit forming operations and performance required.
1. Exposed Coil-Coated Finish: Three-Coat Fluoropolymer: AAMA 620. Fluoropolymer
finish containing not less than 70 percent PVDF resin by weight in both color coat and
clear topcoat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply
with coating and resin manufacturers' written instructions.
2. Color: Match Firestone Sandstone Color.
C. Metallic-Coated Steel Sheet: Provide zinc-coated (galvanized) steel sheet according to
ASTM A 653/A 653M, G90 coating designation; prepainted by coil-coating process to comply
with ASTM A 755/A 755M.
1. Exposed Coil-Coated Finish:
a. Three-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less
than 70 percent PVDF resin by weight in both color coat and clear topcoat.
Prepare, pretreat, and apply coating to exposed metal surfaces to comply with
coating and resin manufacturers' written instructions.
2. Color: Match Firestone Sandstone Color.
2.3 MISCELLANEOUS MATERIALS
A. General: Provide materials and types of fasteners, solder, protective coatings, sealants, and other
miscellaneous items as required for complete sheet metal flashing and trim installation and as
recommended by manufacturer of primary sheet metal or manufactured item unless otherwise
indicated.
B. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and
bolts, and other suitable fasteners designed to withstand design loads and recommended by
manufacturer of primary sheet metal or manufactured item.
1. General: Blind fasteners or self-drilling screws, gasketed, with hex-washer head.
a. Exposed Fasteners: Heads matching color of sheet metal using plastic caps or
factory-applied coating. Provide metal-backed EPDM or PVC sealing washers
under heads of exposed fasteners bearing on weather side of metal.
b. Blind Fasteners: High-strength aluminum or stainless-steel rivets suitable for metal
being fastened.
c. Spikes and Ferrules: Same material as gutter; with spike with ferrule matching
internal gutter width.
2. Fasteners for Aluminum Sheet: Aluminum or Series 300 stainless steel.
C. Sealant Tape: Pressure-sensitive, 100 percent solids, polyisobutylene compound sealant tape
with release-paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape 1/2
inch wide and 1/8 inch thick.
D. Elastomeric Sealant: ASTM C 920, elastomeric polymer sealant; of type, grade, class, and use
classifications required to seal joints in sheet metal flashing and trim and remain watertight.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 4
E. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;
polyisobutylene plasticized; heavy bodied for hooked-type expansion joints with limited
movement.
F. Epoxy Seam Sealer: Two-part, noncorrosive, aluminum seam-cementing compound,
recommended by aluminum manufacturer for exterior nonmoving joints, including riveted
joints.
G. Bituminous Coating: Cold-applied asphalt emulsion according to ASTM D 1187.
2.4 FABRICATION, GENERAL
A. General: Custom fabricate sheet metal flashing and trim to comply with details shown and
recommendations in cited sheet metal standard that apply to design, dimensions, geometry,
metal thickness, and other characteristics of item required. Fabricate sheet metal flashing and
trim in shop to greatest extent possible.
1. Obtain field measurements for accurate fit before shop fabrication.
2. Form sheet metal flashing and trim to fit substrates without excessive oil canning,
buckling, and tool marks; true to line, levels, and slopes; and with exposed edges folded
back to form hems.
3. Conceal fasteners and expansion provisions where possible. Do not use exposed fasteners
on faces exposed to view.
B. Expansion Provisions: Form metal for thermal expansion of exposed flashing and trim.
1. Form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled
with butyl sealant concealed within joints.
2. Use lapped expansion joints only where indicated on Drawings.
C. Sealant Joints: Where movable, nonexpansion-type joints are required, form metal to provide
for proper installation of elastomeric sealant according to cited sheet metal standard.
D. Fabricate cleats and attachment devices of sizes as recommended by cited sheet metal standard
for application, but not less than thickness of metal being secured.
E. Seams for Aluminum: Fabricate nonmoving seams with flat-lock seams. Form seams and seal
with epoxy seam sealer. Rivet joints where necessary for strength.
2.5 ROOF-DRAINAGE SHEET METAL FABRICATIONS
A. Hanging Gutters: Fabricate to cross section required, complete with end pieces, outlet tubes, and
other accessories as required. Fabricate in minimum 96-inch- long sections. Furnish flat-stock
gutter brackets and gutter spacers and straps, of size recommended by cited sheet metal standard
but with thickness not less than twice the gutter thickness. Fabricate expansion joints,
expansion-joint covers, and gutter accessories from same metal as gutters. Shop fabricate
interior and exterior corners.
1. Color: Match Firestone “Sandstone” color.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 5
B. Parapet Scuppers: Fabricate scuppers to dimensions required, with closure flange trim to
exterior, 4-inch wide wall flanges to interior, and base extending 4 inches beyond cant or
tapered strip into field of roof.
C. Conductor Heads: Fabricate conductor heads with flanged back and stiffened top edge and of
dimensions and shape required, complete with outlet tubes.
1. Color: Match Firestone “Sandstone” color.
D. Downspouts: Fabricate rectangular downspouts from aluminum, to dimensions indicated,
complete with mitered elbows. Furnish with metal hangers from same material as downspouts
and anchors.
1. Color: Match Firestone Sandstone color.
2.6 LOW-SLOPE ROOF SHEET METAL FABRICATIONS
A. General: Sheet metal thicknesses as indicated on Drawings.
B. Roof Edge Flashing (Gravel Stop) and Fascia Cap: Fabricate from aluminum, in minimum 96-
inch- long, but not exceeding 12-foot- long sections. Furnish with 6-inch- wide, joint cover
plates. Shop fabricate interior and exterior corners.
1. Color: Match Firestone “Sandstone” color.
C. Copings: Fabricate from aluminum, in minimum 96-inch- long, but not exceeding 12-foot- long,
sections. Fabricate joint plates of same thickness as copings. Furnish with continuous cleats to
support edge of external leg and interior leg. Miter corners, fasten and seal solder or weld
watertight. Shop fabricate interior and exterior corners.
1. Color: Match Firestone “Sandstone” color.
D. Base Flashing: Fabricate from aluminum.
E. Counterflashing and Flashing Receivers: Fabricate from aluminum.
PART 3 - EXECUTION
3.1 INSTALLATION, GENERAL
A. General: Anchor sheet metal flashing and trim and other components of the Work securely in
place, with provisions for thermal and structural movement. Use fasteners, solder, protective
coatings, separators, sealants, and other miscellaneous items as required to complete sheet metal
flashing and trim system.
1. Install sheet metal flashing and trim true to line, levels, and slopes. Provide uniform, neat
seams with minimum exposure of solder, welds, and sealant.
2. Install sheet metal flashing and trim to fit substrates and to result in watertight
performance. Verify shapes and dimensions of surfaces to be covered before fabricating
sheet metal.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 6
3. Space cleats not more than 12 inches apart. Attach each cleat with at least two fasteners.
Bend tabs over fasteners.
4. Install exposed sheet metal flashing and trim with limited oil canning, and free of
buckling and tool marks.
5. Torch cutting of sheet metal flashing and trim is not permitted.
B. Metal Protection: Where dissimilar metals contact each other, or where metal contacts pressure-
treated wood or other corrosive substrates, protect against galvanic action or corrosion by
painting contact surfaces with bituminous coating or by other permanent separation as
recommended by sheet metal manufacturer or cited sheet metal standard.
1. Coat concealed side of uncoated-aluminum sheet metal flashing and trim with bituminous
coating where flashing and trim contact wood, ferrous metal, or cementitious
construction.
2. Underlayment: Where installing sheet metal flashing and trim directly on cementitious or
wood substrates, install underlayment and cover with slip sheet.
C. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space
movement joints at maximum of 10 feet with no joints within 24 inches of corner or
intersection.
1. Form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled
with sealant concealed within joints.
2. Use lapped expansion joints only where indicated on Drawings.
D. Fasteners: Use fastener sizes that penetrate substrate not less than recommended by fastener
manufacturer to achieve maximum pull-out resistance.
E. Conceal fasteners and expansion provisions where possible in exposed work and locate to
minimize possibility of leakage. Cover and seal fasteners and anchors as required for a tight
installation.
F. Seal joints as required for watertight construction. Prepare joints and apply sealants to comply
with requirements in Section 079200 "Joint Sealants."
G. Rivets: Rivet joints in uncoated aluminum where necessary for strength.
3.2 ROOF-DRAINAGE SYSTEM INSTALLATION
A. General: Install sheet metal roof-drainage items to produce complete roof-drainage system
according to cited sheet metal standard unless otherwise indicated. Coordinate installation of
roof perimeter flashing with installation of roof-drainage system.
B. Hanging Gutters:
1. Join sections with riveted and soldered joints or joints sealed with sealant. Provide for
thermal expansion. Attach gutters at eave or fascia to firmly anchor them in position.
Provide end closures and seal watertight with sealant. Slope to downspouts.
2. Install gutter with expansion joints at locations indicated, but not exceeding, 50 feet apart.
Install expansion-joint caps.
Giant Eagle Market #6550 The Bridges, Carmel, Indiana
Building Shell Bid & Permit
DLA Project 2014040.00
August 12, 2014
SHEET METAL FLASHING AND TRIM 076200 - 7
C. Downspouts: Join sections with 1-1/2-inch telescoping joints. Provide hangers with fasteners
designed to hold downspouts securely to walls. Locate hangers at top and bottom and at
approximately 60 inches o.c.
D. Expansion-Joint Covers: Install expansion-joint covers at locations and of configuration
indicated. Lap joints minimum of 4 inches in direction of water flow.
3.3 ROOF FLASHING INSTALLATION
A. General: Install sheet metal flashing and trim to comply with performance requirements, sheet
metal manufacturer's written installation instructions, and cited sheet metal standard. Provide
concealed fasteners where possible, and set units true to line, levels, and slopes. Install work
with laps, joints, and seams that are permanently watertight and weather resistant.
B. Roof Edge Flashing: Anchor to resist uplift and outward forces according to recommendations
in cited sheet metal standard unless otherwise indicated. Interlock bottom edge of roof edge
flashing with continuous cleat anchored to substrate.
C. Copings: Anchor to resist uplift and outward forces according to recommendations in cited
sheet metal standard unless otherwise indicated.
D. Counterflashing: Coordinate installation of counterflashing with installation of base flashing.
Insert counterflashing in reglets or receivers and fit tightly to base flashing. Extend
counterflashing 4 inches over base flashing. Lap counterflashing joints minimum of 4 inches.
3.4 CLEANING AND PROTECTION
A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and
weathering.
B. Clean off excess sealants.
C. Remove temporary protective coverings and strippable films as sheet metal flashing and trim
are installed unless otherwise indicated in manufacturer's written installation instructions.
END OF SECTION 076200