Attachment_9_-_Updated_Roofing_Specifactions__-_final_7_27_2021.pdf

Attachment 9 – Updated Roof Specifications 7.27.2021

Replace the Standing Seam Metal Roof at the Belmont-Paul Women’s Equality National Monument

0.0 BACKGROUND

THE BELMONT-PAUL HOUSE: The National Park Service (NPS) Belmont Paul Woman’s Equality

National Monument (BEPA) is operated by the National Capital Area (NCA) National Mall and Memorial Parks

(NAMA). The Belmont Paul Woman’s Equality National Monument was constructed for the Sewall Family c.

1800 and is attributed to Baltimore architect, Leonard Harbough.

In 1929, wealthy benefactor, Alva Vanderbilt Belmont, purchased the residence to serve as headquarters for the

National Woman’s Party (NWP), who promoted women’s equality and a woman’s right to vote. In 1974, the house was designated as a National Historic Landmark in recognition of the National Woman’s Party’s important work. The Belmont-Paul House was acquired by NPS from the National Woman’s Party in 2016.

At this time, President Barrack Obama designated the property a National Monument for its role commemorating the 19th Amendment and the women’s right to vote. Throughout its history, the BEPA house has undergone numerous rehabilitations over time, including a stable, now connected to the main house and serving as a library.

0.1 PURPOSE

The National Mall and Memorial Parks (NAMA) is embarking on an effort to rehabilitate the building to existing codes and standards. Currently the existing standing-seam metal roof is leaking and has failed prematurely and is need of replacement. NAMA requires the services of a single contractor who has experience with historical building restoration and is capable of replacing the existing standing seam metal roofing with a new standing seam metal roof.

It is the mission of the National Park Service to restore and preserve this historic building for the benefit of the visiting public and for future generations. It’s preservation for the education of the general public and for future generations, is thus an essential part of the National Park Service’s mission.

The information developed under this contract is the property of the U. S. Government and shall be kept in strict confidence.

0.2 LOCATION

A. LOCATION: The Belmont-Paul Women’s Equality National Monument (BEPA) is located at 144

Constitution Avenue, NE, Washington DC. The project building is located within the jurisdiction of

Capitol Hill. It sits on a property immediately south of the Hart Senate Building and a block from the

Supreme Court.

B. ADDRESS: 144 Constitution Avenue, NE in Washington, DC.

C. HISTORIC BUILDING: The Belmont Paul House has been designated as a National Historic

Landmark and as a National Monument for its role in commemorating the 19th Amendment and the women’s right to vote.

0.3 SCHEDULE

Workdays are Monday through Friday, excluding federal holidays and scheduled special events on site. All work shall be performed between the hours of 6:30 a.m. and 4:00 p.m.. Work shall be performed without interruption, unless weather conditions prohibit the performance of work, or unless directed otherwise by the

Contracting Officer’s Representative (COR).

0.4 BACKGROUND: PROJECT DESCRIPTION

A. GENERAL DESCRIPTION: This project involves submittals; inspections; staging; scaffolding;

site, building, and personnel protections; removal and disposal of existing sheet metal roof and existing underlayment; potential wood substrate repairs; installation of a new matching sheet metal roof with underlayments, high temperature ice water shield, and metal flashings; installation of new gutters and downspouts; removal of debris; cleanup, closeout, and warranty for the roof.

B. EXISTING ROOF: The existing roof is a painted stainless-steel standing seam metal roof that leaks. This roof was installed in 2008 but is failing as faulty seams now allow water to migrate to the interior. This has caused significant moisture damage to and staining of architectural finishes below and jeopardizing the valuable collections in the museum.

The existing standing seam metal roof area is approximately 4200sf with expected underlayment felts, and wood substrate. The paint layers on the sheet metal are not expected to contain Asbestos and Lead

Base Paint given the age of the roof. The condition of the existing wood substrate and rafters is unknown but suspected to require replacement in areas given the current roof leaks.

0.5 TASKS

Independently, and not as an agent of the Government, the Contractor shall provide the National Park

Service with all plans; submittals; correspondence, labor, supplies, equipment, materials, construction, deliveries, inspections, waste removal, warranties, cleanup, close-out, and travel necessary to perform the following:

1. Demolition and removal of the approximately 4200sf sheet metal roof and all related underlayment, sealants, caulking, flashings, gutters, downspouts, and their connectors

2. Inspection of wood substrate and rafters, and report of conditions to the COR. Possible repairs or replacement of roof sheathing, substrate, and rafters.

3. Installation of approximately 4200sf of new folded double lock standing seam copper roof per manufacturers specifications and recommendations. Included chimney base and counter flashing.

4. Installation of approximately 445LF of new 6-inch wide gutters with brackets and 12 lines

(approximately 390 LF) of 3-inch diameter downspouts with splash blocks. Test new gutters and downspouts with water flow for proper slopes to drain.

5. The new folded double lock standing seam sheet metal roof, associated flashings, gutters, and downspouts shall match exiting in color and finish.

6. Painting

0.6 SUBMITTALS

A. Section 01330 - Submittal Procedures: Submittal procedures in Attachment 1 – BEPA Phase 2 Final

Specification_120720.KB.

B. Shop Drawings: Indicate material profile, jointing pattern, jointing, fastening methods, flashings, terminations, and installation details. Show plan of panel layout and how if needed, expansion and contraction of material is provided using stationary cleats or expansion cleats. Show direction of roof expansion and contraction. Show all penetrations through panels. Show details at eave, hip, flashings and any special details. Show fastener, cleat and attachment layout, with load carrying capacity to meet these specifications and how the cleat fastener will hold into the substrate.

C. Installation: Submit a description of installation procedures which when approved by the COR will become the basis for accepting or rejecting the work.

0.7 DELIVERY, STORAGE AND HANDLING

A. Section 015000 – Temporary Services, Facilities and Controls: Product Delivery, Storage and Handling requirements (See Attachment 1).

B. Stack material to prevent twisting, bending, and abrasion, and to provide ventilation. Cover and slope metal sheets to ensure drainage. Materials stored on site must be covered and vented to allow condensation to escape

C. Prevent contact with materials causing discoloration or staining.

0.8 FIELD VERIFICATIONS

A. CONTRACTOR FIELD VERIFICATION: The contactor shall survey the conditions of the standing seam metal roof prior to commencement of work to verify the scope of work description, dimensions, and quantities. Before starting work, the contractor shall report his inspection to the COR and any discrepancies or differences which are found.

B. INSPECTION OF ROOF SUBSTRATE: The contactor shall inspect the existing wood substrate and rafters of the roof after the removal of the existing standing seam sheet metal roof, flashings, gutters, downspouts and underlayment’s in order to verify conditions before proceeding with work to install the new standing seam metal roof. Before resuming work, the contractor shall report his inspection to the COR and any discrepancies or differences which are found.

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes custom-fabricated, standing-seam copper roofing.

B. Related Sections:

1. Reference Attachment 1 – BEPA Phase 2 Final Specification_120720.KB for other details.

2. Attachment 10 – BEPA Drawing – Roof-Gutter-Downspout

1.3 COORDINATION

A. Coordinate copper roofing layout and seams with sizes and locations of roof curbs, equipment supports, equipment provided, and roof penetrations.

B. Coordinate copper roofing installation with rain drainage work, flashing, trim, and construction of roofing substrate, parapets, walls, and other adjoining work to provide leakproof, secure, and noncorrosive installation.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Review construction schedule. Verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

2. Review structural loading limitations of substrates during and after roofing installation.

3. Review flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that affect copper roofing.

4. Review requirements for insurance and certificates if applicable.

5. Review roof observation and repair procedures after copper roofing installation.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each manufactured product and accessory.

B. Shop Drawings: For standing seam copper roofing.

1. Include plans, elevations, sections, and attachment details.

2. Detail fabrication and installation layouts, expansion joint locations, fixed points, and keyed details. Distinguish between shop- and field-assembled work.

3. Include details for forming, including seams and dimensions.

4. Include details for joining and securing, including layout and spacing of fasteners, cleats, and other attachments. Include pattern of seams.

5. Include details of termination points and assemblies.

6. Include details of expansion joints, including showing direction of expansion and contraction from fixed points.

7. Include details of roof penetrations.

8. Include details of edge conditions, including eaves, ridges, valleys, rakes, crickets, and counter flashings.

9. Include details of special conditions.

10. Include details of connections to adjoining work.

11. Detail the following accessory items, at scale of not less than 1-1/2 inches per 12 inches:

a. Flashing and trim.

b. Gutters and downspouts as they relate to adjacent copper roofing.

c. Roof curbs.

d. Attachment of snow guards.

e. Attachment of fall protection.

C. ROOF MATERIAL SUBMITTALS: The contactor shall submit samples, shop drawings, and mockups of the following to the COR for approval:

1.Samples and Product Literature of underlayment’s and water shield.

2.Samples and Product Literature of sheet metal and flashings.

3.Shop Drawings or sample illustrations for roof and flashing installations.

4.Samples and Product Literature of gutter, downspout, hangers, and straps.

5.Samples and Product Literature for Snow Guard System installations.

6.Samples and Product Literature of Cleaners, lumber, and nails.

7.Samples of Miscellaneous - sealants, fasteners, rivets, cleats, splash block, etc.

D. Samples for Verification: For each type of exposed finish.

1. Copper roofing: 12 inches long by actual width of unit, including double lock standing seams and in required profile. Include fasteners, cleats, and other attachments.

2. Trim and Metal Closures: 12 inches long and in required profile. Include fasteners and other exposed accessories.

3. Other Accessories: 12-inch- long Samples for each type of other accessory.

1.6 INFORMATIONAL SUBMITTALS

A. Coordination Drawings: Roof plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved:

1. Copper roofing, seam locations, and attachments.

2. Equipment supports, pipe supports, and penetrations.

3. Lighting fixtures and cable runs.

4. Snow guards.

5. Items mounted on roof curbs.

6. Details for penetrations.

B. Qualification Data: For Installer and fabricator.

C. Product Test Reports: For each product, for tests performed by a qualified testing agency.

D. Sample Warranties: For special warranties.

1.7 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing sheet metals and accessories to include in maintenance manuals.

1.8 QUALITY ASSURANCE

A. Copper Roofing Fabricator Qualifications: Employs skilled workers who custom fabricate copper roofing similar to that required for this Project and whose products/projects have a minimum five

(5) year record of successful in-service performance.

1. Minimum five (5) projects completed.

B. Mockups: Build mockups to verify selections made under Sample submittals to demonstrate aesthetic effects and to set quality standards for fabrication and installation.

1. Build mockup of typical roof area, including, underlayment, attachments, and accessories.

a. Size: Approximately 12 feet long by 6 feet.

b. Include each type of exposed seam and seam termination.

2. Approval of mockups does not constitute approval of deviations from the Contract Documents contained in mockups unless Architect specifically approves such deviations in writing.

3. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Do not store copper roofing materials in contact with other materials that might cause staining, denting, or other surface damage. Store copper roofing materials away from uncured concrete and masonry.

1.10 WARRANTY

A. Special Warranty: Installer agrees to repair or replace components of copper roofing that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including, but not limited to, rupturing, cracking, or puncturing.

b. Wrinkling or buckling.

c. Loose parts.

d. Failure to remain weathertight, including uncontrolled water leakage.

e. Deterioration of metals and other materials beyond normal weathering.

f. Galvanic action between copper roofing and dissimilar materials.

2. Warranty Period: Five years from date of Substantial Completion.

a. Special leak free warranty from contractor: 5 years.

b. Manufacturers material warranty: 25 years.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. General Performance: Copper roofing system including, but not limited to, metal roof panels, cleats, anchors and fasteners, sheet metal flashing integral with copper roofing, trim, underlayment, and accessories, shall comply with requirements without failure due to defective manufacture, fabrication, or installation, or due to other defects in construction. Copper roofing shall remain weathertight.

B. Copper Roofing Standard: Comply with “Copper and Common Sense” 8th edition. Conform to dimensions and profiles shown unless more stringent requirements are indicated.

C. Recycled Content of Copper-Sheet / Coil Roofing: Provide copper sheet / coil roofing with recycled content such that postconsumer recycled content plus one-half of preconsumer recycled constitutes a percent by weight value required to achieve credits scheduled.

D. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes to prevent opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects.

1. 1/8-inch per 10’-0” per 100° in change in material temperature.

2.2 DOUBLE LOCK STANDING SEAM COPPER METAL ROOF & FLASHINGS

A. Copper Sheet: ASTM B 370, cold-rolled copper sheet, H00 temper.

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

a. Revere Copper Products, Inc.

2. Weight (Thickness): a t l e a s t 16 oz./sq. ft. for roofing and cleats.

3. Weight (Thickness): at least 16 oz./sq. ft. for continuous edge strips and valley sheets unless otherwise indicated.

4. Non-patinated Exposed Finish: Mill.

2.3 UNDERLAYMENT MATERIALS

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

1. Apply to entire roof surface.

B. Self-Adhering, High-Temperature Sheet: Minimum 30 mils thick, consisting of a slip-resistant polyethylene- or polypropylene-film top surface laminated to a layer of butyl- or SBS-modified asphalt adhesive, with release-paper backing; specifically designed to withstand high metal temperatures beneath metal roofing. Provide primer according to written recommendations of underlayment manufacturer.

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

a. Carlisle Residential, a division of Carlisle Construction Materials; WIP 300HT.

b. Grace Construction Products, a unit of W. R. Grace & Co.-Conn.; Ultra.

c. Henry Company; Blueskin PE200 HT.

2. Thermal Stability: ASTM D 1970; stable after testing at 240 deg F or higher.

3. Low-Temperature Flexibility: ASTM D 1970; passes after testing at minus 20 deg F or lower.

4. Apply to valleys and eaves.

a. Install the Water Shield along all edges and sides of the roof area. Install a double layer of membrane along the lower eaves.

b. Extend the Water Shield over the edges of the roof sheathing and extending a minimum 4” up the brick wall behind base, counter, and step flashings.

C. Slip Sheet: Rosin-sized building paper, 3 lb/100 sq. ft. minimum.

1. Extend the Rosin Paper over the edges of the roof sheathing and extending a minimum 4” up behind base, counter, and step flashings.

2.4 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, solder, protective coatings, sealants, and other miscellaneous items as required for complete roofing system and as recommended by primary sheet metal manufacturer unless otherwise indicated.

B. Fasteners for Copper Sheet: Copper, hardware bronze, or passivated Series 300 stainless steel

C. Solder: For Copper: ASTM B 32, composition 60% tin and 40% lead, and shall conform to the manufacturer’s recommendation.

D. Sealant Tape: Pressure-sensitive, 100 percent solids, polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic, non-staining tape 1/2 inch wide and 1/8 inch thick.

E. Elastomeric Sealant: ASTM C 920, elastomeric sealant; of type, grade, class, and use classifications required to seal joints in copper roofing and remain weathertight.

F. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;

polyisobutylene plasticized; heavy bodied for hooked-type expansion joints with limited movement.

G. Bituminous Coating: Cold-applied asphalt emulsion according to ASTM D 1187.

2.5 ACCESSORIES

A. Sheet Metal Accessories: Provide components required for complete copper roofing assembly including trim, copings, fasciae, corner units, clips, flashings, sealants, gaskets, fillers, metal closures, closure strips, and similar items. Match material and finish of copper roofing unless otherwise indicated.

1. Cleats: Intermittent and continuous attachment devices for mechanically seaming into joints and formed from the following materials and thicknesses unless otherwise indicated:

a. Copper Roofing: at least16-oz./sq. ft. copper sheet.

b. Expansion-Type Cleats: Cleats of same ounce weight as roofing panels that allows longitudinal movement of roof panels without stressing panel seams.

2. Closure Strips: Closed-cell, expanded, cellular, rubber or crosslinked, polyolefin foam or closed-cell laminated polyethylene; minimum 1-inch- thick, flexible-closure strips; cut or pre-molded to match copper roofing profile. Provide closure strips where necessary to ensure weathertight construction.

3. Flashing and Trim: Formed from at least 16 oz./sq. ft. copper. Any soldered flat locked and/or soldered low slope flashing at least 20 oz./sq. ft. copper.

B. Pipe Flashing: Pre-molded, EPDM pipe collar with flexible copper ring/stack bonded to copper base.

1. Basis of Design Product: Thunder Bird Copper Pipe Flashings or approved equal.

2.6 FABRICATION

A. General: Custom fabricate copper roofing to comply with details shown and recommendations in

“Copper and Common Sense” 8th Edition that apply to design, dimensions (panel width and seam height), geometry, metal thickness, and other characteristics of installation. Fabricate copper roofing and accessories in shop to greatest extent possible.

1. Standing-Seam Roofing:

a. Form standing-seam panels with finished seam height of 1 inch.

b. Form standing seam finished panel to width of 16-3/4-inch to 17-inch.

B. Form exposed sheet metal work to fit substrates with minimal oil canning; free of tool marks; true to line, levels, and slopes; and with exposed edges folded back to form hems where appropriate.

1. Lay out copper roofing so transverse seams, if required, are made in direction of flow with higher panels overlapping lower panels.

2. Offset transverse seams, if required, from each other 12 inches minimum, staggered.

3. 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 indicated on Drawings and as required for weathertight construction.

C. Expansion Provisions: Fabricate copper roofing to allow for expansion in running work sufficient to prevent leakage, damage, and deterioration of the Work.

1. Form expansion joints in accordance with “Copper and Common Sense” standards.

D. Sheet Metal Accessories: Custom fabricate flashings and trim to comply with recommendations in

“Copper and Common Sense” that apply to design, dimensions, metal, and other characteristics of item required. Obtain field measurements for accurate fit before shop fabrication.

1. Form exposed sheet metal accessories without excessive oil canning, buckling, and tool marks;

true to line, levels, and slopes; and with exposed edges folded back to form hems.

2. Conceal fasteners: Do not use exposed fasteners on faces of accessories exposed to view.

3. Fabricate cleats and attachment devices of sizes recommended by “Copper and Common

Sense” for application, but not less than thickness of metal being secured.

2.7 GUTTERS AND DOWNSPOUTS

A. GUTTER INSTALLATION: All gutter shall be installed in accordance with manufacturers recommendations. The new gutter system shall prove tight with fastened overlapped seams and thimble connection into the downspout.

B. GUTTER BRACKETT HANGERS: Install 12 inches on center. Adjust to allow proper gutter slope to drain into downspouts. Demonstrate capacity to sustain weight and provide slope for gutter positive water flow into downspout.

C. DOWNSPOUTS: Fabricate to the contour of vertical water down flow, connections, straps, and splash block location. Elbows and connections shall be mitered by soldering or welding with lap inside the lower. Provide and install strainer.

D. DOWNSPOUT HANGERS AND STRAPS: The downspouts shall be secured by pairs of straps 4 feet on center. Straps shall be fastened into wood with pairs adjacent to all elbows and connections.

E. SPLASH BLOCK: Install at least ten (10) into the ground on gravel bed at the downspout exits with positive slope to drain away from the building.

F. GUTTER TEST: The Contactor shall demonstrate that the gutters show positive slopes to drain into the downspout with a water test flow witnessed and approved by the COR.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances, substrate, and other conditions affecting performance of the Work.

1. Examine solid roof sheathing to verify that sheathing joints are supported by framing or blocking, that tops of fasteners are flush with surface, and that installation is within flatness tolerances required for finished roofing installation.

2. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and completely anchored, and that provision has been made for drainage, flashings, and penetrations through copper roofing.

3. Verify that air- or water-resistant barriers have been installed over sheathing or backing substrate to prevent air infiltration or water penetration.

B. Examine roughing-in for components and systems penetrating copper roofing to verify actual locations of penetrations relative to seam locations of copper roofing before installation.

C. Prepare written report, endorsed by Installer, listing conditions detrimental to performance of the

Work.

D. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Lay out panel arrangement before installation of double lock standing seam copper roofing.

3.3 UNDERLAYMENT INSTALLATION

A. Felt Underlayment: Install felt underlayment, wrinkle free, using adhesive to minimize use of mechanical fasteners under double lock standing seam copper roofing. Apply at locations indicated on Drawings in shingle fashion to shed water, with lapped joints of not less than 2 inches.

1. Apply felt underlayment over entire roof surface.

B. Self-Adhering Sheet Underlayment: Install self-adhering sheet underlayment, wrinkle free. Prime substrate if recommended by underlayment manufacturer. Comply with temperature restrictions of underlayment manufacturer for installation; use primer for installing underlayment at low temperatures. Apply in shingle fashion in direction of water flow to shed water, with end laps of not less than 6 inches staggered 24 inches between courses. Overlap side edges not less than 3-1/2 inches. Roll laps and edges with roller. Cover underlayment within 14 days.

1. Apply self-adhering sheet underlayment at valleys and 6’-0” up roof at all eaves.

C. Apply slip sheet, wrinkle free, over underlayment before installing double lock standing seam copper roofing and related flashing.

D. Install flashings to cover underlayment according to “Copper and Common Sense”.

3.4 INSTALLATION, GENERAL

A. General: Install double lock standing seam copper roofing to comply with details shown and recommendations in “Copper and Common Sense” that apply to installation characteristics required unless otherwise indicated on Drawings. Install fasteners, solder, protective coatings, separators, sealants, and other miscellaneous items as required for complete roofing system and as recommended by fabricator for copper roofing.

1. Install copper roofing true to line, levels, and slopes. Provide uniform, neat seams with minimum exposure of solder, welds, and sealant.

2. Anchor copper roofing and other components of the Work securely in place, with provisions for thermal and structural movement.

3. Field cutting of double lock standing seam copper roofing by torch is not permitted.

4. Provide copper closures at peaks, eaves and each side of ridge and hip caps.

5. Locate and space fastenings in uniform vertical and horizontal alignment.

6. Install ridge and hip caps as copper roofing work proceeds.

7. Lap copper flashing in direction of water flow to shed water.

B. Fasteners: Use fastener sizes that penetrate substrate to achieve maximum pull-out resistance according to fastener manufacturer testing data.

C. Metal Protection: Where dissimilar metals contact each other, or where metal contacts pressure-treated wood or other corrosive substrates, protect against galvanic action or corrosion by isolating contact surfaces with appropriate compatible materials. Apply in neat and professional manner to minimize spills, overuse and exposure.

D. Conceal fasteners in exposed work and locate to minimize possibility of leakage.

3.5 CUSTOM-FABRICATED COPPER ROOFING INSTALLATION

A. Fabricate and install work with lines and corners of exposed units true and accurate. Form exposed faces flat. Provide uniform, neat seams with minimum exposure of solder, welds, and sealant. Fold back sheet metal to form hem on concealed side of exposed edges where appropriate unless otherwise indicated.

1. Install cleats to hold sheet metal panels in position. Attach each cleat with at least two fasteners to prevent rotation.

2. Space cleats 12 inches o.c. Bend tabs over fastener head.

3. Provide expansion-type cleats for roof panels that exceed 30 feet in length.

B. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pre-tin edges of sheets with solder to a width of 1-1/2 inches.

1. Do not use open flame for soldering. Continuously heated copper irons acceptable.

2. Heat surfaces to receive solder, and flow solder into joint. Fill joint completely.

Completely remove flux and spatter from exposed surfaces.

3. Copper Soldering: Tin edges of uncoated sheets, using solder for copper.

C. Standing-Seam Roofing: Attach double lock standing seam copper roofing to substrate with cleats held down with two fasteners spaced at 12 inches o.c. Lock standing seams by folding over twice so cleat and panel edges are completely engaged.

1. Loose-lock panels at eave edges to continuous cleats and flanges at roof edge.

3.6 ACCESSORY INSTALLATION

A. General: Install accessories with positive anchorage to building and weathertight mounting and provide for thermal expansion. Coordinate installation with flashings and other components.

1. Install components required for complete copper roofing assembly including trim, copings, seam covers, flashings, sealants, gaskets, fillers, metal closures, closure strips, and similar items.

B. Flashing and Trim: Comply with performance requirements, manufacturer's written installation instructions, and “Copper and Common Sense”. Provide concealed fasteners where possible, and install units true to line, levels, and slopes. Install work with laps, joints, and seams that are permanently weathertight.

1. Install flashing and trim as required to be weathertight and to provide finished appearance.

Locations include, but are not limited to, eaves, rakes, corners, bases, framed openings, ridges, fasciae, and fillers.

2. Install exposed copper flashing and trim without excessive oil canning, true to line, levels and slopes. Install copper flashing and trim to fit substrates, and to result in weathertight performance.

3. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at maximum in accordance with “Copper and Common Sense” recommendations with no joints within 24 inches of corner or intersection.

a. Form expansion joints in accordance with “Copper and Common Sense” recommendations.

b. Use lapped expansion joints only where indicated on Drawings.

C. Pipe Flashing: Install flashing sleeve around pipe penetration and copper roofing. Fasten and seal to copper roofing as recommended by manufacturer.

3.7 ERECTION TOLERANCES

A. Installation Tolerance: Shim and align copper roofing within installed tolerances specified in

“Copper and Common Sense.”

3.8 CLEANING AND PROTECTION

A. Clean exposed metal surfaces:

1. General Cleaning: Upon completion, if necessary, and only if instructed by the Owner’s

Representative, copper shall be cleaned by washing with clean, fresh water only. Do not chemically or abrasively clean copper; do not use soaps, detergents, or other cleaning agents.

B. Clean and neutralize flux materials. Clean off excess solder.

C. Clean off excess sealants

D. Replace copper roofing components that have been damaged or have deteriorated beyond successful repair using minor repair procedures.

3.9 GUTTERS AND DOWNSPOUTS: All new gutters, bracket hangers, downspouts with straps, and related fasteners, rivets, and installation appurtenances shall be 20 ounce Freedom Gray Z-T Alloy over

Copper with Satin Finish and copper alloy as manufactured by Revere Copper Products Inc; Rome, NY, Tel.1-800-448-1776; or approved equal.

A. Gutters: Shall be 6” wide. Box Bead Gutter Style and shall match the profiles and shape of existing gutters; or approved equal.

B. Downspouts with Strainers: Shall be corrugated 3” wide and shall match the profiles and sizes of existing downspouts; or approved equal.

C. Gutter Brackett Hangers: Shall match the existing in style and shape; or approved equal.

D. Downspout Hangers and Straps: Straps shall be 2” wide flashing copper, at least 20-ounce, fastened into wood at each end by screws or nails, and to fold over the 3” diameter downspout.

E. All sheet metal Fasteners, Cleats, Nails, and Rivets should be copper alloy and conform to the sheet metal manufacturer’s recommendations. A300 Series stainless steel fasteners can also be substituted.

F. Suppliers for Gutter and Downspouts - Berger Building Products of Festerville, Pennsylvania, Tel.

215-355-1200; or Copper Craft, 404 E. Dallas Road, Grapevine, Texas, 76051, Tel. 1-800-486-2723;

or approved equal.

G. Gutters shall be painted to match existing.

3.10 SPLASH BLOCKS: Ten (10) rough surface stone pavers; at least 3” thick; each to match existing in size, color, texture, and appearance or existing.

3.11 SNOW GUARDS: Existing snow guards should be carefully removed, stored in a safe place, and reinstalled on the new roof system.

3.12 CLEANING AGENTS: Shall be products as recommended by the material manufacturers and as approved by the COR in the Contractor Work Plan.

3.13 PAINT: Paint shall be direct to metal (DTM) paint. Acceptable manufacturers include, but are not limited to Pruett Schaffer, Sherwin Williams, Benjamin Moore, or PPG. Provide finish and color samples to match existing roofing color and existing snow guards for COR approval. Provide paint primer for COR approval. Refer to project Specifications, Section 099123 (see Attachment 1) for quality assurance guidance and submittals.

3.14 SEALANTS AND FILLERS

The contractor shall apply sealants to fill holes, to cover rivet heads, to fill counter flashing overlap voids, and to cover openings to prevent water intrusion.

3.15 SNOW GUARDS

Reinstall existing snow guards in two (2) rows: i.e. each alternatively as shown on Roof Construction

Drawings. Along each row there will be a snow guard screwed to each standing seam of the sheet metal roof in an even alignment utilizing the stainless-steel set screws in the snow guard units to clamp them into place.

3.16 NEW METAL CLEANING:

Clean the roof and gutter system sheet metal surfaces to remove all debris, oils, stains, etc. in preparation for work on a daily basis. Maintain clean sheet metal surfaces throughout the project to insure proper conditions for soldering and other related work.

3.17 PAINT: Ensure all metal surfaces are cleaned to receive paint. Refer to project Specifications, Section 099123 (see Attachment 1) for quality assurance guidance and submittals.