Roof Retrofit TUT ADBM Bid Spec's 06105 07610 and 07620.pdf

S P E C I F I C A T I O N S F O R

ROOF RETROFIT

INSTALL HURRICANE TIES ON ROOF TRUSSES AND REPLACE

STANDING SEAM METAL ROOF

TUT NDB/ATBM/

SECTION 06105 - MISCELLANEOUS CARPENTRY

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Rooftop equipment bases and support curbs.

2. Wood furring, grounds, nailers, and blocking.

3. Interior wood trim.

B. Related Sections: The following Sections contain requirements that relate to this Section:

1. Section 06402 "Interior Architectural Woodwork."

1.2 SUBMITTALS

A. Wood treatment data as follows, including chemical treatment manufacturer's instructions for handling, storing, installing, and finishing treated materials:

1. For each type of preservative-treated wood product, include certification by treating plant stating type of preservative solution and pressure process used, net amount of preservative retained, and compliance with applicable standards.

2. For waterborne-treated products, include statement that moisture content of treated materials was reduced to levels indicated before shipment to Project site.

3. For fire-retardant-treated wood products, include certification by treating plant that treated materials comply with specified standard and other requirements as well as data relative to bending strength, stiffness, and fastener-holding capacities of treated materials.

B. Material test reports from a qualified independent testing agency indicating and interpreting test results relative to compliance of fire-retardant-treated wood products with performance requirements indicated.

C. Warranty of chemical treatment manufacturer for each type of treatment.

1.3 DELIVERY, STORAGE, AND HANDLING

A. Keep materials under cover and dry. Protect from weather and contact with damp or wet surfaces.

Stack lumber, plywood, and other panels. Provide for air circulation within and around stacks and under temporary coverings.

1. For lumber and plywood pressure treated with waterborne chemicals, place spacers between each bundle to provide air circulation.

PART 2 - PRODUCTS

2.1 LUMBER, GENERAL

A. Lumber Standards: Comply with DOC PS 20, "American Softwood Lumber Standard," and with applicable grading rules of inspection agencies certified by American Lumber Standards Committee's (ALSC) Board of Review.

B. Inspection Agencies: Inspection agencies, and the abbreviations used to reference them, include the following:

1. NELMA - Northeastern Lumber Manufacturers Association.

2. NLGA - National Lumber Grades Authority (Canadian).

3. RIS - Redwood Inspection Service.

4. SPIB - Southern Pine Inspection Bureau.

5. WCLIB - West Coast Lumber Inspection Bureau.

6. WWPA - Western Wood Products Association.

C. Grade Stamps: Provide lumber with each piece factory marked with grade stamp of inspection agency evidencing compliance with grading rule requirements and identifying grading agency, grade, species, moisture content at time of surfacing, and mill.

1. For exposed lumber, furnish pieces with grade stamps applied to ends or back of each piece.

D. Where nominal sizes are indicated, provide actual sizes required by DOC PS 20 for moisture content specified. Where actual sizes are indicated, they are minimum dressed sizes for dry lumber.

1. Provide dressed lumber, S4S, unless otherwise indicated.

2. Provide dry lumber with 19 percent maximum moisture content at time of dressing for 2-inch nominal thickness or less, unless otherwise indicated.

2.2 WOOD-PRESERVATIVE-TREATED MATERIALS

A. General: Where lumber or plywood is indicated as preservative treated or is specified to be treated, comply with applicable requirements of AWPA C2 (lumber) and AWPA C9 (plywood). Mark each treated item with the Quality Mark Requirements of an inspection agency approved by ALSC's Board of Review.

1. Do not use chemicals containing chromium or arsenic.

2. For exposed items indicated to receive stained finish, use chemical formulations that do not bleed through, contain colorants, or otherwise adversely affect finishes.

B. Pressure treat aboveground items with waterborne preservatives to a minimum retention of 0.25 lb/cu.

ft. After treatment, kiln-dry lumber and plywood to a maximum moisture content of 19 and 15 percent, respectively. Treat indicated items and the following:

1. Wood cants, nailers, curbs, equipment support bases, blocking, stripping, and similar members in connection with roofing, flashing, vapor barriers, and waterproofing.

2. Wood sills, sleepers, blocking, furring, stripping, and similar concealed members in contact with masonry or concrete.

C. Pressure treat wood members in contact with ground with waterborne preservatives to a minimum retention of 0.40 lb/cu. ft.

2.3 FIRE-RETARDANT-TREATED MATERIALS

A. General: Where fire-retardant-treated wood is indicated, comply with applicable requirements of

AWPA C20 (lumber) and AWPA C27 (plywood). Identify fire-retardant-treated wood with appropriate classification marking of UL; U.S. Testing; Timber Products Inspection, Inc.; or another testing and inspecting agency acceptable to authorities having jurisdiction.

1. Treatment Types: Interior Type A for protected wood and Exterior for wood exposed to weather.

B. Inspect each piece of treated lumber or plywood after drying and discard damaged or defective pieces.

2.4 BOARDS

A. Exposed Boards: Where boards will be exposed in the finished work, provide the following:

1. Moisture Content: 19 percent maximum.

2. Species and Grade: Southern pine, C Finish per SPIB rules.

B. Concealed Boards: Where boards will be concealed by other work, provide lumber with 19 percent maximum moisture content and of following species and grade:

1. Species and Grade: Eastern softwoods, No. 3 Common per NELMA rules.

2.5 MISCELLANEOUS LUMBER

A. General: Provide lumber for support or attachment of other construction, including rooftop equipment curbs and support bases, cant strips, bucks, nailers, blocking, furring, grounds, stripping, and similar members.

B. Fabricate miscellaneous lumber from dimension lumber of sizes indicated and into shapes shown.

C. Moisture Content: 19 percent maximum for lumber items are not specified to receive wood preservative treatment.

D. Grade: For dimension lumber sizes, provide No. 3 or Standard grade lumber per ALSC's NGRs of any species. For board-size lumber, provide No. 3 Common grade per NELMA, NLGA, or WWPA;

No. 2 grade per SPIB; or Standard grade per NLGA, WCLIB or WWPA of any species.

2.6 FASTENERS

A. General: Provide fasteners of size and type indicated that comply with requirements specified in this Article for material and manufacture.

1. Where miscellaneous carpentry is exposed to weather, in ground contact, or in area of high relative humidity, provide fasteners with a hot-dip zinc coating per ASTM A 153 or of Type 304 stainless steel.

B. Nails, Wire, Brads, and Staples: FS FF-N-105.

C. Power-Driven Fasteners: CABO NER-272.

D. Bolts: Steel bolts complying with ASTM A 307, Grade A; with ASTM A 563 hex nuts and, where indicated, flat washers.

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Discard units of material with defects that impair quality of carpentry and that are too small to use with minimum number of joints or optimum joint arrangement.

B. Set carpentry to required levels and lines, with members plumb, true to line, cut, and fitted.

C. Fit carpentry to other construction; scribe and cope as required for accurate fit. Correlate location of furring, nailers, blocking, grounds, and similar supports to allow attachment of other construction.

D. Apply field treatment complying with AWPA M4 to cut surfaces of preservative-treated lumber and plywood.

E. Securely attach carpentry work as indicated and according to applicable codes and recognized standards.

F. Countersink nail heads on exposed carpentry work and fill holes with wood filler.

G. Use fasteners of appropriate type and length. Predrill members when necessary to avoid splitting wood.

3.2 WOOD GROUNDS, NAILERS, BLOCKING, AND SLEEPERS

A. Install where shown and where required for screeding or attaching other work. Cut and shape to required size. Coordinate locations with other work involved.

B. Attach to substrates to support applied loading. Recess bolts and nuts flush with surfaces, unless otherwise indicated.

3.3 INSTALLATION OF STRUCTURAL-USE PANELS

A. General: Comply with applicable recommendations contained in APA Form No. E30, "APA

Design/Construction Guide: Residential & Commercial," for types of structural-use panels and applications indicated.

1. Comply with "Code Plus" provisions of above-referenced guide.

END OF SECTION 06105

SECTION 07610 - SHEET METAL ROOFING

A. This Section includes the following:

1. Standing-seam metal roofing, pre-finished.

B. Related Sections include the following:

1. Division 5 Section "Steel Deck" for steel roof deck.

2. Division 6 Section "Rough Carpentry" for wood framing and decking.

3. Division 7 Section "Sheet Metal Flashing and Trim" for flashing not part of roofing and other sheet metal work.

1.2 SUBMITTALS

A. Product Data: For each product indicated. Include details of construction relative to materials, dimensions of individual components, profiles, and finishes.

B. Shop Drawings: Show details for forming, joining, and securing metal roofing, and for pattern of seams.

Show expansion-joint details and waterproof connections to adjoining work and at obstructions and penetrations.

C. Samples for Initial Selection: Manufacturer's color charts showing the full range of colors available for metal roofing with color-coated finishes.

D. Samples for Verification: 12-inch- (300-mm-) square specimens of metal roofing material with specified finishes applied. Where finishes involve normal color and texture variations, include Sample sets of 2 or more units showing the full range of variations expected.

E. Product Certificates: Signed by manufacturers of the following products certifying that the products furnished comply with requirements:

1. Sheet metal roofing.

2. Special finishes.

F. Qualification Data: For firms and persons specified in the "Quality Assurance" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names and addresses of architects and owners, and other information specified.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced installer who has completed sheet metal roofing similar in material, design, forming method, and extent to that indicated for this Project and with a record of successful in-service performance.

B. Industry Standard: Unless otherwise shown or specified, comply with the Sheet Metal and Air

Conditioning Contractors National Association's (SMACNA) "Architectural Sheet Metal Manual."

Conform to dimensions and profiles shown.

C. Wind-Uplift Resistance: Provide roof assemblies that meet requirements of UL 580 for Class 90 wind-uplift resistance.

1. Maintain current certification of UL follow-up program for field-rolled panels on field-forming equipment.

D. Mockups: Before installing sheet metal roofing, construct mockups for each form of construction and finish required to verify selections made under Sample submittals and to demonstrate aesthetic effects and qualities of materials and execution. Build mockups to comply with the following requirements, using exposed and concealed materials and forming methods indicated for completed Work.

1. Locate mockups in the location and of the size indicated or, if not indicated, as directed by Architect.

2. Notify Architect 7 days in advance of the dates and times when mockups will be constructed.

3. Demonstrate the proposed range of aesthetic effects and workmanship.

4. Obtain Architect's approval of mockups before starting metal roofing Work.

5. Maintain mockups during construction in an undisturbed condition as a standard for judging the completed Work.

a. When directed, remove mockups from Project site.

b. Approved mockups in an undisturbed condition at the time of Substantial Completion may become part of the completed Work.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver metal coils, panels, and other roofing materials so they will not be damaged or deformed. Package roofing materials for protection against transportation damage.

B. Handling: Exercise care in unloading, storing, and erecting roofing materials to prevent bending, warping, twisting, and surface damage.

C. Stack materials on platforms or pallets, covered with tarpaulins or other suitable weathertight and ventilated covering. Store metal roof coils and panels to ensure dryness. Do not store coils or panels in contact with other materials that might cause staining, denting, or other surface damage.

1.7 WARRANTY

A. General Warranty: Special warranties specified in this Article shall not deprive the Owner of other rights the Owner may have under other provisions of the Contract Documents and shall be in addition to, and run concurrent with, other warranties made by the Contractor under requirements of the Contract Documents.

B. Special Finish Warranty: Submit a written warranty executed by the manufacturer covering failure of the factory-applied exterior finish on metal roofing within the specified warranty period and agreeing to repair finish or replace sheet metal roofing that evidences finish deterioration. Deterioration of finish includes, but is not limited to, color fade, chalking, cracking, peeling, and loss of film integrity.

C. Warranty Period: 20 years from date of Substantial Completion.

D. Special Weathertight Warranty: Submit a written warranty executed by the manufacturer agreeing to repair or replace sheet metal roofing that fails to remain weathertight within the specified warranty period.

E. Warranty Period: 5 years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Architectural Roofing and Siding, Inc.

2. Modern Metal Systems, Inc.

3. Overly Manufacturing Co.

4. Smith Steelite, Inc.

5. Vincent Metals.

2.2 ROOFING SHEET METALS

A. Metallic-Coated Steel Sheet Prepainted with Coil Coating: Steel sheet metallic coated by the hot-dip process and prepainted by the coil-coating process to comply with ASTM A 755 (ASTM A 755M) and the following requirements:

1. Galvanized Steel Sheet: ASTM A 653, G90 (ASTM A 653M, Z275); structural quality.

2. Aluminum-Zinc-Alloy-Coated Steel Sheet: ASTM A 792, Class AZ-50 coating, Grade 40

(ASTM A 792M, Class AZ-150 coating, Grade 275); structural quality.

3. Aluminum-Coated Steel Sheets: ASTM A 463, T1-40 (ASTM A 463M, T1-120) coating.

4. Thickness: 0.0217 inch (0.55 mm), unless otherwise indicated.

5. Thickness: 0.0276 inch (0.7 mm), unless otherwise indicated.

6. Batten Caps: 0.0276 inch (0.7 mm) thick.

a. Aluminum-Coated Steel Sheets: ASTM A 463, T1-40 (ASTM A 463M, T1-120) coating.

7. Finish: Apply the following organic coating in a thickness of not less than 0.0336 inch (0.85 mm), unless otherwise indicated. Furnish appropriate air-drying spray finish in matching color for touchup.

a. Fluoropolymer 2-Coat Coating System: Manufacturer's standard 2-coat, thermocured system composed of specially formulated inhibitive primer and fluoropolymer color topcoat containing not less than 70 percent polyvinylidene fluoride resin by weight with a total minimum dry film thickness of 0.9 mil (0.023 mm) and 30 percent reflective gloss when tested according to ASTM D 523.

1) Durability: Provide coating field tested under normal range of weather conditions for minimum of 20 years without significant peel, blister, flake, chip, crack, or check in finish; without chalking in excess of a chalk rating of 8 according to ASTM D 4214;

and without fading in excess of 5 Hunter units.

b. Siliconized Polyester Coating: Factory-applied, baked-on coating consisting of epoxy primer and silicone-modified, polyester-enamel topcoat; with a dry film thickness of not less than 0.2 mil (0.005 mm) for primer and 0.8 mil (0.02 mm) for topcoat.

c. Acrylic-Enamel Coating: Factory-applied, baked-on enamel coating consisting of epoxy primer and acrylic-enamel topcoat with a dry film thickness of not less than 0.2 mil (0.005

mm) for primer and 0.8 mil (0.02 mm) for topcoat.

1) Color: As indicated by manufacturer's color designations.

2) Color: Match Architect's sample.

3) Color: As selected by Architect from manufacturer's full range of colors.

4) Factory Prime Coating: Where painting after installation is indicated, provide pretreatment and white or light-colored, factory-applied, baked-on epoxy primer coat;

with a minimum dry film thickness of 0.2 mil (0.005 mm).

B. Aluminum Sheets: ASTM B 209 (ASTM B 209M) for Alclad alloy 3003 or 3004 with temper as required to suit forming operations and finish indicated.

1. Surface: Smooth, flat, mill finish.

2. Surface: Manufacturer's standard stucco embossed finish.

3. Alternative alloys include 1100, Alclad 3003, 3004, 3105, 5005, and 5050, in A14, H14, H24, H32, or H34 temper.

4. Thickness: 0.032 inch (0.8 mm), unless otherwise indicated.

5. Thickness: 0.040 inch (1.0 mm), unless otherwise indicated.

6. Batten Caps: 0.051 inch (1.3 mm) thick, 6063 alloy aluminum, temper T-5.

7. High-Performance Organic Coating Finish: Comply with NAAMM's "Metal Finishes Manual for

Architectural and Metal Products" for recommendations relative to applying and designating finishes. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturer's written instructions.

a. Fluoropolymer 2-Coat Coating System: Manufacturer's standard 2-coat, thermocured system composed of specially formulated inhibitive primer and fluoropolymer color topcoat containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with

AAMA 1402.

b. Fluoropolymer 3-Coat Coating System: Manufacturer's standard 3-coat, thermocured system composed of specially formulated inhibitive primer, fluoropolymer color coat, and clear fluoropolymer topcoat, with both color coat and clear topcoat containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with AAMA 1402.

1) Color and Gloss: As indicated by manufacturer's color and gloss designations.

2) Color and Gloss: Match Architect's sample.

3) Color and Gloss: As selected by Architect from manufacturer's full range of choices for color and gloss.

c. Siliconized Polyester Coating: Factory-applied, baked-on coating consisting of epoxy primer and silicone-modified, polyester-enamel topcoat; with a dry film thickness of not less than 0.2 mil (0.005 mm) for primer and 0.8 mil (0.02 mm) for topcoat.

1) Color and Gloss: As indicated by manufacturer's color and gloss designations.

2) Color and Gloss: Match Architect's sample.

3) Color and Gloss: As selected by Architect from manufacturer's full range of choices for color and gloss.

d. Acrylic-Enamel Coating: Factory-applied, baked-on enamel coating consisting of epoxy primer and acrylic-enamel topcoat with a dry film thickness of not less than 0.2 mil (0.005

mm) for primer and 0.8 mil (0.02 mm) for topcoat.

1) Color and Gloss: As indicated by manufacturer's color and gloss designations.

2) Color and Gloss: Match Architect's sample.

3) Color and Gloss: As selected by Architect from manufacturer's full range of choices for color and gloss.

C. Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 temper, unless otherwise indicated.

1. Weight (Thickness): 16 oz./sq. ft. (0.55 mm), unless otherwise indicated.

2. Weight (Thickness): 20 oz./sq. ft. (0.7 mm), unless otherwise indicated.

3. Batten Caps: 20-oz./sq. ft. (0.7-mm-thick) copper, unless otherwise indicated.

D. Lead-Coated Copper Sheet: ASTM B 101, Type I, Class A, consisting of cold-rolled copper sheet of weight (thickness) indicated below, coated both sides with lead weighing not less than 12 lb/100 sq. ft. (0.6 kg/sq. m) nor more than 15 lb/100 sq. ft. (0.7 kg/sq. m) of copper sheet (total weight of lead applied to both sides).

1. Weight (Thickness): Not less than 17.1 oz./sq. ft. (0.60 mm) with nominal weight (thickness) of bare copper sheet 16 oz./sq. ft. (0.55 mm), unless otherwise indicated.

2. Weight (Thickness): Not less than 20.9 oz./sq. ft. (0.75 mm) with nominal weight (thickness) of uncoated copper sheet 20 oz./sq. ft. (0.7 mm), unless otherwise indicated.

3. Batten Caps: 20.9-oz./sq. ft. (0.75-mm-thick) lead-coated copper, unless otherwise indicated.

E. Stainless-Steel Sheet: ASTM A 666, Type 304, dead soft, fully annealed.

1. Finish: 2D (dull).

2. Finish: 2B (bright).

3. Thickness: 0.015 inch (0.4 mm), unless otherwise indicated.

4. Thickness: 0.018 inch (0.5 mm), unless otherwise indicated.

5. Batten Caps: 0.018-inch- (0.5-mm-) thick stainless steel, unless otherwise indicated.

F. Terne-Coated Stainless-Steel Sheet: ASTM A 666, Type 304, dead-soft, fully annealed stainless-steel sheet, coated on both sides with terne alloy (80 percent lead, 20 percent tin) to produce a nominal total coating weight of 1.45 oz./sq. ft. (440 g/sq. m).

1. Thickness and Weight: 0.015 inch (0.4 mm) plus coating, weighing approximately 0.71 lb/sq. ft.

(3.5 kg/sq. m) including coating, unless otherwise indicated.

2. Thickness and Weight: 0.018 inch (0.5 mm) plus coating, weighing approximately 0.82 lb/sq. ft. (4 kg/sq. m) including coating, unless otherwise indicated.

3. Thickness and Weight: 0.024 inch (0.6 mm) plus coating, weighing approximately 1.07 lb/sq. ft.

(5.2 kg/sq. m) including coating, unless otherwise indicated.

4. In lieu of spot tests to determine coating weight, manufacturer may submit nondestructive radiographic test results and certification showing that terne-coating weight of sheets furnished for Project complies with requirements.

G. Terne-Coated Steel Sheet: ASTM A 308, LT110 coating designation, unless otherwise indicated.

1. Thickness: 0.012 inch (0.3 mm).

2. Thickness: 0.015 inch (0.4 mm).

3. Thickness: 0.018 inch (0.5 mm).

4. Coating Test: Confirm coating weight and composition by the triple-spot test according to

ASTM A 309.

a. In lieu of spot tests to determine coating weight, manufacturer may submit nondestructive radiographic test results and certification showing that terne-coating weight of sheets furnished for Project complies with requirements.

H. Lead Sheet: ASTM B 749, Type L51121, copper-bearing lead sheet, with a minimum thickness of 0.0625 inch (1.6 mm), but not less than 0.0937 inch (2.4 mm) thick for applications where burning (welding) is involved.

2.3 UNDERLAYMENT MATERIALS

A. Fabric Underlayment: Manufacturer's standard nonwoven polyester fabric marketed for use in cold-applied, single-ply roofing systems weighing 6.0 oz./sq. yd. (200 g/sq. m), white, nonswelling, rot and mildew resistant.

1. Product: Subject to compliance with requirements, provide "E6N Rufon Fabric" by Amoco Fabric and Fibers Co.

B. Polyethylene Underlayment: Minimum 6-mil (0.15-mm) polyethylene sheeting complying with

ASTM D 4397.

C. Self-Adhering, Polymer-Modified, Bituminous Sheet Underlayment: ASTM D 1970, minimum 40 mils (1

mm) thick. Provide primer when recommended by underlayment manufacturer.

1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

2. Products: Subject to compliance with requirements, provide one of the following:

a. WinterGuard; CertainTeed Corporation.

b. Bituthene Ice and Water Shield; Grace: W.R. Grace & Co.

c. Nordshield Ice and WaterGard; Nord Bitumi US, Inc.

d. F210; Northern Elastomeric, Inc.

e. Polyguard Deck Guard; Polyguard Products, Inc.

f. Polyken 640 Underlayment Membrane; Polyken Technologies.

g. QSC-707; Quaker Construction Products, Inc.

h. Moisture Guard; Tamko Asphalt Products, Inc.

i. Weather Watch; GAF Building Materials Corporation.

j. Jiffy Seal Ice and Water Guard; Protecto Wrap Co.

k. Ice Guard Membrane No. 108-AG; Royston Laboratories, Inc.

D. Building Paper: Minimum 5 lb/100 sq. ft. (2.4 kg/sq. m), rosin sized.

E. Felts: ASTM D 226, Type II (No. 30), asphalt-saturated organic felts.

F. Felts: ASTM D 226, Type I (No. 15), asphalt-saturated organic felts.

2.4 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings, separators, sealants, and accessory items as required for a complete roofing system and as recommended by sheet metal manufacturer and fabricator for metal roofing work, unless otherwise indicated.

B. Expansion-Joint Sealant: For hooked-type expansion joints, which must be free to move, provide nonsetting, nonhardening, nonmigrating, heavy-bodied polyisobutylene sealant.

C. Primer Paint: Rust-inhibitive primer recommended by sheet metal manufacturer for finish coat.

D. Terne Base Coating: Red iron-oxide/linseed oil paint, with iron oxide as 40 percent minimum of pigment and linseed oil as 50 percent minimum of vehicle.

E. Metal Accessories: Provide components matching sheet metal roofing in finish and material that are required for a complete roofing system, including the following:

1. Clips, flashings, and ridge closure strips.

2. Trim, copings, fasciae, gutters, and louvers.

F. Sealing Tape: Pressure-sensitive, 100 percent solids, polyisobutylene compound sealing tape with release paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape.

G. Elastomeric Joint Sealant: ASTM C 920, of base polymer, type, grade, class, and use classifications required to produce joints in roofing that will remain weathertight and as recommended by the roofing manufacturer for installation indicated.

H. Bituminous Coating: Cold-applied asphalt mastic, SSPC-Paint 12, compounded for 15-mil (0.4-mm) dry film thickness per coat, unless otherwise indicated. Provide inert-type noncorrosive compound free of asbestos fibers, sulfur components, and other deleterious impurities.

2.5 FABRICATION

A. General: Fabricate sheet metal roofing to comply with details shown, with metal roofing manufacturer's written instructions, and with recommendations of SMACNA's "Architectural Sheet Metal Manual" that apply to the design, dimensions, metal, and other characteristics of installation indicated.

B. Fabricate sheet metal to allow for expansion in running work sufficient to prevent leakage, damage, and deterioration of the Work. Form exposed sheet metal work to fit substrates without excessive oil canning, buckling, and tool marks, true to line and levels indicated, and with exposed edges folded back to form hems.

C. Expansion Provisions: Where lapped or bayonet-type expansion provisions in the Work cannot be used, or would not be sufficiently waterproof and weatherproof, form expansion joints of intermeshing hooked flanges, not less than 1 inch (25 mm) deep, filled with sealant (concealed within joints).

D. Sealant Joints: Where movable, nonexpansion-type joints are indicated or required to produce weathertight seams, form metal to provide for proper installation of elastomeric sealant, in compliance with SMACNA standards.

E. Separations: Separate metal from noncompatible metal or corrosive substrates by coating concealed surfaces at locations of contact with bituminous coating or other permanent separation as recommended by manufacturer or fabricator.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates and conditions, with Installer present, for compliance with requirements indicated for conditions affecting performance of sheet metal roofing. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Coordinate metal roofing with rain drainage work, flashing, trim, and construction of decks, parapets, walls, and other adjoining work to provide a leakproof, secure, and noncorrosive installation.

B. Promptly remove protective film, if any, from exposed surfaces of metal roofing. Strip with care to avoid damage to finish.

3.3 INSTALLATION, GENERAL

A. Install roofing to comply with sheet metal roofing manufacturer's written instructions, unless otherwise indicated.

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.

C. Install felt underlayment and building's paper slip sheet on substrate under metal roofing, unless otherwise recommended by sheet metal manufacturer. Use adhesive for temporary anchorage, where possible, to minimize use of mechanical fasteners under metal roofing. Apply from eave to ridge in shingle fashion and lap joints 2 inches (50 mm) minimum.

D. Install building paper as only underlayment under terne metal.

E. Coat back side of metal roofing with bituminous coating where it will contact wood, ferrous metal, or cementitious construction.

F. Paint back side of terne roofing with terne base coating, 1.0-mil (0.03-mm) dry film thickness, where slope of roofing is 3 inches per foot (1:4) or less.

G. Form and fabricate sheets, seams, strips, cleats, valleys, ridges, edge treatments, integral flashings, and other components of metal roofing to profiles, patterns, and drainage arrangements shown and as required for leakproof construction. Provide for thermal expansion and contraction of the Work. Seal joints as shown and as required for leakproof construction. Shop fabricate materials to greatest extent possible.

H. Sealant-Type Joints: Where sealant-filled joints are used, embed hooked flanges of joint members not less than 1 inch (25 mm) into sealant. Form joints to completely conceal sealant. When ambient temperature is moderate, between 40 and 70 deg F (4 and 21 deg C), at time of installation, 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 deg F (4 deg C). Comply with requirements of Division 7 Section "Joint Sealants" for handling and installing sealants.

I. 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. Fold back sheet metal to form a hem on concealed side of exposed edges, unless otherwise indicated.

J. 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.

K. Stainless-Steel Roofing: Tin edges of uncoated sheets to be soldered, for a width of 1-1/2 inches (38 mm), using solder recommended for stainless steel and acid flux. Promptly remove every trace of acid flux residue from metal after tinning. Comply with manufacturer's recommended methods for cleaning and neutralization. Clean exposed surfaces of stainless steel of every substance that is visible or that might cause corrosion of metal.

L. Tin uncoated copper surfaces at edges of sheets to be soldered, for a width of 1-1/2 inches (38 mm), using solder recommended for copper work. Where surfaces to be soldered are lead coated, do not tin edges, but wire brush lead coating before soldering.

M. Rivet joints in uncoated aluminum where necessary for strength. Clean exposed surfaces of every substance that is visible or that might cause corrosion of metal or deterioration of finish.

3.4 CLEANING

A. Clean exposed metal surfaces of substances that interfere with uniform oxidation and weathering.

3.5 PROTECTION

A. Provide final protection and maintain conditions, in a manner acceptable to manufacturer and Installer, that ensure metal roofing is without damage or deterioration at the time of Substantial Completion.

END OF SECTION 07610

SECTION 07620 - FLASHING AND SHEET METAL

A. This Section includes sheet metal flashing and trim in the following categories:

1. Exposed trim, and fasciae.

2. Copings.

3. Metal flashing.

4. Peel-and-stick through-wall flashings at precast concrete wall base.

5. Rain Drainage items.

B. Related Sections: The following Sections contain requirements that relate to this Section:

1. Section 04200 “Unit Masonry.”

2. Section 05810 "Expansion Joint Cover Assemblies."

3. Section 07720 "Roof Accessories."

4. Section 07901 "Joint Sealants."

5. Section 07527 “Sbs-Modified Bituminous Sheet Roofing.”

C. Definition, Rain Drainage: Items for draining rain water such as gutters, downspouts, conductors, scuppers, and splashblocks. Roof drains, specified in Division 15, are defined as roof drains and are not included in this definition of rain drainage.

1.2 REFERENCE STANDARDS

A. American Society for Testing and Materials

1. ASTM A 526: Specification for Steel Sheet, Zinc-Coated Galvanized) by the Hot-Dip Process, Commercial Quality.

2. ASTM A 527: Specification for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Lock-Forming Quality.

3. ASTM A 755: Specification for Steel Sheet, Metallic-Coated by the Hot-Dip Process and

Prepainted by the Coil-Coating Process for Exterior Exposed Building Products.

4. ASTM B 32: Specifications for Solder Metal.

5. ASTM B 749: Specification for Lead Alloy Strip, Sheet, and Plate Products.

6. ASTM D 4397: Specifications for Polyethylene Sheeting for Construction, Industrial, and

Agricultural Applications.

7. ASTM D 4586: Specifications for Asphalt Roof Cement, Asbestos-Free.

8. ASTM E 154: Methods of Testing Materials for Use as Vapor Barriers Under Concrete Slabs and as Ground Cover in Crawl Spaces.

B. Factory Mutual Research Corporation

1. FM Loss Prevention Data Sheet 1−49 : Perimeter Flashing

C. Sheet Metal and Air Conditioning Contractors National Association

1. Architectural Sheet Metal Manual. 5th ed.

D. Steel Structures Painting Council

1. SSPC−Paint 12 : Cold-Applied Asphaltic Mastic (Extra Thick Film)

1.3 PERFORMANCE REQUIREMENTS

A. General: Install sheet metal flashing and trim to withstand wind loads, structural movement, thermally induced movement, and exposure to weather without failing.

B. Fabricate and install flashings at roof edges to comply with recommendations of FM Loss Prevention

Data Sheet 1-49 for the following wind zone:

1. Wind Zone 1: Wind pressures of 30 psf.

1.4 SUBMITTALS