Atch_1_SOW.pdf

140P5424R0004 Attachment 1

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NATIONAL PARK SERVICE

TIMUCUAN ECOLOGICAL AND HISTORIC PRESERVE

JACKSONVILLE, FL

STATEMENT OF WORK (SOW)

PMIS 314428A

REMOVE AND REPLACE THE WOODEN ROOF ON THE KINGSLEY PLANTATION MAIN HOUSE

1. Description of Services:

This project entails:

• The removal and disposal of the CCA treated #1 Alaskan Yellow Cedar Shingles that were installed during the spring of 1998.

• The removal and disposal of lead-coated copper (LCC) flashing and valleys. The removal of the 3” and 5” half round gutter and downspout system.

• Procurement and installation of Cedar Shingles, LCC valleys, and all LCC flashing (flashing, step flashing, drip edges, etc.) around the structure.

• Installation 5” half round white aluminum gutter and downspout system.

This project requires an experienced contractor to perform the job. The Contractor shall provide all labor, material, tools, equipment, supervision, and other related items required to the complete the project as per scope of work, specifications. Contractors are advised to visit the site, verify the existing site conditions to develop their proposal.

From the time of its construction in 1797-98 until 1923 the Main House at Kingsley Plantation served as residence. John McQueen, who owned the property in 1797, lived there until 1804 when he sold the property to John McIntosh. John McIntosh eventually fled Florida in 1813 after the failed Patriot’s Rebellion. McIntosh subsequently leased his property to Zephaniah Kingsley in 1814 and moved his family and enslaved laborers shortly thereafter.

Kingsley purchased the property in 1817 and remained there until 1837 when he moved his family and slaves to Haiti. He sold the plantation to his nephews, Ralph King and Kingsley Beatty Gibbs. Kingsley Beatty Gibbs eventually moved to the property in 1841, but was only able to live there eleven years, when under significant financial strain he mortgaged the property and moved with his family to St.

Augustine. The Main House would not be lived in again until Charles Barnwell moved with his family to the island in 1860. At the end of the Civil War the Barnwells mortgaged the property and the house was empty again. It was not until 1869 that Rollins family moved into the house and a family member would live there until 1906, when Hannah Rollins passed away. Hannah and John Rollins’s daughter Gertrude Rollins Wilson purchased the house in 1906 and retained ownership until 1923 when she sold the property to the Fort George Club Corporation.

The property then became a club and the Main House became quarters for the club members when they visited the island. The Fort George Club sold the Main House to the State of Florida in 1955 and it

Page 2 of 13 Pages has operated as a museum/historic house ever since. The state transferred ownership to the National Park Service 1991.

The Kingsley Plantation, including the Main House, is a contributing property of the Kingsley Plantation Historic District, which is listed on the National Register of Historic Places. The Kingsley Plantation is associated with the early settlement of northeast Florida, antebellum Florida, antebellum plantation agriculture, postbellum farming adaptations to a new post-war economy, and finally to the twentieth-century transition to recreational use. It is also significant for its association with Zephaniah Kingsley.

2. General

Contractor shall restore all surfaces disturbed by construction to match with existing finish. Any deviation from the original contract/scope of work shall be informed to COR before work begins. No additional work or changes will be carried out without a contract modification.

3. Tasks

1) Assessment, Planning and Procurement: This task consists of a site visit to assess the project. The vendor will conduct site visits for verification of existing conditions and continue to prepare for various aspects of the project. The vendor will also identify and complete procurement of needed roof shingles, roofing materials, accessories, and equipment to complete work.

2) Mobilization, Site Preparation, and Scaffolding:

a) Contractor will develop a mobilization plan for the project will be developed detailing project schedules. All tools, equipment, and materials necessary for project completion will be assembled and transported to a staging area designated by TIMU. Coordinate vehicular access to the site with COR. All staging and set-up areas are to be fully restored at project completion.

b) The Contractor must prepare the jobsite with a roll-off dumpster, and portable toilet in the staging area designated by TIMU."

c) If erected scaffolding will be built to OSHA standards, designed with visitor and park staff protection, and contain protected entrances to the buildings, as required. Practice extreme caution when working in areas adjacent to pedestrian walkways. Coordinate with COR if work will encroach on pedestrian paths.

d) High visibility temporary safety fencing will be erected around the site to protect visitors and park staff. Coordinate construction fencing locations with COR and phase fencing with roof construction, as needed.

e) Provide roof protection for anticipated weather conditions. Check all tarps daily to ensure protection of unfinished roofs and that flashing and temporary water management are adequate for protection of structure below.

f) All building openings to have dust protection. Seals to be airtight to prevent all dust from entering the building interior.

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3) Install New Western Red Cedar Shingles, 100% clear, 100% heartwood, 100% edge grain with no defects. Lead-coated Copper Flashing and Valleys, and 5” White Aluminum Half Round Gutter System:

a) The wood shingled roof of the Main House has surface total of approximately 3,350 sq. ft. The current Alaskan Yellow Cedar wood shingle roofing and lead-coated copper flashings were installed by Historic Preservation Training Center (HPTC) in 1998. Most of shingles were installed on a single layer horizontal wood furring strip grid (skip sheathing), fastened to the underlying solid sheathing. This method was used to promote ventilation, in-lieu of a ventilation mat.

b) The underlying solid sheathing/decking is presumed to be in good condition

i) This contract allows for up to 20% in-kind replacement of solid sheathing. New to be installed to replace deteriorated wood decking and to align with existing. Secure with type 316 stainless steel attachments.

ii) Match existing dimensions in width and thickness. The actual size will vary and must be matched to existing “actual sizes” to avoid any uneven areas in the roof decking. Anticipate widths varying from 3in to 7in for bidding purposes. Board lengths are not required to match. Match existing edge pattern and face surface.

iii) Match species and quality of existing wood. Assume to be similar to southern yellow pine for bidding purposes.

iv) Standard for solid-sawn wood decking: Comply with AITC 112, “Standard for Tongue-and- Groove Heavy Timber Roof Decking.” Forest Certification: Provide wood decking produced from wood obtained from forests certified by an FSC-accredited certification body to comply with FSC 1.2 “principals and criteria.”

v) Provide solid-sawn wood decking with each piece factory marked with grade stamp of inspection agency evidencing compliance with grading rule requirements and identifying grading agency, species, grade, moisture content at time of surfacing, and mill. Stamps to be applied to surfaces that will not be exposed to view.

vi) Moisture Content: Provide wood decking with 15 percent maximum moisture content at time of dressing.

vii) Decking Grade: Dense Standard Decking. Select to match existing and as indicated in drawings for new deck boards. Assume no more than one knot per 2’-0” length. Maximum knot size ½” diameter.

c) The condition of the furring strips are unknown; assume full replacement of furring strips. See specifications for roof decking.

i) The contractor must provide a deduct unit price, to include the following: Furnishing and installing of new wood furring strips, as required. Match existing furring strips in dimensions. Assume southern yellow pine or similar species – clear select. Unit of measurement: Per 25 linear feet.

ii) Moisture Content: 19 percent maximum for lumber items not specified to receive wood preservative treatment.

iii) Placement of furring strips must accommodate 4 ½" exposure to match the historic.

d) Upon removing the shingles and nails, the roof decks will be cleaned off, loose furring strips to remain will be reattached with type 316 stainless steel decking screws as needed, the hardware cloth will also be inspected and replaced if needed.

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e) The wood shingles are installed at 4-1/2” to the weather to match the historic exposure. This reduced exposure requires approximately 58 squares of 18” (Perfection) No. 1 CSSB Blue Label Western Red Cedar Shingles (Certigrade)to cover the approximate 3,350 square feet of roof area including the starter courses, Boston ridge cap, and waste. Obtain shingles through one source from a single manufacturer.

i) Grade: No. 1 CSSB Blue Label with starter courses of same.

ii) Size: 18 inches long; ½" at butt.

iii) Installed with maximum 4 ½" exposure (triple lap).

f) All shingles are to have Fire Retardant Treatment: Class-B Certi-Guard pressure impregnated with fire retardant treatment. Must have UL certification for fire retardant.

g) General: Install wood-shingle roofing according to manufacturer's written instructions and to recommendations in CSSB's "New Roof Construction Manual" and NRCA's "NRCA Roofing Manual: Steep-Slope Roofing Systems.

i) All shingles must be nailed and secured to battens at all times with two nails for each shingle.

ii) Install first course of wood shingles directly over starter course and in continuous straight-line courses across roof deck. Install second and succeeding courses of wood shingles in continuous straight-line courses across roof deck.

(1) Extend 1 inch over rake edge, shim at rake to create cant using continuous tapered Red cedar board.

(2) Offset joints between shingles in succeeding courses a minimum of 1-1/2 inches. Do not allow alignment of vertical joints in alternate courses.

(3) Space shingles a minimum of 1/4 inch and a maximum of 3/8 inch apart. Fasten each shingle with two nails spaced 3/4 to 1 inch from edge of shingle and 1-½ to 2 inches above butt line of succeeding course. Drive fasteners flush with top surface of shingles without crushing wood. See drawings for additional requirements.

(4) Maintain weather exposure of 4 ½ inches for 18-inch long shingles.

iii) Open Valleys: Cut and fit wood shingles at open valleys, trimming upper concealed corners of shingles. Maintain uniform width of exposed open valley from highest to lowest point.

h) The shingles will be installed with ASTM F 1667, stainless-steel, Type 316 box-type wire ring shank nails, sharp pointed, and of sufficient length to penetrate a minimum of 3/4 inch into sheathing or furring strips following the Cedar Shake and Shingle Bureau (CSSB) and the National Roofing Contractors Association (NRCA) standards and best practices. Roofing staples are not permitted.

i) Install wood shingles, beginning at lower end, with a double-layer starter course, projecting shingles 1-1/2 inches beyond fascia, but only 1 inch at gutters. Space adjoining shingles ¼ apart, attach each shingle with 2 fasteners spaced 3/4 to 1 inch from edge of shingle and 1-½ to 2 inches above butt line of subsequent course. Achieve a triple lap installation. Stagger edge joints a minimum of 1-1/2 inches in succeeding courses. Prevent alignment of vertical joints in every third course. Drive fasteners tight to top surface of shingles without crushing wood. DO NOT OVERDRIVE THE NAILS. Install edge with positive water flow.

j) Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

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i) Wood Shingles: Furnish shingles equal to 2 percent of amount installed, but not less than 100 sq. ft. identical to each type, in unbroken bundles.

k) Provide a continuous 4in exposed strip of copper, installed between courses of shingles and with approximately 1in of copper visible at the bottom of the coursing. Strips will be installed along the width of roof planes to deter biological growth. The 4in copper strips are interwoven in the courses of shingles and approximately 1” of copper visible at the bottom of the coursing. Strips will be installed approximately centered on the run of each plane of roof, and the 2nd will be located near the ridge.

l) The shingles will also be laid with a swale rake edge created by a single course of horizontal shingles as previously installed by HPTC.

m) The ridge will be finished off with traditional Boston ridge cap, cap shingles will be fabricated from the roof shingles. No prefabricated ridge units are permitted.

n) Underlayment Materials:

i) Felt: ASTM D 226/D 226M, Type II, asphalt-saturated organic felts, non-perforated. Use as underlayment. Felt to be used only where existing felt is and not to be interwoven between shingles.

(1) Felt-Underlayment Nails: stainless-steel Type 316 with 1-inch minimum diameter, low-profile capped heads or disc caps. Provide with minimum 0.0134-inch- thick cap and with minimum 0.105-inch thick shank of length to penetrate at least 3/4 inch into roof sheathing.

ii) Self-Adhering Underlayment: High-Temperature Sheet: 30 to 40 mils thick minimum, consisting of slip-resisting polyethylene-film top surface laminated to layer of butyl or SBSmodified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer. 100% Butyl Based Underlayment.

(1) Thermal Stability: Stable after testing at 300 deg F; ASTM D 1970.

(2) Low Temperature Flexibility: Passes after testing at minus 20 deg F; ASTM D 1970.

(3) A strip of ice and water shield will be applied to the ridges and hips prior to the cap shingles for additional protection from water infiltration.

(4) Comply with underlayment manufacturer's written installation instructions applicable to products and applications indicated unless more stringent requirements apply. Install, wrinkle free, on roof deck. Comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Install lapped in direction that sheds water.

Lap sides not less than 3-1/2 inches Lap ends not less than 6 inches staggered 24 inches between courses. Roll laps with roller. Cover underlayment within seven days.

o) The lead coated copper (LCC) chimney flashing installed in 1998 will be replaced in-kind. New apron, step, and counter flashings will be fabricated on-site. Lead-Coated Copper Sheet: ASTM B 101, Temper H00 and H01 32 oz, cold-rolled copper sheet, all fabrications of 20 ounces per square foot with the exception of Wind Locks of 32 ounces per square foot, coated both sides with lead weighing not less than 12 lb/100 sq. ft. nor more than 15 lb/100 sq. ft. of copper sheet (total weight of lead applied equally to both sides).

i) General: Sheet metal flashing and trim assemblies shall withstand wind loads, structural movement, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction. Completed sheet metal flashing and trim shall not rattle, leak, or loosen, and shall remain watertight.

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ii) Thermal Movements: Allow for thermal movements from ambient and surface temperature changes to prevent buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Base calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

(1) Temperature Change: 120 deg F ambient; 180 deg F material surfaces.

iii) Fabricate sheet metal flashing and trim to comply with recommendations in SMACNA and Copper Development Association Manual that apply to design, dimensions, metal, and other characteristics of the item.

iv) Obtain field measurements for accurate fit before shop fabrication. Form sheet metal flashing and trim to fit substrates without excessive oil canning, buckling, and tool marks;

true to line, levels, and slopes; and with exposed edges folded back to form ¾" wide hems.

Conceal fasteners and expansion provisions where possible. Do not use exposed fasteners on faces exposed to view.

v) Expansion Provisions: Form metal for thermal expansion of exposed flashing and trim. Form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with butyl sealant concealed within joints. Space movement joints at maximum of 10 feet with no joints within 24 inches of corner or intersection.

vi) Fabricate cleats and attachment devices from same material as accessory being anchored or from compatible, noncorrosive metal.

vii) Do not use graphite pencils to mark metal surfaces.

viii) Apron Flashings: Extend lower flange over and beyond each side of downslope wood roofing and up the vertical surface.

ix) Ridges and Edges: Cut and fit shingles at ridges and edges to provide maximum weather protection. Install fasteners at ridges of sufficient length to penetrate sheathing as specified.

Maintain minimum widths permitted.

x) Step Flashings: Install with a head lap of 4 inches and extend both horizontally and vertically.

Install with lower edge of flashing just upslope of, and concealed by, butt of overlying shingle. Fasten to roof deck only.

xi) Cricket or Backer Flashings: Install against the roof-penetrating element, extending concealed flange beneath upslope wood roofing and beyond each side.

xii) Open-Valley Flashings: Install centrally in valleys, lapping ends at least 8 inches in direction to shed water. Fasten upper end of each length to roof deck beneath overlap.

(1) Secure hemmed flange edges into metal cleats spaced 12 inches apart and fastened to roof deck.

xiii) Rake Drip Edges: Install over underlayment and fasten to roof deck.

xiv) Eave Drip Edges: Install beneath underlayment and fasten to roof deck.

xv) Pipe Flashings: Form flashing around pipe penetrations and wood roofing. Fasten and seal to wood roofing.

xvi) The reglets will be pointed with an appropriate mortar for the project that matches the existing in color and texture.

xvii) Fasteners: Self-tapping screws, self-locking rivets and bolts, and other suitable fasteners designed to withstand design loads. Blind fasteners or self-drilling screws, gasketed; with hex-washer heads must be in Stainless Steel 316. Exposed Fasteners: NOT PERMITTED. Blind

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Fasteners: Rivets NOT PERMITTED. Use fastener sizes that penetrate wood blocking or sheathing not less than 1-¼ inches for nails and not less than 3/4 inch for wood screws.

xviii) Conceal fasteners and expansion provisions where possible in exposed work and locate to minimize possibility of leakage. Cover and seal fasteners and anchors as required for a tight installation.

xix) Seal joints as required for watertight construction. Bed flanges of work in a thick coat of roofing cement where required for waterproof performance. Locations must be submitted on shop drawings and reviewed prior to installation.

xx) Roof Edge Flashing: Anchor to resist uplift and outward forces according to recommendations in cited sheet metal standard unless otherwise indicated. Interlock bottom edge of roof edge flashing with continuous wind lock anchored to substrate at 3-inch on center.

p) Solder for Lead Coated Copper: ASTM B 32, Grade Sn60, 60 percent tin and 40 percent lead unless otherwise recommended by Sheet Metal flashing manufacturer. No other metal are acceptable.

q) The flashings shall be installed securely and in place, with provisions for thermal and structural movement as required to complete sheet metal and trim system. Install sheet metal flashing and trim to fit substrates and to result in watertight performance. Verify shapes and dimensions of surfaces to be covered before fabricating sheet metal.

i) Space cleats not more than 12 inches apart. Attach each cleat with at least two fasteners.

Bend tabs over fasteners.

ii) Torch cutting of sheet metal flashing and trim is not permitted.

r) Metal Protection: Where dissimilar metals contact each other, or where metal contacts pressure treated wood or other corrosive substrates, protect against galvanic action or corrosion by painting contact surfaces with bituminous coating or by other permanent separation as recommended by sheet metal manufacturer or cited sheet metal standard.

s) Joint Sealants:

i) Elastomeric Joint Sealant: ASTM C 920, of base polymer, type, grade, class, and use classifications required to produce joints in sheet metal roofing that will remain weathertight and as recommended by roll-formed sheet metal roofing manufacturer for installation indicated.

ii) Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;

polyisobutylene plasticized; heavy bodied for hooked-type expansion joints with limited movement.

iii) Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required for application. Proposed locations to be reviewed with COR.

iv) Asphalt Mastic: SSPC-Paint 12, solvent-type asphalt mastic, nominally free of sulfur and containing no asbestos fibers, compounded for 15-mil dry film thickness per coat.

v) Mastic Sealant: Polyisobutylene; nonhardening, nonshrinking, nondrying, nonmigrating sealant.

t) Separate Ice and Water Shield from flashing with rosin paper. Slip Sheet: Rosin-sized paper, 3.0-

3.4 lb. nominal weight.

u) The new 5in aluminum half round gutter and downspout system will be replaced in-kind with aluminum, and will be attached to the eaves around all of the structure. The second story gutter

Page 8 of 13 Pages system will empty into the copper lined valleys on the lower portion of the roof. The new 5in aluminum downspouts that currently empty onto the ground must be connected into the modified French drainage system where applicable. Gutter hangers will be attached to fascia.

Gutters and downspouts may be prefabricated.

Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. Wood Shingles: Furnish shingles equal to 2 percent of amount installed, but not less than 100 sq. ft. identical to each type, in unbroken bundles.

4. Specifications

a) Work under this contract shall be carried out strictly in accordance with specifications attached and will meet US and Local codes.

b) Work includes all finish Carpentry required for the roof on the Main House at Kingsley

Plantation.

c) The shingles shall be 18” (Perfection) No. 1 CSSB Blue Label Western Red Cedar Shingles

(Certigrade), with Class B Certi-Guard pressure-impregnated, fire-retardant treatment.

d) All work is to comply with the Secretary of the Interior’s Standards for the Treatment of

Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring & Reconstructing Historic Buildings The Secretary of the Interior's Standards for the Treatment of Historic Properties With Guidelines For Preserving, Rehabilitating, Restoring & Reconscructing Historic Buildings (nps.gov) and Preservation Brief 19- The Repair and Replace of Historic Wooden Shingle Roofs Preservation Brief 19: The Repair and Replacement of Historic Wooden Shingle Roofs (nps.gov) .

5. Submittals

a) Submit product data/literature for all paint products, wood, metal hardware, flashing manufacturer’s material and finish data. (with proposal)

b) Samples for Initial Selection Purposes:

(1) Submit manufacturer’s standard size samples of colors and finishes of paint.

c) Samples for Verification:

(1) Submit samples of all hardware.

(2) Shop drawings, to include all flashings, gutters, and downspouts.

(3) Draw-downs of selected paint colors.

(4) Wood decking and furring strips.

(5) Sheet metal flashing in specified weights.

d) Mockups: Before installing, construct mockups for each form of construction and finish required to verify selections made under Sample submittals and to demonstrate aesthetic effects and qualities of materials and execution. Build mockups to comply with the following requirements, using materials indicated for completed Work.

https://www.nps.gov/orgs/1739/upload/treatment-guidelines-2017-part1-preservation-rehabilitation.pdf https://www.nps.gov/orgs/1739/upload/treatment-guidelines-2017-part1-preservation-rehabilitation.pdf https://www.nps.gov/orgs/1739/upload/treatment-guidelines-2017-part1-preservation-rehabilitation.pdf https://www.nps.gov/orgs/1739/upload/preservation-brief-19-wood-shingle-roofs.pdf https://www.nps.gov/orgs/1739/upload/preservation-brief-19-wood-shingle-roofs.pdf

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(1) Install a wood shingle installation at eaves with a minimum area of 4 square feet to provide a full mockup of the roof installation to include all materials specified.

(2) Locate mockups in accessible location of the size indicated.

(3) Notify COR 7 days in advance of the dates and times when mockups will be constructed.

No mockups should be prepared until all shop drawings and material submittals have been accepted.

(4) Subject to following requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

(5) To include all applicable sheet metal flashing.

6. Product handling:

a) Store roofing materials in a dry, well-ventilated location protected from weather and moisture according to manufacturer's written instructions. Labels must be intact.

b) Store underlayment rolls on end, on pallets or other raised surfaces. Do not double stack rolls. Protect from sunlight until installation.

c) Protect unused roofing materials from weather and moisture when left overnight or when work is not in progress.

d) Handle, store, and place roofing materials in a manner to prevent damage to roof deck or structural supporting members.

e) Retain all necessary labels for fire treatment and shingle CSCB labels to obtain all necessary warranties and to allow COR to verify products are in compliance with specified products.

f) Do not store sheet metal flashing and trim materials in contact with other materials that might cause staining, denting, or other surface damage. Store sheet metal flashing and trim materials away from uncured concrete and masonry. Protect strippable protective covering on sheet metal flashing and trim from exposure to sunlight and high humidity, except to extent necessary for period of sheet metal flashing and trim installation.

g) Unload, store, and install sheet metal flashing materials and fabrications in a manner to prevent bending, warping, twisting, and surface damage.

h) Place materials in area protected from weather immediately upon delivery to project site.

i) Store above ground on blocking and cover with waterproof covering and provide adequate ventilation.

j) Do not store seasoned materials in damp or wet area.

k) Protect sheet materials from corner breakage and surface damage while handling.

l) Protect treated materials from high humidity.

m) The contractor shall maintain existing utilities indicated to remain and protect them against damage during the works.

n) Damages caused by demolition and renovation operations shall be repaired by the contractor at no additional cost to the Government.

o) The contractor shall transport from site all debris, rubbish, and materials resulting from demolition operations and dispose offsite on a daily basis in accordance with local regulations.

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7. Project Conditions:

a) Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit product installation and related work to be performed according to manufacturer's written instructions and warranty requirements.

1) Install self-adhering sheet underlayment within the range of ambient and substrate temperatures recommended by manufacturer.

2. Proceed with roofing installation only after substrate construction, vent stacks and other roof penetrating work has been completed.

3. Substrate shall be smooth, dry, securely anchored, and free of construction debris.

8. Execution of Work:

a) Do not disturb portions of project site beyond areas in which the Work is indicated.

Construction zones shall be fenced, barricaded, and/or marked with COR approved construction barrier fencing, plastic, chalked, and/or portable fencing before any construction activity. The fencing and/or markings shall define the construction zone and confine activity to the minimum area required for construction. All protection measures shall be clearly stated in the construction documents, and workers will be instructed to avoid conducting activities beyond the construction zone as defined by the construction zone fencing or markings.

a) Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

i) Examine roof sheathing/battens to verify that sheathing joints are supported by framing and blocking and that installation is within flatness tolerances.

ii) Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and completely anchored and that provisions have been made for flashings and penetrations through wood roofing.

iii) Replace all rotten and deteriorated deck boards and battens. Record quantities with photographs daily.

a) Remove no more existing roofing than what can be covered in one day by new roofing and so that building interior remains watertight and weathertight. Proceed by removing the exisitng roofing material, flashings, and roof accessories down to substrate, as specified.

b) The Contractor shall fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry. Erect and maintain fencing, barricades, lights, signals, and warning signs in accordance with MUTCD-2003.

c) Parking of vehicles shall be limited to existing roads, in legally designated areas, and within approved staging area(s).

d) Coordinate construction efforts with the COR such that there is minimal impact to the work of NPS personnel, other contractors and the visiting public.

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e) The Contractor shall allow for Government occupancy of project site, and keep roadways clear and available to the Government, Government's employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials.

f) The Contractors are advised to review the material specifications and scope of work. The Contractor should visit and walk through the site to familiarize themselves with the site conditions to understand the exact quantum of work.

9. Site Clearance and Cleanup

a) The Contractor shall clear away all debris and excess materials accumulated at the site and dispose of it away from Park premises, maintaining a neat site condition. On completion of project, Contractor shall remove all surplus materials and leave the site in a broom clean condition. Clean all areas around the building perimeter, cleaning to include collection of all nails.

10. Workmanship

a) Workers working on the site shall be skilled in their job and have related job experience.

b) The quality of all work shall be the responsibility of the Contractor. Inspect and test all work as needed to ensure that the quality of materials, workmanship, construction, finish, and functional performance is in compliance with applicable specifications and drawings. Quality Control Daily Reports shall be completed by the Quality Control Supervisor. Test reports shall be completed by person performing the test.

11. Working Hours:

a) Working hours shall be from 7:00 A.M. to 5:00P.M Monday thru Friday. No work shall be done Saturdays, Sundays and holidays without the prior approval of the COR.

12. Safety Measures

a) While on Park Property Provide the following:

i. First aid supplies

ii. Personal protective equipment that meets the requirements of NIOSH and MSHA

iii. Emergency instructions, including telephone numbers and reporting instruction for ambulance, physician, hospital, fire department and park police. Place in conspicuous locations at the worksite

iv. Adequate egress at all times in accordance with the Life Safety Code (NFPA 241)

v. Hard hats for all employees and for up to 6 visitors

vi. Designate and post signs in all hard hat areas

b) Provide training for first aid and lift safety.

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c) Performing tasks that create hazards for workers. The requirements listed below are minimum requirements.

d) Safety glasses will be worn while performing the following

i. Drilling

ii. Chiseling, chipping

iii. Wood working, metal working

iv. Hearing protection will be worn for all those who operate loud power tools and equipment.

v. Hard hats will be worn in areas where falling objects are a hazard.

vi. Gloves will be worn for cleanup and removal of work area waste and materials.

vii. Proper footwear will be worn by all workers, including safety shoes.

e) The contractor will identify a safety officer for each project responsible for the following:

i. Use of Signs and Barriers

ii. Barriers and signs shall identify workplace hazards and special instructions.

iii. Minimum space required to perform work shall be identified.

f) Waste cleanup and removal

i. All excess or waste materials will be removed from the site at the close of each work day.

ii. Debris will be removed to include food bags and containers. Staging of materials shall be in an agreed upon location.

iii. Ribbon, tape, fencing or portable barriers will create a controlled area around work site.

g) Electrical issues

i. All power cords and power taps will be wired appropriately, leaving no exposed wires that are live or could come in contact with staff.

ii. While working on electrical systems proper lockout/tag-out procedures will be followed, and the circuit being worked on will be de-energized (turned off at the main breaker).

iii. Power cords and temporary power will be GFCI protected and shall not be placed in areas that are prone to flooding or are wet, (i.e. running through puddles on the floor).

iv. Equipment will be plugged into a standard GFCI-protected receptacle and not wired directly into power taps.

13. Warranty

a) Special Materials Warranty: Manufacturer's warranty administered by CSSB and on CSSB's standard form in which the Manufacturer agrees to repair or replace CSSB-labeled products that fail in materials within specified warranty period. Material failures include manufacturing defects that result in leaks. Special Product-Defect Warranty: Submit a written warranty, signed by shake manufacturer, ensuring that shingles, when installed according to manufacturer's written instructions, will remain free of leaks and agreeing to

Page 13 of 13 Pages furnish replacement shakes or refund a pro-rata portion of the amount originally paid for the defective shakes due to original product defects, for the specified warranty period.

i) Roof Shingle Warranty Period: 25 years from date of Substantial Completion from Cedar Shingle manufacturer.

ii) Roof Shingle Warranty Period: 30 years for fire retardant treatment. Suppliers and Fire Treatment by Specialists to provide warranty and to work together to achieve warranty periods set out in this specification in accordance with CSSB warranty program.

iii) Wall Shingle Warranty Period: 25 years’ warranty against wood rot from date of Substantial Completion from Cedar Shingle manufacturer.

b) The contractor shall guarantee that all work performed will be free from all defects in workmanship and materials and that all installation will provide the capacities and characteristics specified. The contract further guarantees that if, during a period of three years from the date of the certificate of completion and acceptance of the work, any such defects will be repaired by the contractor at his expenses. Failures include, but are not limited to, the following:

i) Structural failures.

ii) Loose parts.

iii) Wrinkling or buckling.

iv) Failure to remain weathertight, including uncontrolled water leakage.

v) Deterioration of metals, metal finishes, and other materials beyond normal weathering, including non-uniformity of color or finish.

c) A warranty of 24 months will be provided for all workmanship and hardware.

See attachment #3 for photos and drawings