SECTION 07 6200
SHEET METAL Flashing and trim
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LANL MASTER SPECIFICATION
This template must be edited for each project. In doing so, specifier must add job-specific requirements. Brackets are used in the text to indicate designer choices or locations where text must be supplied by the designer. Once the choice is made or text supplied, remove the brackets. The specifications must also be edited to delete specification requirements for processes, items, or designs that are not included in the project, add specification requirements not included herein as well as delete specifier’s notes such as these. Additional tailoring requirements are contained in ESM Chapter 1 Section Z10 Att. F, Specifications.
To seek a variance from requirements in the specifications that are applicable, contact the Engineering Standards Manual Architectural POC. Please contact POC with suggestions for improvement as well.
When assembling a specification package, include applicable specifications from all Divisions, especially Division 1, General requirements.
Specification developed for ML-4 projects. For ML-1, 2, and 3 applications, additional requirements and independent reviews should be added if increased confidence in procurement or execution is desired; see ESM Chapter 1 Section Z10 Specifications and Quality sections.
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PART 1 GEnERAl
1.1 Summary
A. Section includes:
1. Manufactured reglets [and counterflashing].
2. Formed roof drainage sheet metal fabrications.
3. Formed low-slope roof sheet metal fabrications.
4. Formed wall sheet metal fabrications.
5. EPDM flashings.
6. Miscellaneous sheet metal accessories.
B. Related Sections
1. [Section 03 3001, Reinforced Concrete.]
2. [Section 04 2220, Reinforced Unit Masonry.]
3. [Section 06 1000, Rough Carpentry, for wood, nailers, curbs and blocking.]
4. [Section 07 5213.13, Atactic-Polypropylene Modified-Bitumen Roofing, Cold- Applied.]
5. [Section 07 5217, SBS Modified-Bitumen Roofing, Cold-Applied.]
6. [Section 07 5217, Styrene-Butadiene-Styrene (SBS) Modified Bituminous Membrane Roofing, Cold Applied.]
7. [Section 07 4113, Metal Roof Panels, for custom-formed sheet metal flashing and trim integral with sheet metal roofing.]
8. [Section 07 7100, Roof Specialties, for set-on-type curbs, equipment supports, roof hatches, vents and other manufactured roof accessory units.]
9. [Section 07 9200, Joint Sealants.]
1.2 references
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A. American Architectural Manufactures Association (AAMA)
1. AAMA 611 – Voluntary Specification for Anodized Architectural Aluminum.
2. AAMA 620 – Voluntary Specification For High Performance Organic Coatings On Coil Coated Architectural Aluminum Substrates.
3. AAMA 621 - Voluntary Specifications For High Performance Organic Coatings On Coil Coated Architectural Hot Dipped Galvanized (HDG) And Zinc-aluminum Coated Steel Substrates
4. AAMA 2603 – Voluntary Specification, Performance Requirements and Test Procedures for Pigmented Organic Coatings on Aluminum Extrusions and Panels.
5. AAMA 2604 – Voluntary Specification, Performance Requirements and Test Procedures for High Performance Organic Coatings on Aluminum Extrusions and Panels.
6. AAMA 2605 – Voluntary Specification, Performance Requirements and Test Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and Panels.
B. ASTM International
1. ASTM A 153 - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
2. ASTM A 240 – Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications.
3. ASTM A 653 – Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-coated (Galvanized) by the Hot-Dip Process.
4. ASTM A 666 - Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar.
5. ASTM A 755 – Standard Specification for Steel Sheet, Metallic coated by the Hot-Dip Process and Pre-painted by the Coil-Coating Process for Exterior Exposed Building Products.
6. ASTM A 792 - Standard Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process.
7. ASTM B 32 – Standard Specification for Solder Metal.
8. ASTM B 209 – Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.
9. ASTM C 920 – Standard Specification for Elastomeric Joint Sealants.
10. ASTM C 1311 - Standard Specification for Solvent Release Sealants.
11. ASTM D 226 – Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.
12. ASTM D 1187 - Standard Specification for Asphalt-Base Emulsions for Use as Protective Coatings for Metal.
13. ASTM D 1970 - Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.
14. ASTM D 2244 – Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates.
15. ASTM D 4214 - Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films.
16. ASTM D 4397 – Standard Specification for Polyethylene Sheeting for Construction, Industrial, and Agricultural Applications.
17. ASTM F 2329 - Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
C. Copper Development Association (CDA)
1. Copper in Architecture – Design Handbook.
D. Factory Mutual Global (FMG)
1. Loss Prevention Data Sheet 1-49 – Perimeter Flashing.
E. Sheet Metal and Air Conditioning Contractors National Association (SMACNA)
1. Architectural Sheet Metal Manual.
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Edit submittals to include only those absolutely necessary to assure requirements and features that are important for the specific project will be met.
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1.3 action SUBMITTALS
A. [Product Data: Submit manufacturer’s material and finish data, installation instructions, and general recommendations for each specified flashing material and fabricated product.]
B. [Shop Drawings: Show installation layouts of sheet metal flashing and trim, including plans, elevations, expansion-joint locations, and keyed details. Distinguish between shop- and field-assembled work.
1. Include details for forming, joining, supporting, and securing sheet metal flashing and trim, including pattern of seams, termination points, fixed points, expansion joints, expansion-joint covers, edge conditions, special conditions, and connections to adjoining work.
2. Samples for Initial Selection Purposes: Submit manufacturer’s color charts and texture variations for specified sheet materials to be exposed as finished surfaces.]
1.4 INFORMATIONAL SUBMITTALS
A. [Certificates of Qualification
1. Certificate of Fabricator qualifications.
2. Certificate of Installer qualifications.]
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Include only sustainable design submittals that are appropriate for the project’s sustainable design goals, if any.
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1.5 sustainable design submittals
A. [Manufacturer’s Certificate: Certify products meet or exceed specified sustainable design requirements.]
B. [Materials Resources Certificates:
1. Certify recycled material content for recycled content products.]
1.6 close-out submittals
A. [Maintenance Date: For sheet metal flashing, trim and accessories to include in maintenance manuals.]
B. [Warranty: Sample of special warranty.]
1.7 quality assurance
A. Qualifications
1. Fabricator: company specializing in sheet metal work with minimum 6 years documented experience.
2. Installer: Engage an experienced installer who has completed flashing, sheet metal, and trim work similar in material design, and extent to that indicated for project that have resulted in construction with a record of successful in-service performance.
1.8 delivery, storage, and handling
A. Do not store sheet metal flashing and trim materials in contact with other materials that might cause staining, denting, or other surface damage. Store sheet metal flashing and trim materials away from uncured concrete and masonry.
B. Protect strippable protective covering on sheet metal flashing and trim from exposure to sunlight and high humidity, except to the extent necessary for the period of sheet metal flashing and trim installation.
1.9 Warranty
A. Special Warranty on Finishes: Manufacturer’s standard form in which 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.
1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:
a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.
b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.
c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.
2. Finish Warranty Period: [20] [10] <Insert number> years from date of Substantial Completion.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Products made by the following manufacturers will be among those considered acceptable; however, the Construction Subcontractor is responsible for providing only products compatible with adjacent materials in the assembly.
B. Flashing and Sheet Metal
1. ATLAS Aluminum Corporation.
2. Fry Reglet Corporation.
3. Keystone Flashing Company.
4. MM Systems Corporation.
5. Petersen Aluminum Corporation.
6. Vincent Metals.
C. Gutters and Down Spouts
1. Berger Building Products Corp.
2. Klauer Manufacturing Co.
3. Obdyke, Inc.
4. [ ______] Model [ ______].
2.2 description
A. Sustainability Characteristics.
1. Steel
a. Post consumer content: 16 percent (Basic Oxygen Furnace (BOF)), 67 percent (Electric Arc Furnace (EAF)).
b. Total recovered materials: 25-30 percent (BOF), 100 percent (EAF).
2. Aluminum
a. Post consumer content: 25-95 percent.
b. Total recovered materials: 20-95 percent.
3. Fiber for Fiber Composite
a. Post consumer content: 50-100 percent.
b. Total recovered materials: 50-100 percent.
4. Rubber
a. Post consumer content: 12-100 percent.
b. Total recovered materials: 100 percent.
5. Plastic or Plastic / Rubber Composite
a. Post-consumer content: 100 percent.
b. Total recovered materials content: 100 percent.
2.3 performance / design criteria
A. Quality Standard: Fabricate and install sheet metal work in accordance with SMACNA “Architectural Sheet Metal Manual,” unless specifically indicated otherwise.
B. Wind Resistance: Fabricate and install flashings at edges of roof in accordance with FMG Loss Prevention Data Sheet 1-49 for specified wind zone. Ensure that substrate construction is also in compliance.
C. Thermal Movements: Provide sheet metal flashing and trim that allow for thermal movements resulting from the following maximum change (range) in ambient and surface temperatures, by preventing buckling, opening of joints, hole elongation, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Provide clips that resist rotation and avoid shear stress as a result of sheet metal and trim thermal movements. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.
1. Temperature Change Range: 120ºF (67º C), ambient; 180ºF (100º C) material surfaces.
2. Water Infiltration: Provide sheet metal flashing and trim that do not allow water infiltration to building interior.
D. Gutter and Downspout Components: Conform to applicable code for size and method of rain water discharge.
2.4 MATERIALS
A. Sheet Metals
1. General: Protect mechanical and other finishes on exposed surfaces from damage by applying a strippable, temporary protective film before shipping.
2. Aluminum Sheet: ASTM B 209, alloy as standard with manufacturer for finish required, with temper as required to suit forming operations and performance required.
a. As-Milled Finish: One-side bright mill finish.
b. Alclad Finish: Metallurgically bonded surfacing to both sides, forming a composite aluminum sheet with reflective luster.
c. Factory Prime coating: Where painting after installation is indicated, pretreat with white or light-colored, factory-applied, baked-on epoxy primer coat; minimum dry film thickness of 0.2 mil (0.005 mm).
d. Clear Anodic Finish, Coil Coated: AAMA 611, AA-M12C22A41, ClassI, 0.018 mm or thicker.
e. Color Anodic Finish, Coil Coated: AAMA 611, AA-M12C22A42/A44, Class I, 0.018 mm or thicker.
1) Color: [Champagne] [Light bronze] [Medium bronze] [Dark bronze] [Black] <Insert color>.
f. Exposed Coil-Coated Finishes:
1) Two-coat Fluoropolymer: AAMA 620. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat.
2) Three-Coat Fluoropolymer: AAMA 620. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in both color coat and clear topcoat.
3) Siliconized Polyester: Epoxy primer and silicone-modified, polyester-enamel topcoat.
g. Color: As selected from manufacturer’s full range. <Insert color>.
3. Stainless-Steel Sheet: ASTM A 240 or ASTM A 666, Type 304, dead soft, fully annealed; [2D (dull, cold rolled)] [2B (bright, cold rolled)] [3 coarse, polished directional satin)] [4 (polished directional satin)] finish
4. Metallic-Coated Steel Sheet: Restricted flatness steel sheet, metallic coated by the hot-dip process and pre-painted by the coil-coating process to comply with ASTM A 755.
a. Zinc-coated (Galvanized) Steel Sheet: ASTM A 653, G90 (Z275) coating designation; structural quality
b. Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792, Class AZ50 coating designation, Grade 40 (Class AZM150 coating designation, Grade 275); structural quality.
c. Surface: [Mill phosphatized for field painting] [Manufacturer’s standard clear acrylic coating on both sides].
d. Exposed Coil-Coated Finish:
1) Two-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat.
2) Three-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70 percent PVDF resin by weight in color coat.
3) Siliconized Polyester: Epoxy primer and silicone-modified, polyester-enamel topcoat.
e. Color: As selected from manufacturer’s full range. <Insert color>.
B. Underlayment Materials
1. Polyethylene Sheet: 6-mil thick polyethylene sheet complying with ASTMD 4397.
2. Felt: ASTM D 226, Type II (No. 30), asphalt-saturated organic felt, non-perforated.
3. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils (0.76 to 1.0 mm) thick, consisting of slip-resisting polyethylene-film top surface laminated to layer of butyl or SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer.
a. Thermal Stability: ASTM D 1970; stable after testing at 240 deg F (116 deg C).
b. Low-Temperature Flexibility: ASTM D 1970; passes after testing at minus 20 deg F (29 deg C).
4. Slip Sheet: Building paper, 3-lb/100 sq. ft. minimum, rosin sized.
C. Reglets
1. General: Units of type, material, and profile indicated, formed to provide secure interlocking of separate reglet and counterflashing pieces and compatible with flashing indicated.
a. Material: [Stainless steel, 0.019 inch (0.48 mm) thick] [Copper, 16 oz. /sq. ft. (0.55 mm thick)] [Aluminum, 0.024 inch (0.61 mm) thick] [Galvanized steel, 0.022 inch (0.56 mm) thick].