Attachment_1_-_A06_Specifications.pdf

HERBERT HOOVER NATIONAL HISTORIC

SITE

WEST BRANCH, IOWA

HAYHURST HOUSE AND STAPLES HOUSE ROOF

REPLACEMENT AND PAINTING

PMIS 247880

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

APRIL 2021

TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

Section 01 10 00 - Division 01 Short Form General Requirements

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

Section 07 31 13 – Asphalt Shingles

DIVISION 09 - FINISHES

Section 09 91 13 – Painting

PHOTOGRAPHS

SECTION 01 10 00

DIVISION 1 SHORT FORM GENERAL REQUIREMENTS

PART 1 – GENERAL

ITEM 1 - DESCRIPTION OF WORK

1.1 Background: The Hayhurst House and the Staples (both are Historic Structures) are located at Herbert Hoover National Historic Site (HEHO) in West Branch Iowa. The properties are listed on the National Register of Historic Places. Both houses are two story wood framed houses with a cedar shingle roofs with wooden ridge cap. Peak height is approximately 25 feet and roof pitch is approximately 10/12.

Both houses may be occupied by National Park Service (NPS) staff.

1.2 Work Covered by the Contract Documents:

A. Project Location: National Park Service, Hayhurst House Historic Structure, Herbert Hoover National Historic Site, 110 Parkside Drive, West Branch, IA 52358.

B. Work consists of: A. Removal and replacement of the existing wood shingle roof on the Hayhurst House (HS-10) and the Staples House (HS-09)

1. Remove, dispose, and replace approximately 1200 square feet(12 squares) wood shingle roofing and 80 linear feet wood ridge cap(Hayhurst House) and remove, dispose of and replace approximately 1600 square feet(16 squares) wood shingle roofing and 100 linear feet wood ridge cap(Staples House).

2. Remove and replace approximately 80 linear feet(lf) of rain gutter on the Staples house. Remove and replace approximately 120 lf of rain gutter on the Hayhurst House.

3. Note – The standing seam metal roof on the Staples House shall remain and be protected from damage due to construction activity.

B. Wet scrape, spot prime and apply two coats of paint on exterior doors, windows and siding on Staples House.

1. Wet scrape, spot prime and apply two coats of paint to approximately 2800 square feet(sf) of wood siding on the Staples House, including two exterior doors and trim and approximately fifteen exterior window and trim on both levels.

C. All work will be performed under a single contract.

D. Period of performance: Work shall be completed within approximately 90 calendar days after Notice to Proceed. 50 days for submittals and material delivery and 40 days on site (POP is inclusive of 3 weather days) for final completion.

JBissaillon Highlight

ITEM 2 - EXISTING UTILITIES

2.1 Existing Utilities: Notify Contracting Officer's Representative (COR) and utility companies of proposed locations and times for excavation.

2.2 Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government. If damage occurs to an unknown utility, repair utility. An equitable adjustment will be made in accordance with the Changes clause of the contract.

2.3 Water service shall be maintained throughout construction.

2.4 Existing Utility Interruptions: Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

2.4.1 Notify COR not less than two business days in advance of proposed utility Interruptions if work requires any temporary utility interruption.

2.4.2 Hours for Utility Shutdowns: Shut downs shall not exceed 2 to 3 hours. Temporary provisions will be needed by the Contractor for periods longer than stated allowance.

ITEM 3 - CONTRACTOR’S USE OF PREMISES

3.1 Conduct of Operations: At all times the contractor shall conduct his operations in conformance with the rules and regulations promulgated by the Secretary of the Interior for the National Park Service, and applicable park rules and regulations prescribed by the Park Superintendent.

A. No signs or advertisements (except those specified herein) shall be displayed on the construction site or within the park unless approved by the Contracting Officer (CO).

B. Smoking is not permitted within any Federal building or within 25 feet of entrances, operable windows, or outdoor air intakes.

C. Public Use of Site: Contractor shall at all times conduct operations to ensure the least inconvenience to the public. The Hayhurst House will remain occupied during the re-roofing effort.

The Staples House may be occupied. Both facilities are utilized by the Park for staff use only.

3.2 On-site work hours: Work shall be generally performed during normal business working hours of 8 a.m. to 5 p.m., Monday through Friday, except when otherwise indicated.

A. Work on Saturdays, Sundays, Federal holidays, early morning, or at night may not be performed without prior consent from the Contracting Officer. Submit requests for work outside of the stated normal business hours to the Contracting Officer for approval at least 48 hours in advance of the work.

3.3 Contractor Use of Site:

JBissaillon Highlight

A. General: Contractor shall have limited use of the site for construction operations. Limit use of premises to 30-feet around the immediate project buildings. Do not disturb portions of Project site beyond areas in which the Work is indicated.

B. Parking and Staging: The existing gravel parking area immediately west of the Staples House may be used by the Contractor for worker parking, material staging, and placement of satellite toilet. Coordinate use of parking area with COR.

C. Driveways and Entrances: Keep driveways, access roads, and entrances serving premises clear and available to Government, Government's employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials. Schedule deliveries to minimize use of driveways and entrances.

D. Security and Protection facilities installation:

1. Environmental Protection: Provide protection, operate temporary facilities, and conduct construction in ways and by methods that comply with environmental regulations and that minimize possible air, waterway, and subsoil contamination or pollution or other undesirable effects.

1. Cleaning of Equipment: The Contractor shall ensure that prior to moving on to the Project Area, all equipment, is free of soil, seeds, vegetative matter, or other debris that could contain or hold seeds. Ensure that all equipment has been pressure washed and is free of exotic species prior to start-up of operations and moving of equipment to Project Area. Equipment shall be considered free of soil, seeds, and other debris when a visual inspection does not disclose such material. Disassembly of equipment components or specialized inspection tools are not required.

2. Tree and Plant Protection: Provide Plant Protection during the scraping of lead based paint.

3. Pest Control: Follow NPS requirements and practices to minimize attraction and harboring of rodents, roaches, and other pests and to perform extermination and control procedures at regular intervals so Project will be free of pests and their residues at Final Completion. Perform control operations lawfully, using environmentally safe materials.

4. Temporary Enclosures: Provide temporary enclosures for protection of construction, in progress and completed, from exposure, foul weather, other construction operations, and similar activities. Provide temporary weathertight enclosure for building exterior.

3.4 Storage - Staging Areas:

A. Confine Storage of materials and equipment to the area designated by the Park – gravel parking lot west of the Staples House, approximate area capacity of 3 vehicles. Limits of use and control shall be subject to COR's approval. Schedule deliveries to minimize space and time requirements for storage of materials and equipment on-site.

3.5 Preservation of Natural Features: Both houses are historic structures and asset to the Park.

3.6 Hauling Restrictions: Match State and County road requirements for all park work/access.

3.7 Housekeeping:

A. Keep project neat, orderly, and in a safe condition at all times. Store and use equipment, tools, and materials in a manner that does not present a hazard. Immediately remove all hazardous rubbish. Do not allow rubbish to accumulate. Provide onsite containers for collection of rubbish and dispose of it at frequent intervals during progress of work.

B. Dispose of waste materials legally off NPS property.

3.8 Occupancy Requirements for Buildings:

A. Existing Buildings:

1. Full Government Occupancy: Government will occupy buildings that will be under construction during the entire contract period. Cooperate with Government during construction operations to minimize conflicts and facilitate Government usage. Perform the Work so as not to interfere with Government's day-to-day operations. Maintain existing exits, unless otherwise indicated.

a. Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities. Do not close or obstruct walkways, corridors, or other occupied or used facilities without written permission from the Contracting Officer.

b. Maintain existing building in a weather tight condition throughout construction period. Repair damage caused by construction operations. Protect building and its occupants during construction period.

3.9 Photo Documentation:

All photos shall be in focus, show maximum range of depth of field general photo and then close up detail photo as needed. Shall be in JPEG digital form and submitted via CD-R Archival Gold or DVD-R Archival Gold media with printed labels and 8 mega pixels minimum within 7 days from time of taken or as approved by COR.

A. Existing Condition Images: Before starting construction, take color, dated, digital images of project site and adjacent property/roads/etc. that may be impacted by construction activity/traffic.

Include existing items to remain or be salvaged from different vantage points and with context for location identification.

B. Construction Images:

1. Document all sub-surface work/ trenches etc. prior to backfill with enough overall field view to show location and then details.

2. Maintain organized index for photos with date, description, etc..

3. Additional images as needed when questions or emergency situations occur. Submit within 1 business day.

3.10 Fire and Life Safety:

At a minimum, conduct one weekly 15-minute "toolbox" safety meetings. These meetings shall be conducted by a foreman or supervisor and attended by all construction personnel at the worksite. Topics need to coincide with work scheduled for the following week. Document and submit meeting minutes to the Contract Specialist within one day after the meeting.

A. Comply with the requirements of NFPA 241 (Standard for Safeguarding Construction, Alteration, and Demolition Operations).

B. Store and handle hazardous materials in accordance with manufacturer’s and OSHA 29CFR1926 Subpart D requirements. Maintain readily available, on site, MSDS/Safety Data Sheets (SDS) for each chemical.

i. Immediately report all spills of hazardous materials to the COR.

ii. Maintain a spill emergency response kit.

iii. Train employees how to respond to a spill and use the emergency response kit.

3.11 Noise and Acoustics Management:

A. Noise Control: Perform demolition and re-roof operations to minimize noise. Perform noise-producing work in less sensitive hours of the day or week as approved by the COR.

B. Repetitive and/or intermittent, high-level noise: Permitted only during Daytime.

1. Do not exceed the following dB(A) limitations at 50 feet:

Sound Level in dB(A) Time Duration of Impact Noise 70 More than 12 minutes in any hour 80 More than 3 minutes in any hour

2. Maximum permissible construction equipment noise levels at 50 feet:

Power Equipment dB(A) MATERIALS HANDLING dB(A) Compressors 75 Pneumatic Tools 80 Pumps 75 Saws 75 Generators 75 Vibrators 75

C. Ambient Noise:

1. Maximum noise levels (dB) for receiving noise area at property line shall be as follows:

a. Residential receiving area :

Daytime: 65 dB Nighttime: 45 dB

b. Commercial/Industrial receiving area:

Daytime: 67 dB Nighttime: 65 dB

ITEM 4 - COMMENCEMENT, PROSECUTION, AND COMPLETION

4.1 The Contractor shall commence work in accordance with the terms and conditions of the contract.

(Block 11 of the SF 1442 and all relevant sections of the award documents)

ITEM 5 - EXAMINATION OF THE SITE

5.1 All offerors are urged to visit the job site and examine existing conditions before submitting offers.

All offerors will be held to have the same knowledge concerning the site and the on ground conditions as if they had inspected the job site. No change orders will be approved for work obvious during a site visit.

Please see FAR 52.236-27 - Site Visit (Construction).

ITEM 6 - ABBREVIATIONS

6.1 The list of abbreviations, which may be used in the Construction Specifications or Special Provisions, refer to the organizations and specifications of the organizations may be found at the below https://www.nps.gov/orgs/1671/do-business-with-us.htm

ITEM 7 - ACCIDENT PREVENTION

7.1 Description: The work of this section consists of establishing and implementing an effective accident prevention program and providing a safe environment for all personnel and visitors.

A. It is the Contractor's responsibility to require all those working on or visiting the site to wear hard hats and other necessary personal protective equipment in good repair at all times. At a minimum, maintain four hard hats and all other APP required equipment.

7.2 Submittals:

A. Accident Prevention Program: At the pre-construction conference, submit for approval a site specific accident prevention program. The Plan shall be written to comply with OSHA and project requirements (a generic plan is not acceptable) including but not limited to the following:

1. Name and qualifications of responsible supervisor to carry out the program

2. First aid and rescue procedures. Provide current certification for first aid/CPR of designated individual.

3. Training, both initial and continuing.

4. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to provide for property protection and safety of the public, National Park Service personnel, and Contractor's employees. Identify the work included under each phase, with a Job Hazard Analysis (JHA)/Job Safety Analysis (JSA), etc.

5. Planning for possible emergency situations, such as explosions, fires, floods, power outages, and wind storms. Such planning shall take into consideration the nature of construction, site conditions, and degree of exposure of persons and property.

6. Contractor to identify nearest location of medical facility for emergencies

7. Recognition that work will be performed in remote areas with limited communication or cell phone coverage.

8. Supplemental hazard specific plans may be required IAW 29 CFR 1926 or 1910.

B. Meeting and Inspection Reports: Safety Meetings: As a minimum, conduct 15 minute "toolbox" safety meetings. These meetings shall be conducted by site superintendent or foreman and attended by all construction personnel at the worksite. Submit a report of safety meetings and inspections. The Contractor shall document the “toolbox” meetings through the daily logs.

7.3 Qualification of Employees:

A. Ensure that employees are physically qualified to perform their assigned duties in a safe manner to include operators of vehicles and equipment. .Provide operating instructions for all equipment. .

B. Do not allow employees to work whose ability or alertness is impaired because of drugs, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

7.4 Accident Reporting: The Contractor shall report all accidents to the COR and Contracting Officer as soon as possible and assist the COR, Contracting Officer and other officials as required in the investigation of the accident.

7.5 First Aid Facilities: Provide adequate facilities for the number of employees and appropriate to the hazards associated with the types of ongoing construction work at the site.

7.6 Emergency Instructions: Post telephone numbers and reporting instructions for ambulance, physician, hospital, fire department, and police in conspicuous locations at the work site.

7.7 Personal Protective Equipment (PPE): It is the Contractor's responsibility to require all those working on or visiting the site to wear necessary protective equipment at all times.

A. PPE must meet requirements of applicable ANSI standards. Selection shall conform to OSHA 29CFR 1926 Subpart E.

B. B. A hard hat use area shall be designated by the Contractor. The hard hat area shall be posted by the Contractor in a manner satisfactory to the Contracting Officer.

C. C. It is the Contractor's responsibility to require all those working on or visiting the site to wear hard hats and other necessary PPE. All PPE will be serviceable at all times. At a minimum, maintain 2 sets of PPE including hard hats and all other Accident Prevention Plan required equipment.

7.8 Hazardous Materials: It shall be the responsibility of all operators and contractors functioning within the park to properly cleanup, mitigate and remediate if necessary, all unauthorized discharges of hazardous materials or non-hazardous chemical and biological products released from fleet and/or other support vehicles or stationary sources. Response shall be consistent with guidelines established by federal, state and local regulations, and as outlined within the operator's Safety or Hazardous Materials Business Plan.

A. If a spill, leak or other release occurs, the operator shall as soon as possible, without impeding cleanup, notify the National Park Service Emergency Dispatch and COR.

B. The existing paint on the Staples house contains lead ranging from <.1%(trim) to 23% (siding) by weight. All paint removal, collection, transportation and disposal shall be in compliance with State of Iowa Lead Abatement Regulations.

ITEM 8 - PRE-CONSTRUCTION CONFERENCE: See FAR

52.236-26 ITEM 9 - SUBMITTALS

9.1 General Submittal Procedures:

A. General: Prepare and submit submittals required by individual Specification Sections. Types of submittals are indicated in individual specific sections.

1. CM-16 Transmittal Form: All submittals shall be transmitted via electronic email using National Park Service form CM-16 form. The form will be provided by the Contracting Officer. No action will be taken on a submittal item unless accompanied by the CM-16 transmittal form. Submit to the Contracting Officer.

B. Submittal List: The intent is to provide an overall summary of submittal requirements and not a comprehensive list. The requirements of the individual Specification Sections, terms and conditions of the Contract still apply regardless of what is shown on the submittal list.

C. Pre-construction Conference Submittal: The following items shall be submitted a minimum of one week prior to the Pre-construction Conference. If all of these documents have not been received one week prior to the scheduled Pre-Construction Conference date, the conference will be cancelled, Notice to Proceed will not be issued, and the Contracting Officer will consider other contractual remedies. Work shall not commence until written Notice to Proceed has been issued. Contracting Officer will notify Contractor of tentative date for the Pre-Construction Conference:

1. Letter designating Project Superintendent.

2. Construction Schedule.

3. A comprehensive breakdown of the Schedule of Values.

4. Accident Prevention Plan (see section 7 of this document).

5. A list of Subcontractors for this project.

6. Written statements from subcontractors certifying compliance with applicable labor standard clauses (SF1413).

7. Satisfactory evidence of liability insurance coverage and workman’s compensation for the

Contactor and all subcontractors.

8. Waste Management Plan.

9. Quality Control Plan.

10. Historic Preservation Treatment Plan.

9.2 Submitted Product Content, Product Data, and Samples: Contracting Officer will provide sample cover sheet.

A. Submitted Product Content: Indicate shingle and paint products and other submittal requirement per each respective specification section.

1. Submit Shop Drawings according to Part 9.1 of this section to include one digital file (.PDF or .TIF) and two full size hardcopy documents to COR.

B. Product Data: Provide shingle and paint systems product data per respective specification sections.

1. Submit Product Data according to Part 9.1 of this section to include one digital file (.PDF or .TIF) to COR.

C. Samples: Submit 2 color samples 12” x 12” in size of actual paint finish color selected on wood.

1. Submit Samples CM-16 Transmittal Form according to Part 9.1 of this section to include one digital file (.PDF or .TIF) and physical samples of actual material to COR.

D. For submittals specified above, forward submittals to Contracting Officer at least 15 business days before need for approval.

E. After approving submittals, Contracting Officer will return one copy to the Contractor. If submittals are not approved, Contracting Officer will return all copies to Contractor with reasons for rejection. Resubmit, identifying changes. Any work done before approval shall be at Contractor's own risk.

9.3 Approved Equals: Refer to FAR 52.211-6 - If an item in this solicitation is identified as “brand name or equal” or lists more than 3 manufacturers, the purchase description reflects the characteristics and level of quality that will satisfy the Government’s needs. The salient physical, functional, or performance characteristics that “equal” products must meet are specified in the solicitation or relevant specification.

A. For each item proposed as an “approved equal,” submit supporting data, including:

1. Drawings and samples as appropriate.

2. Comparison of the characteristics of the proposed item with that specified.

3. Changes required in other elements of the work because of the substitution.

4. Name, address, and telephone number of vendor.

5. Manufacturer’s literature regarding installation, operation, and maintenance, including schematics for electrical and hydraulic systems, lubrication requirements, and parts lists. Describe availability of maintenance service, and state source of replacement materials.

B. A request for approval constitutes a representation that Contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to that specified.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

C. Approved Equals will be evaluated and approved/disapproved during the submittal process.

9.4 Progress Schedules: As soon as possible after Notice of Award and before beginning any work, submit Progress Schedule. Contracting Officer will review the Progress Schedule for format and content.

Submit four copies of Progress Schedule (normally in bar chart form) showing estimated starting and completion dates for each part of the work. The first progress payment will not be issued until an acceptable progress schedule is submitted. The following information must accompany submission of progress schedules prior to processing any pay application:

A. Daily/weekly progress reports during construction as part of the administration process.

B. Schedule of Values: Breakdown each lump-sum item into component work activities used in the schedule, for which progress payments may be requested. The Schedule of Values will form the basis for payment. The work activities broken out within the schedule of values shall be integrated into and made a logical part of the construction baseline schedule submitted under this specification. The total costs for the component work activities shall equal the contract price for that lump-sum item. The Contracting Officer may request data to verify accuracy of dollar values.

A sample Schedule of Values will be provided by the Contracting Officer.

ITEM 10 – TEMPORARY SERVICES

10.1 Description: The work of this section consists of providing temporary services required for Contractor's performance of the work of this Contract.

10.2 Fire Prevention and Protection:

A. Hazard Control: Take all necessary precautions to prevent fire during construction. Provide adequate ventilation during use of volatile or noxious substances.

B. Satellite Toilet: Provide appropriate sanitary services for all workers.

ITEM 11 - PROJECT CLOSEOUT

11.1 Description: The work of this section consists of final cleanup, closeout submittals, final inspection procedures, and safety precautions.

11.2 Cleaning: Remove all tools, equipment, surplus materials, and rubbish. At time of final inspection, project shall be thoroughly clean and ready for use.

11.3 Final Inspection: Submit written certification that project is substantially complete, and a final inspection must be requested to the Contracting Officer in writing. The Contracting Officer or designee will make an inspection within 10 days of receipt of request or at a mutually agreeable time.

A. If the work is determined to be substantially complete, following the final inspection, the.

Contracting Officer will prepare a Punch List and issue a Letter of Final Completion.

B. If the work is not determined to be substantially complete following the final inspection, the

Contracting Officer will notify Contractor in writing. Contractor shall request a new final inspection after completing the work. Re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction contract clause.

C. Contractor shall complete the Punch List within 30 calendar days, documented weather permitting.

D. If Contracting Officer determines that the work is not substantially complete; he will immediately notify Contractor in writing, stating reasons. After completing work, Contractor shall resubmit certification and request a new final inspection. Re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction contract clause.

E. If Contractor completes all items of work on the Punch List and all contractually required items, Contracting Officer will issue Letter of final acceptance of work.

F. If the Contractor fails to complete the work within the time frame, the Contracting Officer may correct the work with an appropriate reduction in contract price or charge for re-inspection costs in accordance with the Inspection of Construction contract clause.

G. Disposition of any permits and warranties required by the specifications in this section.

11.4 Acceptance of the Work: After all deficiencies have been corrected, a Letter of Acceptance will be issued. A Release of Claims document must be executed and submitted to the Contracting Officer before final payment can occur.

11.5 Warranties

A. Construction Warranty shall be based on date of Final Completion.

B. Provide All Warranty information of products installed organized by Division. All contact information, extents and conditions shall be clearly noted as well as date of overall project Substantial Completion.

C. Information shall include operation and maintenance manuals for each warranted material.

PART 2 – EXISTING PROJECT AREA PHOTOGRAPHS

2.1 Photographs of Existing Project Area

A. See representational photographs of the houses to receive work on the following pages.

Photographs do not display the entirety of the work to be conducted and the Contractor is expected to gain an understanding of the work to be completed in order to determine price, means and methods.

Hayhurst House East Elevation

Hayhurst House North Elevation

Hayhurst House West Elevation (Note: work to lower roof not included in this project.)

Hayhurst House Southeast Corner Elevation

Staples House East Elevation (Note: lower standing seam metal roof is not included in this project.)

Staples House North Elevation (Note: lower standing seam metal roof is not included in this project.)

Staples House South and Upper West Elevation (Note: lower standing seam metal roof is not included in this project. Note: passage door on left part of photo shall be scraped, primed, and painted.)

Staples House West Elevation (Note: lower standing seam metal roof is not included in this project. Note:

upper left corner damaged gutter is to be replaced to inside corner of house.)

END OF SECTION

HEHO 247880 APRIL 2021

WOOD SHINGLES 073129 - 1

SECTION 073129

WOOD SHINGLES

PART 1 - GENERAL

1.1 SCOPE OF WORK

A. Work consists of the following:

1. Full tear-off of roof system at areas indicated in Photographs provided.

a. Removal of existing roofing system down to existing roof deck.

2. Re-cover preparation of entire roof area where tear-off occurs, including installation of new roofing system.

3. Removal of flashings and counter flashings.

4. Removal and replacement of gutters and downspouts on the Staples House.

Replacement of 30’ of 5” half round galvanized gutter section and downspout attachment.

Reinstall existing downspouts.

5. Removal and replacement of gutters and downspouts on the Hayhurst house.

Replacement of 120’ of 5” half round galvanized gutter section and downspout attachments. Reinstall existing downspouts.

6. Removal and reinstalled of plumbing vents and boots in kind.

7. Temporary roofing during construction where required. Temporary roofing shall maintain the project roof is watertight and able to prevent leaks and damage to the building and structure until the reroofing work is completed. Contractor is to make sure that at the completion of work each day the projects roof is 100% watertight.

8. Remove and replace the existing wood shingle roof system and associated roof flashings, down to deck and patch any openings in the structural decking as required before installing the new roof system, associated metal roof flashings and trims. Replace existing roof gutters and downspouts. Factor a replacement of 200 s.f. total (100 s.f. per House) of roof sheathing material. Sheathing is 1x wood skip sheathing. Field verify plank width upon roof removal.

9. National Park Service (NPS) requires the existing roof decks to be walked after demolition has been completed with the Contracting Officer's Representative (COR) or designated Project Inspector prior to installation of any new roof materials to ascertain if any water penetration has caused deterioration or corrosion of the existing decks which are to remain. If there are areas of concern the COR may require the Contractor to perform pull out tests to determine if the existing decking in question can remain or if it will need to be replaced. This can include visible areas of water damage or insect related

WOOD SHINGLES 073129 - 2

damage. Testing and replacement of these types of unforeseen damaged areas will be by Change Order if required.

B. Roof Area:

1. Remove, dispose, and replace approximately 1200 square feet(12 squares) wood shingle roofing and wood ridge cap(Hayhurst House) and remove, dis-pose of and replace approximately 1600 square feet(16 squares) wood shingle roofing and wood ridge cap(Staples House).

2. Note the Contractor is encouraged to field verify roof dimensions prior to bidding.

1.2 SUMMARY

A. Section Includes:

1. Selective Demolition.

2. Wood roof shingles.

3. Sheet metal flashing and trim.

4. Gutter and downspouts.

5. Vents and plumbing boots.

1.3 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1.4 ACTION SUBMITTALS

A. Product Data: For the following:

1. Wood roof shingles.

2. Sheet metal flashing and trim.

B. Shop Drawings: For metal flashing and trim.

C. Samples: For each exposed product and color.

1.5 INFORMATIONAL SUBMITTALS

A. Sample warranty.

1.6 CLOSEOUT SUBMITTALS

A. Maintenance data.

1.7 SUBMITTAL COORDINATION

A. Submittals: The requirements of the individual Specification Sections, terms and conditions of the Contract still apply regardless of what is shown on the submittal list.

1.8 QUALITY ASSURANCE

A. All shingle installers shall have a minimum of 5 years of experience in installation of wood shingle systems.

WOOD SHINGLES 073129 - 3

B. Grading Agency Qualifications: An independent testing and inspecting agency recognized by authorities having jurisdiction as qualified to label wood products for compliance with referenced grading rules.

1.9 WARRANTY

A. Materials Warranty: Manufacturer's warranty administered by CSSB and on CSSB's standard form in which 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.

1. Materials Warranty Period: Limited lifetime from date of Final Completion.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Exterior Fire-Test Exposure: Provide roofing materials identical to those of assemblies tested for fire resistance in accordance with American Society of Testing Materials (ASTM) E108 or UL 790 by Underwriters Laboratories or another testing and inspecting agency acceptable to authorities having jurisdiction. Identify products with appropriate markings of applicable testing agency.

1. Wood Products: Class B.

a. Fire-Retardant Treatment: Exterior-type pressure treatment complying with American Wood Protection Association (AWPA) U1 and AWPA T1.

b. Accelerated Weathering: Subject test specimens to ASTM D2898 Method A before testing.

c. Identification: Attach a label to each bundle of wood products; include identification mark of testing agency acceptable to authorities having jurisdiction and identify manufacturer, chemical treatment, method of application, purpose of treatment, and warranties available.

B. Grading Rules: Provide wood products that comply with CSSB grading rules for products indicated.

1. Identification: Attach a label to each bundle of wood products that identifies manufacturer, type of product, grade, dimensions, and identification mark of grading agency acceptable to authorities having jurisdiction.

2.2 WOOD ROOF SHINGLES

A. Cedar Shingles: Smooth-sawn western red cedar shingles.

1. Grade: No. 1, with starter courses of No. 1.

2. Exposure:

a. Roof Slopes 3:12 to 4:12: 4-1/4 inches (110mm) maximum.

b. Roof Slopes 4:12 and Steeper: 5-1/4 inches (140mm) maximum.

3. Size: 18 inches (457 mm) long; 0.45 inch (11 mm) thick at butt.

WOOD SHINGLES 073129 - 4

B. Cedar Shingle Ridge Units: Manufactured, smooth-sawn western red cedar caps for ridges and hips of same thickness as shingles, 7 inches (178 mm) wide; beveled, alternately overlapped, and nailed.

1. Grade: No. 1.

2. Length: 16 inches (406 mm), or 18 inches (457 mm) as recommended for the roof application by the manufacturer.

2.3 ACCESSORIES

A. Roofing Nails: ASTM F1667, Type 316 stainless steel box-type wire nails, sharp pointed, and of sufficient length to penetrate a minimum of 3/4 inch (19 mm) into sheathing or to penetrate through roof sheathing less than 3/4 inch (19 mm) thick.

1. Where nails are in contact with metal flashing, use nails made from same metal as flashing.

2.4 SELECTIVE DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Full Roof Tear-off: Removal of existing roofing system down to existing roof deck or structure.

2. Temporarily protect existing roofing system and components that are to remain as required from damage.

3. Existing roof drains and roof drainage shall be protected during each stage of reroofing, and roof-drain plugs shall be installed when demolition is taking place so that debris cannot be lost down the drains. Contractor shall remove all drain plugs when demolition is completed in the area affecting the drain.

4. Do not remove more roof than can be replaced in a day, and the roof will be made watertight each night.

5. Remove debris and materials so as not to impose excessive loads on supporting roof, structure or framing.

6. Dispose of demolished items and materials promptly.

B. Removed and Reinstalled Items:

1. Clean and repair items to functional condition adequate for intended reuse.

2. Reinstall items in locations indicated, or in original locations as required. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

C. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition.

D. Inspect deck after tear-off of roofing system.

1. If broken or loose fasteners that secure deck panels to one another or to structure are observed, or if deck appears or feels inadequately attached, immediately notify COR.

a. Do not proceed with installation until directed by COR.

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2. If deck surface is unsuitable for receiving new roofing or if structural integrity of deck is suspect, immediately notify COR.

a. Do not proceed with installation until directed by COR.

E. Disposal of Demolished Materials:

1. General: Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indicated to remain NPS's property, remove demolished materials from Project site.

a. Do not allow demolished materials to accumulate on-site.

b. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

2. Burning: Do not burn demolished materials.

3. Disposal: Transport demolished materials off NPS's property and legally dispose of them.

F. Cleaning:

1. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

2.5 SHEET METAL FLASHING AND TRIM

A. Performance Requirements:

1. 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.

2. Sheet Metal Standard for Flashing and Trim: Comply with National Roofing Contractors Association’s (NRCA's) "The NRCA Roofing Manual" and Sheet Metal and Air Conditioning Contractors National Association’s (SMACNA's) "Architectural Sheet Metal Manual" requirements for dimensions and profiles shown unless more stringent requirements are indicated.

3. Single Ply Roofing Industry (SPRI) Wind Design Standard: Manufacture and install copings and roof edge flashings tested according to SPRI ES-1 and capable of resisting the following design pressure:

a. Design Pressure: 30 psf vertical design pressure.

4. 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.

B. Sheet Metal:

1. General: Protect mechanical and other finishes on exposed surfaces from damage by applying strippable, temporary protective film before shipping.

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2. Metallic-Coated Steel Sheet: Provide zinc-coated (galvanized) steel sheet according to ASTM A 653/A 653M, G90 coating designation or aluminum-zinc alloy-coated steel sheet according to ASTM A 792/A 792M, Class AZ50 coating designation, Grade 40;

prepainted by coil-coating process to comply with ASTM A 755/A 755M.

a. Surface: Smooth, flat.

b. Exposed Coil-Coated Finish:

1) Two-Coat Fluoropolymer. American Architectural Manufacturers Association (AAMA) 621. Fluoropolymer finish containing not less than 70 percent Polyvinylidene Fluoride (PVDF) resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

c. Color: As selected by COR from manufacturer's full range.

d. Concealed Finish: Pretreat with manufacturer's standard white or light-colored acrylic or polyester backer finish, consisting of prime coat and wash coat with minimum total dry film thickness of 0.5 mil.

C. Miscellaneous Materials:

1. General: Provide materials and types of fasteners, solder, protective coatings, sealants, and other miscellaneous items as required for complete sheet metal flashing and trim installation and as recommended by manufacturer of primary sheet metal or manufactured item unless otherwise indicated.

2. Fasteners: Wood screws, annular threaded nails, self-tapping screws, self-locking rivets and bolts, and other suitable fasteners designed to withstand design loads and recommended by manufacturer of primary sheet metal or manufactured item.

a. General: Blind fasteners or self-drilling screws, gasketed, with hex-washer head.

1) Exposed Fasteners: Heads matching color of sheet metal using plastic caps or factory-applied coating. Provide metal-backed Ethylene Propylene Diene Monomer (EPDM) or Polyvinyl Chloride (PVC) sealing washers under heads of exposed fasteners bearing on weather side of metal.

2) Blind Fasteners: High-strength aluminum or stainless-steel rivets suitable for metal being fastened.

b. Fasteners for Zinc-Coated (Galvanized) or Aluminum-Zinc Alloy-Coated Steel Sheet: Series 300 stainless steel or hot-dip galvanized steel according to ASTM A 153/A 153M or ASTM F 2329.

3. Sealant Tape: Pressure-sensitive, 100 percent solids, polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape 13 mm (1/2 inch) wide and 3 mm (1/8 inch) thick.

4. Elastomeric Sealant: ASTM C 920, elastomeric polymer sealant; of type, grade, class, and use classifications required to seal joints in sheet metal flashing and trim and remain watertight.

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

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

D. Fabrication General:

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1. General: Custom fabricate sheet metal flashing and trim to comply with details shown and recommendations in cited sheet metal standard that apply to design, dimensions, geometry, metal thickness, and other characteristics of item required. Fabricate sheet metal flashing and trim in shop to greatest extent possible.

a. Fabricate sheet metal flashing and trim in thickness or weight needed to comply with performance requirements, but not less than that specified for each application and metal.

b. Obtain field measurements for accurate fit before shop fabrication.

c. 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 hems.

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

2. Fabrication Tolerances: Fabricate sheet metal flashing and trim that is capable of installation to a tolerance of ¼ inch in 20 feet on slope and location lines indicated on Drawings and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.

3. Expansion Provisions: Form metal for thermal expansion of exposed flashing and trim.

a. Form expansion joints of intermeshing hooked flanges, not less than 25 mm (1 inch) deep, filled with butyl sealant concealed within joints.

b. Use lapped expansion joints only where indicated on Drawings.

4. Sealant Joints: Where movable, nonexpansion-type joints are required, form metal to provide for proper installation of elastomeric sealant according to cited sheet metal standard.

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

6. Fabricate cleats and attachment devices of sizes as recommended by cited sheet metal standard for application, but not less than thickness of metal being secured.

7. Seams: Fabricate nonmoving seams with flat-lock seams. Form seams and seal with elastomeric sealant unless otherwise recommended by sealant manufacturer for intended use.

E. Roof-Drainage Sheet Metal Fabrications:

1. Hanging Gutters: Fabricate to cross section required, complete with end pieces, outlet tubes, and other accessories as required. Fabricate in minimum 2400-mm- (96-inch-) long sections. Furnish flat-stock gutter brackets and gutter spacers and straps fabricated from same metal as gutters, of size recommended by cited sheet metal standard but with thickness not less than twice the gutter thickness. Fabricate expansion joints, expansion-joint covers, and gutter accessories from same metal as gutters. Shop fabricate interior and exterior corners.

a. Aluminum-Zinc Alloy-Coated Steel: 0.71 mm (0.022 inch) thick.

F. Miscellaneous Roof Sheet Metal Fabrications:

1. Roof-Edge Flashing and Cap Flashing: Fabricate in minimum 96-inch- long, but not exceeding 12-foot- long, sections. Furnish with 6-inch- wide, joint cover plates.

a. Joint Style: Butted with expansion space and 6-inch-wide, concealed backup plate.

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b. Fabricate from the Following Materials:

1) Aluminum-Zinc Alloy-Coated Steel: .0.024 inch thick.

2. Base Flashing: Fabricate from the following materials:

a. Aluminum-Zinc Alloy-Coated Steel: 0.024 inch thick.

3. Counterflashing and Flashing Receivers: Fabricate from the following materials:

a. Aluminum-Zinc Alloy-Coated Steel: 0.024 inch thick.

4. Roof-Penetration Flashing: Fabricate from the following materials:

a. Aluminum-Zinc Alloy-Coated Steel: 0.024 inch thick.

5. Vent-Pipe Flashings: ASTM B749, Type L51121, at least 1/16 inch (1.6 mm) thick.

Provide lead sleeve sized to slip over and turn down into pipe, soldered to skirt at slope of roof, and extending at least 4 inches (102 mm) from pipe onto roof.

PART 3 - EXECUTION

3.1 INSTALLATION OF METAL FLASHING AND TRIM

A. Examination:

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

a. Verify compliance with requirements for installation tolerances of substrates.

b. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and securely anchored.

c. Verify that air- or water-resistant barriers have been installed over sheathing or backing substrate to prevent air infiltration or water penetration.

2. Proceed with installation only after unsatisfactory conditions have been corrected.

B. General Installation:

1. General: Anchor sheet metal flashing and trim and other components of the Work securely in place, with provisions for thermal and structural movement. Use fasteners, solder, protective coatings, separators, sealants, and other miscellaneous items as required to complete sheet metal flashing and trim system.

a. Install sheet metal flashing and trim true to line, levels, and slopes. Provide uniform, neat seams with minimum exposure of solder, welds, and sealant.

b. 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.

c. Space cleats not more than 300 mm (12 inches) apart. Attach each cleat with at least two fasteners. Bend tabs over fasteners.

d. Install exposed sheet metal flashing and trim with limited oil canning, and free of buckling and tool marks.

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

f. Do not use graphite pencils to mark metal surfaces.

2. 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.

a. Coat concealed side of sheet metal flashing and trim with bituminous coating where flashing and trim contact wood, ferrous metal, or cementitious construction.

b. Underlayment: Where installing sheet metal flashing and trim directly on Cementitious or wood substrates, install underlayment and cover with slip sheet.

3. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at maximum of 3 m (10 feet) with no joints within 600 mm (24 inches) of corner or intersection.

a. Form expansion joints of intermeshing hooked flanges, not less than 25 mm (1 inch) deep, filled with sealant concealed within joints.

b. Use lapped expansion joints only where indicated on Drawings.

4. Fasteners: Use fastener sizes that penetrate substrate not less than recommended by fastener manufacturer to achieve maximum pull-out resistance.

5. 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.

6. Seal joints as required for watertight construction.

a. Embed hooked flanges of joint members not less than 1 inch into sealant.

b. Form joints to completely conceal sealant.

c. When ambient temperature at time of installation is between 40 and 70 deg F, set joint members for 50 percent movement each way. Adjust setting proportionately for installation at higher ambient temperatures.

d. Do not install sealant-type joints at temperatures below 40 deg F.

C. Roof-Drainage System Installation:

1. General: Install sheet metal roof-drainage items to produce complete…