Attachment 13 Division 07 Specifications.pdf

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

SECTION 07 01 50.19

PREPARATION FOR RE-ROOFING

1. Complete roof removal for new roof system installation. Complete roof removal at B16, B26, B46, B53, and B61. B1 will be priced as CLIN 001

B. Existing Roofing System: Modified bitumen roofing components and metal panel roofing components include:

1. Roof insulation, modified bitumen roofing membrane and all associated components, metal panel roofing and all associated components 7/16” OSB cover board, and poly iso insulation

1.2 RELATED WORK

A. Section 06 10 00, ROUGH CARPENTRY: Replacement of wood blocking and nailers.

B. Section 07 52 00 SBS 2 PLY ROOFING: New Roofing System.

C. Section 07 60 00, FLASHING AND SHEET METAL: Sheet Metal

Counterflashing.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American National Standards Institute/Single-Ply Roofing Institute

(ANSI/SPRI):

FX-1 (R2016)............Standard Field Test Procedure for Determining the Withdrawal Resistance of Roofing Fasteners.

C. American Society for Nondestructive Testing (ASNT):

SNT-TC-1A (2019)........Personnel Qualification and Certification for

Nondestructive Testing.

D. ASTM International (ASTM):

C208-12(2017)e2.........Cellulosic Fiber Insulating Board.

C578-19.................Rigid, Cellular Polystyrene Thermal Insulation.

C728-17a................Perlite Thermal Insulation Board.

C1177/C1177M-17.........Glass Mat Gypsum Substrate for Use as

Sheathing.

C1153-10(2015)..........Location of Wet Insulation in Roofing Systems

Using Infrared Imaging.

C1278/C1278M-17.........Standard Specification Fiber-Reinforced Gypsum

Panel.

D4263-83(2018)..........Indicating Moisture in Concrete by the Plastic

Sheet Method.

E. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

DOC PS 1-19.............Structural Plywood.

DOC PS 2-18.............Performance Standard for Wood-Based

Structural-Use Panels.

1.4 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting minimum 30 days before beginning Work of this section.

1. Participants:

a. Contracting Officer.

b. FLETC - Charleston Project Manager.

c. Contractor.

d. Installer.

e. Other installers responsible for adjacent and intersecting work, including mechanical and electrical equipment installers.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Removal and installation schedule.

b. Removal and installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Removal and installation.

f. Temporary roofing including daily terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and installation details.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Description of temporary roof system and components.

3. List of patching materials.

4. Cover board fastening requirements.

5. Existing roofing warrantor's instructions.

D. Photographs: Document existing conditions potentially affected by roofing operations before work begins.

E. Field Inspection Reports:

1. Certify warrantor inspected completed roofing and existing warranty remains in effect.

F. Infrared Roof Moisture Survey Report.

1.6 QUALITY ASSURANCE

A. Installer Qualifications:

1. Same installer as Section 07 52 00, MODIFIED BITUMINOUS ASPHALT

ROOFING

2. Licensed to perform asbestos abatement in Project jurisdiction when removal of asbestos-containing material is required.

3. Approved by existing roofing system warrantor when work affects existing roofing system under warranty.

1.7 FIELD CONDITIONS

A. Building Occupancy: Perform work to minimize disruption to normal building operations.

1. Verify occupants are evacuated from affected building areas when working on structurally impaired roof decking above occupied areas.

2. Provide notice minimum 72 hours before beginning activities affecting normal building operations.

B. Existing Roofing Available Information:

1. The following are available for Contractor reference:

a. Limited construction drawings and project documents.

2. Examine available information before beginning work of this section.

C. Weather Limitations: Proceed with reroofing preparation only during dry weather conditions as specified for new roofing installation in Section

Section 07 52 00 MODIFIED BITUMINOUS ROOFING

1. Remove only as much roofing in one day as can be made watertight in same day.

D. Hazardous materials are not expected in existing roofing system.

1. As a precaution, all roofs associated with this RFP shall be tested for hazardous materials, results submitted to the Government

2. Do not disturb suspected hazardous materials. When discovered, notify Contracting Officer's Representative.

3. Hazardous materials discovered during execution of the work will be removed by Government as work of a separate contract.

1.8 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

B. Existing Warranties: Perform work to maintain existing roofing warranty in effect.

PART 2 - PRODUCTS

1.1 MATERIALS

A. Patching Materials: Match existing roofing system materials.

B. Plywood Sheathing: See Section 06 10 00, ROUGH CARPENTRY.

C. Metal Flashing: See Section 07 60 00, FLASHING AND SHEET METAL.

D. Temporary Protection Materials:

1. Expanded Polystyrene (EPS) Insulation: ASTM C578-19.

2. Plywood: NIST DOC PS 1-19, Grade CD Exposure 1-18.

3. Oriented Strand Board (OSB): NIST DOC PS 2-18, Exposure 1.

E. Temporary Roofing System Materials: Contractor's option.

F. Recover Board: One of the following:

1. Insulation: Submit Insulation board to be utilized

2. Glass Mat Gypsum Board: ASTM C1177/C1177M-17, water-resistant; 13 mm

(1/2 inch) thick.

3. Fiber Reinforced Gypsum Board: ASTM C1278/C1278M-17, water-resistant; 13 mm (1/2 inch) thick.

G. Fasteners: Type and size required by roof membrane manufacturer to resist wind uplift.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Infrared Roof Moisture Survey: Ground-based, walk-over type performed according to ASTM C1153-10(2015).

1. Record the entire survey on DVD and provide one copy to Contracting

Officer's Representative with report.

2. Include in report thermograms of suspect areas and corresponding daytime photos of same locations.

3. Conduct inspection by NDT test technician certified to at least

Level 2 in Thermal/Infrared test method according to ASNT SNT-TC-1A.

4. Mark out roof areas determined to be wet to indicate minimum areas to be removed.

3.2 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing roofing system indicated to remain.

1. Cover roof membrane with temporary protection materials without impeding drainage.

2. Limit traffic and material storage to protected areas.

3. Maintain temporary protection until replacement roofing is completed.

C. Protect existing construction and completed work from damage.

D. Protect landscaping from damage.

E. Maintain access to existing walkways and adjacent occupied facilities.

F. Coordinate use of rooftop fresh air intakes with Contracting Officer's

Representative to minimize effect on indoor air quality.

G. Ensure temporary protection materials are available for immediate use in case of unexpected rain.

H. Ensure roof drainage remains functional.

1. Keep drainage systems clear of debris.

2. Prevent water from entering building and existing roofing system.

I. Coordinate rooftop utilities remaining active during roofing work with

Contacting Officer's Representative.

3.3 RE-ROOFING PREPARATION - GENERAL

A. Notify Contacting Officer's Representative of planned operations, weekly.

1. Identify location and extent of roofing removal.

2. Request authorization to proceed.

3.4 OVERBURDEN REMOVAL

A. Remove any overburden material from roof.

B. Remove insulation from protected roofing membrane.

3.5 COMPLETE ROOFING SYSTEM REMOVAL

A. Remove existing roofing system completely, exposing structural roof deck.

1. Remove cover board, roof insulation, vapor retarder, down to existing concrete deck

2. Remove or cut-off roofing system fasteners.

3.6 PARTIAL ROOFING SYSTEM REMOVAL

A. Remove existing roofing completely, exposing structural roof deck at locations and to extent indicated on drawings.

1. Remove cover board, roof insulation, vapor retarder, down to existing concrete deck

2. Remove or cut-off roofing system fasteners.

3.7 DECK PREPARATION

A. Inspect structural roof deck after roofing system removal.

B. Concrete Roof Decks:

1. Visually confirm concrete roof deck is dry.

2. Perform moisture test according to ASTM D4263-83(2018) for each separate roof area.

a. Proceed with roofing work only when moisture is not observed.

C. Steel Roof Decks:

1. Visually inspect structural roof deck installation and fasteners.

a. Notify Contracting Officer's Representative of unsuitable conditions and inadequate fastenings potentially affecting roof system performance.

2. Secure roof deck with additional fastenings as determined by

Contracting Officer's Representative.

3. Replace roof deck as determined by Contracting Officer's

Representative.

D. Remove temporary roofing before installing new roofing.

E. Prepare temporary roofing to receive new roofing.

F. Remove existing roofing surface projections and irregularities. Produce smooth surface to receive recover boards.

1. Broom clean existing surface.

3.8 BASE FLASHING REMOVAL

A. Expose base flashings to permit removal.

1. Two-Piece Counterflashings: Remove cap flashing, prep for new install.

2. Single Piece Counterflashings: See details, carefully bend counterflashing and bend back at locations specify.

3. Metal Copings: Remove decorative cap, prep for new install.

B. Remove existing base flashings.

1. Clean substrates to receive new flashings.

C. Replace counterflashings damaged during removal.

1. Counterflashings: See Section 07 60 00 FLASHING AND SHEET METAL.

D. Remove existing parapet sheathing and inspect parapet framing.

1. Notify Contracting Officer's Representative of damaged framing.

E. Install new pressure-preservative treated wood as required.

3.9 COVER BOARD INSTALLATION

A. Install cover boards over new roof insulation with butted joints.

Stagger end joints in adjacent rows.

B. Fasten cover boards to resist wind-uplift.

1. Fastening Requirements: See Section 07 52 00, MODIFIED

BITUMINOUS ROOFING

2. Uplift Resistance: Base on pull out resistance determined by specified field testing.

3.10 FIELD QUALITY CONTROL

A. Field Tests: Performed by testing laboratory or manufacturer representative

1. Fastener Pull Out Tests: ANSI/SPRI FX-1(2016).

B. Existing Roofing System Warrantor Services:

1. Inspect reroofing preparation and roofing installation to verify compliance with existing warranty conditions.

2. Submit reports of field inspections, and supplemental instructions issued during inspections.

3.11 DISPOSAL

A. Collect waste materials in containers.

B. Remove waste materials from project site, regularly, to prevent accumulation.

C. Legally dispose of waste materials.

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07 22 00 ROOF AND DECK INSULATION

A. Section Includes: Vapor Retarder, roof insulation, and cover board on existing concrete deck substrate prepared to receive new roofing system.

1.2 RELATED REQUIREMENTS

A. Wood Cants, Blocking, and Edge Strips: Section 06 10 00, ROUGH

CARPENTRY.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Society of Heating, Refrigeration and Air Conditioning

(ASHRAE):

1. Standard 90.1-13 - Energy Standard for Buildings except Low-Rise

Residential Buildings.

C. ASTM International (ASTM):

1. C208-12 - Cellulosic Fiber Insulating Board.

2. C552-15 - Cellular Glass Thermal Insulation.

3. C726-05 - Mineral Fiber Roof Insulation Board.

4. C728-15 - Perlite Thermal Insulation Board.

5. C1177/C1177M-13 - Glass Mat Gypsum Substrate for Use as Sheathing.

6. C1278/C1278M-07a(2015) - Fiber-Reinforced Gypsum Panel.

7. C1289-15 - Faced Rigid Cellular Polyisocyanurate Thermal Insulation

Board.

8. C1396/C1396M-14a - Gypsum Board.

9. D41/D41M-11 - Asphalt Primer Used in Roofing, Dampproofing, and

Waterproofing.

10. D312-06 - Asphalt Used in Roofing.

11. D1970/D1970M-15 - Self-Adhering Polymer Modified Bituminous Sheet

Materials Used as Steep Roofing Underlayment for Ice Dam Protection.

12. D2178/D2178M-15 - Asphalt Glass Felt Used in Roofing and

Waterproofing.

13. D2822/D2822M-11 - Asphalt Roof Cement, Asbestos Containing.

14. D4586/D4586M-07(2012)e1 - Asphalt Roof Cement, Asbestos-Free.

15. E84-15a - Surface Burning Characteristics of Building Materials.

16. F1667-15 - Driven Fasteners: Nails, Spikes, and Staples.

D. National Roofing Contractors Association (NRCA):

1. Manual-15 - The NRCA Roofing Manual: Membrane Roof Systems.

E. U.S. Department of Agriculture (USDA):

1. USDA BioPreferred Program Catalog.

F. UL LLC (UL):

1. Listed - Online Certifications Directory.

G. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

1. DOC PS 1-09 - Structural Plywood.

2. DOC PS 2-04 - Performance Standard for Wood-Based Structural-Use

Panels.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 00, SUBMITTAL PROCEDURES

B. Submittal Drawings:

1. Show size, configuration, and installation details.

a. Nailers, cants, and terminations.

b. Layout of insulation showing slopes, tapers, penetrations, and edge conditions.

C. Manufacturer's Literature and Data:

1. Description of each product.

D. Samples:

1. Roof insulation, each type.

2. Fasteners, each type.

E. Qualifications: Substantiate qualifications meet specifications.

1. Installer.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: Same installer as Division 07 roofing section installer.

1.6 DELIVERY

A. Comply with recommendations of NRCA Manual.

B. Deliver products in manufacturer's original sealed packaging.

C. Mark packaging, legibly. Indicate manufacturer's name or brand, type, and manufacture date.

D. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Comply with recommendations of NRCA Manual.

B. Store products indoors in dry, weathertight facility.

C. Protect products from damage during handling and construction operations.

1.8 FIELD CONDITIONS

A. Environment:

1. Install products when existing and forecasted weather permit installation according to manufacturer's instructions.

1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

B. Manufacturer's Warranty: Warrant substrate board, vapor retarder, insulation, and cover board against material and manufacturing defects as part of Division 07 roofing system warranty.

PART 2 - PRODUCTS

2.1 SYSTEM PERFORMANCE

A. Insulation Thermal Performance:

1. Overall Average R-Value: RSI-57 (R-33), minimum.

2. Any Location R-Value: RSI-17 (R-10), minimum.

B. Fire and Wind Uplift Resistance: Provide roof insulation complying with requirements specified in Division 07 roofing section.

2.2 PRODUCTS - GENERAL

A. Provide each product from one manufacturer.

2.3 VAPOR RETARDER

A. Basis of Design: GAF SA Vapor Retarder or equal. Follow all manufacturer’s installation instructions.

2.4 ADHESIVES

B. Primer: ASTM D41/D41M.

C. Asphalt: ASTM D312, Type III or IV for vapor retarders and insulation.

D. Modified Asphaltic Insulation Adhesive: Insulation manufacturer's recommended modified asphaltic, asbestos-free, cold-applied adhesive formulated to adhere roof insulation to substrate or to another insulation layer.

E. Bead-Applied Urethane Insulation Adhesive: Insulation manufacturer's recommended bead-applied, low-rise, one- or multicomponent urethane adhesive formulated to adhere roof insulation to substrate or to another insulation layer.

F. Full-Spread Applied Urethane Insulation Adhesive: Insulation manufacturer's recommended spray-applied, low-rise, two-component urethane adhesive formulated to adhere roof insulation to substrate or to another insulation layer.

G. Roof Cement: Asbestos free, ASTM D2822/D2822M, Type I or Type II; or, ASTM D4586/D4586M, Type I or Type II.

2.5 ROOF AND DECK INSULATION

H. Roof and Deck Insulation, General: Preformed roof insulation boards approved by roofing manufacturer.

I. Polyisocyanurate Board Insulation: ASTM C1289, Type II, Class 1, Grade

2, faced with glass fiber reinforced cellulosic felt facers on both major surfaces of the core foam.

J. Tapered Roof Insulation System:

1. Fabricate of mineral fiberboard, polyisocyanurate, perlite board, or cellular glass. Use only one insulation material for tapered sections. Use only factory-tapered insulation.

2. Cut to provide high and low points with crickets and slopes as shown.

3. Minimum thickness of tapered sections; 38 mm (1-1/2 inch).

4. Minimum slope 1/48 (1/4 inch per 12 inches).

2.6 INSULATION ACCESSORIES

K. Glass (Felt): ASTM D2178/D2178M, Type VI, heavy duty ply sheet.

L. Cants and Tapered Edge Strips:

1. Wood Cant Strips: Refer to Section 06 10 00, ROUGH CARPENTRY.

2. Insulation Cant Strips: ASTM C208, Type II, Grade 1, cellulosic-fiber insulation board.

3. Tapered Edge Strips: 1/12 (1 inch per 12 inches), from 0 mm

(0 inches), 300 mm to 450 mm (12 inches to 18 inches) wide.

a. Cellulosic Fiberboard: ASTM C208.

b. Mineral Fiberboard: ASTM C726.

c. Perlite Board: ASTM C728.

M. Vapor Retarder:

1. Glass-Fiber Felts: ASTM D2178/D2178M, Type IV, asphalt impregnated.

2. Self-Adhering Sheet Vapor Retarder: ASTM D1970/D1970M, minimum

1.0 mm (40 mils) thick membrane of HDPE film fully coated with asphalt adhesive, or 0.76 to 1.0 mm (30 to 40 mils) thick membrane of butyl rubber based adhesive backed by a layer of high density cross-laminated polyethylene;

Cover Board:

3. Glass-Mat, Water-Resistant Gypsum Roof Board: ASTM C1177/C1177M, 13 mm (1/2 inch).

2.7 ACCESSORIES

N. Fasteners: Corrosion-resistant carbon steel fasteners and galvalume-coated steel or plastic round plates for fastening substrate board and insulation to roof deck.

O. Nails: ASTM F1667; type to suit application.

PART 3 - EXECUTION

A. Comply with requirements of Division 07 roofing section.

3.2 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

3.3 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative

(COR)consideration.

B. Comply with requirements of UL for insulated steel roof deck.

C. Attach substrate board and other products to meet requirements of

Division 07 roofing section.

3.4 VAPOR RETARDER INSTALLATION

A. Vapor Retarder Installation, General:

1. Install continuous vapor retarder on roof decks where indicated.

2. At vertical surfaces, turn up vapor retarder to top of insulation or base flashing.

3. Seal penetrations through vapor retarder with roof cement to prevent moisture entry from below.

B. Cast in Place Concrete Decks, Except Insulating Concrete:

1. Prime deck as specified.

C. Precast Concrete Unit Decks Without Concrete Topping:

1. Prime deck as specified.

3.5 INSULATION INSTALLATION

A. Insulation Installation, General:

1. Base Sheet: Where required by roofing system, install one lapped base sheet specified in Division 07 roofing section by mechanically fastening to roofing substrate before installation of insulation.

2. Cant Strips: Install preformed insulation cant strips at junctures of roofing system with vertical construction.

3. Use same insulation as existing for roof repair and alterations unless specified otherwise.

B. Insulation Thickness:

1. Thickness of roof insulation shown on drawings is nominal. Provide thickness required to comply with specified thermal performance.

2. Insulation on Metal Decks: Provide insulation in minimum thickness recommended by insulation manufacturer to span deck flutes. Support edges of insulation on metal deck ribs.

3. When actual insulation thickness differs from drawings, coordinate alignment and location of roof drains, flashing, gravel stops, fascias and similar items.

4. Where tapered insulation is used, maintain insulation thickness at high points and roof edges shown on drawings.

a. Low Point Thickness: Minimum 38 mm (1-1/2 inches).

5. Use minimum two layers of insulation when required thickness is

68 mm (2.7 inch) or greater.

C. Lay insulating units with close joints, in regular courses and with end joints staggered.

1. Stagger joints between layers minimum 150 mm (6 inches).

D. Lay units with long dimension perpendicular to the rolled

(longitudinal) direction of the roofing felt.

E. Seal cut edges at penetrations and at edges against blocking with bitumen or roof cement.

F. Cut to fit tightly against blocking or penetrations.

G. Cover all insulation installed on the same day; comply with temporary protection requirements of Division 07 roofing section.

H. Installation Method:

1. Adhered Insulation:

a. Prime substrate as required.

b. Set each layer of insulation firmly in solid mopping of hot asphalt.

c. Set each layer of insulation firmly in ribbons of bead-applied insulation adhesive.

d. Set each layer of insulation firmly in uniform application of full-spread insulation adhesive.

2. Mechanically Fastened Insulation:

a. Fasten insulation according to requirements in Division 07 roofing section.

b. Fasten insulation to resist uplift pressures specified in

Division 07 roofing section.

3. Mechanically Fastened and Adhered Insulation:

a. Fasten first layer of insulation according to "Mechanically

Fastened Insulation" requirements.

b. Fasten each subsequent layer of insulation according to "Adhered

Insulation" requirements.

3.6 COVER BOARD INSTALLATION

A. Install cover boards over insulation with long joints in continuous straight lines with staggered end joints.

B. Offset cover board joints from insulation joints 150 mm (6 inches), minimum.

C. Secure cover boards according to wind uplift requirements.

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- - INTENTIONALLY BLANK - -

SECTION 07 41 13

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

METAL ROOF PANELS

07/18

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.

ALUMINUM ASSOCIATION (AA)

AA ADM (2015) Aluminum Design Manual

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 341 (2016) Seismic Provisions for Structural

Steel Buildings

AMERICAN IRON AND STEEL INSTITUTE (AISI)

AISI S100 (2012) North American Specification for the Design of Cold-Formed Steel Structural

Members

AISI SG03-3 (2002; Suppl 2001-2004; R 2008)

Cold-Formed Steel Design Manual Set

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7 (2017) Minimum Design Loads for Buildings and Other Structures

AMERICAN WELDING SOCIETY (AWS)

AWS A5.1/A5.1M (2012) Specification for Carbon Steel

Electrodes for Shielded Metal Arc Welding

AWS D1.1/D1.1M (2015; Errata 1 2015; Errata 2 2016)

Structural Welding Code - Steel

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

ASTM INTERNATIONAL (ASTM)

ASTM A1008/A1008M (2016) Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength

Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable

ASTM A123/A123M (2017) Standard Specification for Zinc

(Hot-Dip Galvanized) Coatings on Iron and

Steel Products

ASTM A36/A36M (2014) Standard Specification for Carbon

Structural Steel

ASTM A424/A424M (2009a; R 2016) Standard Specification for

Steel Sheet for Porcelain Enameling

ASTM A463/A463M (2010; R 2015) Standard Specification for

Steel Sheet, Aluminum-Coated, by the

Hot-Dip Process

ASTM A653/A653M (2017) Standard Specification for Steel

Sheet, Zinc-Coated (Galvanized) or

Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A755/A755M (2016; E 2016) Standard Specification for

Steel Sheet, Metallic Coated by the

Hot-Dip Process and Prepainted by the

Coil-Coating Process for Exterior Exposed

Building Products

ASTM A792/A792M (2010) Standard Specification for Steel

Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

ASTM A924/A924M (2017a) Standard Specification for General

Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B117 (2016) Standard Practice for Operating

Salt Spray (Fog) Apparatus

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 C286 (1999; R 2017) Standard Terminology

Relating to Porcelain Enamel and

Ceramic-Metal Systems

ASTM C552 (2017) Standard Specification for Cellular

Glass Thermal Insulation

ASTM C553 (2013) Standard Specification for Mineral

Fiber Blanket Thermal Insulation for

Commercial and Industrial Applications

ASTM C792 (2004; R 2008) Effects of Heat Aging on

Weight Loss, Cracking, and Chalking of

Elastomeric Sealants

ASTM C920 (2018) Standard Specification for

Elastomeric Joint Sealants

ASTM D1056 (2014) Standard Specification for Flexible

Cellular Materials - Sponge or Expanded

Rubber

ASTM D1308 (2013) Effect of Household Chemicals on

Clear and Pigmented Organic Finishes

ASTM D1654 (2008; R 2016; E 2017) Standard Test

Method for Evaluation of Painted or Coated

Specimens Subjected to Corrosive

Environments

ASTM D1667 (2017) Standard Specification for Flexible

Cellular Materials - Poly (Vinyl Chloride)

Foam (Closed-Cell)

ASTM D1970/D1970M (2017) Standard Specification for

Self-Adhering Polymer Modified Bituminous

Sheet Materials Used as Steep Roofing

Underlayment for Ice Dam Protection

ASTM D2244 (2016) Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color

Coordinates

ASTM D2247 (2015) Testing Water Resistance of

Coatings in 100% Relative Humidity

ASTM D226/D226M (2017) Standard Specification for

Asphalt-Saturated Organic Felt Used in

Roofing and Waterproofing

ASTM D2794 (1993; R 2010) Resistance of Organic

Coatings to the Effects of Rapid

Deformation (Impact)

ASTM D3359 (2017) Standard Test Methods for Rating

Adhesion by Tape Test

ASTM D3363 (2005; E 2011; R 2011; E 2012) Film

Hardness by Pencil Test

ASTM D4214 (2007; R 2015) Standard Test Method for

Evaluating the Degree of Chalking of

Exterior Paint Films

ASTM D4587 (2011) Standard Practice for Fluorescent

UV-Condensation Exposures of Paint and

Related Coatings

ASTM D4637/D4637M (2015) EPDM Sheet Used in Single-Ply Roof

Membrane

ASTM D4869/D4869M (2016a) Standard Specification for

Asphalt-Saturated Organic Felt

Underlayment Used in Steep Slope Roofing

ASTM D522/D522M (2014) Mandrel Bend Test of Attached

Organic Coatings

ASTM D523 (2014) Standard Test Method for Specular

Gloss

ASTM D5894 (2016) Standard Practice for Cyclic Salt

Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry

Cabinet and a UV/Condensation Cabinet)

ASTM D610 (2008; R 2012) Evaluating Degree of

Rusting on Painted Steel Surfaces

ASTM D714 (2002; R 2017) Standard Test Method for

Evaluating Degree of Blistering of Paints

ASTM D822 (2013) Filtered Open-Flame Carbon-Arc

Exposures of Paint and Related Coatings

ASTM D968 (2017) Standard Test Methods for Abrasion

Resistance of Organic Coatings by Falling

Abrasive

ASTM E1592 (2005; R 2012) Structural Performance of

Sheet Metal Roof and Siding Systems by

Uniform Static Air Pressure Difference

ASTM E2140 (2001; R 2017) Standard Test Method for

Water Penetration of Metal Roof Panel

Systems by Static Water Pressure Head

ASTM E84 (2018) Standard Test Method for Surface

Burning Characteristics of Building

Materials

ASTM G152 (2013) Operating Open Flame Carbon Arc

Light Apparatus for Exposure of

Nonmetallic Materials

ASTM G153 (2013) Operating Enclosed Carbon Arc Light

Apparatus for Exposure of Nonmetallic

Materials

FM GLOBAL (FM)

FM 4471 (2010) Class I Panel Roofs

METAL BUILDING MANUFACTURERS ASSOCIATION (MBMA)

MBMA RSDM (2012) Metal Roofing Systems Design Manual

NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)

NRCA 0420 (2010) Architectural Metal Flashing, Condensation Control and Reroofing

NRCA RoofMan (2017) The NRCA Roofing Manual

PORCELAIN ENAMEL INSTITUTE (PEI)

PEI 1001 (1996) Specification for Architectural

Porcelain Enamel (ALS-100)

PEI CG-3 (2005) Color Guide for Architectural

Porcelain Enamel

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

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

UNDERWRITERS LABORATORIES (UL)

UL 580 (2006; Reprint Oct 2013) Tests for Uplift

Resistance of Roof Assemblies

UL Bld Mat Dir (updated continuously online) Building

Materials Directory

1.2 DESCRIPTION OF METAL ROOF SYSTEM

1.2.1 Performance Requirements

Steel panels and accessory components must conform to the following standards:

ASTM A1008/A1008M

ASTM A123/A123M

ASTM A36/A36M

1.2.1.1 Hydrostatic Head Resistance

No water penetration when tested according to ASTM E2140. Submit leakage test report upon completion of installation.

Design criteria for hydrostatic standing seam panels shall have the following minimal performance:

ASTM E 1680: Static pressure air infiltration (roof panels):

Pressure Leakage Rate

1.57 PSF 0.0012 cfm/sq.ft.

6.24 PSF 0.0001 cfm/sq.ft.

20.0 PSF 0.0011 cfm/sq.ft.

ASTM E 1646: Static pressure water infiltration (roof panels):

Pressure Result

5 Gal/Hr Per S.F. and Static No Leakage

Pressure Of 20.0 Psf for 15 minutes

Wind and wind driven rain resistance: No water penetration or panel movement when exposed to 110 mph wind velocities when tested in accordance with TAS 100.

The installed roof system assembly shall show that it can resist the calculated roof pressure in section 1.11.B in accordance with the test results of TAS 125.

Water penetration in low slope applications: No water penetration or panel movement when subject to 6-inch head of water for 6 hours when tested in accordance with the ASTM E 2140 and when subject to 6-inch head of water for 7 days when tested in accordance with the TAS 114 Appendix G

1.2.1.2 Wind Uplift Resistance

Provide metal roof panel system that conform to the requirements of

ASTM E1592 and UL 580. Uplift force due to wind action governs the design for panels. Submit wind uplift test report prior to commencing installation.

Roof system and attachments must resist the wind loads as determined by

ASCE 7, in pounds per square foot. Metal roof panels and component materials must also comply with the requirements in FM 4471 as part of a panel roofing system as listed in Factory Mutual Guide (FMG) "Approval

Guide" for class 1 or noncombustible construction, as applicable. Identify all materials with FMG markings.

Design Loads: Submit copy of manufacturer's minimum design load calculations according to ASCE 7-05, Method 2 for Components and Cladding, sealed by a registered professional engineer employed by the system manufacturer as a full-time staff engineer. In no case shall the design loads be taken to be less than those detailed in Design and Performance

Criteria article of this specification.

1.3 SUBMITTALS

NOTE: If 01 33 29 is incorporated in the specifications, select that option below. If not, select the option for 01 57 19. Include items noted at SD-01 and SD-11 as applicable, based on project scope.

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the [Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY

REPORTING][Environmental Records Binder, in conformance to Section 01 57 19

TEMPORARY ENVIRONMENTAL CONTROLS]. Submit the following in accordance with

Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Roof Panels ; S

Insulation ; S

Fiber Underlayment ; S

SD-02 Shop Drawings

Roofing Panels; G

Flashing and Accessories; G

Gutter/Downspout Assembly; G

SD-03 Product Data

Submit manufacturer's catalog data for the following items:

Roof Panels; G

Factory-Applied Color Finish; G

Accessories;

Fasteners; G

Pressure Sensitive Tape;

Underlayments; G

Gaskets and Sealing/Insulating Compounds;

Coil Stock;

Enamel Repair Paint; G

Galvanizing Repair Paint; G

SD-04 Samples

Factory-applied Color Finish, Samples, full width; G

Accessories; G

Fasteners; G

Gaskets and Sealant/Insulating Compounds; G

SD-05 Design Data

Wind Uplift Resistance; G

SD-06 Test Reports; G

Leakage Test Report; G

Wind Uplift Test Report; G

Fire Rating Test Report; G

Factory Finish and Color Performance Requirements; G

SD-07 Certificates

Coil Stock Compatibility; G

Self-Adhering Modified Bitumen Underlayment; G

Qualification of Manufacturer; G

Qualification of Applicator; G

SD-08 Manufacturer's Instructions

Insulation; G

Installation Manual; G

SD-09 Manufacturer's Field Reports

Manufacturer's Field Inspection Reports;

SD-11 Closeout Submittals

Roof Panels (Recycled Content); S

Insulation (Recycled Content); S

Fiber Underlayment (Recycled Content); S

Warranties;

Information Card; G

Date of Installation Wall-Mounted Placard;

1.4 QUALITY ASSURANCE

1.4.1 Qualification of Manufacturer

Submit documentation verifying metal roof panel manufacturer has been in the business of manufacturing metal roof panels for a period of not less than 5 years.

Manufacturer must also provide engineering services by an authorized engineer, currently licensed in the geographic area of the project, with a minimum of five (5) years’ experience as an engineer knowledgeable in roof wind design analysis, protocols and procedures for MBMA RSDM, ASCE 7, UL 580, and FM 4471. Engineer must provide certified engineering calculations for the project conforming to the stated references.

1.4.1.2 Single Source

Roofing panels, clips, closures, and other accessories must be standard products of the same manufacturer, and the most recent design of the manufacturer to operate as a complete system for the intended use.

1.4.2 Qualification of Applicator

Metal roof system applicator must be approved, authorized, or licensed in writing by the roof panel manufacturer and have a minimum of three years’ experience as an approved, authorized, or licensed applicator with that manufacturer, approved at a level capable of providing the specified warranty. Supply the names, locations and client contact information of 5 projects of similar size and scope constructed by applicator using the manufacturer's roofing products submitted for this project within the previous three years.

1.4.3 Field Verification

Prior to the preparation of drawings and fabrication, verify location of roof framing, roof openings and penetrations, and any other special conditions. Indicate all special conditions and measurements on final shop drawings.

1.4.4 Qualifications for Welding Work

Welding procedures must conform to AWS D1.1/D1.1Mfor steel or AWS D1.2/D1.2M for aluminum.

Operators are permitted to make only those types of weldments for which each is specifically qualified.

1.4.5 Pre-roofing Conference

After approval of submittals and before performing roofing system installation work, hold a pre-roofing conference to review the following:

a. Drawings, specifications, and submittals related to the roof work.

Submit, as a minimum; sample profiles of roofing panels, with factory-applied color finish samples, flashing and accessories, gutter/downspout assembly samples, typical fasteners and pressure sensitive tape, sample gaskets and sealant/insulating compounds. Also include data and 1/2 pint sample of enamel repair paint and technical data on coil stock and coil stock compatibility, and manufacturer's installation manual.

b. Roof system components installation;

c. Procedure for the roof manufacturer's technical representative's onsite inspection and acceptance of the roofing substrate, the name of the manufacturer's technical representatives, the frequency of the onsite visits, distribution of copies of the inspection reports from the manufacturer's technical representative;

d. Contractor's plan for coordination of the work of the various trades involved in providing the roofing system and other components secured to the roofing; and

e. Quality control plan for the roof system installation;

f. Safety requirements.

Coordinate pre-roofing conference scheduling with the Contracting Officer.

Attendance is mandatory for the Contractor, the Contracting Officer's designated personnel, personnel directly responsible for the installation of metal roof system, flashing and sheet metal work, mechanical and electrical work, other trades interfacing with the roof work, and representative of the metal roofing manufacturer. Before beginning roofing work, provide a copy of meeting notes and action items to all attending parties. Note action items requiring resolution prior to start of roof work.

1.5 DELIVERY, HANDLING, AND STORAGE

Deliver, store, and handle panel materials, bulk roofing products, accessories, and other manufactured items in a manner to prevent damage and deformation, as recommended by the manufacturer, and as specified.

1.5.1 Delivery

Package and deliver materials to the site in undamaged condition. Provide adequate packaging to protect materials during shipment. Do not uncrate materials until ready for use, except for inspection. Immediately upon arrival of materials at jobsite, inspect materials for damage, deformation, dampness, and staining. Remove affected materials from the site and immediately replace. Remove moisture from wet materials not otherwise affected, restack and protect from further moisture exposure.

1.5.2 Handling

Handle materials in a manner to avoid damage. Select and operate material handling equipment so as not to damage materials or applied roofing.

1.5.3 Storage

Stack materials stored on site on platforms or pallets, and cover with tarpaulins or other weathertight covering which prevents trapping of water or condensation under the covering. Store roof panels so that water which may have accumulated during transit or storage will drain off. Do not store panels in contact with materials that might cause staining. Secure coverings and stored items to protect from wind displacement.

1.6 PROJECT CONDITIONS

Weather Limitations: Proceed with installation only when existing and forecast weather conditions permit metal roof panel work to be performed according to manufacturer's written instructions and warranty requirements, and specified safety requirements.

1.7 FABRICATION

Fabricate and finish metal roof panels and accessories on a factory stationary industrial type rolling mill to the greatest extent possible, per manufacturer's standard procedures and processes, and as necessary to fulfill indicated performance requirements. Comply with indicated profiles, dimensional and structural requirements.

Provide panel profile, as indicated on drawings including major ribs and intermediate stiffening ribs for full length of panel. Fabricate panel side laps with factory installed captive gaskets or separator strips providing a weather tight seal and preventing metal-to metal contact, and minimizing noise from movements within the panel assembly.

1.7.1 Finishes

Finish quality and application processes must conform to the related standards specified within this section. Noticeable variations within the same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved samples and are assembled or installed to minimize any contrasting variations.

1.7.2 Accessories

Fabricate flashing and trim to comply with recommendations in SMACNA 1793 as applicable to the design, dimensions, metal, and other characteristics of the item indicated.

a. Form exposed sheet metal accessories which are free from excessive oil canning, buckling, and tool marks, and are true to line and levels indicated, with exposed edges folded back to form hems.

b. End Seams: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with epoxy seam sealer. Rivet joints for additional strength.

c. Sealed Joints: Form non-expansion, but movable joints in metal to accommodate elastomeric sealant to comply with SMACNA 1793.

d. Conceal fasteners and expansion provisions where possible. Color matching touch up paint from manufacturer is required on all scratches or cosmetic damage.

e. Fabricate cleats and attachments devices of size and metal thickness recommended by SMACNA or by metal roof panel manufacturer for application, but not less than the thickness of the metal being secured.

1.8 WARRANTIES

Provide metal roof system material and workmanship warranties meeting specified requirements. Provide revision or amendment to manufacturer's standard warranty as required to comply with the specified requirements.

1.8.1 Metal Roof Panel Manufacturer Warranty

Furnish the metal roof panel manufacturer's 30 year no dollar limit roof system materials and installation workmanship warranty, including flashing, components, trim, and accessories necessary for a watertight roof system construction. Make warranty directly to the Government, commencing at time of Government's acceptance of the roof work. The warranty must state that:

a. If within the warranty period, the metal roof system, as installed for its intended use in the normal climatic and environmental conditions of the facility, becomes non-watertight, shows evidence of moisture intrusion within the assembly, displaces, corrodes, perforates, separates at the seams, or shows evidence of excessive weathering due to defective materials or installation workmanship, the repair or replacement of the defective and damaged materials of the metal roof system and correction of defective workmanship is the responsibility of the metal roof panel manufacturer. All costs associated with the repair or replacement work are the responsibility of the metal roof panel manufacturer.

b. If the manufacturer or his approved applicator fail to perform the repairs within 72 hours of notification, emergency temporary repairs performed by others does not void the warranty.

1.8.2 Manufacturer's Finish Warranty

The Government shall receive one (1) warranty from manufacturer of roof panels covering all of the following criteria. Multiple warranties are not acceptable.

1. Manufacturer's 30-year watertight warranty, including coverage for all trim, flashings, and penetrations associated with the standing seam roof area.

2. 20-year coverage on finish including checking, crazing, peeling, chalking, fading and/or adhesion.

3. Warranty shall commence on date of substantial completion or final payment, whichever is agreed by contract.

4. One manufacturer shall provide a single warranty for standing seam roof areas, low slope roof areas, and transitions between the two material types.

1.8.3 Metal Roof System Installer Warranty

Provide the "Contractors Five 5 Year No Penal Sum Warranty for Non-

Structural Metal Roof System" attached at the end of this section. Provide a separate bond in an amount equal to the installed total material and installation roofing system cost in favor of the Government covering the installer's warranty responsibilities effective throughout the five 5 year warranty period.

1.8.4 Continuance of Warranty

Repair or replacement work that becomes necessary within the warranty period must be approved, as required, and accomplished in a manner so as to restore the integrity of the roof system assembly and validity of the metal roof system manufacturer warranty for the remainder of the manufacturer warranty period.

1.9 CONFORMANCE AND COMPATIBILITY

The entire metal roofing and flashing system must be in accordance with specified and indicated requirements, including wind resistance and seismic per AISC 341 requirements. Work not specifically addressed and any deviation from specified requirements must be in general accordance with recommendations of the MBMA RSDM, NRCA RoofMan, the metal panel manufacturer's published recommendations and details, and compatible with surrounding components and construction. Submit any deviation from specified or indicated requirements to the Contracting Officer for approval prior to installation.

1.10 SCHEDULE

Some metric measurements in this section are based on mathematical conversion of English unit measurements, and not on metric measurement commonly agreed to by the manufacturers or other parties. The English and metric units for the measurements shown are as follows:

PRODUCTS ENGLISH UNITS METRIC UNITS

a. Sheet Aluminum 0.040 inch 1.0 mm

b. Panels 12 inches 300 mm

- vertical legs 2 inches 50 mm

- stiffening ribs 4 inches 100 mm

c. Screws No. 14 0.242 mm

No. 12 0.216 mm

d. Bolts 1/4 inch 6 mm

e. Studs 3/16 inch 5 mm

f. Fasteners 1/2 inch 13 mm

One inch 25 mm

g. Rivets 1/16 inch 5 mm

1/8 inch 3 mm

PART 2 PRODUCTS

2.1 ROOF PANELS

option below. If not, select the option for 01 57 19. Include items noted at SD-01 and SD-11 as applicable, based on project scope.

2.1.1 Steel Sheet Panels

Roll-form steel sheet roof panels to the specified profile, with fy as indicated ksi and minimum 22 gauge and depth as indicated.

Material must be plumb and true, and within the tolerances listed:

a. Galvanized steel sheet conforming to ASTM A653/A653M and AISI SG03-3.

b. Aluminum-Zinc alloy coated steel sheet conforming to ASTM

A792/A792M and AISI SG03-3.

c. Individual panels to have continuous length sufficient to cover the entire length of any unbroken roof slope with no joints or seams and formed without warping, waviness, or ripples that are not a part of the panel profile and free from damage to the finish coating system.

d. Provide panels with thermal expansion and contraction consistent with the type of system specified, and the following profile:

(1) profile to be a 4.45cm 1-3/4 inch high standing seam, 30.48 cm 12 inch coverage with mechanical crimping or snap-together seams with concealed clips and fasteners.

(2) profile to be smooth, flat surface.

(3) profile to be custom, as shown on drawings.

Provide products with recycled content and provide documentation in accordance with Section [01 33 29 SUSTAINABILITY REPORTING][01 57 19 TEMPORARY

ENVIRONMENTAL CONTROLS] paragraph RECYCLED CONTENT. For more information see https://sftool.gov/greenprocurement/green-products/1/construction-materials/231/roofing-materials/0?addon=False and https://www.epa.gov/smm/comprehensive-procurement-guideline-cpg-program.

2.2 FACTORY FINISH AND COLOR PERFORMANCE REQUIREMENTS

All panels are to receive a factory applied finish consisting of a baked topcoat with a manufacturer's recommended prime coat conforming to the following:

a. Metal Preparation: All metal is to have the surfaces carefully prepared for painting on a continuous process coil coating line by alkali cleaning, hot water rinsing, application of chemical conversion coating, cold water rinsing, sealing with an acid rinse, and thorough drying.

b. Prime Coating: A base coat of epoxy paint, specifically formulated to interact with the top-coat, is to be applied to the prepared surfaces by roll coating to a dry film thickness of 0.20 plus 0.05 mils. The prime coat must be oven cured prior to application of the finish coat.

c. Exterior Finish Coating: Apply the exterior finish coating over the primer by roll coating to a dry film thickness of 0.80 plus 0.05 mils

(3.80 plus 0.05 mils for Vinyl Plastisol) for a total dry film thickness of 1.00 plus 0.10 mils (4.00 plus 0.10 mils for Vinyl

Plastisol). This exterior finish coat must be oven-cured.

d. Interior finish coating: Apply a wash coat on the reverse side over primer by roll coating to a dry film thickness of 0.30 plus 0.05 mils for a total dry fill thickness of 0.50 plus 0.10 mils. The wash coat must be oven cured.

e. Color: The exterior finish chosen from the manufacturer's standard color chart.

f. Physical Properties: Coating must conform to the industry and manufacturer's standard performance criteria as listed by the following certified test reports:

General: ASTM D5894 and ASTM D4587

Abrasion: ASTM D968

Adhesion: ASTM D3359

Chalking: ASTM D4214

Chemical Pollution: ASTM D1308

Color Change and Conformity: ASTM D2244

Creepage: ASTM D1654

Cyclic Corrosion Test: ASTM D5894

Flame Spread: ASTM E84

Flexibility: ASTM D522/D522M

Formability: ASTM D522/D522M

Gloss at 60 and 85 degrees: ASTM D523

Humidity: ASTM D2247 and ASTM D714

Oxidation: ASTM D610

Pencil Hardness: ASTM D3363

Reverse Impact: ASTM D2794

Salt Spray: ASTM B117

Weatherometer: ASTM G152, ASTM G153 and ASTM D822

2.2.1 Specular Gloss

Finished roof surfaces to have a specular gloss value of 30 plus or minus at an angle of 60 degrees for general areas, use 10 or less at an angle of 85 degrees if it is along airfield areas, when measured in accordance with ASTM D523.

2.3 MISCELLANEOUS METAL FRAMING

2.3.1 General

Provide cold formed metallic-coated steel sheet conforming to

ASTM A653/A653M, AISI S100, and as specified in 05 40 00 COLD-FORMED METAL

FRAMING unless otherwise indicated.

2.3.2 Fasteners and Miscellaneous Metal Framing

Provide compatible type, corrosion resistant, of sufficient size and length to penetrate the supporting element a minimum of one inch with other required properties to fasten miscellaneous metal framing members to substrates in accordance with the roof panel manufacturer's and ASCE 7 requirements.

Exposed

2.3.2.1 Rivets

Provide closed-end type rivets, corrosion resistant stainless steel where watertight connections are required.

2.3.2.2 Attachment Clips

Provide stainless steel, series 300 clips. Size, shape, thickness and capacity must meet the thickness and design load criteria specified.

2.3.3 Electrodes for Manual, Shielded Metal Arc Welding

Electrodes for manual, shielded metal arc welding must meet the requirements of AWS D1.1/D1.1M, and be covered, mild-steel electrodes conforming to AWS A5.1/A5.1M.

2.4 ACCESSORIES

Accessories must be compatible with the metal roof panels. Sheet metal flashing, trim, metal closure strips, caps, and similar metal accessories must be not less than the minimum thicknesses specified for roof panels.

Provide exposed metal accessories to match the panels furnished, except as otherwise indicated. Molded foam rib, ridge and other closure strips must be closed-cell or solid-cell synthetic rubber or neoprene premolded to match configuration of the panels and not absorb or retain water.

2.4.1 Pre-manufactured…