A04_ATTACHMENT_1_-_SOW.pdf

1 | P a g e Replace Roofs on Q326, Q390, Q391

CAPE HATTERAS NATIONAL SEASHORE

North Carolina

STATEMENT OF WORK:

NATIONAL PARK SERVICE

Region II

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1.0 BACKGROUND AND EXISTING CONDITIONS:

The housing units in this project which require new roofs include Quarters 326 (Q326), Quarters 390 (Q390), and Quarters 391 (Q391).

Q326 is an asphalt shingle roof with plywood decking measuring approximately 2,100 sf. The roof consists of the main house area, a garage, and a bedroom addition. Penetrations through the roof include several roof vents for septic and electrical service. Soffit vents and gable end vents provide attic ventilation.

Q390 is an asphalt shingle roof with plywood decking measuring approximately 2,100 sf. The roof consists of a main house area and a garage. Several penetrations in the roof provide attic ventilation, septic vents, and electrical service. Soffits beneath the eave overhangs are plywood with strip vents.

Q391 is an asphalt shingle roof with plywood decking measuring approximately 2,100 sf. The roof consists of a main house area and a garage. Several penetrations in the roof provide attic ventilation, septic vents, and electrical service. Soffits beneath the eave overhangs are plywood with strip vents.

Each of the houses consists of more than one roofline, where garages or building additions are lower than the main building roof ridges. Some portions of the houses have board roof decks. Existing roof decks include ½ inch, 5/8 inch, ¾ boards (1x8 or 1x8). Repairs to each of the houses’ shingles and plywood decking have been made in recent years. The rafters/truss members have minor damage from water leaks.

Minimal rot is expected around roof penetrations, eaves, fascia, and rafter ends.

Figure 1: Aerial View of the Vicinity of the Three houses.

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Figure 2: Q326 Front View

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Figure 3: Q326 Back View

Figure 4: Q390 Front View

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Figure 5: Q391 Front View

2.0 PLACE OF PERFORMANCE:

The street address for Q326 is 46214 Loggerhead Lane Buxton, NC 27920.

The street address for Q390 is 46246 Loggerhead Lane, Buxton, NC 27920.

The street address for Q390 is 46246 Loggerhead Lane, Buxton, NC 27920.

3.0 TASKS/SPECIFICATIONS:

Replace Asphalt Shingle Roof at three housing units Q326, Q390, and Q391 with new Asphalt Shingle Roof. Work must follow the attached Specification Section 07 31 13.01 10 High Wind Asphalt Shingle Roofing.

BASE BID:

3.1 Demolish and dispose of approximately 4,200 sq ft of existing roof systems down to existing roof decks to include satellite dishes and posts, nails, attic vent boots/penetration boots, and attic vents (approximately 2,100 sf each roof).

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3.1.1 Throughout the demolition and construction period, use tarps or other materials to catch roofing debris at ground level. Do not allow nails, shingles, or other demolition debris to spread around the yard, property, driveway, etc. Walk daily with high powered magnet, visual inspection, and other appropriate tools to remove debris from the ground level.

Document in the daily reports the cleaning of the ground level site.

3.1.2 Provide fence or other barrier at ground level to alert residents and staff of areas where debris may fall from the roof to the ground. Maintain the barriers during the demolition and construction period so that barriers are visible, sturdy, and straight.

3.1.3 Remove nails or staples which have rusted in place and broken off. Coordinate an on site inspection with the Contracting Officer Representative (COR) of roof deck after demolition to display smooth roof deck finish without old nails or staples sticking up which could poke holes in new roof materials. Contractor shall run board or broom over roof deck to find stray old nails/staples and show smoothness of roof deck.

3.2 Repair roof deck, 1,440 sf of rotten, damaged, roof ventilation penetrations.

3.2.1 Roof deck repairs requiring new plywood shall be at least 2 ft x 4 ft to fasten into at least 3 rafters.

3.2.2 Cut existing roof deck at air vent openings back to nearest truss/rafter, at least 2 ft x 4 ft.

Ensure straight cut lines that do not penetrate or cut the truss rafters.

3.2.3 Install new plywood in roof deck opening matching the thickness of the existing roof deck. Ensure a snug fit with adjacent roof deck. Fasten existing deck and new plywood at the repair. Cut opening in the roof deck to match the size of the opening for the new roof vent installed.

3.2.4 Remove rotten or damaged roof deck and replace with new plywood decking of same thickness (depending on plywood or boards). At locations of rotten or damaged wood, cut the roof deck to remove damaged areas back to the nearest truss rafter or replace entire sheet. Ensure cuts to remove old deck are straight and do not penetrate or cut the truss rafters. Replace the removed wood with new plywood or boards matching adjacent wood deck. Ensure new plywood has straight cut lines that fit in the removed area with gaps no larger than ¼ inch. Fasten existing deck and new plywood at the repair. Fasten new plywood only into solid (non-rotten) rafter wood.

3.3 Install new asphalt shingle roof system. New roof system must meet the attached high wind specification and be rated for 150 mph or greater. Roof system components shall be from the same manufacturer or as required by the manufacturer.

3.3.1 Install new Roof system according to approved products. New roof system must meet the attached high wind specification and be rated as 150 mph.

3.3.1.1 Color of new shingles will be selected by the CO. Submit the manufacturer’s available colors for approval.

3.3.1.2 Include drip edge. Corner pieces shall be continuous and cut to bend around the corner for at least 12 inches on both sides of the corner.

3.3.1.3 Cover entire roof with self-adhering membrane on top of the roof deck recommended by the roofing system manufacturer.

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3.3.1.4 Install new rubber boots for pipe vents sized to fit existing pipes and seal with no leaks.

3.3.1.5 Install new architectural asphalt shingles which meet or exceed a 150 mph wind rating. Installation must follow the manufacturer’s instructions and specifications and Building Code installation requirements for the location.

3.3.1.6 On each eave and rake, install a starter row of shingles or manufacturer specific starter strip material. Starter row shall be at least ¼” – ¾” past the eave of the roof edge unless otherwise specified by the manufacturer.

3.3.1.7 Install rain diverter above each doorway. Rain Diverters shall be compliant with the new roof system, at least 1 ft wider each side of the door opening, and acceptable for installation causing no void in warranty.

3.3.1.8 Plumbing vents shall include new rubber boots from the same manufacturer as the roofing system. New boots must fit snug around vent pipes and be secured to roof per manufacturer’s instructions. Electrical penetration boots may include split boots made for sealing around electrical masts. Flash and seal per manufacturer’s instructions.

3.3.2 Carpentry/Roofing/Framing/etc. work necessary to provide a complete and useable roofing system in place of the existing roof is included in this project.

3.3.3 Follow FEMA Technical Bulletins and Advisories notices for high wind and flood hazard areas.

3.3.4 New roof system must meet International Building Code/North Carolina Building Code for the wind rating at the project site.

3.3.5 Colors will be selected by the COR. Submit the manufacturer’s available colors for each product for approval.

3.4 Temporary roofing shall maintain the project roof as watertight and able to prevent leaks and damage to the building and structure until reroofing work is completed. Contractor is to make sure that at the completion of work each day the projects roof is 100% watertight.

3.5 National Park Service (NPS) requires the existing roof decks to be walked after demolition has been completed with their onsite Contracting Officer Representative (COR) prior to installation of any new roof materials to ascertain if any water penetration has caused deterioration and corrosion of the existing decks which are to remain.

OPTION 1

3.6 Replace the roof on Q326 per the tasks listed in the Base Bid, approximately 2,100 sf.

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OPTION 2

1.1 Replace Fascia boards

1.1.1.1 Remove rotten and broken existing fascia boards on eaves and rakes up to 100

LF. Replaced with new pine boards, primed and painted. New fascia shall be 1x6 material, #2 grade pine fastened to each roof rafter with minimum 2 fasteners per rafter. Prime and paint all 6 sides of the new fascia boards prior to installation. Use exterior latex grade primer and 2 coats of flat sheen mildew resistant latex paint. Exact color will be selected by the CO. Pre-painted wood boards are a suitable substitute for raw wood painted on site. Submit pre-painted wood for color match and exterior usage.

1.1.2 Inspect existing rafter tails at locations where fascia is removed. Replace rotten rafter tails with new, up to 36 LF. Acceptable replacement details are as follows:

1.1.2.1 At locations where rot does not extend to the wall top plate: Cut and replace rafter tail with new. Cut rafter tail in increments until at least 1 inch past rotten wood shows solid wood. Install new rafter tail of 2x4 or 2x6 material to match the removed portion. Scab on one side of the new rafter overlapping at least 1 ft past the cut line. Screw the scabbed piece of 2x4 with minimum 4 screws each side of the cut.

1.1.2.2 At locations where rot extends past the building wall top plate: Notify COR to inspect the rafter connection. Cut and replace with new rafter tail which is notched with the same birdsmouth cut as the original removed rafter.

Replacement section shall be the same nominal dimensions as the removed portion. Sandwich new rafter and overlap the new rafter and existing remaining rafter section by 1 ft each side of the cut.

1.1.2.3 At locations where a rotten rafter end is encountered with a hurricane tie/rafter to wall top plate strap is encountered, notify the COR. Cut out the old rafter and cut or remove the nails leaving the rafter tie in place. Set new replacement rafter accordingly and re-nail the tie. Simpson E5 Rafter/Truss-to-Top Plate may be used to tie new scabbed pieces together. Add blocking to secure rafters in place, approx 36 linear feet.

OPTION 3

1.2 Soffits. Remove existing soffit and soffit vents around the eaves/overhangs of each house, approx 450 ft x 1.5 ft. Replace with new soffit plywood material and perforated soffit vent strip. Recoat soffit with 1 coat of exterior latex primer and 2 coats of mildew resistant exterior latex paint. Color will be selected by the Contracting Officer. Pre-coated or synthetic material for the soffit may be submitted as a suitable substitute. The material must have equal durability and properties as plywood and be suitable for this application.

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2.0 DELIVERY:

2.1 Deliver roofing materials to the project site in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, approval or listing agency markings, and directions for storing and mixing with other components.

2.2 Delivery of materials to the park will be brought in when needed. Items stored outside will be done at the Contractor’s own risk. Use and storage of a work trailer can be coordinated with the

COR.

2.3 Materials must be stored on site according to Manufacturer’s recommendations and requirements.

Damaged or improperly stored materials must be replaced at the Contractor’s expense.

3.0 GOVERNMENT-FURNISHED EQUIPMENT:

3.1 No Government equipment will be provided. Water from available hose bibs on houses and exterior electrical outlets on houses may be used during the project by the Contractor as needed.

Back flow prevention and over current devices must be provided by the Contractor and utilized according to municipal codes and manufacturer’s instructions.

4.0 OTHER UNIQUE REQUIREMENTS:

4.1 This site is part of the Cape Hatteras National Seashore. Therefore, additional care must be taken while working around visitor areas or housing residences. No obscene language on clothing will be allowed. Appropriate clothing and shoe wear must be worn inside of the park’s areas. No smoking or tobacco products in or around the buildings (within 50 feet of buildings or entrances).

The COR will show the crew members where the established smoking areas are located. No inside lunch areas are available. Clean-up will be accomplished 45 minutes prior to schedule closing time. No trash or debris will remain in the work site overnight. Dumpster and recycling are the sole responsibility of the contractor. Contractor’s vehicles will be parked be at the discretion and coordination of the COR to prevent impact on the visiting public.

4.2 Work site is in a government housing area. Parking will be designated for contractor personnel.

Dumpster location will be designated by CO based on available locations.

4.3 During the demolition and construction phases of the project, work will be done to prevent the greatest impact on the housing residents. Areas that need to be closed will be coordinated with the COR.

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4.4 The contractor is responsible to repair all damage caused by their personnel or equipment.

Property and grounds must be brought back to original or better condition.

5.0 QUALITY ASSURANCE:

5.1 Quality Assurance will be completed through inspections by the Contracting Officer Representative and Subject Matter Experts. Manufacturer’s instruction, Building Code Requirements, and Industry Standards such as National Roofing Contractors Association standards will be utilized to assure quality of workmanship.

5.2 The contractor shall maintain a qualified crew of roofers throughout the duration of the project and ensure quality control. Only qualified journeypersons shall be engaged in roofing work.

Apprentices may be used provided they work under the direct supervision of a qualified journeyperson. A qualified crew will consist of the project manager, journeymen and apprentices.

6.0 SUBMITTALS:

Submittals shall be submitted to the CO and approved prior to contract award.

6.1 Work schedule -- delineating the various stages of work by phase (milestones). At a minimum include: Demolition for each house, new installation of each house, expected completion date for each house.

6.2 The following submittals shall be required prior to the pre-construction conference in addition to administrative submittals required per the contract documents:

6.2.1 Product Submittals: All products to be used on this project. Specifically:

6.2.1.1 Paint Primer

6.2.1.2 Paint Top Coat

6.2.1.3 Asphalt Roof shingles

6.2.1.4 Self Adhering membrane underlayment

6.2.1.5 Roof Decking

6.2.1.6 Roof Fasteners

6.2.1.7 Roof vents

6.2.1.8 Soffit vent

6.3 The following submittals will-be required after work is complete and before final invoicing:

6.3.1 Warranties and Product Guarantees showing 150 mph wind rating.

6.3.2 Manufacturers recommended care and maintenance requirements.

7.0 BARRIERS & RESOURCE PROTECTION MEASURES:

7.1 Protect all exterior/interior surfaces of the building and adjacent landscaping, walks, drives, walls, signage, all adjacent buildings, and Government equipment from damage by project operations.

Use drop cloths, shields, masking, templates, or other suitable protective means. Protect glass

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7.2 Erect temporary construction barriers to protect visitors, employees and restrict pedestrian access.

The contractor shall work with the CO/COR to avoid or minimize interruptions to general visitor access. Minimum is OSHA standards.