DIVISION 2

TECHNICAL PROVISIONS

FOR

FIRE STATION # 7 PARTIAL ROOF

REPLACEMENT

SECTION 01100

SUMMARY

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and other Division 1 Specification Sections, apply to this Section.

B. Related Sections include the following:

1. Division 2, Section 07311 “Asphalt Shingles”

2. Division 2, Section 07591 “Roofing Preparation/Demolition”

3. Division 2, Section 07620 “Sheet Metal Flashing and Trim”

1.2 WORK COVERED BY CONTRACT DOCUMENTS

A. Project Name: York County Public Works Building Roof Replacement.

1. Project Location: 5684 Mooretown Road, Williamsburg, Virginia 23188

2. Owner: County of York

B. Engineer Identification: The Contract Documents were prepared for the Project by York

County Department of Public Works, 105 Service Drive, Yorktown, VA 23692.

1.3 WORK INCLUDED

A. This Section includes providing all labor, materials, equipment and supervision as outlined in the Specifications and Drawings. The following is a summary description of the Project:

1. Remove and dispose of the existing asphalt shingle roof system down to the existing plywood surface.

2. Remove and dispose of the existing gutters and downspouts.

3. Provide a new architectural shingle roof system on synthetic underlayment. The work will include providing new ice and water shield at valleys, eaves, rakes, ridges, transitions, and penetrations as shown in the Drawings.

4. Provide new flashing for the penetrations and new ridge vents as shown in the

Drawings.

5. Provide new aluminum flashing angle pieces for securing the existing fascia and rake board corners as shown in the Drawings.

6. Provide new aluminum sheet metal gutters, downspouts, roof edge metal, drip edge, step flashing, snow guards and other sheet metal flashings shown in the Drawings.

7. Provide new sealant along the sheet metal flashing at the existing building rakes and eaves as well as refasten any loose existing fascia and rake board.

8. Provide new permanent fall protection anchors.

9. Recertify the lightning rod system upon completion of work

10. Provide all necessary utility disconnects, reconnects, and utility extensions needed to complete the work.

11. Provide a one year contractor’s warranty for all work.

12. Provide a new 40 year manufacture's roof system warranty for the asphalt shingle roof systems.

1.4 USE OF PREMISES

A. General: Owner will occupy the facility during the Work; the Contractor shall coordinate the Work which will impact the use of the facility with the Owners onsite personnel.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

END OF SECTION 01100

SECTION 07311

ASPHALT SHINGLE ROOFING

I – GENERAL

1.1 SUMMARY

A. Section Includes:

1. Asphalt shingles

2. Fasteners

3. Ridge Vents

4. Underlayment

5. Sheathing

6. Ice and Water Shield

1.2 QUALITY ASSURANCE

A. Contractor shall be certified or otherwise qualified by the shingle manufacturer to install the roof system.

1.3 SUBMITTALS

A. Letter from shingle manufacturer confirming that the Contractor is qualified to install the roofing system and that the installation will be qualified to receive the manufacturer’s best available warranty.

B. Manufacturer's Data: data sheets, warranty information and product information including material properties, preparation requirements, proper handling storage and use of product and installation instructions for each product. Data shall demonstrate compliance with specification requirements.

C. Color Samples: for each different type of shingle (field, ridge, etc.), submit two samples representing manufacturer's full range of available colors and surface textures.

1.4 DELIVERY AND STORAGE

A. Materials shall be delivered in manufacturer’s unopened packaging with manufacturer’s name and brand marked clearly thereon. Materials shall be handled and stored in accordance with manufacturer’s printed instructions.

1.5 WARRANTY

A. Provide manufacturer’s standard warranty for the roofing system, minimum period to be 40 years; wind protection to at least 110 miles per hour. Warranty must include commercial structures.

B. Project Warranty: Roofing Installer's Warranty, on warranty form at end of section109, signed by roofing Installer, in which roofing Installer agrees to repair or replace components of shingle roofing that fails in materials or workmanship within the following warranty period:

1. Warranty Period: One year from date of Final Completion.

II– PRODUCTS

2.1 MATERIALS

A. Roof System: All Components of the roof system (shingles, underlayment, ice and water shield) are to be products manufactured or supplied by one manufacturer.

1. Shingles: fiberglass asphalt shingles, class A fire rating, exposure to be 5 5/8-inch, 110 mph minimum wind coverage, warranty 40 years minimum. Color to be selected by Owner from samples of manufacturer’s locally available products submitted by Contractor.

2. Underlayment: UV-stabilized polypropylene with minimum 180 day UV exposure.

3. Ice and Water Shield: Film surfaced, self-adhering ice and water shield.

4. Other accessories: Starter shingles, ridge shingles, ridge vents and other accessories shall be as recommended by manufacturer of the other system components. Ridge vent shall contain filter to help prevent weather infiltration.

5. Roof system shall be GAF (Timberline HD shingles, Deck Armor underlayment, and

Storm Guard or Weather Watch ice and water shield); Owens Corning (Duration shingles, Deck Defense underlayment, and Weather Lock ice and water shield); or CertainTeed (Landmark PRO shingles, DiamondDeck underlayment, and WinterGuard ice and water shield).

B. Fasteners:

1. Underlayment fasteners shall be corrosive-resistant, plastic-capped roofing nails with a minimum plastic cap diameter of one inch.

2. Roofing nails for fastening shingles shall be double hot dipped galvanized ring shank roofing nails with a minimum shank diameter of 0.120” and head diameter of 3/8”, Length as required to completely penetrate and extend ¼-inch below sheathing (1 1/2” minimum).

3. Framing members may be connected with either nails or screws of the proper size and type as determined by common practice.

4. Sheathing, both replacement and existing that may require additional fasteners, shall be attached with screws. Screws for sheathing may be steel provided they have a corrosive resistant coating, but will otherwise meet the requirements of section (5) below.

5. All other fasteners shall be either aluminum or stainless steel, shall be sized (length and diameter) to withstand expected loads and to resist pullout and shall be of the correct type for the purpose being used as determined by common practice. All screws shall have either a hex head and/or be of the square, Torx, or internal hex drive style (slotted or Phillips drive screws are not acceptable).

C. Sheathing:

1. Sheathing to replace existing plywood sheathing in accordance with the Allowance in the bid form, shall be: the same thickness as existing material; Grade C-D or better;

manufactured with exterior glue and have a minimum Span Rating of 24/0 or greater.

2. Plywood Clips to be used on new sheathing shall be “H” style, minimum 20 gauge, galvanized clips. Clips are to be Simpson Strong Tie PSCL Plywood Sheathing Clip or approved equal.

D. Asphalt Roof Cement: shall be asbestos free and compatible with roofing materials.

E. Permanent Fall Protection Anchors - Double D-ring: Permanent Roof Anchor with Stainless Steel

Body approximately 18 inches long; designed to be fastened under shingles, leaving D-rings Exposed for Attachment. Anchors shall be compliant with all OSHA and ANSI regulations associated with roof top fall protection anchor devices. Fall protection anchors shall be: Guardian Fall Protection Ridge-It SAFU Anchor Model 0511; Miller Double D Model RA40; or. Falltech Model 7431F.

F. Vents:

1. Plumbing vents shall have New Ultimate Pipe Flashing or equal installed over remaining vent pipe.

2. Gas vent accessories (e.g. storm collar and flashing) to be constructed of aluminum or stainless steel.

3. Other vents and vent piping: where drawings call for vents and other accessories to be replaced, the replacement shall be of the same basic size and configuration as the existing.

Openings in replacement vents shall contain baffling or other means to prevent water infiltration. Construction to be aluminum or stainless steel and when commercially available in different colors, provide in a color that most closely matches the finished roof as selected by Owner.

G. Platform Support:

1. Square platform supports shall have SBC Industries 1PC/Slipover square flashing installed over existing supports or approved equal.

III - EXECUTION

3.1 DEMOLITION

A. Remove and dispose of the existing roof system down to the roof deck, see Section 07591 “Roofing Preparation and Demolition”.

3.2 EXAMINATION

A. Once existing materials are removed, examine the roof sheathing to verify: that it is properly supported; is sufficiently flat; does not contain cracks or other defects in excess of roofing manufacturer’s limits; and that it is otherwise suitable for supporting the new roof system. Add additional fasteners where needed to properly secure the sheathing. Contractor shall notify Owner of any sheathing that needs to be replaced. If Owner concurs that replacement is needed, Contractor shall remove and replace the sheathing in accordance with the Allowance in the bid form. A minimum of two “H” style sheathing clips shall be installed between each pair of roof rafters at each joint.

B. Existing deck shall be cleaned off and prepared for new roofing in accordance with roofing manufacturer’s instructions and requirements.

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

3.3 UNDERLAYMENT INSTALLATION

A. Synthetic Underlayment: Install single layer of underlayment on roof deck perpendicular to roof slope in parallel courses. Lap sides a minimum of 3 inches over underlying course. Lap ends a minimum of 6 inches. Stagger end laps between succeeding courses at least 72 inches. Fasten with underlayment manufacturer’s recommended plastic cap nails using the recommended fastening pattern for high wind environments. Synthetic Underlayment will lie on top of the ice and water shield except at ridges. The bottom of the ice and water shield will be lapped over the synthetic underlayment by two to three inches.

B. Ice and Water Shield: Install ice and water shield; wrinkle free, on roof deck. Comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Install at locations indicated on Drawings, lapped in direction to shed water. Lap sides not less than 3-1/2 inches. Lap ends not less than 12 inches staggered 24 inches between courses. Roll laps with roller. Cover underlayment within seven days

1. Eaves and Rakes: Extend from edge of eaves and rakes 36 inches.

2. Roof Slope Transitions: Extend up vertical wall a minimum of 6 inches and onto deck 30 inches.

3. Valleys: 36 inch wide centered over the valley and additional 18 inch wide extending up slope on each side of the valley.

4. Ridge: 36 inch wide centered over ridge. Lap bottom of ice and water shield over synthetic underlayment by 2 inches minimum.

3.4 METAL FLASHING INSTALLATION

A. General: Install metal flashing and other sheet metal to comply with requirements in Division 2 Section 07620 “Sheet Metal Flashing and Trim.”

1. Install metal flashings according to recommendations in ARMA's "Residential Asphalt

Roofing Manual" and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual.”

B. Rake Drip Edges: Install rake drip edge flashings over underlayment and fasten to roof deck.

C. Eave Drip Edges: Install eave drip edge flashings below underlayment and fasten to roof deck.

D. Step Flashings: Install with a headlap of 2 inches and extend over the underlying asphalt shingle and up the vertical surface. Fasten to roof deck only.

3.5 ASPHALT SHINGLE INSTALLATION

A. Install asphalt shingles according to manufacturer's written instructions, recommendations in ARMA's "Residential Asphalt Roofing Manual," and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual.”

B. Install asphalt shingle starter course along lowest roof edge.

C. Install asphalt shingle bleeder strip along rake edge.

D. Extend asphalt shingles ½ inch over eaves and rake drip edge.

E. Install first and remaining courses of asphalt shingles stair stepping across roof deck with the shingle manufacturer’s recommended offset pattern at succeeding courses, maintaining uniform exposure.

F. Shingles shall be fastened in accordance with manufacturer’s instructions in order to achieve a wind rating of at least 110 mph. Alternative fastening patterns that require additional nails to achieve higher wind ratings are not necessary, provided that the 110 mph rating is achieved.

Pneumatic nailers shall not be used. All nails are to be hand driven in a manner that is in accordance with the shingle manufacturer’s instructions concerning the fastening of the shingles.

G. Closed-Cut Valleys: Extend asphalt shingle strips from one side of valley 12 inches beyond center of valley. Use one-piece shingle strips without joints in the valley. Fasten with extra nail in upper end of shingle. Install asphalt shingle courses from other side of valley and cut back to a straight line 2 inches short of valley centerline. Trim upper concealed corners of cut-back shingle strips.

1. Do not nail asphalt shingles within 6 inches of valley center.

2. Set trimmed, concealed-corner asphalt shingles in a 3-inch wide bed of asphalt roofing cement.

H. Ridge Vents: Install continuous ridge vents over asphalt shingles according to manufacturer's written instructions. Fasten with roofing nails of sufficient length to completely penetrate sheathing.

I. Ridge Cap Shingles: Maintain same exposure of cap shingles as roofing shingle exposure. Lap cap shingles at ridges to shed water away from direction of prevailing winds (north and east should be considered prevailing wind directions). Fasten with roofing nails of sufficient length to completely penetrate sheathing.

1. Fasten ridge cap asphalt shingles to cover ridge vent without obstructing airflow.

J. Upon completion of an area, avoid foot traffic as much as possible and do not store materials on the finished roof.

K. At tie-ins between new and old roofing install a waterproof tarp from the ridge to the eave and extend the tarp a minimum of 10 feet on each side of the tie-in. Temporarily ballast the tarp to prevent wind blow off.

3.6 PERMANENT FALL PROTECTION ANCHORS

A. Install the new anchor following the manufacturer’s installation instructions aligning it evenly over the ridge. Set the anchor in butyl sealant unless already factory applied. Secure the anchor using the fasteners required by the anchor manufacturer. Strip over the anchor with ice and water shield underlayment.

B. Install the ridge vent over the anchor.

END OF SECTION 07311

SECTION 07591

ROOFING PREPARATION AND DEMOLITION

PART 1 - GENERAL

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Roof demolition and disposal.

2. Preparation of surfaces for installation of new roofing.

3. Protection of existing roofing systems.

2. Division 2, Section 07620 “Sheet Metal Flashing and Trim”

1.3 MATERIALS OWNERSHIP

A. Except for items or materials indicated to be reused, reinstalled, or otherwise indicated to remain Owner's property, demolished materials shall become Contractor's property and shall be removed from Project site.

1.4 WORK INCLUDED

A. Provide all labor, materials, equipment, tools and supervision as required to remove and dispose of the existing asphalt shingles, felt paper, fasteners, mastic, flashing, sheet metal flashing and other existing roof materials down to the original plywood sheathing.

B. The Contractor shall designate a representative and furnish a telephone at which the representative may be contacted at any time. This representative shall be empowered and authorized to provide such personnel and equipment as may be required to remedy emergency situations that may develop after normal working hours, or on weekends and holidays.

C. Provide for the proper disposal of all existing materials removed. Provide approved trash receptacles located in areas designated by the Owner's representative.

D. Coordinate the roof preparation work with the new roofing work in such a manner as to keep the new roofing materials, building, and building interior absolutely clean, dry and watertight.

E. The Contractor expressly undertakes both directly and through his Subcontractors, to take every reasonable precaution at all times for the protection of all persons and property which may come on the Site or be affected by the Contractor's Work.

F. The Contractor shall be solely responsible for initiating, maintaining and supervising all safety precautions and programs in connection with the Work.

G. The provisions of all Federal, State and local rules and regulations governing health and safety as adopted by the relevant authority, shall apply to all Work under this Contract.

H. The Contractor shall continuously maintain adequate protection of all his Work from damage and shall protect the Owner's property from injury or loss arising in connection with this Contract. He shall make good any such damage, injury or loss, except as may be directly and solely due to errors in the Contract Documents or caused by agents or employees of the Owner. The Contractor shall adequately protect adjacent property to prevent any damage to it or loss of use and enjoyment by its owners. The Contractor shall provide and maintain all passageways, guard fences, lights and other facilities for protection as required by State or local authority, local conditions, or the Contract.

1.5 DEFINITIONS

A. Roofing Terminology: Refer to ASTM D 1079 and glossary in NRCA's "The NRCA Roofing and Waterproofing Manual" for definition of terms related to roofing work in this Section.

1.6 SUBMITTALS

A. Photographs or Videotape: Show existing conditions of adjoining construction and site improvements, including exterior and interior finish surfaces that might be misconstrued as having been damaged by roofing operations. Submit before Work begins.

1.7 QUALITY ASSURANCE

A. Regulatory Requirements: Comply with governing regulations before beginning membrane roofing removal. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Preliminary Roofing Conference: Conduct conference at Project site to review methods and procedures related to the roofing system work including, but not limited to, the following:

1. Meet with Owner; Engineer; inspecting agency representative; roofing system manufacturer's representative; roofing Installer including project manager, superintendent, and foreman; and installers whose work interfaces with or affects re-roofing.

2. Review methods and procedures related to roof preparation, including membrane roofing system manufacturer's written instructions.

3. Review temporary protection requirements for existing roofing system that is to remain, during and after installation.

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

5. Review flashings, special roofing details, drainage, penetrations and condition of other construction that will affect roofing.

6. Review existing conditions that may require notification of Engineer before proceeding.

7. Review procedures to insure no water damage during construction.

1.8 PROJECT CONDITIONS

A. Owner will occupy the building immediately below roof area. Conduct roofing so Owner's operations will not be disrupted. Provide Owner with not less than 24 hours notice of activities that may affect Owner's operations. The facility must remain operational 24 hours per day 7 days per week.

1. Coordinate work activities daily with Owner.

B. Protect building to be roofed, adjacent buildings, walkways, site improvements, exterior plantings, and landscaping from damage or soiling from roofing operations.

C. Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities.

D. Owner assumes no responsibility for condition of areas to be roofed.

1. Conditions existing at time of inspection for bidding will be maintained by Owner as far as practical.

E. Weather Limitations: Proceed with roofing preparation only when existing and forecasted weather conditions permit Work to proceed without water entering into existing roofing system or building.

1.9 REMOVAL, HANDLING AND DISPOSAL OF ROOFING MATERIALS

A. Codes and Regulations:

1. General Applicability of Codes, Regulations, and Standards

a. Except to the extent that more explicit or more stringent requirements are written directly into the contract documents, all applicable codes, regulations, and standards have the same force and effect and are made a part of the contract documents by reference as if copied directly into the contract documents, or as if published copies are bound herewith.

2. Contractor Responsibility:

a. The Contractor shall assume full responsibility and liability for the compliance with all applicable Federal, State, and local regulations pertaining to work practices, hauling, disposal, and protection of workers, visitors to the site, and persons occupying areas adjacent to the site. The Contractor is responsible for providing medical examinations and maintaining medical records of personnel as required by the applicable Federal, State, and local regulations. The Contractor shall hold the Owner, the Owner's Representative and the Consultant harmless for failure to comply with any applicable work, hauling, disposal, safety, health or other regulation on the part of himself, his employees, or his subcontractors.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect roofing systems which have been completed.

1. Limit traffic and material storage to areas of existing roofing membrane that have been protected.

2. Maintain temporary protection and leave in place until replacement roofing has been completed.

B. During removal operations, have sufficient and suitable materials on-site to facilitate rapid installation of temporary protection in the event of unexpected rain.

3.2 ROOF TEAR-OFF

A. General: Notify Owner each day of extent of roof tear-off proposed and obtain authorization to proceed.

B. Review weather conditions to verify there is no forecasted rain. Have tarps of sufficient size on site to cover the entire proposed work area from eave to ridge and extend 10 feet beyond the work area on all sides in the event of unforeseen weather changes. No tear-off shall be performed unless the tarps are on site and readily accessible.

C. Roof Tear-Off: Remove existing asphalt shingles down to the existing wood decking as shown in the drawings. Only tear off a portion of the roof that can be reroofed with permanent roof by the end of the work day. At no time shall the roof be left overnight with temporary roofing on it unless interrupted by unforeseen rain.

1. Remove and dispose existing asphalt shingles, single ply roof membrane, felt paper, fasteners, mastic, ridge vents, flashing, insulation, sheet metal flashing and other items not indicated “to remain” or “existing” in the project Drawings down to the oriented strand board sheathing.

2. Remove and dispose of the existing gutters and downspouts.

3.3 DECK PREPARATION

A. Inspect deck after tear-off of the roof systems. Replace deteriorated sheathing encountered.

Replacement of sheathing must be verified by the Owners representative.

B. If deck surface is not suitable for receiving new roofing, or if structural integrity of deck is suspect, immediately notify Engineer. Do not proceed with installation until directed by Engineer.

C. Sweep all roof surfaces clean of debris, no debris shall remain prior to installing the roofing systems.

3.4 DISPOSAL

A. Collect and place demolished materials in containers. Promptly dispose of demolished materials.

Do not allow demolished materials to accumulate on-site.

1. Storage or sale of demolished items or materials on-site will not be permitted.

B. Transport demolished materials off Owner’s property and legally dispose of them.

C. Properly dispose of all debris from roof demolition and preparation on a daily basis into a properly labeled trash receptacle as required by applicable regulations.

D. Provide closed trash chutes or other approved means for removal of debris to the ground level.

3.5 PROTECTION OF SURFACES

A. Contractor shall take all necessary precautions during roof preparation to protect the building and adjacent surfaces from being soiled or damaged.

B. When weather threatens, cease work under this section and return roof to a watertight condition.

Cover the entire work area with tarps extending from eave to ridge and 10 feet beyond the work area.

C. Contractor shall restore to original condition any damages caused during work performed in this

Section.

D. Contractor shall return the roof system to a watertight condition at the end of each workday.

3.6 CLEAN-UP

A. Prior to the completion of the work, remove from the job site all tools, equipment, debris and waste and properly dispose of offsite.

END OF SECTION 07591

SECTION 07620

SHEET METAL FLASHING AND TRIM

PART 1 - GENERAL

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes providing all labor, materials, equipment and supervision as outlined in the Specifications and Drawings. The following is a brief description of the Work:

1. Formed roof edge metal flashing.

2. Gutters and downspouts.

2. Division 2, Section 07591 “Roof Preparation/Demolition”

1.3 REFERENCES

A. Sheet Metal and Air Conditioning Contractor’s National Association (SMACNA), Architectural Sheet Metal Manual, 7th Edition

1.4 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, rattling, leaking, and fastener disengagement.

B. Water Infiltration: Provide sheet metal flashing and trim that do not allow water infiltration.

1.5 SUBMITTALS

A. Product Data: For each type of product indicated. Include color charts and manufacturers technical data sheet with material descriptions and finishes.

1.6 QUALITY ASSURANCE

A. Sheet Metal Flashing and Trim Standard: Comply with SMACNA's "Architectural Sheet Metal Manual – 7th Edition." Conform to dimensions and profiles shown unless more stringent requirements are indicated.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver sheet metal flashing materials and fabrications undamaged. Protect sheet metal flashing and trim materials and fabrications during transportation and handling.

B. Unload, store, and install sheet metal flashing materials and fabrications in a manner to prevent bending, warping, twisting, and surface damage.

C. Stack materials on platforms or pallets, covered with suitable weather tight and ventilated covering.

Do not store sheet metal flashing and trim materials in contact with other materials that might cause staining, denting, or other surface damage.

1.8 COORDINATION

A. Coordinate installation of sheet metal flashing and trim with interfacing and adjoining construction to provide a leak proof, secure, and non-corrosive installation.

1.9 WARRANTY

A. Provide aluminum coating manufacturer's warranty in which manufacturer agrees to repair finish or flashing, trim or accessory that shows deterioration of factory applied finishes for a minimum of 20 years. Deterioration includes color fading in excess of five Hunter units (ASTM D2244); chalking in excess of a rating of eight (ASTM D4214); cracking; peeling; or adhesion failure to the base metal.

B. Provide contractor warranty covering defects in installation of the sheet metal components for a period of one year.

PART 2 - PRODUCTS

2.1 SHEET METALS

A. Copper Sheet: ASTM B 370, Temper H00 or H01, cold-rolled copper sheet, 16 ounce per square foot.

B. Prefinished Aluminum Flashing: Aluminum sheet meeting ASTM B 209, Alloy 3005H25, or alloy and temper suitable for forming and structural performance required, but not less than H14, finished as follows:

1. High-Performance Organic Finish: AA-C12C42R1x (Chemical Finish: cleaned with inhibited chemicals; Chemical Finish: acid-chromate-fluoride-phosphate conversion coating;

Organic Coating: as specified below). Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

a. Fluoropolymer 2-Coat System: Manufacturer's standard 2-coat, thermocured system consisting of specially formulated inhibitive primer and fluoropolymer color topcoat containing not less than 70 percent (KYNAR 500) fluoropolymer resin by weight.

1) Color: To be selected by Owner from manufacturer’s full range.

2.2 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous items as required for complete sheet metal flashing and trim installation.

B. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and bolts, and other suitable fasteners designed to withstand design loads. Screws shall be hex, star or square drive, NO slotted or Philips head screws.

1. Concealed nails for Aluminum Sheet: Stainless steel ring shank roofing nails

2. Exposed Fasteners: Stainless steel nails with heads matching color of sheet metal by factory-applied coating.

3. Fasteners for Flashing and Trim: Blind fasteners or self-drilling screws, gasketed, with hex washer head.

4. Blind Fasteners: High-strength aluminum, copper or stainless-steel rivets, to match materials being fastened.

5. Expansion Anchors: Stainless Steel Hammer Drive Pin Anchor.

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

D. Polyurethane Sealant: ASTM C 920, elastomeric one component polyurethane sealant as indicated in drawings; of type, grade, class, and use classifications required to seal joints in sheet metal flashing and trim and remain watertight.

1. Type and Grade: S (single component) and NS (nonsag).

2. Class: 25.

3. Uses Related to Exposure: NT (nontraffic).

E. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant manufacturer for preventing sealant from adhering to rigid, inflexible joint-filler materials or joint surfaces at back of joint where such adhesion would result in sealant failure. Provide self-adhesive tape where applicable.

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. Solder for Copper: ASTM B 32, Grade Sn50, 50 percent tin and 50 percent lead.

H. Solder for Lead: ASTM B 32, Grade Sn50, 50 percent tin and 50 percent lead.

2.3 FABRICATION, GENERAL

A. General: Custom fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, metal, and other characteristics of item indicated. Shops fabricate items where practicable. Obtain field measurements for accurate fit before shop fabrication.

B. Fabricate sheet metal flashing and trim in thickness or weight and shapes shown in the Drawings.

C. Fabricate sheet metal flashing and trim without excessive oil canning, buckling, and tool marks and true to line and levels indicated, with exposed edges folded back to form hems.

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

E. Expansion Provisions: Where lapped or bayonet-type expansion provisions in the Work cannot be used, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant concealed within joints.

F. Conceal fasteners and expansion provisions where possible on exposed-to-view sheet metal flashing and trim, unless otherwise indicated.

2.4 ROOF DRAINAGE SHEET METAL FABRICATIONS

A. Hanging Gutters: Fabricate to cross section indicated, complete with end pieces, outlet tubes, and other accessories as required. Fabricate in minimum 120-inch long sections. Furnish flat-stock gutter spacers and gutter brackets fabricated from same metal as gutters, of size shown in the Drawings. Fabricate expansion joints, expansion-joint covers and gutter accessories from same metal as gutters.

1. Gutter Style: Type A, Box Gutter.

2. Expansion Joints: Butt type.

3. Fabricate Gutters from the following material:

a. Pre-finished Aluminum: 0.040 inch thick.

4. Gutter Bracket: Fabricate from 1/4" x 1" Aluminum bar stock and paint to match gutter.

5. Gutter Spacer: Fabricate from 1/16" x 1" aluminum bar stock and paint to match gutter.

B. Downspout Bracket & Spacer: Fabricate rectangular downspouts complete with mitered elbows to extend downspout to grade or to existing below grade drainage system. Furnish with metal brackets and spacers, from same material as downspouts, and anchors.

1. Hanger Style: Fabricate from 3/16” Aluminum

2. Fabricate downspouts and downspout cleanouts from the following material:

a. Prefinished Aluminum: 0.032 inch thick.

2.5 STEEP-SLOPE ROOF SHEET METAL FABRICATIONS

A. Step flashing: Fabricate from the following material:

1. Copper: 16 oz./sq. ft., 5" x 5" x 10" minimum length.

B. Drip Edges (rake and eaves): Fabricate with 3/4" minimum hemmed drip, vertical face as shown on Drawings and 4 inch minimum leg to extend onto the roof deck. Fabricate from the following material:

1. Prefinished Aluminum: 0.032 inch thick.

C. Gas Vent Pipe Flashing: Fabricate from the following materials:

1. Copper: 16 oz./sq. ft.

2.6 FINISHES

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Protect mechanical and painted finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping.

C. Appearance of Finished Work: Variations in appearance of abutting or adjacent pieces are acceptable if they are within one-half of the range of approved Samples. Noticeable variations in the same piece are not acceptable. Variations in appearance of other components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, to verify actual locations, dimensions and other conditions affecting performance of work.

1. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely anchored.

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

3.2 INSTALLATION, GENERAL

A. General: Anchor sheet metal flashing and trim and other components of the Work securely in place, with provisions for thermal and structural movement. Use fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous items as required to complete sheet metal flashing and trim system.

1. Torch cutting of sheet metal flashing and trim is not permitted.

B. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by painting contact surfaces with bituminous coating or by other permanent separation as recommended by fabricator or manufacturers of dissimilar metals.

1. Coat side of uncoated aluminum sheet metal flashing and trim with bituminous coating where flashing and trim will contact wood, ferrous metal, or cementitious construction.

2. Underlayment: Where installing metal flashing directly on cementitious or wood substrates, install a course of felt underlayment and cover with a slip sheet or install a course of polyethylene underlayment.

3. Bed flanges in thick coat of asphalt roofing cement where required for waterproof performance. Prime metal flanges when in contact with asphalt materials.

C. Install exposed sheet metal flashing and trim without excessive oil canning, buckling, and tool marks.

D. Install sheet metal flashing and trim true to line and levels indicated. Provide uniform, neat seams with minimum exposure of solder, welds, and sealant.

E. Install sheet metal flashing and trim to fit substrates and to result in watertight performance. Verify shapes and dimensions of surfaces to be covered before fabricating sheet metal.

F. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at a maximum of 10 feet with no joints allowed within 24 inches of corner or intersection. Where lapped or bayonet-type expansion provisions cannot be used or would not be sufficiently watertight, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant concealed within joints.

G. Fasteners: Use fasteners of sizes that will penetrate substrate not less than 1-1/4 inches for nails and not less than 3/4 inch for wood screws.

1. Aluminum: Use aluminum or stainless-steel fasteners.

2. Copper Use copper or stainless-steel fasteners.

H. Seal joints with butyl sealant as required for watertight construction.

1. Where sealant-filled joints are used, embed hooked flanges of joint members not less than 1 inch into sealant. Form joints to completely conceal sealant. When ambient temperature at time of installation is moderate, between 40 and 70 deg F, 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.

I. Soldered Joints: Solder all copper joints. Clean surfaces to be soldered, removing oils and foreign matter. Pretin edges of sheets to be soldered to a width of 1-1/2 inch except where pretinned surface would show in finished Work.

1. Copper Soldering: Tin uncoated copper surfaces at edges of sheets using solder recommended for copper work.

2. Do not use open-flame torches for soldering. Heat surfaces to receive solder and flow solder into joints. Fill joints completely. Completely remove flux and spatter from exposed surfaces.

J. Aluminum Flashing: Rivet or weld joints in uncoated aluminum where necessary for strength.

3.3 ROOF DRAINAGE SYSTEM INSTALLATION

A. General: Install sheet metal roof drainage items to produce complete roof drainage system according to SMACNA recommendations and as indicated. Coordinate installation of roof perimeter flashing with installation of roof drainage system.

B. Hanging Gutters: Join sections with riveted and soldered joints or with lapped joints sealed with butyl sealant. Provide for thermal expansion. Attach gutters at eave or fascia to firmly anchored gutter brackets spaced not more than 36 inches apart. Provide end closures and seal watertight with sealant. Slope to downspouts.

1. Fasten gutter spacers to front and back of gutter.

2. Install gutter with expansion joints at locations indicated. Install expansion joint caps.

C. Downspouts: Join sections with 1-1/2-inch telescoping joints. Provide fasteners designed to hold downspouts securely 1 inch away from walls; locate fasteners at top and bottom and at approximately 60 inches o.c. in between.

1. Provide elbows at base of downspout to direct water away from building.

2. Connect downspouts to underground drainage system where existing.

D. Expansion-Joint Covers: Install expansion-joint covers at locations and of configuration indicated.

Lap joints a minimum of 4 inches in direction of water flow.

3.4 ROOF FLASHING INSTALLATION

A. General: Install sheet metal roof flashing and trim to comply with performance requirements and SMACNA's "Architectural Sheet Metal Manual." Provide concealed fasteners where possible, set units true to line, and level as indicated. Install work with laps, joints, and seams that will be permanently watertight.

B. Roof Edge Flashing: Anchor to resist uplift and outward forces.

1. Interlock bottom edge of roof edge flashing with continuous cleats anchored to substrate at 12-inch centers.

C. Counterflashing: Coordinate installation of counterflashing with installation of reglet mounted flashing. Insert counterflashing in reglets or receivers and fit tightly to base flashing. Extend counterflashing 4 inches min. over step flashing. Lap counterflashing joints a minimum of 4 inches and bed with butyl sealant.

1. Secure in a waterproof manner by means of snap-in installation and sealant or lead wedges and sealant at reglet mounted conditions and interlocking at through wall conditions.

D. Roof-Penetration Flashing: Coordinate installation of roof-penetration flashing with installation of roofing and other items penetrating roof. Install flashing as follows:

3.5 CLEANING AND PROTECTION

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

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

C. Remove temporary protective coverings and strippable films as sheet metal flashing and trim are installed. On completion of installation, clean finished surfaces, including removing unused fasteners, metal filings, pop rivet stems, and pieces of flashing. Maintain in a clean condition during construction.

D. Replace sheet metal flashing and trim that have been damaged or that have deteriorated beyond successful repair by finish touchup or similar minor repair procedures.

END OF SECTION 07620

SECTION 07 72 53

SNOW GUARDS

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes:

1. Provide snow guards at perimeter eave and upslope side of vent pipe penetrations.

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions, Division 1 Specification Sections and the following Specification Sections, apply to this Section:

1.3 REFERENCE STANDARDS

A. ASTM B85/B85M - Standard Specification for Aluminum-Alloy Die Castings; 2025.

B. ASTM B221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes; 2021.

1.4 SUBMITTALS

A. Product Data: Manufacturer's Product Data Sheets for all materials specified certifying material complies with all specified requirements.

B. Manufacturer's Instructions: Latest edition of the Manufacturer's current material specifications and installation instructions.

C. Shop Drawings: Snow Guard Layout and Attachment Details

1. Include engineering calculations to document snow guard layout will support the design snow load and snow drift for the building.

1.5 DELEGATED DESIGN

A. Design of snow guard layout by a Virginia registered Professional Engineer (PE).

1.6 DELIVERY, STORAGE, AND HANDLING

A. Packing and Shipping: Deliver materials to site in Manufacturer's original unopened packaging with labels intact.

B. Storage: Adequately protect against damage while stored at the site.

C. Handling: Comply with Manufacturer's instructions.

1.7 PROJECT CONDITIONS

A. Field Measurements: Verify dimensions required.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers:

1. S-5! Colorgard

2. Engineer's Accepted Equivalent.

2.2 MATERIALS

A. Snow Guards for Standing Seam Metal Roofs:

1. Clamps:

a. Manufactured from 6061-T6 Aluminum extrusions conforming to ASTM B221 or aluminum castings conforming to ASTM B85/B85M and to AA Aluminum Standards and Data.

b. Clamp Model: Designed for attachment to metal panel seam configuration.

c. Set Screws: 300 series stainless steel, 18-8 alloy, 3/8 inch diameter, with round nose point.

d. Attachment Bolts: 300 series stainless steel, 18-8 alloy, 10 mm diameter, with flat washers.

2. Cross Members:

a. Manufactured from 6061-T6 alloy and temper aluminum extrusions conforming to ASTM B221 and to AA Aluminum Standards and Data.

b. Receptacle face to receive color-matched metal strips.

c. Provide splice connectors ensuring alignment and structural continuity at end joints.

3. Color Strips:

a. Same material and finish as roof panels, obtained from roof panel manufacturer.

4. Snow and Ice Clips: Aluminum, with rubber foot, minimum 3 inches wide.

PART 3 EXECUTION

3.1 EXAMINATION

A. Examine substrates to receive Work and report detrimental conditions in writing to Engineer. Commencement of Work will be construed as acceptance of substrates.

B. Coordinate with other Work which affects, connects with, or will be concealed by this Work.

3.2 INSTALLATION

A. Install snow guard per manufacturer's instructions at locations indicated in the Contract Documents and approved Shop Drawings.

3.3 ADJUSTING

A. Remove and replace damaged snow guards with new material.

3.4 CLEANING

A. During the course of the Work and on completion, remove and dispose of excess materials, equipment and debris away from premises.

END OF SECTION

SECTION 08 62 00

UNIT SKYLIGHTS

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes:

1. Replace unit skylights with curb mounted plastic skylights with fall protection screen.

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions, Division 1 Specification Sections and the following Specification Sections, apply to this Section:

1.3 REFERENCE STANDARDS

A. AA DAF-45 - Designation System for Aluminum Finishes; 2003 (Reaffirmed 2009).

B. ASTM B221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes; 2021.

C. ASTM D256 - Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics; 2024.

D. ASTM D635 - Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position; 2022.

E. ASTM D1929 - Standard Test Method for Determining Ignition Temperature of Plastics; 2023.

F. ASTM D2843 - Standard Test Method for Density of Smoke from the Burning or Decomposition of Plastics; 2022.

G. NAAMM AMP 500-06 - Metal Finishes Manual; 2006.

1.4 SUBMITTALS

A. Product Data: Manufacturer's Product Data Sheets for materials specified certifying material complies with specified requirements.

B. Manufacturer's Instructions: Latest edition of the Manufacturer's current material specifications and installation instructions.

C. Samples for Selection: Manufacturer's color charts showing a range of colors available for each type of skylight glazing and Aluminum Finish.

1.5 PERFORMANCE REQUIREMENTS

A. General: Provide unit skylights capable of withstanding loads indicated without failure. Failure includes the following:

1. Thermal stresses transferred to the building structure.

2. Framing members transferring stresses, including those caused by thermal and structural movement, to glazing.

3. Noise or vibration created by thermal and structural movement and wind.

4. Weakening of fasteners, attachments, and other components.

B. Structural Loads: Provide unit skylights that meet the requirements of American Architectural Manufacturer's Association (AAMA) publication "Voluntary Uniform Load Structural Standard for Plastic Domed Skylights" (AAMA 1606-82) which requires acrylic thickness adequate to withstand a positive and negative test pressure of 60 PSF.

C. Fire-Test-Response Characteristics: Provide thermoformed domes fabricated from sheets identical to those tested for the following fire-test-response characteristics, per ASTM test method indicated below, by UL or other testing and inspecting agencies acceptable to authorities having jurisdiction. Identify plastic sheets with appropriate markings of applicable testing and inspecting organization.

1. Self-Ignition Temperature: 651 deg F or greater when tested per ASTM D1929 on plastic sheets in the thickness intended for use.

2. Smoke density of 75 or less when tested per ASTM ASTM D2843 on plastic sheets in the thickness intended for use.

3. Relative-Burning Characteristics: As follows, when tested per ASTM D635:

a. Polycarbonate: (when specified) Burning extent of 1 inch or less when tested on plastic glazing indicated below with a nominal thickness of 0.060 inch or the thickness intended for use.

1.6 WARRANTY

A. Skylight Warranty: Provide written warranty signed by manufacturer, agreeing to repair or replace work that exhibits defects in materials or workmanship and guaranteeing weather-tight and leak-free performance. Defects are defined as uncontrolled leakage of water and abnormal aging or deterioration.

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

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by:

1. Velux America LLC

2. American Skylights

3. Kingspan

2.2 PLASTIC SKYLIGHT UNITS

A. Products:

1. Wasco-Velux CMT2

2. American Skylights Model TCM-FG

3. Kingspan Acrylic Skylight - Series 1400

B. Shape and Size: As indicated by model number and to properly fit on roof curb.

C. Curb Frame: Bright white high-performance PVC with Bronze cap stock and minimum effective thickness of 0.060 inch. Provide integral condensation gutter and weep system with corners welded for waterproof quality.

D. Retainer Frame: Extruded aluminum alloy 6063-T5 min. ASTM B221/ASTM B221M with minimum effective thickness of 0.60 inch.

E. Plastic Sheets: Monolithic, formable, transparent (colorless and tinted) or translucent (white) sheets with good weather and impact resistant.

1. Polycarbonate: Thermoformable, monolithic polycarbonate sheets manufactured by the extrusion process, category C-1 or CC-1, type. UV resistant, burglar resistance rated per UL 972 with average impact strength of 12 to 16 ft-lb/inch of width when tested according to ASTM D256 ASTM D 256, Test Method A (Izod).

F. Thermal Break: Fabricate skylight units with thermal barrier separating interior metal framing…