B08_A01_SOW_Chimney_Repairs_and_Replacement.pdf

STATEMENT OF WORK

Masonry Work

CAPE COD NATIONAL SEASHORE

Various Locations

May 6, 2021 (revised 5/17/21, 6/17/21)

Scope This project is for chimney removals, replacements, reconstruction, repairs, flashing work and other masonry repairs at various residential buildings in Cape Cod National Seashore.

Minimize disturbance to the site to the greatest extent possible unless directed otherwise.

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.

Locations of Work to be Performed:

Benz house chimney repairs, 30 Tomahawk Trail, Eastham, Deane house chimney repairs, 22 Tomahawk Trail, Eastham, Humphrey house chimney removal and reconstruction, 25 MacPherson Way, Eastham, Mazoulis #1 house chimney removal and wall/roof repairs, 360 Nellie Road, Wellfleet, Rockwell house partial chimney removal and reconstruction, 95 Ocean View Drive, Wellfleet, Secrest house replace chimney caps, 245 Cliff Road (245 Ocean Road), Wellfleet, Stranger house chimney removal and reconstruction, 80 Longnook Road, Truro, Lyman house chimney repairs, 28 Tomahawk Trail, Eastham, Tartaglia house chimney removal and reconstruction, stoop repairs, 135 Residence Road, Wellfleet, Wells house chimney repairs, 119 Residence Road, Wellfleet, Ryerson house chimney repairs and new damper, 325 Nellie Road, Wellfleet, Hardman house chimney repairs, 235 Cahoon Hollow Road, Wellfleet, Maker house chimney repairs, 189 Bound Brook Way, Wellfleet, Duarte house chimney and stoop repairs, 84 South Pamet Road, Truro, Churma house chimney and stoop repairs, 8 Meadow Terrace, Truro, Lightmas house chimney repairs, 30 Tin Pan Alley, Provincetown, Aldrich house chimney repairs and new damper, 32 Tin Pan Alley, Provincetown, Jedidiah Higgins house chimney repairs, 26 Higgins Hollow Road, Truro, Sirna studio partial chimney removal and reconstruction, 60 Way #004, Wellfleet, Pamet River Coast Guard Station chimney removal and roof repairs, 111 North Pamet Road, Truro, Penniman house chimney repairs, 70 Fort Hill Road, Eastham.

Measurements Estimated dimensions and quantities are provided as a guide only. The contractor is responsible for verifying all measurements and dimensions. 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 strongly suggested that offerors examine each of the work sites to confirm existing conditions and required quantities prior to submitting a proposal on this project.

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 (CO) between 8:00 a.m. and 4:00 p.m. on non-holiday weekdays.

Utilities and Services 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 supply temporary potable water adequate to the needs of the contract 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.

Submittals and Deliverables Submit safety plan that complies with OSHA standards within 3 business days after award.

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

Provide detailed proposed project design, layout, and schedule prior to commencing any work on site.

Product Data: provide manufacturers' literature on characteristics of materials, maintenance, parts list and warranties. Submit only pages which are pertinent. Mark each copy to identify pertinent products referenced to the specifications. Provide manufacturers’ literature, drawings, and technical data sufficient to fully define the material and to demonstrate full compliance with the contract specifications.

Manufacturer's Installation Instructions: Include special precautions from manufacturer.

Drawings: submit drawings as appropriate.

Materials: submit representative samples of all materials to be used in sizes adequate to define the purpose of the material and determine its suitability.

Manufacturer's certificate: certify that products meet or exceed specified requirements.

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 are 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.

Take all necessary precautions to prevent fire during construction. 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.

Confined space entry, fall protection and hardhat use shall conform to the strictest safety rules and regulations of entities having jurisdiction. Fall protection plan shall be posted or made available prior to start of elevated work or any other time it is required.

The contractor’s representative shall have an updated First Aid card.

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. 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.

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.

Scope of Work The following work shall be performed at all chimney repair areas:

• Remove and replace sheet metal chimney flashings including, but not limited to, step, base, reglet, counter, and apron flashings.

• Rake and repoint, and/or replace cracked or spalled brick masonry units at chimneys. Restore weep holes to functionality.

• Install new crowns and caps (if needed) as described below.

The following work shall be performed at all chimney removal and chimney replacement areas:

• Remove chimneys to extent described below.

• Install new chimneys, including footings, foundations, crowns, caps, flashing and all internal and external components necessary to achieve full functionality.

• Repair building walls and roofs with like materials and caulking to ensure tight weatherproof building envelope.

The following work shall be performed at all stoop repair areas:

• Remove and reinstall all loose masonry units.

• Replace missing masonry units with new to match function and appearance of existing to remain.

Specific Requirements at Each Location – see photos below

• Benz house: repair/repoint/reflash 24”x 32” x 50” high chimney, new crown, new cap for chimney if needed;

• Deane house: repair/repoint/recrown/reflash 2’ x 6’ x 3’ high chimney, new cap for chimney;

• Humphrey house: remove and rebuild entire chimney, including flashing, crown, cap, foundation and footing, complete: 18’-8“ high, 24” x 54” base tapering to 24” x 40” stack;

• Mazoulis #1 house: remove entire chimney, 14’ high, 16” x 56” base tapering to 16” x 32” stack, including footing, remove 45” x 56” fireplace, remove 24” x 56” hearth, repair foundation: 20 square feet, make repairs to clapboard wall: 50 square feet, repair roof: 4 square feet, replace roof trim boards: 3 ½ linear feet, frame wall and install interior wood paneling and exterior clapboards to fill fireplace opening to match existing, frame floor and install subflooring and carpeting to match adjacent at removed hearth: 24” x 60”, install 60” of 4” vinyl cove base at wall to match existing;

• Rockwell house: remove and reconstruct 10’-4” x 3’ x 8’ high chimney above roofline, including crown, new cap, flash chimney;

• Secrest house: replace broken chimney cap, install 2nd chimney cap on clay flues;

• Stranger house, remove and rebuild entire chimney, including flashing, crown, cap, foundation and footing and interior components, complete: 17’ high, 24” x 72” base tapering to 24” x 30” stack;

• Lyman house, repair/repoint/recrown/reflash 28” x 40” x 36” high chimney, new cap if needed;

• Tartaglia house, remove and rebuild chimney on existing foundation, including flashing, crown, cap and interior components, complete: 15’ high, 24” x 60” base tapering to 24” x 44” stack, repair 28” x 50” brick and flagstone stoop;

• Wells house, repair/repoint/recrown/reflash 24”x 32” x 36” high chimney, new cap for chimney if needed;

• Ryerson house, repair/repoint/reflash 24” x 32” x 40” high chimney, new crown and cap for chimney; replace damper;

• Hardman house, repair/repoint/reflash 24” x 32” x 40” high chimney, new crown, new cap if needed;

• Maker house, repair/repoint/reflash 16” x 16” x 36” high chimney, new cap if needed;

• Duarte house, repair/repoint/reflash 32”x 40” x 36” high chimney, install new crown and cap, reconstruct 64” x 56” brick stoop;

• Churma house, repair/repoint/reflash 20” x 36” x 4’-6” high chimney, new crown and cap, repair 36” x 44” brick stoop;

• Lightmas house, repair/repoint/reflash 24” x 36” x 30” high chimney, new crown, new cap if needed;

• Aldrich house, repoint 30 square feet of chimney, replace 20” x 40” crown, reflash 10 linear feet, replace damper, new cap if needed;

• Jedidiah Higgins house, repair/repoint/reflash 20” x 20” x 30” high chimney, new crown, new cap if needed;

• Sirna studio, remove and reconstruct 5’ high x 8’ wide x 4’ deep chimney above roofline, including crown, flashing, counterflashing, parging and new cap;

• Pamet River Coast Guard Station, remove top 20” x 44” x 6’ high section of ocean-side chimney to below roof line, including cricket, replace any deteriorated roof decking encountered, repair roof;

• Penniman house, remove existing paint on two chimneys, 170 square feet total (85 square feet each), replace a total of 30 bricks, repoint chimneys (170 square feet total), apply new vapor-permeable masonry coating, 170 square feet total (85 square feet each).

Work and Weather Limitations Regular work hours are between 8AM 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.

All work on historic buildings shall be done in conformance with the Secretary of the Interior Standards for the Treatment of Historic Properties. Confirm which buildings are historic with COR prior to commencement of any work.

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 and Safety 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 Furnish, supply, and install all necessary materials to successfully complete the project requirements.

Unless explicitly indicated, new materials shall match those being replaced.

Sheet Metal, Flashing, Accessories Sheet Flashing shall be ASTM A 361/A361M; 26 Gauge (0.45 mm) steel with minimum G115/Z350 galvanized coating, ASTM B 209; 0.025 (0.63mm) thick aluminum, mill finish.

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.

Rivets shall be 3/16’’ diameter copper.

All accessories including nails, screws and clips shall be copper, brass, stainless steel or galvanized steel and completely compatible with the surrounding metal to prevent galvanic reaction.

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.

Sealant required for incidental sheet metal and flashings work shall be one-part acrylic conforming to Fed. Spec. TT-S-230 or approved equal.

Sealant for exposed locations shall be one-part polyurethane sealant conforming to ASTM C920, Type S, Grade NS, Class 23, Uses NT, M, A, and O, such as Dymeric by Tremco, Sikaflex 1a by the Sika Corp., Vulkem 116 as manufactured by Mameco International, Inc. or approved equal.

Mastic for back-sealing sheet metal against non-metal substrates shall be as recommended by the shingle or underlayment manufacturer. Concealed sealant for back-sealing metal-to-metal connections shall be single-components, butyl (polyisobutylene) rubber sealant, heavy bodied for joints with limited movement.

Water based, quick drying, asphalt primer for metal flanges and brick masonry surfaces shall conform to ASTM D276, D562, D3278, and D3960.

Chimney Repairs/Replacement Wherever possible and unless otherwise indicated, existing bricks from the chimney shall be retained.

Where new brick is required, brick shall comply with ASTM C 216, grade SW, type FBS specification, and match the existing bricks in dimension, shape, color, flash characteristics, surface texture and edge characteristics.

Combustion chamber firebrick, where needed, shall be in accordance with ASTM C 64.

Chimney footing foundation material shall match existing. Concrete Block – conforming to ASTM C-90 Grade N, ASTM C-129.

Masonry wall ties shall be galvanized or stainless steel, intended for the purpose.

Replacement heating system flues/ductwork shall match existing.

Fireplace flue liner shall be clay, intended for the purpose and meeting Clay Flue Lining Institute and

ASTM C-315, C-1283.

Backer rod at crown shall be all-weather, intended for the purpose.

Fireclay mortar, where needed, shall be non-water soluble refractory mortar in accordance with ASTM C

105. Fireclay mortar joints shall be 1/16 to 3/16 in. (1.6 to 4.8 mm) thick to reduce thermal movements and mortar joint deterioration.

Mortar for chimney shall be suitable in strength for the brick being used and appropriate for the application. Match the existing mortar as closely as possible, for color, cement content and compressive strength.

Repointing mortar shall be Type N (1 part Portland Cement, 1 part lime, and 6 parts sand), conforming to ASTM C270 Specifications and shall match the existing in color, texture, and appearance.

Portland Cement. ASTM C-150, Type 1, white or gray as required to achieve a match of the existing mortar color. Masonry Cement only as appropriate. Concrete Mix – ASTM C-39 (for the hearth slab and chimney cap).

Chimney crown materials shall be standard to the industry and shall include concrete materials, galvanized reinforcing, compression material for flue, bond breaker or flashing and all other materials necessary to construct the crown.

Hydrated Lime. ASTM C-207, Type S, Hydrated Lime for Masonry Purposes. Air entrained lime will not be permitted.

Aggregate conforming to ASTM C-144. Aggregate shall be clean, well-graded sand, matching the color and grain size of aggregates in the original mortar.

Water shall be potable and free from deleterious amounts of acid, alkali or other materials.

Parging material for Sirna chimney shall be as intended for the purpose and for use on new brickwork and shall match existing in all salient characteristics. Acceptable manufacturers include KwikMix, KPM Industries, Quikrete Companies.

Paint removal material for Penniman chimneys shall be a water-based, non-flammable, methylene chloride-free and VOC-free, emulsifying paint removal product suitable for removal of paint from masonry and intended for use on historic structures. As an advisory to the contract, Dumond Chemicals Peel-Away products meet the requirements of this contract.

Vapor-permeable masonry coating for Penniman chimneys shall be Prosoco BMC II, Keim coating or equal with custom color to match existing. Contractor to submit color samples for approval prior to application.

Damper shall be cast iron throat damper to match existing unless otherwise directed, certified to have air infiltration losses in closed position not to exceed 20 cubic feet per minute.

Steel angle at fireplace opening, where needed, shall meet ASTM A-36 and be intended for the purpose to match existing unless otherwise directed.

Chimney cap shall be bolt-on rectangular stainless steel 20 gauge hood and base with built in 8 inch high screening with standard 3/4 inch oval hole mesh to prevent creosote build-up, sized to fit each chimney.

Caulking All joints or gaps where water invasion may occur shall be filled with Benjamin Moore Elastomeric 465 01 Caulk, or an approved equivalent.

House-wrap siding underlayment for application over wall sheathing Nonwoven spun, water- resistant, extremely fine fused high-density polyethylene (HPDE) lightweight, breathable pliable fabric made to resist bulk water and air penetration, reduce mold and water damage, stop air movement through walls and allow moisture vapor to pass through. As an advisory to the contract, Dupont Tyvek meets the above-listed criteria.

Roof, wall and floor structural members and sheathing Dimensional lumber wood to match existing species, shape and dimensions.

Pressure treated exterior grade plywood, thickness to match existing.

Interior wall paneling - Mazoulis 1” #2 WP4/#116 tongue and groove premium heart pine.

Flooring – Mazoulis Blue indoor/outdoor carpeting to match existing. Cove molding shall be 4” PVC vinyl wall base to match existing.

Replacement Shingles – Mazoulis and Pamet River Coast Guard Station Shingles required to repair roofs at removed chimneys shall match existing in all salient characteristics.

Provide self-adhered roofing underlayment.

Siding Materials

Cedar clapboard siding shall be kiln-dried plain bevel ½” X 6” clear vertical grain heartwood per NLGA paragraph 201a, Western Red Cedar, factory finished, color to match existing. Siding exposure shall match existing.

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

Fasteners

Fasteners shall be of a length sufficient to penetrate into the sheathing at least ¾”, stainless steel type

316 (not type 304) ring shank blunt tip nail with minimum 7/32" head. Likely length of fastener: 1 ½” to

1 ¾”” long.

Fasteners for clapboard siding shall be splitless stainless steel fasteners designed for siding installation with a thin shank and blunt point with either ring or spiral shank. Fastener length shall be adequate to provide a minimum penetration of 1 1/4” into solid wood.

Wood Finishes Finishing products for use in the work shall be the standard best or top brands produced for each particular kind of material required herein. The label on the primer container should indicate that the coating is recommended for use as stain blocking primer for Western Red Cedar. Highest quality, standard brand, polyurethane, latex stain-blocking primer and paint as recommended for exterior use.

Provide primers and other undercoat paint produced by same manufacturer as finish coats. Acceptable manufacturers: 1. Sherwin Williams; 2. Benjamin Moore; 3. Valspar; or equal meeting the specified salient characteristics and as approved by the Government.

All new trim material shall be factory pre-finished on all six sides of each board. All wood trim finishes shall be highest quality, standard brand, stain-blocking primer and latex paint as recommended for exterior use with mold and mildew inhibitors, factory applied to all surfaces of new wood materials in a manner consistent with manufacturer’s recommendations and best practices of the industry. Color to match existing. One coat primer and two coats of finish coat.

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

Provide waste-collection containers in sizes adequate to handle waste from construction operations.

Comply with requirements of agency(ies) with jurisdiction.

Unless otherwise indicated, disposal of removed materials shall be the contractor's responsibility. All debris and removed material are the property of the contractor and shall be recycled or legally disposed of in a manner that is consistent with local and state regulations.

Carefully remove reuseable chimney caps for future reinstallation.

At Jedediah Higgins house, photo-document repair of chimney.

At Pamet River Coast Guard Station and Sirna studio, photo-document dismantling and removal of chimneys.

Where indicated, remove chimneys and damaged sections of chimneys in a manner to not cause damage to adjacent building materials and components to remain. Carefully detach and remove previously installed straps, cables, bolts and other efforts to stabilize chimneys and seal any holes resulting from removals. Salvage reuseable interior fireplace components to the greatest extent possible.

Remove and dispose of chimney crowns and parging materials. Unless otherwise indicated, disassemble chimneys in a manner that allows for brick to be reused to the greatest extent possible. Clean existing bricks for reuse on chimney.

At Pamet River Coast Guard Station, remove chimney cricket at time of chimney removal.

At Penniman house chimneys, remove existing paint completely prior to commencing masonry repairs, following manufacturer’s specifications.

Installation Store materials so they remain clean and dry.

Chimney Masonry Work All masonry work shall be completed prior to flashing work. Repointing and rebuilding work shall be performed only when air temperatures are expected to remain above 40° Fahrenheit during the work and for a period of at least 7 days upon completion of the work. Cold weather work will not be permitted.

Existing mortar joints that are in sound condition may remain undisturbed. All mortar joints that are friable or cracked shall be removed in preparation for repointing.

Reopen weep holes.

Remove old counter flashings and mortar to a depth of 2½ times the thickness of the joint or ¾”, whichever is greater. Joints requiring installation of counter flashings shall be fully cleaned out to a 2” depth to provide a reglet for flashing. Coordinate locations for counter-flashings with flashing installation.

Remove all loose, friable mortar, to reach sound existing mortar. Remove mortar from both surfaces of the adjacent masonry units and square out at the back of the joint.

Thoroughly rinse raked joints with water to remove fine particles.

Apply mortar in layers not exceeding 3/8” in depth. Apply each layer fully compacted into the joint and allow to become thumbprint hard prior to the application of the next layer. Tool final layer of mortar after it has become thumbprint hard.

Remove spalled, eroded and cracked brick and replace with new. Remove and salvage loose bricks for reinstallation. Clean existing undamaged bricks for reuse on chimney. Install new or replaced bricks.

Tool the joints to a profile matching the adjacent brick masonry mortar joints.

New chimney work shall conform to best practices of the industry and shall accommodate expansion and contraction during normal operating temperatures of residential fireplaces and chimneys.

Reconstruct chimneys, complete, with flues, ductwork, dampers and all components of replaced chimneys, using existing brick, supplemented with new brick as necessary, to match existing in size and shape. Reconnect interior fireplace components to remain to the new work to result in a fully functional operating fireplace.

Construct new crowns to match existing in size and appearance and ensuring positive drainage.

Where needed, new chimney foundations shall be constructed to support the weight of the new chimney assembly and extend a minimum of 6” beyond each face of the masonry bearing on it.

Install wall ties according to best practices of the industry, spaced a maximum of 16” vertically and embedded at least 2” into bed joints of the brick masonry.

At Sirna studio, apply parging to chimney per best practices of the industry, to match existing, including thickness and color.

At Penniman house, apply vapor-permeable masonry coating to chimneys per best practices of the industry and manufacturer’s specifications, to match existing, including color.

Install or reinstall chimney caps.

Chimney Flashing Work All new flashing shall replicate the character and details of the existing flashing. Furnish and install lead coated copper chimney flashings including, but not limited to, step, base, reglet and counter flashings.

At Sirna studio, install flashings in lengths and methods to accommodate future roof replacement that may result in a roof that is up to two inches lower than existing. Flashing to accommodate future roof elevation shall be installed and secured to ensure weather-tightness until the roof is replaced.

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 joint. 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 shall 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.

Separate dissimilar metals by painting each metal surface in area of contact with a bituminous coating, by applying rubberized asphalt underlayment to each metal surface, or by other permanent separation as recommended by manufacturer’s or dissimilar metals.

Exposed masonry walls (behind and below counterflashings), and sheet metal flanges (both sides) shall be primed with water based asphaltic primer, prior to roofing or flashing installation. Apply primer by brush at a rate of 200 square feet per gallon with no bare spots. Allow primer to dry thoroughly prior to installing the flashings.

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.

Stepped Base Flashing: Form from separate pieces of lead coated copper concealed between each shingle course and extending 6’’ minimum outward onto the roof and 4’’ minimum up the chimney.

The upper edge of each stepped flashing shall extend 3”‘ above each course of shingles. The lower edge shall be ½’’ above the shingles forming the next course. At chimney corners connect base flashing by a locked soldered seam.

Counterflashing: Clean out and chisel out 3/8’’ wide by 1’’ deep reglet groove. Insert counterflashing 9 - 10” above roof decks, extend down vertical surfaces over upturned vertical leg of base flashings not less than 5”. Fold the exposed edges of counterflashings ½”. At stepped counterflashings, install in short lengths a minimum of 8” by 10”. Provide end laps in counterflashings not less than 6’’ in the direction of water flow and render weathertight with plastic cement. Secure the flashings in the reglets with construction adhesive and lead wedges spaced at 8” minimum; Tamp wedges in place tightly without spalling brick surfaces. Fill reglet joints with tooled mortar. Crimp clips to bottom of new reglet flashing.

Apron flashing: Extend over new shingles not less than 16” with a ½’’ hemmed edge and extend up the chimney face at least 6”. Apron flashing shall be soldered to the base flashings vertically and horizontally. Wrap apron flashing at corners a minimum of 4”.

Roof repairs Make repairs/replacements to deteriorated adjacent roof structural and decking materials as needed for sound durable surface. Install all necessary structural members, plywood, roofing underlayment and shingles. Weave new shingles into existing.

Install trim boards and fascia as necessary to complete roof overhang.

Wall and Floor Repairs - Mazoulis Re-frame and sheathe openings with dimensional lumber and plywood to match existing species, shape, sizes and dimensions. Install tongue and groove paneling on interior wall, finish to industry standards to match adjacent walls. Install piece of carpeting to match existing on floor. Install cove molding at wall with appropriate adhesive to match existing.

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.

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.

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. 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 – 120 days after date on the Notice to Proceed.

Benz house

Deane house

Humphrey house

Mazoulis #1 house

Rockwell house

Secrest house

Stranger house

Lyman house

Tartaglia house

Wells house

Ryerson house

Hardman house

Maker house

Duarte house

Churma house

Lightmas house

Aldrich house

Jedidiah Higgins house

Sirna studio

Pamet River Coast Guard Station

Penniman house

Map of Project Locations

Benz house

Lyman house

Tartaglia house

Wells house

Humphrey house

Rockwell house

Ryerson house

Mazoulis #1 house

Hardman house

Maker house

Jedidiah Higgins house

Duarte house

Stranger house

Pamet River Coast

Guard Station

Aldrich house

Lightmas house

Churma house

Sirna studio

Secrest house

Penniman house