A04 0040512620 20201208 Salt Pond Statement of Work.pdf

STATEMENT OF WORK

Lobby Roof Replacement: Salt Pond Visitor Center

CAPE COD NATIONAL SEASHORE

50 Nauset Road, Eastham, MA

September 25, 2020

Scope This project is to remove and replace the roof of the lobby of the Salt Pond Visitor Center.

The contractor shall minimize disturbance to the site to the greatest extent possible unless directed otherwise.

The contractor shall provide all labor, materials, tools, and equipment required to complete this work.

All work performed under this contract shall be done in accordance with applicable local, State, and Federal codes, bylaws and ordinances in effect at the time of this work.

Work shall include the following:

Remove existing cedar roofing and replace with Red Cedar shakes.

Replace any deteriorated wood roof decking encountered with like material. Assume 5% replacement.

Install neoprene roof boots at all penetrations of the roof.

Provide and install one layer of self-adhered roofing underlayment to entire roof deck directly on bare wood substrate, per manufacturers’ requirements.

Provide and install one layer of rain screen ventilated underlayment to entire roof deck, per manufacturers’ requirements.

Install cedar shakes (not ridge boards) at ridges, pattern to match existing.

Replace existing copper flashing and drip edge at all locations.

Replace cedar trim boards at eave and at top.

Copper monitor at top of roof is not part of this contract.

Measurements Estimated dimensions and quantities are provided as a guide only. The contractor is responsible for verifying all measurements and dimensions. The contractor shall take all measurements for quantities of materials and note existing conditions for the installation of new work. All ancillary work, cutting and /or removal of existing work necessary for the installation of new work shall be done as required as part of this contract.

Site Examination It is the responsibility of the contractor to examine the work site to confirm existing conditions and required quantities prior to submitting a proposal on this project. The contractor may arrange a site visit by contacting the Contracting Officer’s Representative (COR) between 8:00 a.m. and 4:00 p.m. on non-holiday weekdays. Telephone 508-957-0709. Email: john_defoe@nps.gov.

Utilities and Services The contractor shall provide and maintain sanitary facilities for workers.

The contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government. Notify Contracting Officer and utility companies of proposed locations and times for excavation. If damage occurs to an unknown utility, repair utility and immediately notify Contracting Officer.

Water Service: Water from existing water system is normally available for use without metering and without payment of use charges. Provide connections and extensions of services as required for construction operations without any additional permit costs. If water is not available, the contractor shall provide temporary potable water at no additional cost to the contract for project use.

Electric Power Service: Electric power from existing system is normally available for use during construction without metering and without payment of use charges. Provide connections and extensions of services as required for construction operations without any additional permit costs.

Arrange with utility company and government for time when service can be interrupted, if necessary, to make connections for temporary services. If electric power is not available, the contractor shall provide temporary power at no additional cost to the contract for project use.

Permits and Approvals The contractor is responsible for contacting Dig Safe (#811) or other approved utility marking entity for pre-marking of all underground utility locations within project area prior to any ground disturbance.

Prior to commencement of any on-site work, provide Contracting Officer with copies of proof of pre-marking from utility marking entity.

The contractor shall obtain all required permits for the performance of the work specified in Contract Documents at no additional cost to the contract.

Submittals and Deliverables The contractor shall submit safety plan that complies with OSHA standards within 3 business days after award.

The contractor shall submit a traffic safety management plan that addresses public and contractor parking, vehicular circulation, pedestrian circulation, laydown, moving of materials and equipment within 3 business days after award.

The contractor shall submit an environmental protection plan that addresses protection of existing landscape elements, including lawn areas, trees and shrubs within 3 business days after award.

The contractor shall propose location of laydown and stockpile area for NPS approval. Laydown and stockpile shall be confined to any existing paved areas only.

Perform the work of this contract.

Safety and Environmental Protection Requirement Maintain project area in a neat, orderly and safe condition at all times. All work areas shall be made secure and safe after hours, on weekends and holidays.

All debris and removed material is the property of the contractor and shall be recycled or legally disposed of in a manner that is consistent with local and state regulations. All waste, trash and debris generated as part of this project must be secured from wind and rodent action.

The contractor shall take all necessary precautions to prevent fire during construction. The contractor shall provide and maintain suitable fire protection equipment. Protection Equipment Required: Furnish a minimum of one UL Class 2A, 2-1/2 gallon water type stored pressure extinguisher, and one UL Class 10, Type I, 15 pound A:B:C carbon dioxide extinguisher at each work site.

No radios or smoking (including vaping) will be allowed on the job site.

This is a hard-hat project. Hard hats are required to be worn at all times. Confined space entry, fall protection and hardhat use will conform to safety rules and regulations.

The contractor is responsible for securing the site and the work of the contract. During the execution of this contract, the contractor shall conform to the rules and regulations as set forth by OSHA Safety and Health Standards. The contractor shall provide barriers, temporary fencing, signage, etc. wherever work could cause injury to workers or visitors, and ensure that ladders, scaffolding and equipment are secured from public access during off-hours.

The contractor’s representative shall have an updated First Aid card. Fall protection plan shall be posted or made available prior to start of elevated work or any other time it is required. Fall protection must be used at all times when above six feet. Only OSHA approved ladders and scaffolding permitted on site and must be properly used. Temporary handrails for stairways and balconies must be installed to OSHA requirements.

The contractor shall provide and maintain environmental protection during the life of the Contract to control pollution or to correct conditions that develop during construction.

Equipment shall not be allowed to operate outside the limits of work or to disturb existing vegetation.

Construction equipment shall be kept in good repair, without leaks of hydraulic or lubricating fluids.

The contractor must visually inspect all equipment prior to commencing work every day and at the mid-point in the workday for leaks. If such leaks or drips do occur, they shall be cleaned up immediately.

Confine equipment maintenance to one location. Control runoff in this area to prevent contamination of soils and water. No equipment repair will be allowed on the site.

It is the contractor’s responsibility to ensure that any disturbance or damage done during the course of this project to the existing utilities, landscape, building or government materials, shall be repaired or restored to its original condition by the contractor at the contractor’s expense prior to completion of the job.

Work and Weather Limitations Regular work hours are between 7AM to 4PM Monday through Friday. Unless otherwise requested and approved in advance, no work shall take place after hours, on holidays or weekends. Requests must be made 48 hours in advance.

The contractor shall be responsible for storage of all materials and equipment; the Park must approve the contractor’s use of any space on the site in advance.

Proceed with project only when existing and forecasted weather conditions will permit work to be performed according to manufacturers' recommendations and warranty requirements. Ensure temperatures are over the minimum installation temperatures recommended by material manufacturers.

Security The contractor shall have unescorted access to the construction site. The contractor shall coordinate with the COR for access to all locations.

The COR or the COR’s alternate will not be required to be at the site location during all working hours.

Regulations

• Occupational Safety and Health Administration (OSHA)

• National Institute for Occupational Safety and Health (NIOSH)

• Massachusetts General Laws and Department of Environmental Protection regulations and statutes

• Town Board of Health Regulations

Materials The contractor shall furnish, supply, and install all necessary materials to successfully complete the project requirements. Unless explicitly indicated, new materials shall match those being replaced.

Self-adhered roofing underlayment Membrane composed of two waterproofing materials—a rubberized asphalt adhesive backed by a layer of slip resistant coated high density cross laminated polyethylene film that has the following characteristics:

40 mil (1.02 mm) thick per ASTM D3767 method A, a membrane tensile strength of 250 psi (1720 kN/m2) per ASTM D412 (Die C modified);

membrane elongation of 250% per ASTM D412 (Die C modified);

low temperature flexibility to at least -20°F (-29°C) per ASTM D1970;

adhesion to plywood of 3.0 lbs/in. width (525 N/m) per ASTM D903;

maximum permeance of 0.05 Perms (2.9 ng/m2s Pa) per ASTM E96;

a maximum installed material weight of 0.3 lb/ft2 (1.3 kg/m2) per ASTM D461.

Self-adhered roofing underlayment shall meet the following standards:

ICC ESR-1677 approval according to C-48 Acceptance Criteria for Self-Adhered Underlayments used as Ice Barriers Underwriters Laboratories Inc. Classified Sheathing Material Fire Resistance Classification with Roof Designs: P225, P227, P230, P237, P259, P508, P510, P512, P514, P701, P711, P717, P722, P723, P732, P734, P736, P742, P803, P814, P818, P824 Underwriters Laboratories Inc. Class A fire classification under fiber-glass shingles and Class C under organic felt shingles (per ASTM E108/UL 790) CCMC Approval No. 13670-L

As an advisory to the contract, Grace Ice and Water Shield meets the above-listed criteria.

Rain Screen Black nylon ventilated underlayment three-dimensional open mesh with a thickness of 0.277 inches (7.04 mm), weight of 9.7 lbs/roll and a fire Rating of A. As an advisory to this contract, Benjamin Obdyke Cedar Breather meets the above listed criteria.

Roof sheathing Pressure treated exterior grade plywood, thickness to match existing.

Roof Penetrations Neoprene rubber roof boots shall be standard to the industry, sized correctly for the roof penetration.

Trim Trim board materials shall be STK grade red cedar, sizes and profiles to match existing, approximately 7/8” thickness.

Roof material:

Red cedar shakes manufactured by members of the Cedar Shake & Shingle Bureau graded in accordance with UBC Standards No. 15-3 and/or CSA 0118.1, split face and sawn back, 18” x ¾” minimum, Premium Grade All Clear, no defects, Heartwood 100% edge grain random widths, minimum width shall be 4", Thickness shall be nominal with a minus tolerance of 1/16" in 10% of the bundle.

Roof Exposure: match existing.

Starter-finish Course: Length 15”. For use on the underlying starter course at eave lines and for the final course at ridges where trimming would otherwise be necessary and full-length shakes are not needed.

Wood Finishes All wood materials shall be untreated and unfinished.

Caulking for where water invasion may occur shall be Benjamin Moore Elastomeric 465 01 Caulk, or an approved equivalent.

Fasteners Fasteners shall be of a length sufficient to penetrate into the sheathing at least ¾”, stainless steel type 316 ring shank blunt tip nail with minimum 7/32" head. No other fastener material will be considered.

Likely length of fastener: between 1 ½” and 2” long.

No use of staples will be allowed.

Asphalt Roofing Cement: ASTM D 4586, Type I or II.

Flashing Copper flashing shall match existing in all salient characteristics. Match existing drip edge flashings at eaves and rakes in material, exposure, dimension, and configuration.

Lead-coated copper shall be 16 oz. and 20 oz. cold rolled sheet copper conforming to ASTM B-101-12 Type I, Class A Specifications. Lead coating shall be applied by hot dip process at 6 to 7.5 pounds per 100 square feet. Plan copper shall conform to ASTM B-370-12.

Plain red copper shall be cold rolled sheet copper conforming to ASTM B370-09, 20 oz. as required.

Sheet length shall be 8’ maximum.

Rivets shall be 3/16’’ diameter copper.

All accessories, including but not limited to nails, screws and clips shall be copper, brass, stainless steel or galvanized steel to match and be completely compatible with the surrounding metal to prevent galvanic reaction.

Solder shall conform to ASTM B32. Solder for lead coated copper shall be 60% block tin and 40% pig lead conforming to ASTM Specifications B32, Grade SN60.

Flux for copper shall conform to ASTM B32, Type IS.

Workmanship The contractor is responsible for appropriate quality control and workmanship shall be the best of their respective kinds and in full accordance with applicable codes.

Make sure all work is flush, square, level and has proper reveals per manufacturer’s specs. If not sure ask COR before starting.

Ensure that all work is free from dirt, damage or defects. Pick up excess materials within 2 days of job completion. Do not use windows for access or to pull cords, hoses or siding materials though. Do not cut through trim or siding while on the building to avoid damaging the underlayment. Do not nail cleats or wood blocks onto or in finished siding products.

When a manufacturer or a standard uses subjective words, e.g., “should, could, may”, etc., these words shall mean “shall, will, required”, etc. When the word “recommended” is used, it shall mean “required”. If there is a conflict between general and specific provisions, the specific shall govern.

Upon Notice to Proceed, the contractor shall make steady and uninterrupted progress toward the completion of the work of this contract.

Demolition Before beginning any demolition or deconstruction work, survey and examine the site to determine the extent of the work. Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain property of Government.

Waste Disposal Facilities: Provide waste-collection containers in sizes adequate to handle waste from construction operations. Comply with requirements of agency(ies) with jurisdiction.

Disposal of removed materials shall be the contractor's responsibility. All debris and removed material is the property of the contractor and shall be recycled or legally disposed of in a manner that is consistent with and complies with local and state regulations.

Remove existing materials, including underlayment. Re-secure any substrate nails that have backed out and any remaining nail fragments prior to installation of new materials.

Installation All work shall be done in conformance with the Secretary of the Interior Standards for the Treatment of Historic Properties.

Follow the installation procedures described in the Cedar Shake & Shingle Bureau Wall Manual unless otherwise indicated herein.

Store materials so they remain clean and dry.

Roofing Remove existing roof. Replace damaged or deteriorated wood decking encountered with like material.

Any replaced member must span a minimum of three support members (rafters), unless decking material is tongue & groove- exposed from the underside, in which case the deteriorated member must span at least one truss width.

Install flashing, roof boots and drip edge. Form flashing to profiles to match that which was removed and to protect roofing materials from physical damage and shed water. Form sections square and accurate to profile, in maximum possible lengths, free from distortion or defects detrimental to appearance or performance. Weather-lap joints minimum 2 inches. Seal work projecting through or mounted on roof with asphalt roofing cement and make weather tight. Verify that roof penetrations and plumbing stacks are in place and flashed to deck surfaces. Drip edge shall be installed around entire perimeter of roof.

All new flashing shall replicate the character and details of the existing flashing. Furnish and install lead coated copper flashings where lead coated flashings were removed.

Sheet metal flashings shall be as required to match the existing sheet metal systems. Refer to the publication, "Copper and Common Sense" by Revere Copper and Brass and all recommendations of the Sheet Metal and Air Conditioning Contractors National Association concerning methods and materials to be used in the fabrication and construction of sheet metal flashings.

Form and fabricate sheets, seams, strips, cleats, edge treatments, integral flashings, and other components of copper to profiles, patterns, and drainage arrangements shown and as required for permanently leak-proof construction.

It is the intent of this project to have as little soldering of copper as is practical in order to properly install strong, watertight metal flashings. Joints shall be interlocked and crimped where possible. Flanges which extend onto the roof surface shall always be soldered. All corners shall be soldered to provide strength and a waterproof connection.

Comply with Military Specification MIL-S-6872B entitled, "General Specifications for Soldering Process" when forming soldered joints. Use conduction soldering methods. Areas to be joined shall be cleaned of all oil, grease, pencil marks, paint, dirt or other foreign substances. Remove all burrs using files, grinding stones or other methods. Hold parts in place using clamps, jigs and supports or by self-fixturing. If parts are tack-soldered to hold them in place, the area of tack-soldering shall be reworked into the final soldering. Parts cannot move during the soldering process.

Flux shall be applied to all surfaces that are to receive solder. Flux-cored solder should not be used. Flux shall be fluid when heated and effective in removing and excluding oxides and other impurities from the joint. Flux should be readily displaced by the molten solder.

Areas to be joined shall be heated above the liquidus temperature of the solder. To deliver maximum heat, the solder shall be applied to the joint and not the bit of the iron. Allow solder to flow in place to provide a minimum 1" final width of solder over the joint. Joint shall not be disturbed until it has been completely cooled. After soldering completely, remove all flux and acid by washing and scrubbing with a neutralizing agent.

Edges of all sheets of uncoated copper to be soldered shall be tinned with solder on both sides for width not less than 1 ½ “. All soldering shall be done slowly with well-heated coppers; heat sheet thoroughly and sweat copper completely through the full width of the seam. Ample solder shall be used and seam shall show at least one full inch of evenly flowed solder. Wherever possible all soldering shall be done in flat position.

Install self-adhered roofing underlayment according to manufacturer’s directions.

Tack down Rain screen. One tack (or nail) approximately every 3 square feet is adequate. Install with dimples down to present the flat side as the nailing surface. Do not lap layers of Rain screen. Each course should butt against previous course. Work from fascia to ridge just ahead of shake and felt installation to avoid walking directly on Rain screen (may be slippery, especially when wet). Allow 1/4" for Rain screen thickness.

Install roofing. Shakes must be doubled at all eaves. Butts of first course shakes shall project 1 1/2" beyond the fascia and approximately 1" over the gable or rake end. Spacing between adjacent shake (joints) should be a minimum of 1/4" and a maximum of 3/8". Shakes shall be laid with a side lap not less than 1 1/2" between joints in adjacent courses, and not more than 10% shall be in direct alignment in alternate courses.

Each shake or shingle shall be applied with two nails. Nails shall be applied approximately 3/4" from the edge and approximately 1 1/2" above the exposure line. Nails shall be long enough to penetrate into the sheathing at least 3/4" or all the way through. Nails must be driven flush with the surface of the shake or shingle. Overdriven nails will be rejected and require replacement of the shake or shingle.

Install soffit, fascia and trim materials with stainless steel ring shank nails intended for the purpose.

Replace any deteriorated soffit, fascia and trim.

Caulking All joints where water invasion may occur are to be filled with Benjamin Moore Elastomeric 465 01 Caulk, or an approved equivalent, not to be applied until primer coating is applied and allowed to dry a minimum of 24 hours.

Storage of Equipment and Materials The contractor shall be responsible for storage of all materials and equipment; the Park COR and / or Project Inspector must approve the contractor’s use of any space on the site in advance.

Upon completion of the work of this contract, the storage area shall be left broom clean by the contractor.

Clean-Up After completion of the work, construction debris, excess material and equipment shall be removed from the site and legally disposed. The contractor shall rake the grounds and use a magnet of sufficient strength to ensure no metal is left behind. Upon completion of the work of this contract, work areas shall be left broom clean by the contractor.

Period of Performance Preconstruction meeting – Will be held within one week of contract award.

Notice to Proceed – Will be provided to the contractor after preconstruction meeting and upon receipt of all required documents.

Material Submittals – Due within 48 hours (or 2 business days) of Notice to Proceed Proposed completed work with all documentation submittals – 45 days after date on the Notice to Proceed.

Map of Project Location

Salt Pond Visitor Center Location