SOW_Replace_Roofs_at_Oregon_Inlet_cg_8_pages.pdf

Replace Roofs on Comfort Stations & Showers, Oregon Inlet Campground Page 1

CAPE HATTERAS NATIONAL SEASHORE

Outer Banks Group

Scope of Work

Replace Roofs on Comfort Stations and Showers at Oregon Inlet

Campground

1.0 INTRODUCTION

The National Park Service (NPS) Cape Hatteras National Seashore (CAHA) has a requirement to replace roofs for three comfort stations and three shower buildings at Oregon Inlet Campground with new structural standing seam metal roofing systems.

2.0 CONSTRUCTION SITE LOCATION

The Oregon Inlet Campground is located at 12001 NC Hwy 12, Nags Head NC 27959.

3.0 BACKGROUND AND EXISTING CONDITIONS

The contractor is required to verify existing conditions.

There are three Comfort Stations and three showers that were constructed circa 1963. The comfort station structures are single story wood frame buildings constructed on timber pile foundations. The roofs are hipped A-frame type with board ceiling/roof deck and cedar shake shingles and 2x10 exposed wooden facia. The roof overhangs the exterior walls measuring approximately 16”. The roof of the building measures approximately 37 ft x 22 ft, Replace Roofs on Comfort Stations & Showers, Oregon Inlet Campground Page 2 approximately 814 sf. Each comfort station has two skylights, one rain diverter over entryway and one wastewater vent in the roof.

The three shower buildings are wood framed structures. The roofs are built with plywood sheathing and cedar shingles overhanging roof. Trim surrounds all four corners of the wall and along the top edge and around each door. The showers consist of 3 individual shower units separated by the interior block walls and a water heater room on the left side rear. The exterior walls measure total length and width of 14 ft x 14 ft with an estimated area of approx. 200 sq ft each. The Roof is a Hip style with 4’ x 4’ a skylight copula at the peak (see figures 3).

4.0 MAJOR WORK COMPONENTS

The contractor will provide all technical support, materials, tools, equipment, and manpower required complete the project.

The major work components are not meant to be an all-inclusive to do list for the project, but a list of the main items involved in the project. The contractor is responsible for verifying existing conditions. The contractor can use this list to assist with the bid process for this project. The major project components are listed below but are not limited to the following:

BASE BID:

A. The Contractor must submit for the government approval all products to be used on this project. Provide at least 21 days for government feedback / approval.

1. Specifically submit the new standing seam roofing system, including manufacturer’s recommendations for high wind application, testing, and installation instructions.

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

Comfort Stations:

B. Demo existing roofing. Included are all items down to the roof deck: shingles, drip edge, rain diverters, felt, vent boots, flashing, and skylights. Skylights are to be removed completely on both comfort stations and – cut existing roof deck board material back to the nearest roof rafter/structural member. Completely remove roofing nails. Remove roof deck materials which are rotten, approximately 160 sf per comfort station. (see figure 01, 02, and 03). Remove existing facia boards around each comfort station, approximately 354 LF.

C. Protect exposed roofs during demolition until new roof materials are applied.

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(Figure 01 Example of wood shingled roof with skylight, and rain diverter)

(Figure 02 Example of septic vent with boot and shower copula with vent)

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(Figure 03 Example of interior of Comfort Station looking up to skylight)

D. Provide new 0.40 Aluminum mechanically seamed double lock style structural standing seam metal roofing. New roof shall have the following features:

1. Concealed galvalume or stainless steel fasteners. No fasteners shall be installed through the roof deck to be visible from inside the comfort station.

Fasteners may be visible through the roof deck in the showers.

2. Completely cover the roof deck.

3. Provide new roof vent boot from the same manufacturer as the new roof.

4. Provide rubber membrane underlayment on the entire roof deck,

5. At the skylight openings, provide new tongue and groove boards to cover the opening. New boards shall match the angle of the existing boards and be fastened with type 316 stainless steel fasteners to the existing rafters. New roof deck boards shall match the existing thickness of the existing adjacent roof deck boards. New deck boards shall extend to a rafter or other structural roof framing member to provide the same structural support as the rest of the roof deck.

6. Carpentry/Roofing/Framing work necessary to provide a new standing seam metal roof in place of the existing roof is included in this project.

7. New roof system must meet International Building Code/North Carolina Building Code for the wind rating of 120 mph at the project site. New Roofing must meet ASTM E1514 for Standing Seam Metal Roof Systems or approved equal (Standard Specification for Structural Standing Seam Steel Roof Panel Systems (astm.org)).

8. New roof must be installed by a qualified roofing installed who has specific knowledge and experience installing the roof system for this project. Installer must have a certification from a metal roofing association, or an equivalent manufacturer’s training and experience program.

9. New roof installation methods shall meet the requirements of the manufacturer to obtain a 30-year material warranty, 20-year weather tightness https://www.astm.org/e1514-98r17e01.html

Replace Roofs on Comfort Stations & Showers, Oregon Inlet Campground Page 5 warranty, 120 mph wind warranty (with no exclusions for named storms or gusts), 20-year fade and chalk resistance warranty.

10. Color shall be a hunter green shade as selected by the COR.

11. Provide rain diverter above main entrance to the comfort stations. Rain diverters shall be installed per manufacturer’s instructions and be fabricated by the same manufacturer as the standing seam roof panels

12. Plumbing vents shall include new rubber boots from the same manufacturer as the roofing system

13. 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 shall ensure the projects roof is 100% watertight at the completion of work each day.

E. Provide new 2x10 pressure treated wood facia boards. Utilize a minimum of four fasteners at each rafter plus 2 fasteners. Pitch cut the top of the facia board to match the slope of the rafters and roof deck.

Showers - Elements of the project will include:

F. Demo existing roofing. Included are the shingles, drip edge, felt, vent boots, and skylights and plywood roof deck, approximately 200 sf per shower building.

Skylights are to be removed completely. Remove the vertical soffit vent materials on the shower buildings, approx. 48 SF. Remove existing hurricane rafter to wall ties in the showers, +/- 16 per building. (See figure 04 ,05, and 06). Remove existing facia boards around each shower building, approximately 168 LF.

G. Provide new ¾ inch thick plywood roof decking minimum grade C for each shower building, approximately 200 sf per shower building. New plywood shall extend to the edge of the rafter overhangs.

H. Provide new 0.40 Aluminum mechanically seamed double lock style structural standing seam metal roofing for the shower buildings. New roof shall have the following features:

1. Concealed galvalume or stainless steel fasteners. No fasteners shall be installed through the roof deck to be visible from inside the comfort station.

Fasteners may be visible through the roof deck in the showers.

2. Completely cover the roof deck.

3. Provide new roof vent boot from the same manufacturer as the new roof.

4. At the skylight openings, provide new tongue and groove boards to cover the opening. New boards shall match the angle of the existing boards and be fastened with type 316 stainless steel fasteners to the existing rafters. New roof deck boards shall match the existing thickness of the existing adjacent roof deck boards. New deck boards shall extend to a rafter or other structural roof framing member to provide the same structural support as the rest of the roof deck.

5. Carpentry/Roofing/Framing work necessary to provide a new standing seam metal roof in place of the existing roof is included in this project.

6. New roof system must meet International Building Code/North Carolina Building Code for the wind rating of 120 mph at the project site. New

Replace Roofs on Comfort Stations & Showers, Oregon Inlet Campground Page 6

Roofing must meet ASTM E1514 for Standing Seam Metal Roof Systems or approved equal (Standard Specification for Structural Standing Seam Steel Roof Panel Systems (astm.org)).

7. New roof must be installed by a qualified roofing installed who has specific knowledge and experience installing the roof system for this project. Installer must have a certification from a metal roofing association, or an equivalent manufacturer’s training and experience program.

8. New roof installation methods shall meet the requirements of the manufacturer to obtain a 30-year material warranty, 20-year weather tightness warranty, 120 mph wind warranty (with no exclusions for named storms or gusts), 20-year fade and chalk resistance warranty.

9. Color shall be a hunter green shade as selected by the COR.

10. Plumbing vents shall include new rubber boots from the same manufacturer as the roofing system

11. 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 shall ensure the projects roof is 100% watertight at the completion of work each day.

I. Provide new 2x8 pressure treated wood facia boards. Utilize a minimum of four fasteners at each rafter plus 2 fasteners. Pitch cut the top of the facia board to match the slope of the rafters and roof deck.

(Figure 04: Shower building Skylight, Copula with vent and drain vent)

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(Figure 05 Interior of shower building looking up towards skylight)

(Figure 06 Interior of shower building looking up towards skylight)

NOTES:

1. All carpentry work required to install the new roof system is included in this project.

2. Electrical work associated with disconnection and reconnection of the photocell is included.

3. Stainless Steel hardware must be type 316 stainless steel unless otherwise approved by the NPS.

4. The NPS follows the International Building Code (IBC). This project must meet the

IBC, and all federal, state, and local codes.

5. During construction at least one shower building and one comfort station shall be kept open for public for use.

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(Figure 07 North Carolina Wind Zone diagram from Building Code showing Oregon Inlet Campground within the 120 mph wind zone)

5.0 SUBMITTALS

A. Product Data. The Contractor shall submit written documentation or color/product samples for materials identified in the Scope of Work.

1. Structural Standing Seam Roof System including fasteners.

2. Color Selection Sheet for Structural Standing Seam Roof

3. Hurricane Ties

4. Wood products

5. Rubber Boot material

B. Manufacturer requirements for Installer Qualifications C. All manufacturer operation and maintenance manuals, warranties, and cleaning instructions shall be submitted before final payment is made.