SOW.pdf

TECHNICAL SPECIFICATIONS

Reroof Administration Building at the

Nulhegan Basin Division Silvio O. Conte National Wildlife Refuge (NWR)

Vermont

TABLE OF CONTENTS

SECTION TITLE

DIVISION 1 - GENERAL REQUIREMENTS

01010 Summary of Work

01300 Submittals

07510 Metal Roofing

Attachment

Building Plan and Elevation Drawings

SECTION 01010

SUMMARY OF WORK

1.01 DESCRIPTION OF WORK

1. The work to be accomplished under this contract consists of reroofing the Nulhegan Basin administration building with metal roofing.

Refer to the plan and elevation views of the building in the drawings to be included as an attachment to this document.

The existing asphalt roofing materials shall be removed and disposed of off site. There are sections of existing metal roofing that shall be removed and replaced with new metal roofing.

Replace 65 linear feet of existing gutters with 6” x 6” seamless metal gutters. Replace 35 linear feet of existing down spouts with 3” x 4” down spouts. Follow existing drain plan. 75 linear feet of rotten facia boards shall be replaced with the equal dimension pvc board before the new gutters are installed. New gutters shall have snow guards.

It is recommended that prospective contractors visit the site of the work, view the building and talk with Refuge Manager Steve Agius, so they understand the building conditions that they will need to address so the installed metal roof will be leak free upon completion of the metal roof installation. Install all valley and eave flashing per roof manufacturer’s recommended installation procedures to provide a weathertight seal. Flashing is also required where the roofing meets sidewall areas.

The building has issues with water penetrating the side wall above the primary entry annex. Install sidewall flashing to extend no less than 16” above the roofline.

A minimum of 4’ of ice and watershield (waterproof membrane) shall be installed along all drip edges.

2. Contractor shall furnish all labor, materials, equipment and incidentals necessary to complete the work in accordance with these specifications.

Agius, Steve On page 12 it says that the membrane should be 4’.

Yee, Richard (Rich) Updated here

1.02 LOCATION AND INSPECTION OF SITE

A. Prospective bidders should visit the site of work. Inspection of the site can be arranged by calling the Refuge Manager Steve Agius at 802 962-5240, extension 112. The work site is located at 5396 Route 105, Brunswick, VT 05905.

B. All inquiries concerning the specifications shall be made to the U. S. Fish and Wildlife Service, Contracting and General Services, 300 Westgate Center Drive, Hadley, MA, 01035.

1.03 FACILITY OPERATIONS

The refuge visitor center and administrative offices will continue operations during the performance of the contract.

The Contractor shall confine their operations to weekdays, Monday thru Friday (holidays excluded), between the hours of 7:30 a.m. to 4:30 p.m., unless they have prior approval of the Refuge Manager.

1.04 SAFETY

The Contractor shall be responsible for compliance with all provisions of Occupational Safety and Health Administration (OSHA) requirements.

1. CODE OF FEDERAL REGULATIONS (CFR)

a. 29 CFR 1910 Occupational Safety and Health Standards OSHA)

b. 29 CFR 1926 Safety and Health Regulations for Construction

1.05 CLEANUP

A. The Contractor shall clean up and dispose of daily, all rubbish and waste accumulation. Contaminated waste shall be disposed of according to regulations.

B. The Contractor shall, at completion of the project, remove tools and equipment, and leave the premises clean.

END OF SECTION 01010

SECTION 01300

SUBMITTALS

1.01 GENERAL

Prior to installation of any item, the Contractor shall submit and receive written approval per the procedures outlined below.

1.02 SUBMITTALS REQUIRED

Prior to the start of work, the Contractor shall submit product literature and information that indicates the furnished products for the project meets specification requirements.

Manufacturer's literature required:

Metal Roofing Materials and all components

END OF SECTION

SECTION 07510

METAL ROOFING

PART 1.0 - GENERAL

1.01 DESCRIPTION

A. WORK INCLUDED

1. Metal Roof Panels.

2. Flashing, perimeter flashing, closures, venting, eaves, ridge, rake, gable wall, curbs, or other roof curbs system flashings and accessories installed, and any other components specified within this contract or required to provide a weather tight roof system.

1.02 QUALITY ASSURANCE

A. ROOFER'S QUALIFICATIONS

1. The standing seam metal roofing and roof related accessories shall be provided and installed by one of the following:

a. Authorized Roofing Contractor of the Manufacturer.

b. Roofers authorized by the Manufacturer as trained and qualified to install the Manufacturer's product.

B. DESIGN CRITERIA

1. The Manufacturer of the Interlocking Standing Seam Roof Covering shall have been regularly engaged in the fabrication of metal standing seam roof systems for at least ten (10) years. All materials shall be new, unused, and free from defects.

2. The following standards and criteria shall be used where applicable in the structural design of the roof system covered by this Specification:

a. "MANUAL OF STEEL CONSTRUCTION", American Institute of

Steel Construction - 9th Edition

i. The Manufacturer shall be certified through the "AISC

Quality Certification" program in "Category MB".

ii. "COLD FORMED STEEL DESIGN MANUAL", American Iron & Steel Institute, 1986 Edition.

iii. Specific Building Code (Snow/wind loading criteria).

In the absence of specific design load criteria, ASCE- 7 (formerly ANSI A58.1) criteria may be used.

iv. The metal roof is required to withstand 120 MPH winds.

Roof panels, clips and fasteners shall be designed for a basic wind speed of 120 mph applied in accordance with the International Building Code.

The roof panel, clip and fastener shall have been tested and passed a wind uplift rating of UL Class 90 for the specified fastener spacing. The roof system shall be listed in Underwriters Laboratories "Roofing Materials and Systems Directory".

1.03 SUBMITTALS

A. The Contractor shall identify the standing seam metal roofing Manufacturer and authorized installer in the submittals.

B. SHOP DRAWINGS:

1. Submit shop drawings, clearly indicating scope of work, including roof panels, clips and fasteners, ventilation, typical flashing details and typical accessory details.

2. Submit Manufacturer's specifications on all sealants.

3. Submit applicable sample warranties of products with bid proposal.

4. Submit, for approval, descriptive data on all material to be provided. Data shall be sufficient to indicate conformance to specified requirements.

5. Submit Manufacturer's recommended installation method showing all requirements for panel installation, sealant application and substructural connections.

6. Submit Manufacturer's suggested material handling and material protection requirements.

1.04 WARRANTY

A. ROOF PANELS

1. Durability of the metallic coated unpainted roof panels due to rupture, structural failure or perforation shall be warranted for a period of twenty (20) years by the Manufacturer.

2. The exterior color finish for painted roof panels shall be warranted by the Manufacturer for twenty-five (25) years against blistering, peeling, cracking, flaking, checking and chipping.

3. Excessive color change and caulking of the painted roof panel finish shall be warranted for twenty (20) years.

B. WEATHERTIGHTNESS

1. The entire roof system including all roof panels, venting, flashings, curbs, etc. shall be warranted against leaks for a period of twenty (20) years and the warranty will be non-prorated.

2. The warranty shall be issued to the Owner by the

Manufacturer

3. The warranty liability shall be limited to the installed cost of all materials supplied by the roofing Manufacturer.

PART 2.0 - PRODUCTS

2.01 STANDING SEAM PANELS

A. MATERIALS

1. Steel roof panels shall be 22 gauge (minimum) interlocking standing seam, with a seam height of 1.5 inches to allow for the installation of future solar panels.

The exterior paint finish shall be galvalume (aluminum-zinc alloy) with an acrylic topcoat for corrosion resistance and longevity. The interior finish shall be 0.3 mil thick wash coat over 0.2 mil primer. Exterior color is to be selected by the Refuge Manager from Manufacturer's standard colors.

2. Roof panels with lap type side joints or those requiring battens or other non-integral sealing means or exposed structural fasteners shall not be considered acceptable.

3. Roof panels shall be roll formed in the Manufacturer's plant to control quality. On-site roll formed panels are not acceptable.

4. Roof panels shall have plant-installed sealant for quality control.

B. ROOF SYSTEM

1. Roof panels shall be of standing seam interlocking design and secured to the supports with a concealed structural fastening system.

2. The concealed attachment system shall eliminate all through fastener penetration of the exposed roofing surface into structural supports and allow the roof covering to move independently of any differential thermal movement by the framing system.

Agius, Steve What about going a little thicker steel (22 gauge) due to heavy snow and ice loads that are becoming more common with a changing climate?

Yee, Richard (Rich) updated

3. The panel-to-structural clip shall be designed to accommodate one (1.0) inch of thermal movement in both expansion and contraction (two inches total). The clip shall incorporate a self-centering feature to assure one (1.0) inch of movement capability in both directions.

4. The standing seam panels shall have integral male and female interlocking ribs with a plant applied, non-hardening sealant, and the seams shall be continuously locked or crimped together by mechanical means during installation.

5. Roof panels shall have flush horizontal and vertical surfaces, to facilitate sealing at terminations. Panel configurations which create voids requiring supplemental closure devices shall not be considered acceptable.

6. Roof panels shall be fastened to the support framing members with a concealed clip or backing device of steel having a protective metallic coating. Through penetration of the roofing surface by exposed fasteners shall occur only for non-structural connections at panel termination and roof perimeter flashing locations. Such fasteners shall be corrosion resistant aluminum-zinc alloy die cast head steel screws with weather seal washers.

7. Panel termination and perimeter flashings (attached to roof panels) shall be sealed with sealants recommended and furnished by the Manufacturer.

8. Required closures shall be metal. Non-metal closures will not be acceptable.

9. Install valley and eave flashing per roof manufacturer’s recommended installation procedures to provide a weathertight seal. Flashing is also required where the roofing meets sidewall areas.

2.02 TRIM SYSTEMS

A. Trim shall be designed to provide for expected movement of the roof panels due to thermal expansion and contraction. Details shall conform to the suggested details provided by the Manufacturer.

B. Color shall be selected from Manufacturer's standards. Finish on Manufacturer's standard trim items and flat sheets used for on-site trim fabrication shall conform to specifications for panels.

C. Trim components formed by the roofing contractor shall conform to details submitted and approved by the Architect, and approved by the Manufacturer.

2.03 ROOF ACCESSORIES

A. ROOF JACKS

1. For pipe penetration openings 12 inches in diameter or smaller, flash and seal these penetrations to the roof panel by roof jacks.

2. Roof jack material shall be EPDM with an aluminum sealing ring base.

3. Roof jacks are acceptable, providing attachments can be made in the flat of the panel and no standing seam rib has been altered. If a panel rib must be cut due to location of a penetration, a roof curb must be used.

4. Installation of roof jacks must comply with Manufacturer's instructions.

B. ROOF CURBS

1. SCOPE AND QUALITY

a. The roof curb unit(s) covered by this Specification shall be fabricated to the specifications of the roofing Manufacturer, thereby assuring compatibility with the roof construction framing and covering.

b. The roof curb shall be of the size and design as required for the roof. It shall support the specific ventilating device in a nominally horizontal position above the weather surface of the roof and adequately deflect storm drainage around its periphery.

c. All sealants, closures, and fasteners, etc., shall be included for proper installation and performance.

d. Roof vent curb and supporting framing shall provide for the expected expansion and contraction of the roof panels.

2. MATERIALS AND CONSTRUCTION

a. Metal roof curbs shall be provided with a horizontal flanged top projecting a minimum of 12" above the weather surface plane. The base shall fit the roof slope and shall be compatible with the roof panels to which it is flashed and/or sealed and fastened.

b. The curb shall be fabricated from the same or thicker stock thickness and shall match the color of the rest of the roof. All exterior seams are to be continuously welded and watertight.

c. Miscellaneous Materials:

i. Sealing compounds shall be as specified and supplied by the roofing Manufacturer.

ii. Closures and fasteners shall conform to the roofing Manufacturer's standards compatible with the roof covering finish.

3. INSTALLATION

a. Installation shall conform to the Roofing Manufacturer's details and instructions as with accepted trade practices.

2.04 ROOF MEMBRANE

A. Ice dam protection membrane shall be rubberized asphalt integrally bonded to sheet polyethylene, 55 mil thickness, meeting ASTM D1970. Install the membrane from the roof eave to a distance of 4’ along the roof, for all areas. Install roof membrane for all valley areas and at areas where the roofing meets sidewall areas, to provide a weathertight seal.

2.05 METAL ROOF SNOW GUARDS

A. Install metal roof snow and ice guards per the roof manufacturers' requirements, and at all the roof eave areas. The metal snow guards shall be stainless steel, with (ethylene propylene diene monomer (EPDM) rubber seal on the bottom. Provide color choice for selection by the Refuge manager.

2.06 PLYWOOD SHEATHING

A. Plywood sheathing shall conform to Product Standard PS1 “Construction and Industrial Plywood” and applicable standards of the American Plywood Association. Plywood shall have exterior grade coating for the roof sheathing purposes. Plywood shall match existing thickness assumed to be approximately 5/8” to ¾” thick.

2.07 Aluminum Gutters

Aluminum seamless gutters shall be 6” x 6”, 0.032 inch thick.

2.08 Aluminum Downspouts

Aluminum downspouts shall be 3” x 4”, 0.027 inch thick.

PART 3.0 - EXECUTION

3.02 INSTALLATION

A. Install all components within this section where indicated on manufacturers drawings, adhere all components firmly in place in complete accordance with approved shop drawings and the manufacturer's recommendations.

B. Remove protective strippable plastic film when and as instructed by metal roof Manufacturer.

C. Replace all panels damaged as a result of installer's failure to comply with roofing Manufacturer's instructions.

- END OF SECTION -

Attachment: Roof Plan And Elevation Drawings