UFGS_07_60_00-Flashing_and_Sheet_Metal.docx

SECTION TABLE OF CONTENTS

DIVISION 07 - THERMAL AND MOISTURE PROTECTION SECTION 07 60 00

FLASHING AND SHEET METAL

PART 1 GENERAL

1.1 REFERENCES

1.2 GENERAL REQUIREMENTS

1.3 SUBMITTALS

1.4 MISCELLANEOUS REQUIREMENTS

1.4.1 Product Data

1.4.2 Finish Samples

1.4.3 Operation and Maintenance Data

1.5 DELIVERY, HANDLING, AND STORAGE PART 2 PRODUCTS

2.1 RECYCLED CONTENT

2.2 MATERIALS

2.2.1 Exposed Sheet Metal Items

2.2.2 Drainage

2.2.3 Copper, Sheet and Strip

2.2.4 Lead-Coated Copper Sheet

2.2.5 Lead Sheet

2.2.6 Steel Sheet, Zinc-Coated (Galvanized)

2.2.7 Zinc Sheet and Strip

2.2.8 Stainless Steel

2.2.9 Finishes

2.2.10 Aluminum Alloy, Extruded Bars, Rods, Shapes, and Tubes

2.2.11 Solder

2.2.12 Reglets

2.2.12.1 Metal Reglets

2.2.12.1.1 Caulked Reglets

2.2.13 Scuppers

2.2.14 Copings

2.2.15 Bituminous Plastic Cement

2.2.16 Roofing Felt

2.2.17 Asphalt Primer

2.2.18 Fasteners PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Nailing

3.1.2 Bolts, Rivets, and Screws

3.1.3 Welding and Mechanical Fastening

3.1.3.1 Welding of Aluminum

3.1.4 Protection from Contact with Dissimilar Materials

3.1.4.1 Copper or Copper-bearing Alloys

3.1.4.2 Aluminum

3.1.4.3 Metal Surfaces

3.1.4.4 Wood or Other Absorptive Materials

3.1.5 Base Flashing

3.1.6 Counterflashing

3.1.7 Metal Reglets

3.1.7.1 Caulked Reglets

3.1.7.2 Friction Reglets

3.1.8 Flashing for Roof Drains

3.1.9 Scuppers

3.2 PAINTING

3.2.1 Aluminum Surfaces

3.3 CLEANING

3.4 REPAIRS TO FINISH

3.5 FIELD QUALITY CONTROL

3.5.1 Procedure

-- End of Section Table of Contents --

SECTION 07 60 00

Page

SECTION 07 60 00 FLASHING AND SHEET METAL

03/27/19

PART 1 GENERAL

1.1 REFERENCES

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.

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (ASHRAE)

ASHRAE 189.1 (2014) Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

ASHRAE 90.1 - IP (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 90.1 - SI (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

AMERICAN WELDING SOCIETY (AWS)

AWS D1.2/D1.2M (2014) Structural Welding Code - Aluminum

ASTM INTERNATIONAL (ASTM)

ASTM A308/A308M (2010) Standard Specification for Steel Sheet, Terne (Lead-Tin Alloy) Coated by the Hot Dip Process

ASTM A480/A480M (2018a) Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

ASTM A653/A653M (2017) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM B101 (2012) Standard Specification for Lead-Coated Copper Sheet and Strip for Building Construction

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B209M (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)

ASTM B221 (2014) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B221M (2013) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

ASTM B32 (2008; R 2014) Standard Specification for Solder Metal

ASTM B370 (2012) Standard Specification for Copper Sheet and Strip for Building Construction

ASTM B69 (2013) Standard Specification for Rolled Zinc

ASTM C1549 (2016) Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer

ASTM D1784 (2011) Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

ASTM D226/D226M (2017) Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

ASTM D41/D41M (2011; R 2016) Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

ASTM D4586/D4586M (2007; E 2012; R 2012) Asphalt Roof Cement, Asbestos-Free

ASTM E1918 (2016) Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field

ASTM E1980 (2011) Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces

ASTM E408 (2013) Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques

ASTM E971 (2011) Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION (SMACNA)

SMACNA 1793 (2012) Architectural Sheet Metal Manual, 7th Edition

SINGLE PLY ROOFING INDUSTRY (SPRI)

ANSI/SPRI RD-1 (2014) Performance Standard for Retrofit Drains

U.S. DEPARTMENT OF ENERGY (DOE)

Energy Star (1992; R 2006) Energy Star Energy Efficiency Labeling System (FEMP)

1.2 GENERAL REQUIREMENTS

Finished sheet metal assemblies must form a weathertight enclosure without waves, warps, buckles, fastening stresses or distortion, while allowing for expansion and contraction without damage to the system. The sheet metal installer is responsible for cutting, fitting, drilling, and other operations in connection with sheet metal modifications required to accommodate the work of other trades. Coordinate installation of sheet metal items used in conjunction with roofing with roofing work to permit continuous, uninterrupted roofing operations.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The “AE” designation identifies the office as that of the Architect or Engineer. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings Flashing for Roof Drains; G, AE Base Flashing; G, AE Counterflashing; G, AE Flashing at Roof Penetrations and Equipment Supports; G, AE Reglets; G, AE Scuppers; G, AE Copings; G, AE Drip Edges; G, AE Conductor Heads; G, AE Recycled Content; S

SD-04 Samples Finish Samples; G, AE

SD-08 Manufacturer's Instructions Instructions for Installation; G, AE Quality Control Plan; G, AE

SD-10 Operation and Maintenance Data Cleaning and Maintenance; G, AE

1.4 MISCELLANEOUS REQUIREMENTS

1.4.1 Product Data

Indicate thicknesses, dimensions, fastenings, anchoring methods, expansion joints, and other provisions necessary for thermal expansion and contraction. Scaled manufacturer's catalog data may be submitted for factory fabricated items.

1.4.2 Finish Samples

Submit two color charts and two finish sample chips from manufacturer's standard color and finish options for each type of finish indicated.

1.4.3 Operation and Maintenance Data

Submit detailed instructions for installation and quality control during installation, cleaning and maintenance, for each type of assembly indicated.

1.5 DELIVERY, HANDLING, AND STORAGE

Package and protect materials during shipment. Uncrate and inspect materials for damage, dampness, and wet-storage stains upon delivery to the job site. Remove from the site and replace damaged materials that cannot be restored to like-new condition. Handle sheet metal items to avoid damage to surfaces, edges, and ends. Store materials in dry, weather-tight, ventilated areas until installation.

PART 2 PRODUCTS

2.1 RECYCLED CONTENT

Provide products with recycled content. Provide data for each product with recycled content, identifying percentage of recycled content.

2.2 MATERIALS

Do not use lead, lead-coated metal, or galvanized steel. Use any metal listed by SMACNA 1793 for a particular item, unless otherwise indicated. Provide materials, thicknesses, and configurations in accordance with SMACNA 1793 for each material. Different items need not be of the same metal, except that contact between dissimilar metals must be avoided.

2.2.1 Exposed Sheet Metal Items

Must be of the same material. Consider the following as exposed sheet metal: gutters, including hangers; downspouts; gravel stops and fascia; cap, valley, steeped, base, and eave flashings and related accessories.

2.2.2 Drainage

Do not use copper for an exposed item if drainage from that item will pass over exposed masonry, stonework or other metal surfaces.

2.2.3 Copper, Sheet and Strip

Provide in accordance with ASTM B370, cold-rolled temper, H 00 (standard).

2.2.4 Lead-Coated Copper Sheet

Provide in accordance with ASTM B101.

2.2.5 Lead Sheet

Provide in a minimum weight of 19.6 kilograms per square meter 4 pounds per square foot.

2.2.6 Steel Sheet, Zinc-Coated (Galvanized)

Provide in accordance with ASTM A653/A653M.

2.2.7 Zinc Sheet and Strip

Provide in accordance with ASTM B69, Type I, a minimum of 0.61 mm 0.024 inch thick.

2.2.8 Stainless Steel

Provide in accordance with ASTM A480/A480M, Type 302 or 304, 2D Finish, fully annealed, dead-soft temper.

2.2.9 Finishes

Provide exposed exterior sheet metal and aluminum with a baked on, factory applied color coating of polyvinylidene fluoride (PVF2) or approved equal fluorocarbon coating. Dry film thickness of coatings must be 0.020 to 0.033 mm 0.8 to 1.3 mils. Color to be selected from manufacturer's standard range of color choices. Field applications of color coatings are prohibited and will be rejected.

2.2.10 Aluminum Alloy, Extruded Bars, Rods, Shapes, and Tubes Provide in accordance with ASTM B221MASTM B221.

2.2.11 Solder

Provide in accordance with ASTM B32, 95-5 tin-antimony.

2.2.12 Reglets

2.2.12.1 Metal Reglets

Provide factory fabricated caulked type or friction type reglets with a minimum opening of 6 mm 1/4 inch and a depth of 30 mm 1-1/4 inch, as approved.

2.2.12.1.1 Caulked Reglets

Provide with rounded edges, temporary reinforcing cores, and accessories as required for securing to adjacent construction. Provide built-up mitered corner pieces for inside and outside corners.

2.2.13 Scuppers

Line interiors of scupper openings with sheet metal. Provide a drip edge at bottom edges with returns of not less than 25 mm one inch against the face of the outside wall at the top and sides. Provide the perimeter of the lining approximately 13 mm 1/2 inch less than the perimeter of the scupper.

2.2.14 Coping

Unless otherwise indicated, provide copings in copper sheets, 2400 or 3000 mm 8 or 10 feet long, joined by a 20 mm 3/4 inch locked and soldered seam.

2.2.15 Bituminous Plastic Cement

Provide in accordance with ASTM D4586/D4586M, Type I.

2.2.16 Roofing Felt

Provide in accordance with ASTM D226/D226M.

2.2.17 Asphalt Primer

Provide in accordance with ASTM D41/D41M.

2.2.18 Fasteners

Use the same metal as, or a metal compatible with the item fastened. Confirm compatibility of fasteners and items to be fastened to avoid galvanic corrosion due to dissimilar materials.

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Nailing

Confine nailing of flashing to one edge only. Space nails evenly not over 75 mm 3 inch on center and approximately 13 mm 1/2 inch from edge unless otherwise specified or indicated. Face nailing will not be permitted. Where sheet metal is applied to other than wood surfaces, include in shop drawings, the locations for sleepers and nailing strips required to secure the work.

3.1.2 Bolts, Rivets, and Screws

Install bolts, rivets, and screws where indicated or required. Provide compatible washers where required to protect surface of sheet metal and to provide a watertight connection. Provide mechanically formed joints in aluminum sheets 1.0 mm 0.040 inches or less in thickness.

3.1.7 Welding and Mechanical Fastening

Use welding for aluminum of thickness greater than 1.0 mm 0.040 inch. Aluminum 1.0 mm 0.040 inch or less in thickness must be butted and the space backed with formed flashing plate; or lock joined, mechanically fastened, and filled with sealant as recommended by the aluminum manufacturer.

3.1.7.1 Welding of Aluminum

Use welding of the inert gas, shield-arc type. For procedures, appearance and quality of welds, and the methods used in correcting welding work, conform to AWS D1.2/D1.2M.

3.1.9 Protection from Contact with Dissimilar Materials

3.1.9.1 Copper or Copper-bearing Alloys

Paint with heavy-bodied bituminous paint surfaces in contact with dissimilar metal, or separate the surfaces by means of moistureproof building felts.

3.1.9.2 Aluminum

Do not allow aluminum surfaces in direct contact with other metals except stainless steel, zinc, or zinc coating. Where aluminum contacts another metal, paint the dissimilar metal with a primer followed by two coats of aluminum paint. Where drainage from a dissimilar metal passes over aluminum, paint the dissimilar metal with a non-lead pigmented paint.

3.1.9.3 Metal Surfaces

Paint surfaces in contact with mortar, concrete, or other masonry materials with alkali-resistant coatings such as heavy-bodied bituminous paint.

3.1.9.4 Wood or Other Absorptive Materials

Paint surfaces that may become repeatedly wet and in contact with metal with two coats of aluminum paint or a coat of heavy-bodied bituminous paint.

3.1.10 Base Flashing

Extend up vertical surfaces of the flashing not less than 200 mm 8 inches and not less than 100 mm 4 inches under the roof covering. Where finish wall coverings form a counterflashing, extend the vertical leg of the flashing up behind the applied wall covering not less than 150 mm 6 inches. Overlap the flashing strips with the previously laid flashing not less than 75 mm 3 inches. Install and fit the flashings so as to be completely weathertight.

3.1.11 Counterflashing

Except where indicated or specified otherwise, insert counterflashing in reglets located from 230 to 250 mm 9 to 10 inches above roof decks, extend down vertical surfaces over upturned vertical leg of base flashings not less than 75 mm 3 inches. Fold the exposed edges of counterflashings 13 mm 1/2 inch. Where stepped counterflashings are required, they may be installed in short lengths a minimum 200 mm by 200 mm 8 inches by 8 inches or may be of the preformed single piece type. Provide end laps in counterflashings not less than 75 mm 3 inches and make it weathertight with plastic cement. Do not make lengths of metal counterflashings exceed 3000 mm 10 feet. Form flashings to the required shapes before installation. Factory form corners not less than 300 mm 12 inches from the angle. Secure the flashings in the reglets with lead edges and space not more than 450 mm 18 inches apart; on short runs, place wedges closer together. Fill caulked-type reglets or raked joints which receive counterflashing with caulking compound. Turn up the concealed edge of counterflashings built into masonry or concrete walls not less than 6 mm 1/4 inch and extend not less than 50 mm 2 inches into the walls. Install counterflashing to provide a spring action against base flashing.

3.1.12 Metal Reglets

Keep temporary cores in place during installation. Ensure factory fabricated caulked type or friction type, reglets have a minimum opening of 6 mm 1/4 inch and a minimum depth of 30 mm 1-1/4 inch, when installed.

3.1.12.1 Caulked Reglets

Wedge flashing in reglets with lead wedges every 450 mm 18 inches, caulked full and solid with an approved compound.

3.1.12.2 Friction Reglets

Install flashing snap lock receivers at 600 mm by 600 mm 24 inches on center maximum. When flashing has been inserted the full depth of the slot, caulk the slot, lock with wedges, and fill with sealant.

3.1.16 Flashing for Roof Drains

Provide a 750 mm 30 inches square sheet indicated. Taper insulation to drain from 600 mm 24 inches out. Set flashing on finished felts in a full bed of asphalt roof cement, ASTM D4586/D4586M. Heavily coat the drain flashing ring with asphalt roof cement. Clamp the roof membrane, flashing sheet, and stripping felt in the drain clamping ring. Secure clamps so that felts and drain flashing are free of wrinkles and folds. Retrofit roof drains must conform to ANSI/SPRI RD-1.

3.1.17 Scuppers

Extend the scupper liner through and project outside of, the wall it penetrates to form a bottom drip edge against the face of the wall. Fold outside edges under 13 mm 1/2 inch on all sides. Join the top and sides of the lining on the roof deck side to a closure flange by a locked and soldered joint. Join the bottom edge by a locked and soldered joint to the closure flange, where required, form with a ridge to act as a gravel stop around the scupper inlet. Provide surfaces to receive the scupper lining and coat with bituminous plastic cement.

3.2 PAINTING

Touch ups in the field may be applied only after metal substrates have been cleaned and pretreated in accordance with manufacturer's written instructions and products.

Field-paint sheet metal for separation of dissimilar materials.

3.2.1 Aluminum Surfaces

Clean with solvent and apply one coat of zinc-molybdate primer and one coat of aluminum paint.

3.4 REPAIRS TO FINISH

Scratches, abrasions, and minor surface defects of finish may be repaired in accordance with the manufacturer's printed instructions and as approved. Repair damaged surfaces caused by scratches, blemishes, and variations of color and surface texture. Replace items which cannot be repaired.

a. Observation of environmental conditions; number and skill level of sheet metal workers; condition of substrate.

b. Verification that specified material is provided and installed.

c. Inspection of sheet metalwork, for proper size(s) and thickness(es), fastening and joining, and proper installation.

A roofing technician responsible directly to the Contractor and experienced in construction of the specified type of roofing system and related work must perform quality control functions and be present on site during roofing installations.

-- End of Section --

SECTION 07 60 00

Page