Revised_-_SOW_-_DDPM_130011_-_Multi_Roof_Replacements_-_4_Sep_2014.pdf

NAVAL AIR STATION

JRB, FORT WORTH, TX

July 28, 2014

Revision #: 1 Revision Date: 4 Sep 2014

Statement of Work For:

Repair Roof Deficiencies: Buildings 1776, 1628, 3356, and 1790

Project # DDPM 130011

SCOPE OF WORK:

All approvals and coordination for this construction project shall be handled by the Contracting Officer (CO) or designated representative. The Contractor shall provide all equipment, material, technical expertise, manpower and other required resources to successfully accomplish the following scope of work.

1. Roof replacements for Buildings 1776, 1628, 3356, and 1790, located at the NAS Fort Worth JRB, TX.

1.1 At Building 1776, the sloped roof measures 4,324 SF or 48 Square (SQ) including the front and back awnings. The front awning measures 11’0” x 21’0” or 231 SF and the back awning measures 11’0” x 28’0” or 308 SF. The existing asphalt shingle roof shall be demolished and replaced with a similar asphalt shingle roofing system. Inspect and completely demolish A-frame front & back wood awnings. Remove and discard all rotted out wood framing material from both awnings. Install new red cedar wood framing material, wood roof sub-structure, and metal fasteners on both awnings. Coat all wood framing and roof sub-structure with a redwood weather resistant coating.

Remove and replace all metal gutters and downspouts. The Contractor shall use pre-finished 24 gauge metal for the gutters and 26 gauge metal for the downspouts. Note: The roofing substructure and asphalt shingles shall cover the entire awning. No openings or gaps shall be present. The insulation R-Value of the B1776 asphalt shingle roof shall be R-35. The material warranty on the asphalt shingle material shall be 20 years. The warranty on labor and workmanship shall be 5 years.

1.2 At Buildings 1628, the existing black colored Ethylene-Propylene-Diene- Monomer (EPDM) roofing system is to be demolished and replaced with a new Elastomeric Membrane Roofing system. The subcategory of Elastomeric Membrane Roofing system used will be an EPDM Rubber Roofing system that includes the following specifications and requirements:

− 60-mil-thick, 0.40 pounds per square foot (psf) membrane − Fully adhered with bonding adhesive

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− Top surface must be white in color − Single-ply roof construction − Use EPDM primer to spliced areas in conjunction with pre-applied seam tape − Fire retardant – Must meet Underwriters Laboratories (UL) and Factory Mutual (FM) fire classification − ENERGY STAR - qualified EPDM membrane − A ½” think gypsum sheathing shall be installed underneath the

EPDM roofing system − The insulation R-Value shall be R-35 − Contractor shall also inspect, repair, and replace roof sub-structure as needed − Material warranty shall be 20 years − Labor warranty shall be 5 years

Certain sections of the B1628 roof are surrounded by metal fascias. The Contractor shall demolish all existing metal fascias and replaced them with new metal fascias. The Contractor shall use pre-finished 26 gauge metal for all new fascias being installed at B1628.

Replace all metal gutters, downspouts, and copings at Building 1628. Use pre-finished 24 gauge metal for all gutters, 26 gauge metal for all downspouts, and 24 gauge metal for all copings.

The Contractor shall also remove and replace an 8’0” x 26’0” (208 SF/21 SQ) section of standing seam roofing located on the south end of B1628. Use pre-finished 26 gauge metal for the new standing seam roofing material.

1.3 At Building 3356, the existing 4-ply built up roof is to be demolished and replaced with a new Elastomeric Membrane Roofing system. The subcategory of Elastomeric Membrane Roofing system used will be the Ethylene-Propylene-Diene-Monomer (EPDM) Rubber Roofing system that includes the following specifications and requirements:

− Top surface must be white in color − Single-ply roof construction − USE EPDM primer to spliced areas in conjunction with pre-applied seam tape − Fire retardant – Must meet Underwriters Laboratories (UL) and Factory Mutual (FM) fire classification − ENERGY STAR – qualified EPDM membrane − A ½” think gypsum sheathing shall be installed underneath the

EPDM roofing system.

− The insulation R-Value shall be R-35

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− Contractor shall also inspect, repair, and replace roof sub-structure as needed

− EPDM roofing material shall run up the entire height of the parapet wall and cut flush at the top

− Install 24 gauge metal coping over the parapet wall

Replace all metal gutters, downspouts, and copings at Building 3356. Use pre-finished 24 gauge metal for all gutters, 26 gauge metal for all downspouts, and 24 gauge metal for all copings.

The current lightning protection system will be removed before roof demolition and reinstalled after the new EPDM roofing system is installed.

The Contractor will not be required to install a temporary lightning protection system during construction. However, the Contractor shall be responsible for recertifying the lightning system after reinstallation.

1.4 At Buildings 1790, the existing 4-ply built-up roof with aggregate roofing system shall be demolished and replaced with new Elastomeric Membrane Roofing systems. The subcategory of Elastomeric Membrane Roofing system used will be the Ethylene-Propylene-Diene-Monomer (EPDM) Rubber Roofing system that includes the following specifications:

− Top surface must be white in color − Single-ply roof construction − Use EPDM primer to spliced areas in conjunction with pre-applied seam tape − Fire retardant – Must meet Underwriters Laboratories (UL) and Factory Mutual (FM) fire classification − ENERGY STAR - qualified EPDM membrane − A ½” think gypsum sheathing shall be installed underneath the

EPDM roofing system.

− The insulation R-Value shall be R-35 − Contractor shall also inspect, repair, and replace roof sub-structure as needed

Replace all metal gutters, downspouts, and copings at Building 1790. Use pre-finished 24 gauge metal for all gutters, 26 gauge metal for all downspouts, and 24 gauge metal for all copings.

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According to the latest NAS JRB Fort Worth asbestos report dated September 2009, 10% chrysotile was found present underneath the flashings located at both expansion joints. Also, 3.25% chrysotile was found present in the paint covering the expansion joints. These expansion joints measure a total of 156 linear feet (LF). All joint compound and paint containing chrysotile/asbestos currently located at the B1790 roof expansion joints shall be abated and disposed of according to local, state, federal laws governing asbestos removal and disposal.

The B1790 roof replacement shall also include a 15’0” x 22’0” (330 SF/33 SQ) connector between buildings 1790 and 1792. The current roofing system is a 4-ply built-up roof and shall be replaced with an EPDM roofing system.

2. Contractor shall perform any associated work required to bring all roofs per Statement of Work into conformance with the 1.1 References Section of this Scope of Work. The associated work may include but is not limited to:

replacement of deteriorated roofing insulation, installation of roof hatch or building-attached exterior ladder for buildings over two stories, cant strips, coal tar bitumen, roof vents, flashing, perimeter drip edges if over wood decks, protective coatings for metal roofs, seam sealant, fasteners, snow guards, and lightning protection.

3. The estimated square footage for each affected building is provided in the following table. Note: The measurements provided are for reference purposes only, and will need to be field validated by the contractor prior to developing their proposal.

PART I – GENERAL

1.1 REFERENCES:

1.1.1 The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

UNIFIED FACILITIES CRITERIA (UFC)

UFC 3-110-03 Roofing

UFC 3-110-04 Roofing Maintenance and Repair and referenced

Applicable Documents

Building Number Building Gross SF User Gross SF 1776 4,679 4,324 1790 11,051 11,025 3356 5,609 5,609

1628 7,115 6,919

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UFC 3-800-10N Environmental Engineering for Facility Construction

INDUSTRY STANDARD GUIDANCE

National Roofing Contractors Association – Roof Repair Manual for Low

Slope Membrane Roof Systems

Metal Building Manufacturing Association Roofing Manual

ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise

Residential Buildings

ASHRAE 90.2 Energy-Efficient Design of Low-Rise Residential Buildings

CODE OF FEDERAL REGULATIONS (CFR)

29 CFR (PART 1910) Occupational Safety And Health Standards

29 CFR (PART 1926) Safety And Health Regulations for Construction

29 CFR (PART 1926.1101) Asbestos Safety and Health Regulations for

Construction

1.2 SUBMITTALS:

1.2.1 Drawings

The Contractor shall submit drawings and specifications describing the requirements for construction of the work to the CO for approval.

Contractor shall submit three (3) paper copies (D size, 22” x 34”) and one (1) electronic copy on CD ROM (CAD and PDF) of the roofing drawings before work is to start and after the project is complete in case any changes were made. Samples of roofing material to be used will be submitted for approval before work is to begin. Each of the two (2) submittals should include select (1628, 1776, 1790, & 3356) roofing drawings on D size, 22-in. by 34-in., indicating type of roofing system, roofing demolition plan, any roofing alterations, and joining, fastening, and sealing methods.

1.2.2 Provide material safety data sheets (MSDS) for all materials to be installed.

1.2.3 Provide samples of all roofing materials to be used before work is to begin. (Note: This requirement will also be listed on the submittal register.)

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1.2.4 The final submittal should include O&M documentation and a Manufacturer’s Warranty for the roofing material used. (Note: This requirement will also be listed on the submittal register.)

1.2.5 The Contractor shall complete all inspection and commissioning requirements prior to the Pre-Final inspection.

PART II − PRODUCTS

2.1 MATERIALS:

2.1.1 Material shall be as specified and approved by the CO before work is to begin. Material not definitely specified shall be of quality used for the purpose in commercial practice. Items not specified but required for the proper installation or repair of a specified item of work shall be provided.

Items shall be of the proper type, size and material for the use intended.

2.1.2 Contractor Furnished Materials: The Contractor furnished materials shall include all associated equipment and appurtenances required for performing the work and in accordance with the equipment manufacturer's literature.

PART III − EXECUTION

3.1 PREPARATION:

3.1.1 Scheduling and Coordination: Before commencing work on each roof, the

Contractor shall determine that all requirements pertaining to scheduling of the work, the time approved by Contract Surveillance for commencement of work, and the coordination with Contract Surveillance are being complied with. The Contractor shall further determine that all required notices have been given.

3.1.2 Scheduling and Sequence of Work: The work shall be completed to minimize interference with the normal functions of the Government activity. Certain areas will be vacated for a period of time as necessary for the Contractor to perform certain work; however, the remains of the building will be occupied during the course of the work. Prior to beginning any work, the Contractor shall meet with Contract Surveillance in order that an approved schedule and sequence of work may be arranged.

3.1.3 Interruption of Utilities Services: Interruptions shall be kept to a minimum and shall be at such times and duration as approved by the CO.

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3.1.4 Material, equipment, tools, and workmen shall be scheduled on the site in a timely manner to avoid delay in the work.

3.1.5. Materials shall be inspected to make certain they are in compliance with the specifications and are free from defects and damage.

3.1.6 Measurements: The contractor is responsible for validating all critical field measurements required for roof installation.

3.1.7 Protection required to prevent damage to adjacent areas, equipment, fixtures and finishes shall be provided. Damage to items while accomplishing the work shall be repaired or replaced with new items at no additional cost to the Government.

3.1.8 Existing Work: Protect existing work which is to remain in place, be reused, or remain the property of the Government. Repair items that are damaged during performance of the work to their original condition or replace with new.

3.1.9 Facilities: Protect electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities.

3.1.10 Dust and Debris Control: Prevent the spread of dust and debris to occupied portions of the building and avoid the creation of a nuisance or hazard in the surrounding area. Waste and debris resulting from the work being performed shall be cleaned up daily and promptly removed from the activity.

3.2 PERFORMANCE:

3.2.1 Workmanship: Skilled personnel shall execute in a careful, neat, and proficient manner and in compliance with accepted trade practices and prevailing industry standards. All work, including design, shall be executed in accordance with Unified Facilities Guide Specifications (UFGS), Uniform Building Code (UBC), OSHA standards, and specifically 29 CFR 1910 and 29 CFR 1926. All work on this contract shall comply with all Local, State, and Federal Environmental Laws.

3.2.2 As used herein, “replace” means provide new materials to replace existing or missing materials.

3.2.3 Minor Materials and Work: Minor materials and work not specifically mentioned herein but necessary for the proper completion of the specified work shall be furnished without additional cost to the Government.

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3.2.4 Unforeseen Major Repairs: Should deteriorated materials of a major nature be uncovered in the course of the work, it shall be brought to the attention of the CO. Repairs shall be made as directed, in writing, and an adjustment will be made in the contract price in accordance with the terms of the modifications.

3.2.5 Existing Work: Where existing work is changed or removed, or where new work adjoins, connects to, or abuts existing work, the existing work shall be altered as necessary and connected in a substantial and workmanlike manner. All new work shall match, as nearly as practicable, existing, adjoining, and/or adjacent similar work. Operations affecting existing work shall be conducted with care not to damage work in place, and all existing work damaged by such operations shall be rectified or replaced without additional expense to the Government.

3.2.6 Prior to beginning work, the contractor shall survey each roof and its condition. Contractor shall perform non-destructive analysis of roofs in accordance with the National Roofing Contractors Association (NRCA) manual before work is to begin. Prior to demolition, the Contractor shall identify any issues unrelated to the roof itself that may cause a new replacement roof to have similar problems. If no unrelated issues are determined, Contractor may proceed with replacing the new roof as identified in the previous sections.

3.2.7 Replaced roofs must meet the following performance standards:

a. Low Slope Roofs:

i. Thermal expansion design shall be for a minimum temperature difference of 150 degrees Fahrenheit

ii. Contractor must provide a dew point calculation to verify that vapor retarder has been positioned correctly in roof assembly.

b. Steep Slope Roofs:

i. For metal roofs the thermal expansion design shall be for a temperature difference of 200 degrees Fahrenheit.

ii. Determination of whether or not manufacturer’s high wind design and installation requirements apply based on ASCE 7.

c. Demonstration of positive drainage, to prevent ponding.

d. Consideration for Snow and Ice

e. Determination of wind resistance rating in accordance with ASCE-7

Minimum Design Loads for Buildings and Other Structures.

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4. DRAWINGS ACCOMPANYING SPECIFICATIONS:

The drawings accompanying this specification are a part of the specifications. Drawings and specifications are the property of the Government and shall not be used for any purpose other than that contemplated by the specifications.

5. WASTE:

Demolished materials, waste/debris are the property of the Contractor, unless otherwise stated herein. The Contractor is responsible for proper disposal/recycling of such materials off base according to federal, state, and local environmental regulations.

Waste material containers shall be provided at each job site, and promptly removed from the installation once filled.

6. SITE VISITATION:

Prior to submitting a proposal, it is highly recommended that the prospective contractor schedule a site visit in order to satisfy themselves as to the character of each roof project, and any other unique requirements of the work to be performed. A site visitation may be arranged with the CO.

7. TIME OF COMPLETION:

Estimated time of completion is 120 calendar days after the notice to proceed.

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