B08_Attachment_2_-_THST_Statement_of_Work_-_Roofing_and_Gutters.pdf

STATEMENT OF WORK (SOW)

Thomas Stone National Historic Site

Standing Seam Metal Roof and Seamless Gutters

BACKGROUND AND PURPOSE

In 1776, Thomas Stone and 55 others signed the Declaration of Independence. In doing so, Stone risked his home, his family's security, and even his life to support the Declaration of Independence's promise of freedom. Thomas Stone National Historic Site (THST) managed by the National Park

Service, preserves the ancestral home of Thomas Stone. The park is situated in historic Southern

Maryland, within an easy drive from Washington, D.C.

The park’s visitor center is the main contact station for all visitors that come to the park. The visitor center building currently has an exposed-fastener corrugated metal roof that’ll be replaced with a new hidden-fastener standing seam metal roof. Project includes the installation of new seamless gutters and downspouts.

GENERAL INFORMATION

1. This contract is a Fixed-Firm Price contract for the installation of a new “Vertical Seam” metal roofing system and seamless gutters. Work consists of removing and disposal of the existing metal roof, underlayment, damaged sheathing boards and associated flashing components. The contractor will inspect existing roof deck to determine if any sheathing boards need to be replaced. The contractor will provide a new snap seam roofing system, including high-temperature resistance self-adhered membrane underlayment, fasteners, and manufactured flashing components. The new roof must include snow guards installed staggered pattern toward the eaves of the roof. Work includes the installation of new seamless “K-Style” gutters and downspouts. The work will require the contractor to maintain public access to the visitor center during the demolition and installation of the new metal roof. Work will also include daily site clean-up and disposal of debris.

2. Current Conditions: The visitor center building’s roof is a 12/12 step pitch, with approximately

6,000 square feet of exposed fastener metal roofing. Two small sections of roof on the back are flat.

3. Location: Thomas Stone NHS 6655 Rose Hill Road, Port Tobacco, Maryland 20677.

4. Regular Working Hours: Work is to be performed between 7am and 3:30pm, Monday through Friday. No work is to be performed on Saturday or Sunday or federally recognized holidays (unless otherwise authorized by the Contracting Officer’s Representative 72 Hours ahead of the date of work).

5. Period of Performance: 60 calendar days after Notice to Proceed is issued.

6. Notification: The Contractor shall notify the Contracting Officer (CO) and the Contracting

Officers Representative (COR) who serves as the single point of contact, at least 48 hours in advance for all work in occupied housing units or other facilities located within the park.

7. Waste Disposal: The Contractor shall properly dispose of solid waste materials offsite.

8. Park: Thomas Stone NHS (THST).

DESCRIPTION OF WORK

1. Contractor shall provide all labor, equipment, material, and supervision for the installation of new standing seam metal roof system, gutters and downspouts on the Thomas Stone Visitor

Center building.

2. Contractor shall remove and dispose of existing metal roof panels, old step flashing, old counter flashing, old valley flashing on the visitor center building. All related construction debris generated from the removal or installation process must be collected and disposed of properly in accordance with applicable Federal and State regulations.

3. Contractor shall inspect and replace damaged sheathing boards (roof decking) as needed.

Fasten the plywood sheathing to the rafters using 8d smooth shank framing nail. (Plywood Nail

Pattern shall be 6-inch on center along the perimeter and 12-inch on center in the field).

4. Contractor shall clean and prepare the roof decking before installing new roof components.

• Remove all old fasteners (screws, nails, stables, etc.)

• Clean entire roof decking (dirt, caulking, debris, etc.)

5. Contractor will increase the pitch of two (2) flat sections of the roof structure. These two (2) flat areas are located on the backside of the roof. The contractor will increase the pitch by framing the sections of roof structure and installing 5/8-inch CDX plywood sheathing. A custom metal pan will be made using the same metal as the new roofing. The new metal pan will cover the low-pitch roof sections.

6. Contractor shall install high-temperature resistance self-adhered membrane underlayment over the entire roof decking. Underlayment will overlap 2-inches on all eaves and all gable end rakes. Fasten the underlayment to the plywood sheathing using 1-inch plastic cap nails.

• Smooth surfaced (non-granulated)

• High temperature resistance (minimum 240º F)

• Minimum thickness of 40 mil

• Approved by the underlayment manufacturer for application under metal roofing

7. The contractor shall install the “Vertical Seam” snap seam metal roof system according to the manufacturer's specifications. Including snow guards and new pipe boot flashings.

8. Product Information and Specifications:

• Painted Snap Seam Standing Seam o 1.75″ high snap-lock style ribs o 18″ wide panel o thickness 24-gauge metal o Minor Ribs

• Color – Bright Red

• Warranty & Finish - Painted Snap Seam carries a 50-year paint warranty

8. Snow Guards:

• 85RF Deco Series - Standing Seam Snow Guard, Painted

• S-5-N Clamp - Standing Seam Clamp - For 85RF Snow Guards

• Color – Bright Red

To ensure the proper placement and installation of the 85RF Deco Series - Standing Seam Snow

Guard, follow these steps:

• Fasten the clamp according to the manufacturer's instructions for proper torque.

• Install the guards in a staggered pattern for optimal performance.

• Fasten the 85RF DECOTM to the clamp using the clamp manufacturer's bolt, ensuring th e face plate is towards the eave.

• Secure the bolt tightly to prevent any potential issues with the snow guard.

It is crucial to install the guards correctly with the appropriate quantities and not just over doorways or walkways.

9. Colored EPDM Pipe Boot Flashings (Round)

10. The contractor shall install seamless gutters and downspouts.

• 6-inch “K” Style Seamless Gutter

• .032” Gauge

• Color – White

• Screw-Type Hidden Hangers

• 3-inch x 4-inch Corrugated Downspouts

Standing Seam - Wood Substrate Detail

Architectural / Solid Substrate / Steep Slope

The following details are commonly used with steep sloped applications including those over solid substrates such as plywood. Such details are largely based on hydrokinetic (water-shedding) design principles and architectural detailing.

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Eave Detail (with gutter)

Gable Detail (extended drip edge style)

Valley Detail

Ridge and Hip Detail

Vented Ridge Detail (with vent clips and vent material)

Peak Detail

Sidewall Detail

Pipe Penetration Detail

QUALITY ASSURANCE AND EXPERIENCE

1. The contractor shall establish and maintain a complete Quality Control Plan acceptable to the

Government to ensure the requirements of the contract are provided as specified. The

Government shall inspect completed units as a basis for acceptance and payments and provide recommendations to improve work quality while work is in progress. The Contractor is responsible for providing quality control to assure that work complies with requirements of contract specifications.

2. Experience:

• All prospective bidders must provide evidence of past work experience installing standing seam metal roofing along with associated components.

CONDUCT

1. Contractor workers/technicians shall always present themselves in a professional manner.

2. No cursing or inappropriate language shall be used on the jobsite.

3. No smoking in park owned facilities. Smoking area will be designated by the COR.

4. Cigarettes shall be extinguished and placed in approve receptacle for disposal.

5. No drinking or drug use is allowed on the jobsite.

PRE-BID SITE EXAMINATION

1. Site Visit:

• All prospective Bidders, and their Subs, as appropriate are strongly encouraged to visit and examine the existing conditions of the Project prior to submission of Bid in order to better understand the Work, and aid in forming any questions prior to the submission of Bid.

• Any and all discrepancies shall be forwarded to the Contracting Officer in writing for clarification prior to the commencement of Work. Any Work performed prior to said clarification, particularly and including that which may require correction shall be corrected by the Contractor with no additional costs to the Contract and Government and no time extension shall be made to the Contract Schedule. Lack of knowledge of the existing conditions will not be allowed as a basis for extra compensation.

STAGING AND STORAGE

1. Staging:

• There are limited areas for staging on site. The contractor will work with the identified COR to define a “Limits of Work” and “Staging Area”.

2. Storage:

• The contractor will take full responsibility for any tools, equipment and materials stored on site. The park is not responsible for anything stored on site.

PROTECTION AND PREVENTION

1. Park Facilities:

• Protect Park facilities and surrounding area from damage and/or contamination due to construction activities at the jobsite. Contractor shall implement procedures to ensure no damage is caused by workers and/or construction related materials/debris to the ceiling plaster.

2. Housekeeping:

• The Contractor shall:

o Keep the project neat, orderly, and in safe condition at all times.

o Provide enough containers for collecting construction debris and construction materials to be recycled.

o Keep volatile waste in covered containers

DISPOSAL

1. Demolition/Removal:

• All related construction debris generated from the removal or installation process must be collected and disposed of properly in accordance with applicable Federal and State regulations.

SAFETY

1. Accident Prevention Plan:

• After contract award and before the Pre-Construction conference, submit for review an

Accident Prevention Plan.

2. First Aid:

• Always keep an updated first aid kit on site.

3. Personnel Protective Equipment:

• Meet requirements of applicable ANSI standards.

4. Emergency:

• In case of an emergency call 911 and then notify the COR.

SUBMITTALS

1. Submittals:

• The following items shall be submitted a minimum of 10 calendar days prior to the preconstruction conference.

o Construction Schedule o Breakdown of the Schedule of Values o Accident Prevention/Safety Plan o Letter designation Project Superintendent o List of Subcontractors prior to notice to proceed o Product and Materials

WARRANTY

The contractor will provide a two-year on-call basis warranty for all work performed. The contractor will provide a written warranty stating that work executed under this contract will be free from defects of materials and workmanship for a period of two years from date of substantial completion; any equipment breakdown, leaks, electrical issues, etc. will be remedied on written notice at no additional cost to the government. The warranty shall be in writing and shall be signed by the contractor. The warranty shall include the removal and replacement of defective equipment and materials as required at no cost to the government.

The painted finish on the Snap Seam metal roofing shall be a 50-year paint warranty.

PHOTOS