Section_J_Att_002_-_Specifications.pdf

CONTRACT SPECIFICATIONS

2021 Parkwide IDIQ Roofing Contract

Yosemite National Park Mariposa, CA

Sequoia and Kings Canyon National Park Three Rivers, CA

National Park Service

RFP No. 140P8621R0011 Section J - Attachment No. 002

TABLE OF CONTENTS

DIVISION 1 - GENERAL REQUIREMENTS

01110 Summary of Work…………………………………………………………………………………..3 01270 Definition of Contract Line Items…………………………………………………………………...5 01330 Submittals……………………………………………………………………………………….…..9 01360 Accident Prevention………………………………………………………………………….….…13 01430 Contractor Quality Control………………………………………………………………….……...17 01770 Project Closeout…………………………………………………………………………….……...22

DIVISION 6- WOOD AND PLASTICS

06100 Rough Carpentry and Log Work…………………………………………………………….……..24

DIVISION 7 – THERMAL AND MOISTURE PROTECTION

07220 Roof and Deck Insulation…………………………………………………………….……….……28 07311 Asphalt Shingles………………………………………………………………………………....…31 07312 Cedar or Sugar Pine Shake Roof………………………………………………………………….. 34 07313 Wood Shingle Roof………………………………………………………………………………...37 07510 Built-Up Roofing…………………………………………………………………………………..41 07570 Sprayed Polyurethane Foam Roofing………………………………………………………………44 07600 Flashing and Sheet Metal including Gutter…….…………………………………………………..48 07610 Sheet Metal Roofing……………………………………………………………………………….52

SECTION 01110

SUMMARY OF WORK

PART 1 GENERAL

1.1 DESCRIPTION

A. This project involves the replacement of roofs on National Park Service buildings and houses throughout Yosemite National Park (YOSE), Sequoia and Kings Canyon National Park (SEKI), and El Portal, CA. This includes removal of the existing roof and installation of new roofing materials & associated components to provide a complete and leak-proof roofing system. Additional work includes deteriorated roof structure repair, fascia replacement, sheathing replacement, gutter system replacement, and removal/replacement of roof mounted equipment that must be moved to permit roofing work.

B. The Period of Performance for this contract will be as stated in each task order.

C. All work will be performed under task orders assigned to the contract.

1.2 LOCATION

A. Refer to each task order for work locations.

1.3 CONTRACTOR'S USE OF PREMISES

A. Construction Camp: Establishment of a camp within the park will not be permitted.

B. Contractor shall at all times conduct their operations to ensure the least inconvenience to the public. Building closures will be permitted, when required, upon specific approval of Contracting Officer.

C. Confine storage of materials to the immediate vicinity of the job site.

D. Preservation of Natural Features: Confine all operations to limits shown for the project.

Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval.

Consult with Contracting Officer and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guy wires to existing trees.

E. Hauling Restrictions: Comply with all legal load restrictions in the hauling of materials.

Load restrictions on park roads are identical to the state load restrictions with such additional regulations as may be imposed by the Park Superintendent. Information regarding rules and regulations for vehicular traffic on park roads may be obtained from the Office of the Park Superintendent. A special permit will not relieve Contractor of liability for damage which may result from moving of equipment.

1.4 SPECIAL CONSTRUCTION REQUIREMENTS

A. Some locations may be inaccessible at times due to seasonal road closures. Winter weather may inhibit or completely preclude work. The Contractor shall take seasonal weather changes into account when planning and developing an approved Schedule.

Work subject to seasonal closures shall have priority in scheduling work to be completed.

B. Work hours shall be 7:00 AM to 4:30 PM Pacific Daylight-Saving Time. No weekend or holiday work is authorized.

1.5 FIELD VERIFICATION

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products.

1.6 CONSTRUCTION MATERIALS

A. All materials shall be Contractor furnished from outside the Park.

PART 2 PRODUCTS NOT USED.

PART 3 EXECUTION NOT USED.

END OF SECTION

SECTION 01270

DEFINITION OF CONTRACT LINE ITEMS

1.1 DESCRIPTION

A. The intent of this section is to explain, in general, what is and what is not included in a contract line item, and the limits or cut-off points where one item ends, and another begins.

B. If no contract line item exists for a portion of the work, include the costs in a related item.

1.2 CONTRACT LINE ITEM NO. 001- Remove & Replace Rafters, Ridge, & Other Roof Structure Repairs

A. This item consists of repairing any roof structure damage exposed when the original roof is removed. Types of structural repairs may include rafters, ridge, heavy decking, and purlin replacement.

B. Measurement will be made by the board foot of area repaired or replaced.

C. Payment will be by the board foot of area repaired or replace. Contractor bid for this item shall include labor and material cost plus markup.

1.3 CONTRACT LINE ITEM 002- Remove & Replace Fascia

A. This item consists of removing and replacing any damaged fascia.

B. Measurement will be made by the board foot of fascia replaced.

C. Payment will be by the board foot of fascia replaced. Contractor bid for this

1.4 CONTRACT LINE ITEM 003- Remove & Replace Skip Sheathing

A. This item consists of removing and replacing any damaged skip sheathing exposed when the original roof is removed.

B. Measurement will be made by the square foot of skip sheathing replaced.

C. Payment will be by the square foot of skip sheathing replaced. Contractor bid for this

1.5 CONTRACT LINE ITEM 004- Remove & Replace Plywood Sheathing/ Deck, ½” to ¾”

A. This item consists of removing and replacing any damaged plywood sheathing exposed when the original roof is removed. Plywood from ½” to ¾” thick is included in this line item.

B. Measurement will be made by the square foot of plywood replaced.

C. Payment will be by the square foot of plywood replaced. Contractor bid for this item shall include labor and material cost plus markup.

1.6 CONTRACT LINE ITEM 005- Install roof or deck insulation.

A. This item consists of installing a 2" rigid foam insulation system on top of the roof sheathing prior to installing a new roofing system.

B. Measurement will be by the square foot of insulation installed.

C. Payment will be by the square foot of insulation installed. Contractor bid for this

1.7 CONTRACT LINE ITEM 006 – Install ventilating underlayment for wood shingle roofing

A. This item consists of installing a breathable underlayment on top of the roofing felt prior to installing a new wood shingle roofing system, when solid sheathing in present.

B. Measurement will be by the square foot of underlayment installed.

C. Payment will be by the square foot of underlayment installed. Contractor bid for this item shall include labor and material cost plus markup.

1.8 CONTRACT LINE ITEMS 007 THRU 012 & 014- Remove existing roofing system and install new roofing systems of multiple types.

A. This item consists of removing all the existing roofing system and installing the new roofing system of the specified type.

B. Measurement will be by the square (100 square feet) of roof removed and replaced.

C. Payment will be by the square of roof removed and replaced. Contractor bid for this item shall include labor and material cost plus markup.

1.9 CONTRACT LINE ITEM 013- Install gutter system.

A. This item consists of removing the existing gutter system and replacing it with a new seamless gutter system and appurtenances or, if specified, installation of a seamless gutter system and appurtenances where no gutter system exists.

B. Measurement will be by the lineal foot of gutter system and appurtenances installed.

C. Payment will be by the lineal foot of gutter system and appurtenances installed. Contractor bid for this item shall include labor and material cost plus markup.

1.10 CONTRACT LINE ITEM 015- Removal and replacement of roof mounted solar water heating units.

A. This item consists of removing and replacing roof mounted solar water heating units that must be moved to accomplish roofing work. This work must be performed by a qualified Solahart solar water heater servicing vendor. The contractor shall notify the NPS 7 days in advance of scheduled work requiring crane services. All crane services must be properly coordinated with the NPS.

Each solar water heating unit must be removed and reinstalled, so it is completely functional within one working day to ensure hot water service for building tenants.

B. Measurement and payment for this line item will be by each solar water heating unit removed and replaced.

PART 2 PRODUCTS NOT USED.

END OF SECTION

SECTION 01330

SUBMITTALS

1.1 DESCRIPTION

A. The work of this section consists of submittal requirements before and during construction.

1.2 SUBMITTAL AND APPROVAL PROCEDURES

A. All submittals shall be transmitted using National Park Service form DSC-1(CS), dated 11/95. No action will be taken on a submittal item unless accompanied by the transmittal form.

B. As specified in the individual sections, forward submittals to Contracting Officer at least 30 days before need for approval. Unless a different number is specified, submit one reproducible original and two copies of each shop drawing, three copies of manufacturer's catalog sheets (cut sheets), three specimens of each sample, and three copies of all other submittals requested.

1. Shop Drawings: Include the following information with each copy of shop drawings:

a. Date.

b. Date of revisions (when applicable).

c. Contractor's certification that shop drawing has been checked for compliance with contract documents.

d. Details of fabrication, assembly and erection including connections and engagement to contiguous work.

e. Materials used.

f. All required dimensions.

g. The term "by others" shall not be used. All work to be performed by others shall be identified by Contractor or subcontractor name, discipline, or trade.

2. Samples: Samples shall be large enough to illustrate clearly the functional characteristics and full range of color, texture, or pattern.

3. Manufacturers' Catalog Sheets: Submit only pertinent pages; mark each copy of standard printed data to identify specific products proposed for use.

4. Manufacturer's Installation Instructions: When contract documents require compliance with manufacturer's printed instructions, provide one complete set of instructions for Contracting Officer and keep another complete set of instructions at the project site until substantial completion.

5. Documentation of carpenter's qualifications and experience. Experience working with logs is preferred.

C. Contracting Officer reserves the right to require submittals in addition to those called for in individual sections.

D. Approved Equals:

1. For each item proposed as an "approved equal," submit supporting data, including:

a. Drawings and samples as appropriate.

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

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

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

e. 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.

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

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

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

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

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

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

3. Construction Materials: The Contractor is encouraged to submit for approval products made from recycled or environmentally responsible material. Every effort will be made by the National Park Service to approve these materials.

E. Coordinate all submittals and review them for legibility, accuracy, completeness, and compliance with contract requirements. Forward submittals that are related to or affect one another as a package to facilitate coordinated review. Each transmittal shall contain only data specific to that individual submittal.

F. Submittal Identification:

1. Project submittal identification shall be applied by the Contractor. Identification shall include the park name, package number, project title, contract number, and transmittal number.

2. All sets of shop drawings, manufacturer's catalog sheets, samples, and other documents submitted to the Contracting Officer must have the identification information on the submittal.

3. Identification information shall be applied to the bottom right margin on each page.

Identification information on samples shall be applied to the most readily visible area on the sample or on tags attached to sample.

G. Submittal Numbering:

1. Number each submittal consecutively.

2. For re-submittals use the original submittal number, plus a letter suffix beginning with A.

3. Additional re-submittals of the same item shall contain the original number with the next consecutive letter.

H. Contracting Officer's Review:

1. Submittals will be returned disapproved without technical review if identification information is missing, not filled in, or if placed on the back of the submittal; an incorrect number or format of submittals is provided; the transmittal form is incorrectly filled out; submittals are not coordinated; or submittals do not show evidence of Contractor's approval.

2. Any work done or orders for materials or services placed before approval shall be at the Contractor's own risk.

3. After reviewing submittals, the Contracting Officer will return one copy of form DSC- 1(CS) and one copy of applicable (marked up) submittal sheets to the Contractor. Shop drawing review notations will be returned on the reproducible original shop drawing. All other submitted items will be retained. The Contractor is responsible for producing additional copies for his/her own use.

4. The returned submittal will be marked in one of three ways as defined below:

a. APPROVED: Acceptable with no corrections.

b. APPROVED WITH NOTATIONS: Minor corrections or clarifications required. All comments are clear, and no further review is required. The Contractor shall address all review comments when proceeding with the work.

c. DISAPPROVED - RESUBMIT: Rejected as not in accordance with the contract or as requiring major corrections or clarifications. The Contracting Officer will identify the reasons for disapproval. The Contractor shall revise and resubmit with changes clearly identified.

SECTION 01360

ACCIDENT PREVENTION

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

1.2 SUBMITTALS

A. Accident Prevention Program: Before on-site work begins, submit for approval an accident prevention program. The Contracting Officer will review the proposed program for compliance with OSHA and project requirements. If the program requires any revisions or corrections, the Contractor shall resubmit the program within 10 days. No progress payments will be made until the program is approved. The program shall include:

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

2. Weekly and monthly safety meetings.

3. First aid procedures.

4. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to ensure property protection and safety of the public, National Park Service personnel, and Contractor's employees. Identify the work included under each phase by reference to specification section or division numbers.

5. Training, both initial and continuing.

6. Planning for possible emergency situations, such as floods, fires, cave-ins, slides, explosions, power outages, and windstorms. Such planning shall take into consideration the nature of construction, site conditions, and degree of exposure of persons and property.

7. Housekeeping.

8. Fire Protection.

B. Submit a copy of test reports, as required by OSHA, for personnel working with hazardous materials.

C. Submit a report of safety meetings and of inspections.

D. Upon request, submit proof of employees' qualifications to perform assigned duties in a safe manner.

1.3 QUALITY ASSURANCE

A. Clauses entitled "Accident Prevention" and "Permits and Responsibilities" of the contract.

In case of conflicts between Federal, state, and local safety and health requirements, the most stringent shall apply. Equipment or tools not meeting OSHA requirements will not be allowed on the project sites. Failure to comply with the requirements of this section and related sections may result in suspension of work.

B. Qualifications of Employees:

1. Ensure that employees are physically qualified to perform their assigned duties in a safe manner.

2. 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.

3. Operators of vehicles, mobile equipment, hoisting equipment, and hazardous plant equipment shall be able to understand signs, signals, and operating instructions, and be capable of operating such equipment. Provide operating instructions for all equipment. Newly hired operators shall be individually tested by an experienced operator or supervisor to determine if they are capable of safely operating equipment.

1.4 ACCIDENT REPORTING

A. Reportable Accidents: A reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, property damage by accident in excess of $100, and fires. Notify Contracting Officer immediately in the event of a reportable accident.

Within 7 days of a reportable accident, fill out and forward to Contracting Officer an Accident/Property Damage Report (Form CM-22). Form may be obtained from the Contracting Officer.

B. All Other Accidents: The Contractor shall report all other accidents to the Contracting Officer and the Contracting Officers’ Representative as soon as possible and assist the Contracting Officer and other officials as required in the investigation of the accident.

PART 2 PRODUCTS

2.1 FIRST AID FACILITIES

A. Provide adequate facilities for the number of employees and the type of construction at the site.

2.2 PERSONNEL PROTECTIVE EQUIPMENT

A. Meet requirements of NIOSH and MSHA.

2.3 BARRIERS

A. See applicable roofing sections.

PART 3 EXECUTION

3.1 EMERGENCY INSTRUCTIONS

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

3.2 EGRESS

A. Provide and maintain adequate egress at all times in accordance with the Life Safety Code (NFPA 101). No corridor, aisle, stairway, door, or exit shall be obstructed or used in a manner that interferes with egress.

3.3 PROTECTIVE EQUIPMENT

A. Inspect personal protective equipment daily and maintain in a serviceable condition. Clean, sanitize, and repair, as appropriate, personal items before issuing them to another individual.

B. Inspect and maintain other protective equipment and devices before use and on a periodic basis to ensure safe operation.

3.4 SAFETY MEETINGS

A. As a minimum, conduct weekly 15-minute "toolbox" safety meetings. These meetings shall be conducted by a foreman and attended by all construction personnel at the worksite.

B. Conduct monthly safety meetings for all levels of supervision. Notify the Contracting Officer of meeting dates and times. These meetings shall be used to review the effectiveness of the Contractor's safety effort, to resolve current health and safety problems, to provide a forum for planning safe construction activities, and for updating the accident prevention program. The Contracting Officer or the Contracting Officers’ Representative will attend the meeting and enter the results of the meetings into the daily log.

3.5 HARD HATS AND PROTECTIVE EQUIPMENT AREAS

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

B. It is the Contractor's responsibility to require all those working on or visiting the site to wear hard hats and other necessary protective equipment at all times. As a minimum, provide six hard hats for use by visitors. Change liners before reissuing hats.

3.6 TRAINING

A. First Aid: Provide adequate training to ensure prompt and efficient first aid.

B. Hazardous Material: Train and instruct each employee exposed to hazardous material in safe and approved methods of handling and storage. Hazardous materials are defined as explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful substances that could cause death or injury.

PART 4 MEASUREMENT AND PAYMENT

4.1 NOT USED.

SECTION 01430

CONTRACTOR QUALITY CONTROL

A. The work of this section consists of preparing and executing a Quality Control Program.

1.2 RELATED REQUIREMENTS

A. "Inspection of Construction" clause of the contract.

1.3 SUBMITTALS

A. Quality Control Plan:

1. After contract award and before the Pre-Construction conference, submit for approval a written Contractor Quality Control (CQC) plan.

2. If the plan requires any revisions or corrections, the Contractor shall resubmit the plan within 10 days.

3. The Government reserves the right to require changes in the plan during the contract period as necessary to obtain the quality specified.

4. No change in the approved plan may be made without written concurrence by the Contracting Officer.

5. The plan shall include:

a. A list of personnel responsible for quality control and assigned duties. Include each person's qualifications.

b. A copy of a letter of direction to the Contractor's Quality Control Supervisor outlining assigned duties.

c. Methods of performing, documenting, and enforcing quality control of all work.

d. Methods of monitoring and controlling environmental pollution and contamination as required by regulations and laws.

B. Contractor's Quality Control Daily Reports: Submit showing all inspections and tests on the first workday following the date covered by the report. Utilize the forms attached at the end of this section.

C. CQC Accessibility Inspection Report: Submit report not later than three calendar days after the inspection was performed.

D. Off-Site Inspection Reports: Submit prior to shipment.

E. If the CQC plan and Quality Control Daily Reports are not submitted as specified, the Contracting Officer may retain all payments until such time a plan is accepted and implemented, or may retain payments for work completed on days there are no Quality Control daily reports.

1.4 QUALITY ASSURANCE

A. General:

1. The quality of all work shall be the responsibility of the Contractor.

2. Inspect 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.

3. Quality Control Daily Reports shall be completed by the Quality Control Supervisor.

B. Quality Control Staff:

1. The Contractor's Quality Control Supervisor may also perform the duties of Project Superintendent.

2. The Contractor's designated Quality Control Supervisor shall be on the project site whenever contract work is in progress.

3. The Contractor's job supervisory staff may be used to assist the Quality Control Supervisor supplemented, as necessary, by additional certified testing technicians.

3.1 ON-SITE CONTROL

A. Notification:

1. Notify the Contracting Officer at least 48 hours in advance of the preparatory phase meeting.

2. Notify the Contracting Officer at least 24 hours in advance of the initial and follow-up phases.

B. Preparatory Phase: Perform before beginning each feature of work.

1. Review control submittal requirements with personnel directly responsible for the quality control work. As a minimum, the Contractor's Quality Control Supervisor and the foreman responsible for the feature of work shall be in attendance.

2. Review all applicable specifications sections and drawings related to the feature of work.

3. Examine the work area to ensure that all preliminary work has been completed.

4. Verify all field dimensions and advise the Contracting Officer of discrepancies with contract documents.

5. Ensure that necessary equipment and materials are at the project site and that they comply with approved shop drawings and submittals.

6. Document all preparatory phase activities and discussions on the Contractor's Quality Control Daily Report.

C. Initial Phase:

1. As soon as work begins, inspect a representative portion of a particular feature of work for quality of workmanship.

2. Document all initial phase activities and discussions on the Contractor's Quality Control Daily Report. Exact location of initial phase shall be indicated for future reference and comparison with follow-up phases.

D. Follow-Up Phase: Inspect and test as work progresses to ensure compliance with contract requirements until completion of work.

E. Additional Preparatory and Initial Phases: Additional preparatory and initial phases may be required on the same feature of work for the following reasons:

1. Quality of on-going work is unacceptable.

2. Changes occur in the applicable quality control staff, on-site production supervision, or work crew.

3. Work on a particular feature of work is resumed after a substantial period of inactivity.

3.2 DOCUMENTATION

A. Maintain Quality Control Daily Reports of quality control activities.

B. Quality Control Daily Reports may not be substituted for other written reports required under clauses of the contract, such as Disputes, Differing Site Conditions, or Changes.

3.3 ENFORCEMENT

A. The Contractor shall stop work on any item or feature pending satisfactory correction of any deficiency noted by the quality control staff or the Contracting Officer.

CONTRACTOR'S QUALITY CONTROL DAILY REPORT

REPORT NO. _________ SHEET 1 OF _________

PROJECT

CONTRACT NO.

DATE

PARK

CONTRACTOR'S REPRESENTATIVE ON THE JOB

WEATHER (Rain, Snow, Cloudy, Windy, etc.)

RAINFALL

Inches

TEMPERATURE GROUND CONDITIONS (Dry, Damp, Wet, Frozen, etc.)

MAX.

MIN.

1. PRIME CONTRACTOR

NO. EMPLOYEES BY JOB CATEGORIES Hours HEAVY EQUIPMENT ON

JOB

NO.

UNITS

HRS. WORKING

YES NO Comments

WORK PERFORMED BY PRIME CONTRACTOR:

MATERIALS DELIVERED OFFICIAL VISITORS TO SITE

2A. SUBCONTRACTOR _____________________________________________: (If more than one subcontractor use copies of following page.)

NO. EMPLOYEES BY JOB CATEGORIES Hours HEAVY EQUIPMENT ON

JOB

NO.

UNITS

WORK PERFORMED BY SUBCONTRACTOR:

3. SPECIFIC INSPECTIONS: (Inspections performed, results, and corrective actions)

4. TESTING: 1 Check if any testing was performed today. (Complete and attach Test Report Information Sheets.)

Type and Location of Testing: ____________________________________________________________________________________

5. VERBAL INSTRUCTION RECEIVED FROM GOVERNMENT ON CONSTRUCTION DEFICIENCIES OR RE-TESTING

REQUIRED:

6. REMARKS:

7. CERTIFICATION:

I certify that the above report is complete and correct and that I, or my authorized representative, have inspected all work performed this day by the prime contractor and each subcontractor and determined that all materials, equipment, and workmanship are in strict compliance with the plans and specifications except as may be noted above. ____________________________________________________________ Contractor's Quality Control Representative

SUBCONTRACTOR WORK CONTINUED:

CONTRACT NO. REPORT NO. _______

SHEET ____ OF ____

2 SUBCONTRACTOR:

NO. EMPLOYEES BY JOB CATEGORIES Hours HEAVY EQUIPMENT ON

JOB

NO.

UNITS

2 SUBCONTRACTOR:

JOB

NO.

UNITS

JOB

NO.

UNITS

JOB

NO.

UNITS

YES NO COMMENTS

SECTION 01770

PROJECT CLOSEOUT

PART 1 GENERAL

1.1 DESCRIPTION

A. The work of this section consists of final cleanup, closeout submittals, and final inspection procedures.

PART 2 PRODUCTS

2.1 CLEANING MATERIALS

A. As recommended by the manufacturer of surface to be cleaned.

PART 3 EXECUTION

3.1 CLEANING

A. Before scheduling the final inspection, remove all tools, equipment, surplus materials, and rubbish. Restore or refinish surfaces that are damaged due to work of this contract to original condition. Remove grease, dirt, stains, foreign materials, and labels from finished surfaces.

Pick up all construction debris from the site. At time of final inspection, project shall be thoroughly clean and ready for use.

3.2 CLOSEOUT SUBMITTALS

A. Submit before final inspection request.

1. Guarantees and Bonds: As specified in individual sections.

3.3 SUBSTANTIAL COMPLETION AND FINAL INSPECTION

A. When project, or designated portion of project, is substantially complete, request in writing a final inspection. Upon receipt of written request that project is substantially complete, the Contracting Officer will proceed with inspection within 10 days of receipt of request or will advise the Contractor items that prevent the project from being designated as substantially complete.

B. If, following final inspection, the work is determined to be substantially complete, Contracting Officer will prepare a list of deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion. Contractor shall complete the work described on the list of deficiencies within 30 calendar days, as weather permits. If the Contractor fails to complete the work within this time frame, the Contracting Officer may either replace or correct the work with an appropriate reduction in the contract price or charge for reinspection costs in accordance with the Inspection of Construction clause of the contract.

C. If, following final inspection, the work is not determined to be substantially complete, Contracting Officer will notify Contractor in writing. After completing work, Contractor shall request a new final inspection. All reinspection costs may be charged against the Contractor in accordance with the Inspection of Construction clause of the contract.

3.4 FINAL ACCEPTANCE OF THE WORK

A. After all deficiencies have been corrected, a Letter of Final Acceptance will be issued.

4.1 PROJECT CLOSEOUT

A. Payment will be included in the bid item to which this work relates.

SECTION 06100

ROUGH CARPENTRY AND LOG WORK

A. The work of this section consists of rough carpentry work. This section is included in the event that existing rough carpentry is deteriorated and new wood is required to restore a structurally sound roof. Log work may be included in rough carpentry requirements.

1.2 SUBMITTALS

A. As specified in Section 01330.

1.3 QUALITY ASSURANCE

A. Identify lumber and structural wood panels by official grade mark.

B. Lumber: Grade stamp containing, where applicable, symbol of grading agency, rules under which graded, mill number or name, grade of lumber, species or species grouping, and condition of seasoning.

C. Plywood: APA grade trademark, including type, grade, class, identification or span rating, and inspection and testing agency mark.

1.4 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Store materials a minimum of 6 inches above ground in area protected from weather.

Protect with waterproof covering allowing adequate air circulation. Do not store seasoned materials in wet or damp environments.

PART 2 PRODUCTS

2.1 LUMBER

A. PS-20-94.

1. Moisture Content: 19 percent maximum (dry) at time of manufacture for lumber 2 inches or less in thickness.

2. Match existing lumber to the fullest extent possible.

3. Dimensions: All dimensions are nominal.

4. Species: Match existing.

5. Structural:

a. Load-Bearing Studs: Stud grade, Standard grade, or No. 3 grade.

b. Joists and Rafters: No. 2 or better grade.

c. Beams, Posts, and Timbers: No.2 or better grade.

d. All Other Structural Lumber: No. 2 or better grade.

6. Non-Structural:

a. Non-load-Bearing Studs, Plates, Bracing, and Nailers: Stud grade.

b. Blocking and Miscellaneous Lumber: Utility grade.

c. Furring, Grounds, Bracing, and Bridging: Standard grade.

2.2 PLYWOOD

A. PS 1-95.

1. Roof Sheathing: APA Rated Sheathing EXT.

2.3 WOOD DECKING

A. Match existing.

2.4 BUILDING PAPER

A. Asphalt-Saturated Felt: ASTM D226-94, Type I (No. 15), nonperforated.

2.5 VENTILATING UNDERLAYMENT

A. Three-dimensional Nylon Matrix: Cedar BreatherTM, manufactured by Benjamin Obdyke, Horsham, PA or approved equal. Application where there is a wood roof and solid sheathing for aid in weathering of shingles.

2.6 WOOD TREATMENT

A. Preservative: Provide treated wood for all framing, blocking, furring, nailing strips built into exterior masonry walls, wood in contact with masonry walls, wood in contact with concrete, wood nailers used with built-up roofing, and as shown.

2.7 ROUGH HARDWARE

A. Duplicate existing hardware to the fullest extent possible.

B. Unless otherwise specified, use galvanized or aluminum hardware for exterior use and stainless steel for fire-retardant treated wood.

C. Plywood Panel Clips: ASTM B221-96, 6063-T6, extruded aluminum alloy.

D. Miscellaneous Hardware: Provide nails, spikes, screws, bolts, nuts, washers, anchors, and similar items of type, size, and strength required to secure members rigidly in place.

E. Bar or Strap Anchors: ASTM A525-91A, 16-gauge.

2.8 NON-COMMERCIAL WOOD MATERIALS AND LOGS

A. Non-commercial materials will be provided by the NPS.

1. Non-commercial materials including, but not limited to; rafter and ridge logs.

Log materials will be limbed, rough sized, and transported to the job site by the NPS.

Barking, shaping, final fit and installation shall be completed by the contractor.

2. The contractor shall determine the rough sizes and quantities of non-commercial materials required for repairs and communicate the need to the NPS Historic Preservation Shop supervisor. The NPS will deliver the requested non-commercial materials to the job site within seven working days. The contractor shall proceed with work on other structures pending delivery of the non-commercial materials.

PART 3 EXECUTION

3.1 CONDITION OF SURFACES

A. Verify that surfaces to receive rough carpentry materials are prepared to exact grade and dimensions.

3.2 GENERAL INSTALLATION

A. Install rough carpentry work in accordance with 1997 UBC.

B. Consult with the YOSE Historic Preservation Shop or designated SEKI Maintenance Representative for direction in commercial and non-commercial material installation on historic structures. Log work shall be overseen by the YOSE Historic Preservation Shop or designated SEKI Maintenance Representative.

C. All work shall be directed and/or accomplished by trained, qualified, experienced, journeyman rough carpenters and log craftsmen.

D. Set rough carpentry to required levels and lines, with members plumb and true to line, cut and fitted.

E. Fit rough carpentry to other construction; scribe and cope as required for accurate fit. Correlate location of furring, nailers, blocking, grounds, and similar supports to allow attachment of other construction.

F. Securely attach rough carpentry work to substrate by anchoring and fastening.

3.3 FRAMING

A. Construct framing members full length without splice.

3.4 DECKING

A. Install new replacement decking in the same lay-up pattern as the existing decking and in accordance with AITC 112-81.

3.5 ROOF SHEATHING

A. Follow recommendations of APA. Install sheathing with face grain perpendicular to supports, and with end joints staggered and located over supports. Allow 1/8-inch space between panel ends and edges. Support edge joints with sheathing clips centered between each support.

4.1 ROUGH CARPENTRY

A. Payment will be by the unit stated in the bid schedule for this type of work.

SECTION 07220

ROOF AND DECK INSULATION

A. The work of this section consists of furnishing and installing roof and deck insulation.

1.2 QUALITY ASSURANCE

A. The following manufacturers have been determined to have products which meet the requirements of this section. Apache Foam Products Company, Linden, New Jersey; The Celotex Corporation, Tampa, Florida; Johns-Manville Corporation, Denver, Colorado.

Products from other manufacturers will be considered, provided they are approved as equal.

1.3 SUBMITTALS

A. As specified in Section 01330.

B. Samples: 2-foot length of insulation board.

C. Manufacturer's Data: Manufacturer's literature, specifications, and installation instructions for insulation board and adhesive.

1.4 PRODUCT HANDLING

A. Deliver materials in manufacturer's original, unopened protective packaging. Store, where directed, off the ground. Keep insulation materials dry.

1.5 JOB CONDITIONS

A. Verify that surfaces are in suitable condition. Correct unsuitable surfaces or notify Contracting Officer. Do not begin work until sheathing repair is complete.

B. Do not lay more insulation than can be completely covered with roofing materials the same day.

C. Do not lay insulation when temperature is below 45 degrees F.

PART 2 PRODUCTS

2.1 INSULATION BOARD

A. FS HH-I-583B, Type I, Grade 2, Class 2. Rigid urethane foam sandwiched between skins of asphalt-saturated roofing felt. Compressive strength, ASTM D1621-73. Manufacturer's standard size.

2.2 SHEATHING PAPER

A. Red rosin, 6-pound.

2.3 NAILS

A. Large head galvanized roofing nails. For nailable decks, use integral flat caps a minimum of 1 inch across.

2.4 ADHESIVE

A. As recommended by insulation manufacturer.

2.5 ANCHORS

A. As recommended by insulation manufacturer.

2.6 ASPHALT PRIMER

A. FS SS-A-701B.

2.7 ASPHALT

A. FS SS-A-666D, type required for incline of roof.

2.8 FELT

A. FS HH-R-595B, Type 15A, Style A.

2.9 CANT STRIPS

A. As needed.

2.10 EDGE STRIPS AND GRAVEL STOPS

A. As needed.

2.11 NAILING STRIPS

A. As needed. Treat wood by pressure process approved by AWPA. Creosote or other oil-based preservatives are not acceptable.

3.1 PREPARATION

A. Deck shall be firm, dry, clean, and properly graded to all outlets. Secure a wood strip of same thickness as insulation adjoining all eaves to act as a stop for insulation.

3.2 INSTALLATION - NAILABLE DECKS

A. Cover deck with one layer of rosin sheathing paper, lapping a minimum of 1 inch; nail in place.

B. Apply one layer of felt, overlapping 6 inches; nail through laps at 6-inch centers and down longitudinal center of each felt using two rows of nails spaced 10 inches apart and staggered on 18-inch centers. Use nails or fasteners as recommended or appropriate to type of deck.

Turn felt up, but do not cement, on all vertical surfaces to height of 6 inches. Overhang of felt at roof edges, 6 inches.

C. Apply units of insulation with long joints continuous and short joints staggered. Place long edges of insulation at right angles to boards of deck. Mop full width under each unit using hot asphalt at a minimum rate of 30 pounds per square per layer on insulation. Apply asphalt at temperatures between 350- and 425-degrees F.

D. Before application of roofing, turn projecting 6 inches of felt over insulation at all edges and vertical surfaces; mop solidly with asphalt.

E. Prior to installation of a nailed-on roofing system, install and fasten appropriately sized sheathing material over insulation. Sheathing shall be correct thickness to assure roofing materials will be securely fastened when applied.

1.2 ROOF AND DECK INSULATION

SECTION 07311

ASPHALT SHINGLES

1.2 DESCRIPTION

A. The work of this section consists of furnishing and installing an asphalt shingle roof.

1.2 SUBMITTALS

A. As specified in Section 01330.

B. Manufacturer's catalog cuts and installation recommendations.

C. Samples: Furnish three of each of the following:

1. Underlayment: Full roll width by 1-foot length.

2. Roll Roofing: 1-foot by 1-foot sample of each color selected.

3. Shingles: Strip of each color selected in each style selected.

1.3 PRODUCT HANDLING

A. Deliver shingles in manufacturer's original, unopened, protective packaging. Comply with manufacturer's recommendations for protection.

1.4 QUALITY ASSURANCE

A. Follow recommendations of ARMA Residential Asphalt Roofing Manual, 1988 edition.

1.5 GUARANTEE

A. Furnish a written 30-year minimum warranty on shingles and a 2-year guarantee against a defective roofing system, including repairing to maintain a watertight condition. Before beginning work, report to Contracting Officer if any specification requirements conflict with shingle manufacturer's warranty requirements.

PART 2 PRODUCTS

2.1 ROOFING FELT

A. ASTM D226-89, 15-pound, unperforated.

2.2 ROLL ROOFING

A. ASTM D249-89, 90-pound mineral surfaced.

2.3 SHINGLES

A. Self-sealing, fiberglass base, UL Class A, meeting ASTM D3018-90, Type I, or ASTM D3462-87; meeting UL Standard 997-89 for wind resistance rating.

2.4 FASTENERS FOR SHINGLES

A. Roofing nails, hot dipped galvanized, 11-gauge or 12-gauge, 1-1/4-inch-long barbed shanks with 3/8-inch to 7/16-inch diameter heads.

2.4 METAL EDGING

A. 28-gauge galvanized steel angle, 3 inches on roof and 3/8-inch vertical leg.

2.6 EAVES FLASHING

A. Flexible waterproof membrane, Ice and Water Shield, manufactured by Grace Construction Products Division, W. R. Grace and Company, Cambridge, Massachusetts, or approved equal.

3.1 PREPARATION

A. Strip all existing roofing. Load and dispose of material at an appropriate disposal site outside of YOSE or SEKI.

3.2 INSPECTION

A. Surface to which the roofing is to be applied shall be even, smooth, sound, clean, and dry.

Notify the NPS of any roof sheathing or other structure materials that require replacement on any historic structure. The NPS will replace deteriorated materials on any historic within 2 workdays or modify the contract to include repairs. Do not begin roofing work until surface deficiencies have been corrected.

3.3 DRIP EDGE

A. Install at eaves and rakes using roofing nails 9 inches on center.

3.4 FELT UNDERLAYMENT

A. Center a 36-inch width in each valley and tack in place. Then beginning at edge of roof, lay felt parallel to eaves and lap each course 2 inches over underlying course. Lap ends 4 inches and stagger end laps 6 feet minimum. Lap felts 6 inches onto valley and lap the felt 6 inches from both sides over all hips and ridges. Where roof meets a vertical surface, carry underlayment 4 inches up the surface; tack felt in place.

3.5 EAVES FLASHING

A. Apply one width of 36-inch-wide membrane flashing according to manufacturer's recommendations.

3.6 VALLEY FLASHING

A. Center 36-inch-wide strip of roll roofing in valley, mineral side up, and tack in place.

3.7 ROOF PENETRATION FLASHING

A. Install preformed metal flashing under shingles on upslope and on top of shingles on downside. Do not try to conceal downside of flashing.

3.8 LAYING SHINGLES

A. Snap horizontal and vertical chalk guidelines on underlayment, then lay shingles following manufacturer's instructions. Construct valleys as closed, cut or woven. Construct hips and ridges from units cut from the strip shingles.

3.9 INSTALLATION OF FALL PROTECTION ANCHOR(S)

A. Install minimum of two (ea) permanent fall protection anchor(s) on the roof surface, as per manufacturer’s instructions.

4.1 ASPHALT SHINGLES

A. Payment will be by the unit stated in the bid schedule for this type of work.

SECTION 07312

CEDAR OR SUGAR PINE SHAKE ROOF

A. The work of this section consists of installing a cedar or sugar pine shake roof. The contractor shall supply all required materials.

1.2 RELATED WORK

A. Flashings and valley metal - Section 07600.

1.3 SUBMITTALS

A. As specified in Section 01330.

1.4 QUALITY ASSURANCE

A. Grading Rules of the Cedar Shingle and Shake Bureau (CSSB).

1.5 GUARANTEE

A. Furnish a guarantee-warranty in writing against a defective roofing system for 5 years from date of acceptance. Guarantee-warranty shall include repairing if necessary, to maintain roof in a watertight condition.

PART 2 PRODUCTS

2.1 SHAKES

A. Sugar Pine shakes, 32" to 36", depending on exposure. Width 5 1/4" to 5 1/2", 1/4" to 3/8" thick. This is a commercial item that must be fabricated from Sugar Pine trees indigenous to the area.

1. Available through: Jim Armstrong, owner Armstrong Hand Split Shakes 25601 State Highway 108 Long Barn, CA 95436

B. Cedar shakes: No. 1 Grade Crete-Split Red Cedar, 24-inch (match existing roof), medium resawn.

C. Shake fire resistant treatment rating shall be Class B.

2.2 HIP AND RIDGE UNITS

A. Construct with sugar pine shakes for sugar pine roofs.

B. Prefabricated units complying with CSSB Grading Rules. Length: same as shakes.

2.3 ROOFING FELT

A. ASTM D226-89, Type II (30-pound), unperforated, asphalt saturated felt.

2.4 NAILS

A. Hot-dipped zinc coated box nails.

2.5 VENTILATING UNDERLAYMENT

A. Three-dimensional nylon matrix, Cedar Breather ™, manufactured by Benjamin Obdyke, Horsham, PA or approved equal, where solid sheathing is present.

2.6 EDGE BOARD

A. Match existing if present.

PART 3 EXECUTION

3.1 PREPARATION

A. Strip all existing roofing. Load and dispose of material at an appropriate disposal site outside of YOSE or SEKI.

3.2 INSPECTION

A. Surface to which the roofing is to be applied shall be even, smooth, sound, clean, and dry.

Notify the NPS of any roof sheathing or other structure materials on any historic structure that require replacement prior to starting repairs. The NPS will replace deteriorated materials on any historic structure within 2 workdays or modify the contract to include the repairs.

Do not begin roofing work until surface and structural deficiencies have been corrected.

B. Repairs- see Section 06100.

3.3 NAILING

A. Use two nails per shake, located approximately 1 inch from edge on each side, and 1 inch above the butt line of the course to follow. Nails shall be long enough to penetrate 1/2 inch into sheathing. Adjust length selected to accommodate thickness of material being nailed;

i.e., use longer nails on starter courses, hips and ridges. Drive nails flush but not into shake surface. Pneumatic nailing is permitted utilizing full head nail. Staples are not permitted.

3.4 LAYING SHAKES

A. Space shakes approximately 1/2 inch apart. Lay shake butts in straight lines, with exposure of 9 to 12 inches (replicate original roof). Stagger joints between adjacent courses. For applications not covered by this section, install shakes according to CSSB Design and Application Manual, 1987.

1. First and second course: Replicate original roof or consult with YOSE Historic Preservation Shop or SEKI designated Maintenance Representative for direction.

3.5 GABLE ENDS

A. Replicate original roof.

3.6 VALLEYS

A. Replicate original roof.

3.7 HIPS AND RIDGES

A. Replicate original roof.

3.8 INSTALLATION OF METAL FLASHINGS FOR PIPES

A. Install flashings on top of shakes on downhill side. Do not try to conceal the downhill side of flashings.

3.9 INSTALLATION OF FALL PROTECTION ANCHOR(S)

manufacturer’s instructions.

4.1 SUGAR PINE SHAKE ROOF

SECTION 07313

WOOD SHINGLE ROOF

A. The work of this section consists of furnishing and installing a wood shingle roof.

1.2 SUBMITTALS

A. As specified in Section 01330.

B. Submit samples of shingles.

1.3 QUALITY ASSURANCE

A. Grading rules of the Cedar Shingle and Shake Bureau (CSSB).

1.4 GUARANTEE

A. Furnish a guarantee-warranty in writing against a defective roofing system for 5 years from date of acceptance. Guarantee-warranty shall include repairing if necessary, to maintain roof in a watertight condition.

PART 2 PRODUCTS

2.1 SHINGLES

A. Certigrade No. 1 Blue Label 16, 18, or 24"-inch-long Red Cedar shingles (duplicate original roof materials)

B. Shingle fire resistant treatment rating shall be Class B.

2.2 HIP AND RIDGE UNITS

B. Prefabricated units complying with CSSB Grading Rules or construct with roofing shingles.

Length, same as shingles.

2.3 NAILS

A. Hot-dipped zinc coated box nails. Use 3d nails in field of roof and 5d for hips, ridges, and starter course.

2.4 ROOFING FELT STRIPS

A. ASTM D226-89, Type I or II, 15-pound or heavier, unperforated, asphalt saturated felt.

2.5 VENTILATING UNDERLAYMENT

A. Three-dimensional nylon matrix, Cedar Breather ™, manufactured by Benjamin Obdyke, Horsham, PA or approved equal; where solid sheathing is present.

2.6 ROSIN PAPER

A. Rosin sized, unsaturated paper weighing approximately 6 pounds per 100 square feet.

2.7 EDGE BOARD

A. Install only if present on original roof. Duplicate original edge board.

2.8 FLASHING AND VALLEY METAL

A. Section 07600.

PART 3 EXECUTION

3.1 PREPARATION

A. Strip all existing roofing. Load and dispose of material at an appropriate disposal site outside of YOSE or SEKI.

3.2 INSPECTION

A. Surface to which the roofing is to be applied shall be even, smooth, sound, clean, and dry.

Notify the NPS of any roof sheathing or other structure materials that require replacement on any historic structure. The NPS will replace deteriorated materials on any historic structure within 2 workdays or modify the contract to include the repairs. Do not begin roofing work until surface deficiencies have been corrected.

B. Repairs- see Section 06100.

3.3 NAILING

A. Use two nails per shingle, located 1 inch from the edge of shingle at each side and 1 inch above the butt line of the course to follow. Verify that nails are just long enough to penetrate sheathing. Drive nails flush, but not into shingle surface.

3.4 LAYING SHINGLES - GENERAL

A. For applications not covered in this section, install shingles according to CSSB Design and Application Manual, 1987.

B. Substrate: Lay shingles directly on wood deck. Use no felt underlay or interlay.

C. Spacing: Space shingles 1/4 to 3/8 inch apart.

D. Exposure: straight coursing: 5-1/2 to 7 1/2 inches (duplicate existing roof). Staggered coursing: every other shingle has alternating exposure of 7 1/2" and 5 1/2"

E. Lines- Straight coursing: Lay shingle butts in straight lines. Check lines frequently.

Staggered coursing: see D. above.

F. Side Lap: Stagger joints between adjacent courses at least 1-1/2 inches.