A04_SOW.pdf

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Mount Rainier National Park Facilities Maintenance Division

Statement of Work (SOW)

Replacement of 3-Ply SBS Torch-Applied Roof – Ohana Maintenance Garage (O-208) PMIS Project No.: 323461 Prepared by: Frances Holmgren, Facilities Operations Specialist Date: July 31, 2025

1. Project Description

Furnish all labor, materials, equipment, and supervision to perform a full tear-off and replacement of the existing 3-ply SBS torch-applied roofing system on the 3285 SF roof of Ohana Maintenance Garage (Building O-208). Work includes substrate preparation, membrane installation, perimeter and penetration flashings, site cleanup, testing, and close-out documentation.

2. Location & Access

• Site Address: Located in the southeast corner of the park, Ohanapecosh - 3 miles (4.8 km) north of the park boundary on State Route 123 and 42 miles ( 68 km) east of the Nisqually Entrance

• Roof Area: Approx. 3285 SF, Gable roof with approximately 3/12 roof pitch. There is a 32-inch x 64-inch block chimney penetrating through the roof in addition to plumbing vents. The rooftop is insulated with exception to the overhang creating approximately a 4-inch step around the perimeter on 3 sides, 1 gable side transitions with roof to Block wall flashing on the south slope and an existing metal roof that will require a transition flashing on the north slope. (South slope approximately 35 feet 61 feet, North slope approximately 18 feet x 61feet.

• Access Constraints: May–October work window; steep, narrow roads; materials staged at grade; limited rooftop storage.

3. Scope of Work

A. Mobilization

1. Coordinate site access with MORA Facilities and Safety Officer.

2. Deliver and assemble fall-protection systems, pedestrian barricades, signage, and job staging.

3. Provide site laydown area with weather-protected tarping.

B. Removal & Disposal

1. Tear off existing torch-down membrane, flashings, fasteners, and underlayment down to deck.

2. Haul away all waste off-site; recycle where feasible per NPS waste policies.

C. Deck Inspection & Repair

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1. Inspect roof deck and structural framing, document conditions in report.

2. NPS will perform minor repairs with NPS-provided materials for any rotten or previously damaged framing or wooden roof decking; report any major defects.

D. New Roofing System Installation

1. Install substrate primer and leveling asphalt where required.

2. Torch-apply new 2-ply SBS system (base sheet + cap sheet) per ASTM D6162 Type III.

3. Ensure adhesion continuous; maintain minimum overlap per manufacturer.

E. Perimeter & Penetration Flashings

1. Fabricate and install SBS-compatible flashings at ridge, eaves, parapets, chimneys, vents, and penetrations.

2. Integrate metal terminations and drip edges per code.

F. Underlayment (Optional)

1. Furnish and install air/vapor barrier underlayment in high-moisture zones as directed.

G. Site Cleanup & Close-Out

1. Remove all debris, clean gutters, and inspect roof surface.

2. Perform water-tightness flood test; record and correct any leaks.

3. Provide as-built drawings, warranties, O&M manuals, and final report.

4. Standards & Codes

• ASTM D6162 Type III – SBS Torch-Applied Roofing

• NFPA 101 – Life Safety Code (building envelope integrity)

• IBC 2018 §1507 – Roof Assemblies

• OSHA 29 CFR 1926 – Fall Protection

• NEPA CE A.9 – Routine Maintenance

• EPA RRP – Lead-Safe Work Practices

• NPS Preservation Brief 10 – Least-Aggressive Removal Methods

5. Preservation Requirements

• Structure is non-contributing; removal methods must be reversible and non-destructive.

• Flashing materials to match existing aesthetic; color-matched SBS flashings.

6. Safety Requirements

• Comply with OSHA fall protection, guardrails, personal protective equipment, and NPS safety plan.

• Maintain pedestrian and vehicle exclusion zones at ground level; flag authorized access.

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7. Submittals & Deliverables

• Pre-installation progress meeting minutes.

• Shop drawings for membrane and flashings.

• Weekly progress reports with photos.

• Deck inspection report and repair logs.

• Water-tightness test records.

• As-built drawings, warranties, O&M manuals, and final acceptance letter.

8. Schedule & Sequencing

Please provide the park for approval once awarded.

9. Exclusions

• Structural framing replacement beyond minor patching.

• Roof hatch replacement, interior alterations, new utility penetrations.

• Crane rental (panels < 50 lbs, torch applied by crew).

10. Acceptance Criteria

• No ponding or leaks observed during flood test.

• All flashings weathertight and integrated.

• Submissions complete and approved by COR.

• Final acceptance sign-off by MORA Safety and Facilities.

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