A04_SOW.pdf

Statement of Work (SOW) for Roof Replacement on Feed Building

Project Overview

This Statement of Work (SOW) specifies the requirements for replacing three roof sections on the Feed Building at the Dworshak National Fish Hatchery (DNFH). The existing roofing, made of asphalt rolled material and covering about 5,208 square feet, will be removed and replaced with White DuroLast or an equivalent membrane material, as outlined in UFC 3-110-03 (sections 2-7 through 2-9; see Appendix A). All work must meet industry standards and comply with safety regulations, including OSHA 29 CFR 1926.501 Fall Protection and US Army Corps of Engineers (USACE) EM 385-1-1 safety standards.

Project Objectives

• Remove existing asphalt rolled roofing from the three roof sections of the Feed Building.

• Install DuroLast or equivalent Membrane white in color roofing material.

• Ensure compliance with UFC 3-110-03 Chapter 2, see (Appendix A) Federal standards for roofing installation.

• Maintain safety protocols in accordance with USACE EM 385-1-1 standards.

Scope of Work

Tasks

1. Preparation and Planning

• Conduct a site assessment to determine the condition of the existing roofing and any additional support requirements.

• Develop a detailed work plan and schedule to be implemented, including safety measures following the EM 385 (Safety and Health Requirements Manual ACOE).

• The contractor will submit product data of the new roofing system and the warranty that will be provided by the contractor at completion of this scope of work

2. Removal of Existing Roofing

• Remove the existing asphalt 2-Ply Firestone Modified Bitumen (adhered with hot asphalt) rolled roofing from the designated areas.

• Clear all debris from the roof. Remove asphalt residue completely to prevent chemical damage to the EPDM membrane and new roofing system.

• Dispose of removed materials in accordance with local regulations and environmental guidelines.

3. Installation of Membrane Roofing

• Prepare the decking to ensure proper adhesion.

• Membrane type must be in accordance with UFC 3-110-03

• Prepare existing roof penetrations as needed, (vents, drains, etc.).

• Install the Membrane material in accordance with UFC 3-110-03 and according to manufacturer specifications while following industry best practices.

• Ensure all seams and penetrations are adequately sealed to prevent leaks.

4. Quality Control and Inspection

• COR - Conduct interim inspections throughout the project to ensure compliance with industry standards.

• Membrane manufacturer is required to conduct a final inspection of the installed roofing system to provide the warranty.

5. Site Cleanup

• Remove all debris, tools, and equipment from the job site.

• Ensure the area is left in a clean and safe condition.

Deliverables

• Roof replacement completed per industry standards and manufacturer recommendations.

• Final inspection report signed by the COR confirming compliance contract requirements.

• Pre-work submittal: an accident prevention plan (APP) will need to be submitted prior to work being performed. In the APP the contractor will describe how they intend to access the rooftops (scaffolding, manlift, stair tower, etc..) and what fall protection measure they will be taking (fall arrest, guard railing, horizontal lifeline, etc..) and must be submitted for review and approval prior to starting work.

• Include a manufacturer’s material warranty, minimum of 20–30 years covering leaks from defects or normal wear, plus a separate contractor workmanship warranty for 1–5 years covering installation errors.

• Include updated drawings to reflect installation details, O&M for new system, and product information.

Materials

• The contractor will be responsible for all materials delivered to the project job site.

• Lay down area (contactor parking and material storage) will be on the West side of the feed building in the allotted parking area.

• The contractor will be responsible for unloading and loading all material to and from the jobsite.

Government furnished equipment

• None.

Period of Performance

• Work must be completed between July 1, 2026 and September 25, 2026

Safety Requirements

• All work must comply with OSHA 29 CFR 1926.501 Fall Protection and USACE EM 385-1-1 section 21, fall protection standards for work on or around elevated areas.

• Safety meetings will be held at the start of each workday. A copy of each documented tailgate meeting will be submitted to the project COR. (see below) Electronic copies will be accepted.

• Personal Protective Equipment (PPE) must be worn at all times on site.

• Ensure proper fall protection measures are in place for work performed on elevated areas and within 6 feet of the leading edge of any roofline.

Acceptance Criteria

The job will be considered complete when:

• All roofing work is completed according to industry standards and contract requirements.

• All warranties have been provided according to specifications under the “deliverables” section of this Statement of Work.

• COR inspects to ensure all Statement of Work requirements are met.

• Final inspection passed by a representative of the membrane manufacturer is complete.

• The job site is thoroughly cleaned of all debris and materials.

Location or project

• Dworshak National Fish Hatchery; 276 Dworshak Complex Dr; Orofino Idaho, 83544

• Hours: Monday–Friday, 6:00am–4:30pm. Work beyond these times requires COR approval.

• Building location or identification - Feed Building

Technical Coordinators/Contracting Officer

• Kurt McCorkle; Facility Operations Specialist, COR; 208-400-0002 kurt_mccorkle@fws.gov

• Chris Foster; Hatchery Coordinator; 208-702-3816 christopher_w_foster@fws.gov

• Russ Brotnov; Maintenance Supervisor; 208-507-2303 russell_brotnov@fws.gov

• Tiffannie Pannell; Contracting Officer, 703-468-8281 tiffannie_pannell@ios.doi.gov mailto:kurt_mccorkle@fws.gov mailto:christopher_w_foster@fws.gov mailto:russell_brotnov@fws.gov mailto:tiffannie_pannell@ios.doi.gov

Appendix A

CHAPTER 2 LOW-SLOPE ROOFING DESIGN REQUIREMENTS

2-1 GENERAL.

The NRCA Manual provides a wide range of information for design and construction of low-slope roofing assemblies. This chapter does not address low-slope metal roofing (see Chapter 5). This chapter reinforces particularly salient information with regard to military use or limits the applicability of certain techniques in the NRCA Manual. Where contents of the NRCA Manual are acceptable without modification, those sections are not mentioned herein.

2-2 DESIGN-BUILD.

Because of the wide variety of materials available and the variation in quality in similar materials, design-build contracts for low-slope roofing systems must name the specific desired low-slope roofing system (BUR, \1\ Modified Bitumen, MREC, /1/ EPDM, etc.) and identify relevant performance requirements to be provided under the contract. It is not sufficient to simply specify a low-slope roofing system per this UFC.

2-3 GENERAL LOW-SLOPE ROOFING REQUIREMENTS.

2-3.1 Positive Drainage.

The minimum slope for construction of new buildings is ½:12 to achieve positive drainage. Consult with a plumbing engineer to determine the appropriate number of roof drains and the size of drain pipes. \2\ Refer to the International Plumbing Code (IPC), Chapter 11, Storm Drainage. /2/ Retrofit drains are not permitted.

2-3.2 Roof Curb Heights.

Curbs height shall be a minimum of 8 in. (200 mm) above the roof surface, but shall not be less than 6 in. (150 mm) above the high point of a cricket. Roofs with slope may need additional crickets on the upslope side of all non-round penetrations to assure positive drainage around equipment.

Crickets are required on the upslope side of all penetrations greater than 24-in. (610-mm) wide

2-3.3 Horizontal Roof Top Duct Work.

Horizontal roof-top ductwork shall have a minimum clearance of 18 in. (455 mm) above the roof plane to ensure ease of re-roofing. Ductwork larger than 48-in. (1220-mm) wide will require a minimum clearance of 24-in. (610-mm) and shall be coordinated with the HVAC engineer.

2-3.4 Snow and Ice.

Over-the-eaves drainage in cold climates can be problematic if snow and ice issues are not addressed early in the design process. Issues that designers shall address are contained in the Cold Regions Research & Engineering Laboratory (CRREL) report MP01-5663, Minimizing the Adverse Effects of Snow and Ice on Roofs.

Locate downspouts to avoid ice build-up on pedestrian circulation paths.

2-3.5 Hail.

Some geographical areas of the United States are more prone to severe hail events. Roof assemblies shall be capable of resisting impact from reasonably expected hail storms for a given geographical area in accordance with IBC-2009 Paragraph 1504.7. Typical enhancements include a thicker membrane combined with a rigid coverboard directly below the membrane.

Owners of critical facilities, such as hospitals, schools, computer centers, airports and sensitive government buildings have come to realize the importance of installing a hail resistant roof assembly over critical facilities. Hail-resistant roof assemblies shall incorporate high-density cover boards when fully-adhered roof covers are specified. Examples of roof covers that have been shown to perform well in hail prone areas (up to 2-in. (50-mm) hail stone size) include the following:

• Aggregate surfaced built up roofing

• Aggregate surfaced modified bitumen

• \1\ /1/

• Fully adhered 90 mil (2.28 mm) EPDM

• Granule or smooth with coating polyester reinforced modified bitumen 2-3.6 Vegetative Roofing Systems.

Vegetative roof systems are a roof area of plantings/landscaping installed above a waterproofed substrate at any building level that is separated from the ground beneath by its manmade structure.

A vegetative roof system consists of a waterproofing system and its associated components such as protection course, root barrier, drainage layer, thermal insulation and aeration layer, and an overburden of growth medium and plantings. See NRCA Vegetative Roof Systems for additional information.

Vegetative roof systems must be installed over newly installed roof systems and cannot be installed over existing roof systems. Knowledgeable selection of compatible building materials, quality vegetative roof system materials, and systems that will withstand the conditions of the location where a building is located are vital to a quality vegetative roof assembly design. Properly prepared contract documents with accurate drawings and details are essential. Vegetative roof systems shall be designed by an RRC or a registered PE or RA that derives his or her principal income from roofing design. Test the final assembly with a 48-hour water test per ASTM D5957 and/or using an electric field vector mapping (EFVM) system (see Appendix B for more info on EFVM).

Recommended waterproof membrane systems for use in vegetative roofs include:

• Hot fluid applied modified asphalt membrane, fabric reinforced – 215 mils minimum thickness

• Atactic polypropylene polymer (APP) and Styrene butadiene styrene (SBS) polymer modified bitumen sheet membrane, 2-layer minimum

• 1\ /1/

• PVC reinforced – 72 mils (1.82 mm) minimum thickness

2-4 ROOF DECKS.

2-4.1 Deck Slope.

For new construction, the minimum slope noted in Chapter 2, Positive Drainage, must be accomplished in the structural deck.

2-4.2 Types of Roof Decks.

2-4.2.1 Steel Decks.

Steel roof decks are common on military facilities. When properly designed, they provide an economical and dependable roof deck. They are lightweight and are particularly useful where relatively large clear spans are desired. Mechanically attach roof insulation for this type of roof deck. Design to prevent mechanical fasteners from backing out enough to disengage the deck. In addition, the design of the roof insulation must be tolerant of a small degree of fastener back out.

Two layers of insulation are required. Depending on wind resistance requirements, all layers of insulation may be mechanically fastened or the bottom layer may be mechanically fastened and the top layer adhered. Wood fiberboard may not be in direct contact with steel decks.

2-4.2.2 Structural Concrete Decks.

Structural precast and poured-in-place concrete roof decks are also commonly used on military projects. They are heavy and are best suited to roof decks with relatively short spans. Use mechanically fastened insulation only when fully adhered roof systems will not meet the required wind uplift resistance. Due to the inherent moisture in the concrete, proper drying time is required.

Ensure during system selection and installation that adequate bonding takes place between the roof system and the deck. Prior to installing any roof system on a concrete deck, conduct a test per ASTM D4263. The deck is acceptable for roof system application when there is no visible moisture on underside of plastic sheet after 24 hours.

2-4.2.3 Wood-Plank and Structural Wood-Panel Decks.

Wood-plank and structural wood-panel decks were used in the past on many military facilities.

Generally, this material may only be used on small buildings or in reroofing when the existing material is in fair or better condition. Use of this material on new buildings must be supported with strong arguments demonstrating that neither steel nor structural concrete decks fulfill the specific functional requirements. \3\Use of FRT treated plywood and FRT treated wood panels is prohibited.

/3/ 2-4.2.4 Cement-Wood Fiber Deck Panels.

Cement-wood fiber deck panels have limited utility due to concerns about moisture susceptibility.

This type of deck shall not be used for new construction.

2-4.2.5 Lightweight Insulating Concrete Decks.

Lightweight insulating concrete decks have limited utility due to its hydroscopic nature and difficulty of reroofing. Do not use this type of roof deck for new construction.

2-4.2.6 Poured Gypsum Concrete Decks.

Poured gypsum concrete decks have limited utility due to difficulty in attaching membranes to the deck and difficulty in repair. Do not use this type of roof deck for new construction.

2-4.2.7 Precast Gypsum Panel Decks.

Precast gypsum panel roof decks have been used on many military facilities. However, where membrane leaks have occurred, these roof decks pose a safety hazard due to structural instability.

Do not use this type of roof deck for new construction.

2-4.2.8 Thermosetting Insulating Fills.

Thermosetting insulating fills have limited utility. Do not use this type of roof deck for new construction.

2-5 RIGID BOARD ROOF INSULATION.

2-5.1 General.

Roof insulation is a very cost-effective means of reducing energy consumption. Depending on climate and the type of membrane selected, the position of the insulation in the roof system greatly affects the performance of the roof system. Insulation system shall be selected and designed to meet the requirements in UFC 3-101-01, “Architecture”, and \1\ UFC 1-200-02, “High Performance and Sustainable Building Requirements”. /1/

2-5.2 Types of Roof Insulation.

2-5.2.1 Cellular Glass Insulation.

Cellular glass roof insulation is not widely used due to its high cost. It is most commonly used in cold storage facilities and other areas where excessive amounts of moisture would degrade the insulating capabilities of other types of insulation.

2-5.2.2 Perlite Board Insulation.

Perlite board insulation is commonly used and may be specified where factors other than insulating efficiency per unit thickness are the primary design considerations. It is particularly useful in roof assemblies where fire resistance is of primary concern and the potential for water vapor intrusion is limited. Perlite board shall not be used in high-wind areas.

2-5.2.3 Polyisocyanurate Foam Board Insulation.

Polyisocyanurate foam board is the most commonly used roof insulation. It is often specified where insulating ability is the primary design consideration. The minimum compressive strength of polyisocyanurate foam board shall be 25 psi (172 kPa).

2-5.2.4 Polystyrene Board Insulation.

Polystyrene board roof insulation is used by the military and is made in two types: expanded polystyrene board (EPS) and extruded polystyrene board (XPS). In terms of moisture resistance and insulating capability, XPS is superior to EPS. It is also more expensive but appropriate for use in inverted membrane systems and cold storage facilities. Do not use polystyrene in direct contact with hot mopped systems. It is typically necessary to use underlayment board and cover board with polystyrene insulation in order to provide for necessary fire interior and exterior ratings and membrane adhesion properties, except when used as part of a loose-laid, inverted roof system assembly on concrete deck. When polystyrene is used on the interior of a building, it must be encased with a fire resistive material.

2-5.2.5 Composite Board Insulation.

Composite board roof insulation may be specified where a multiple layer type of insulation does not satisfy all design requirements, and where there are cost savings available from reducing the number of construction operations needed to install two different kinds of roof insulation. Single layer applications shall be limited when possible.

2-5.2.6 Phenolic Foam Board Insulation.

Phenolic foam board insulation causes severe corrosion when in contact with steel roof decks. It is no longer manufactured in the United States. Phenolic foam board insulation shall not be specified for use.

2-5.2.7 Tapered Insulation Systems.

Tapered rigid board roof insulation systems are more expensive per square unit than non-tapered insulation. As a result, do not use tapered insulation to create the primary slope in new construction. Use tapered insulation in crickets and saddles to ensure positive drainage when adequate drainage already exists in the roof deck as a whole. The slope of crickets and saddles shall be twice that of the main slope.

2-6 COVER BOARDS.

2-6.1 General.

Coverboards installed directly below the roof membrane shall be used within all roof assembles except single-ply ballasted roof systems. Coverboards provide the following functions:

1. Separate incompatible material

2. Minimize the effects of thermal drift; and

3. Protect the thermal insulation and provide a rigid support for the roof membrane.

2-6.2 Types of Cover Boards.

2-6.2.1 Glass Mat Silicon-modified Gypsum Boards.

Provides improved impact and moisture resistance to roof covers and improved fire resistance.

2-6.2.2 High Density Wood Fiber.

Provides improved impact resistance to roof covers, but is hydroscopic in nature.

2-6.2.3 Paper-faced Gypsum Board.

This shall not be used as a cover board.\2\

2-7 SUITABLE ROOF MEMBRANES.

The NRCA Manual discusses all available roof membranes; however, some membranes do not provide the long-term performance requirements for military buildings. Some new products may not be judged suitable because of the lack of proven performance. Other membrane systems may not be suitable because experience has shown a lack of cost effectiveness over the required life cycle.

Generally, low-slope roof membranes that are suitable for use by the military are limited to the following:

1. Asphalt built-up roof (BUR) membranes

2. Styrene butadiene styrene (SBS) or atactic polypropylene polymer (APP) modified bitumen (MB) membranes

3. Ethylene propylene diene monomer (EPDM) single-ply membranes

4. Weldable thermoplastic polyvinyl chloride (PVC) single-ply membranes

5. Weldable Thermoplastic Polyolefin (TPO)

6. Spray applied polyurethane foam (SPF) membranes

7. Hot rubberized reinforced fluid-applied membranes. /2/

2-8 GUIDANCE FOR ROOF MEMBRANES.

This Section provides requirements and considerations for the design and construction of the above roof membrane types. \2\ Consider the use of any membrane type for which there is not a corresponding UFGS on a case-by-case basis, subject to approval by the project manager. \3\

a) Acrylic Elastomers are usually water based, which makes them easy to apply and to clean up; and they are relatively inexpensive. Select material that has a short cure time.

b) Polyurethane Elastomers can be either one- or two-components and are usually spray applied. Granules are often added to the final coat to provide traction (silicone can be slippery) and to harden the final coat. These coatings are prone to pinholing when applied in thick coats (over 30 mils (0.76 mm) wet).

c) Vinyl, Hypalon, and Neoprene are not recommended because of their low volume solids. Butyl coatings are not recommended because they are not resistant to high levels of ultraviolet light. /3/

2-8.1 Asphalt BUR Membranes.

/2/ BUR systems have broad applicability for dependable low-slope roof systems with low service life cost. Consider this roof system unless it can be shown that it fails to meet important design criteria. Positive attributes of BUR membranes include:

• Durability with long service life

• Low maintenance

• Well-understood maintenance procedures However, the success of this roofing system is based upon sound installation techniques accompanied by suitable quality control. Quality control can be influenced by the warranty. More information on warranties may be found in Appendix D and more information on quality assurance may be found in Appendix E.

2-8.1.1 Cant Strips.

Provide cant strips for all built-up roof systems.

2-8.1.2 Fiberglass Mat Material.

BUR systems must use fiberglass mat material and no less than three-ply or as limited by the UFGS.

2-8.1.3 Roof Vents.

\1\ Ventilating base sheets are required on all concrete roof deck systems. Roof vents are not permitted for new construction. /1/

2-8.1.4 Types of BUR Membrane Surfacing.

The allowable types of top surfacing for BUR membranes are granulated modified bitumen cap sheet and aggregate.

2-8.1.4.1 Granulated Modified Bitumen Cap Sheet.

Ceramic granules reduce the temperature effect on BUR systems. However, as granules are lost, degradation due to ultraviolet (UV) radiation will negatively affect performance. Longevity of these systems on average is not as great as aggregate surfaced BUR systems.

2-8.1.4.2 Aggregate Surface.

The most common type of BUR surfacing is aggregate embedded in a bituminous flood coat. The thickness of 400 lb. (180 kg) gravel surfacing per square of roofing is 0.5 to 0.75 in. (12 to 18 mm).

This surfacing allows the temperature of the BUR membrane to remain somewhat cooler than mineral surfaced cap sheet BUR systems. Aggregate surface BUR systems tend to have a longer expected service life than mineral surfaced cap sheet BUR systems because of lower membrane temperature and due to protection of the membrane by the aggregate.

Aggregate surfaced roof system coverings shall be designed and installed in accordance with the IBC Code and Table 1504.4 based on the exposure category and basic wind speed at the building site. The aggregate shall comply with the ASTM D1863 No. 6 aggregate in hurricane prone regions as defined by the IBC Section 1609.2. Aggregate is not permitted when the basic wind speed is 100 mph or greater or at airfields.

2-8.2 MB Membranes.

MB roofing systems have low maintenance cost, and must be considered when long service life is required. The polymers used to modify the asphalt bitumen improve the performance characteristics of the asphalt. The addition of polymers increases low temperature flexibility and high temperature stability. MB membranes are reinforced with fiberglass, polyester, or a combination of both. MB membranes must have at least two-ply or as specified by the UFGS.

\4\

2-8.2.1 Polymer Modifiers and Application Methods.

The two major types of bitumen modifiers are an elastomeric styrene butadiene styrene (SBS) polymer and a thermoplastic atactic polypropylene (APP) polymer. SBS systems are usually applied by hot mopping asphalt; however, torch varieties of SBS membranes are gaining prominence. Some SBS products are applied with cold adhesive or torching. APP systems are typically applied with propane torches, which necessitates special requirements for safe handling and storage.

2-8.2.2 System Selection and Fire Safety.

Evaluate roofing materials and characteristics of roof decks and structures for combustibility. If materials or structures are “combustible” as defined by NFPA 101, torch application of the roofing system is prohibited and an alternate method of application must be used.

Use non-combustible materials for torch-applied systems, including the roof deck, parapets, insulation, cant strips, nailers, and structure. In addition, the roofing contractor must conduct an on-site two-hour fire watch after the last torch is extinguished. Provide access to the building interior for the fire watch personnel. /4/

2-8.2.3 MB Membrane Surfacings.

The three common types of surfacing used for the top sheet of MB systems are granulated surfaced, metal foil faced, and coated smooth surfaced.

2-8.2.3.1 Granulated Surface.

Ceramic granules reduce the temperature effect on MB systems. However, as granules are lost, degradation due to ultraviolet (UV) radiation will negatively affect performance. Longevity of these systems on average is not as great as aggregate surfaced MB systems.

2-8.2.3.2 Metal Foil Surface.

Metal foils surfaced MB roof systems may be used to achieve solar reflectivity or to improve fire resistance.

2-8.2.3.3 Smooth Surface.

Uncoated smooth surfaced systems are not permitted. Smooth surface membranes must be factory coated for heat reflection and UV protection.

2-8.3 Thermoset EPDM Membranes.

EPDM roof membranes provide predictable serviceability in roof systems in all climates. The minimum sheet thickness shall be 90 mil. All lap seams shall be fabricated with 6in. (150 mm) seam tape and stripped-in with self-adhering, semi-cured EPDM cover strips.

\3\ EPDM roofing is not resistant to grease and oil and therefore should not be installed near exhaust vents from food preparation areas. /3/

\1\ /1/

2-8.3.1 Mechanically fastened EPDM Systems.

Mechanically fastened EPDM are not permitted.

2-8.3.2 Fully Adhered EPDM Systems.

Fully adhered EPDM systems do not allow billowing of the membrane and are the preferred method of EPDM installation. \3\ Fully-adhered systems, only, are recommended for use in ESC locations C4 and C5, and especially in the areas subject to hurricanes and typhoons. /3/

2-8.3.3 Ballasted EPDM Systems.

Ballasted EPDM roof systems use larger sheets with factory made seams, which are proven superior to field seams. The downside of ballasted roof systems is the need for stone ballast or concrete pavers, and the increased difficulty in detecting sources of leaks. The ballast is relatively heavy at 10 to 12 lbs. per sf. (49 to 59 kg per sm) and may affect the structural system. All ballasted systems shall comply with ANSI/SPRI RP-4, Wind Design Standard for Ballasted Single-ply Roofing Systems. \2\\3\ 2-8.3.4 Coating of EPDM Systems.

In ESC locations C4 and C5, coat the EPDM. Recoating will be necessary in 3 to 5 years to maintain high reflectivity. A factory-laminated reflective surface is recommended as the life of the membrane will far out last the field-applied coating. After the factory-applied surface has deteriorated (about 10 years in tropical locations) the EPDM membrane can be field-coated for reflectivity. /3/

2-8.4 WeldableThermoplastic Membranes.

Thermoplastics are materials that soften when heated and regain their physical properties upon cooling. Weldable thermoplastic membranes are appealing as roofing systems because when the seams are properly heat welded they can exhibit seam strengths comparable to the membrane sheet. \2\ Weldable thermoplastic membranes are available in many different colors and are often rated as a cool roof. to reduce energy consumption. While the material costs are higher than bituminous-based roofing, labor costs are generally lower. Properly constructed weldable thermoplastic membrane systems may last 15 years or more. Thermoplastic systems permitted in DON are Polyvinyl Chloride (PVC), and Thermoplastic Polyolefin (TPO). Both systems have been used successfully for over 15 years. The minimum thickness of weldable thermoplastic membranes shall be \1\ 60 mils (1.52 mm) /1/ for PVC and 72 mils for

TPO. /2/

2-8.4.1 Mechanically Fastened Weldable Thermoplastic Systems.

Mechanically fastened weldable thermoplastic systems allow some billowing of the roof membrane ; however, this is greatly limited by reinforcement fabrics. Cool roofs in ASHRAE Climate Zones 4-8 shall be fully adhered and not mechanically fastened. \2\ Mechanically fastened TPO is not allowed.

2-8.4.2 Fully Adhered Weldable Thermoplastic Systems.

Fully adhered weldable thermoplastic systems do not allow billowing of the roof membrane and are the preferred method of installation.

2-8.5 Thermoplastic Polyolefin (TPO).

TPO membranes are typically white in color and, as a thermoplastic, the seams are heat welded.

Specify TPO with 72 mil (1.8 mm) minimum thickness.

Mechanically fastened systems are popular but are restricted to the ‘rhino bond’ system and therefore not allowed due to lack of competition. Fully adhered systems are required. A cover board shall be utilized in all systems. /2/

2-8.6 Hot Rubberized Reinforced Fluid-applied Membranes.

Hot rubberized reinforced fluid-applied membranes are only permitted when designed and shop drawings reviewed by an RRC or a registered PE or RA that derives his or her principal income from roofing design. Further, the membrane shall be applied to a minimum 4-inch (100-mm) thick concrete surfacing. \2\ /2/

2-9 LOW-SLOPE CONSTRUCTION DETAILS.

Use the NRCA Construction Details CD - 2010 construction details as applicable, except as noted in Table 2-1 in this UFC. For details pertaining to low-slope metal roofing, refer to Chapter 5 of this document. Design documents for individual projects must supplement these standard details with additional information related to closures, terminations, transitions, corners, lap and joint conditions, materials interface, sealant requirements, and other project specific conditions.

Address all flashing requirements with a complete set of detail drawings. Minimize the use of pitch (or pourable sealer) pans.

\2\

TABLE 2-1. LOW-SLOPE ROOFING CONSTRUCTION DETAIL LIMITATIONS

NRCA Detail Comments BUR-4 For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

BUR 4S For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

BUR-7A Do not use.

BUR-7AS Do not use.

MB-4 For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

MB-4S For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

MB-7A Do not use.

MB-7AS Do not use.

TS-4 For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

TS4S For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

TS-5 Termination Bar holes must be slotted for expansion and contraction.

TS-5S Termination Bar holes must be slotted for expansion and contraction.

TS-7A Do not use.

TS7AS- Do not use.

TP-4 For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

TP-4S For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

TP-7A Do not use.

TP-7AS Do not use.

SPF-(FB)-1 Fleece-backed membrane not applicable.

SPF-(FB)-2 Fleece-backed membrane not applicable.

SPF-(FB)-3 Fleece-backed membrane not applicable.

SPF(FB) -4 Fleece-backed membrane not applicable.

SPF(FB)-5 Fleece-backed membrane not applicable.

SPF(FB)-6 Fleece-backed membrane not applicable.

SPF(FB)-

11(FB)&18(FB)

Fleece-backed membrane not applicable.

SPF-4 For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

SPF-4S For use only with concrete parapet walls where installation of a reglet and counter flashing inserted into the reglet joint is not possible.

SPF-5 Termination Bar holes must be slotted for expansion and contraction.

SPF-5S Termination Bar holes must be slotted for expansion and contraction.

SPF-7A Do not use.

SPF-7AS Do not use.

Technical Coordinators:

Kurt Mccorkle-Site Visit-Contractors must RSVP to the Technical Coordinators no later than 48 hours prior to the site visit if planning to attend

Phone: 208-400-0002

Email: kurt_mccorkle@fws.gov

Alternate: Back-up

Christopher Foster

Phone: 208- 593-6304

Email: christopher_w_foster@fws.gov

Contracting Officer: Email questions and quotes only

Tiffannie Pannell

Phone: 703-468-8281

Email: tiffannie_pannell@ios.doi.gov mailto:kurt_mccorkle@fws.gov mailto:christopher_w_foster@fws.gov mailto:tiffannie_pannell@ios.doi.gov

Date of Issue 1/28/2025

Asbestos Northwest, LLC

30620 Pacific Hwy S, #103, Federal Way, WA 98003

Ph: (253) 941-4343 Batch Number: 202510225

Attn: Date Received: 1/27/2025

Date Analyzed: 1/27/2025

Samples Received: 6

Samples Analyzed: 6

Project:

Location:

Client Sample

ID

Lab Sample

ID

Layer Description Matrix

% Non-Asbestos

Fibers

% Asbestos Fibers and Type

T-1 1 1 Black asphaltic material Asphalt/binder 2% Cellulose, Glass fibers None Detected

Black asphaltic fibrous material Asphalt/binder 7% Cellulose None Detected

3 White foam Foam None Detected None Detected

4 Brown fibrous material Filler 90% Cellulose None Detected

T-2 2 1 Black asphaltic material with sand

Asphalt/binder, Sand

7% Cellulose, Glass fibers None Detected

2 Black asphaltic material Asphalt/binder 2% Cellulose, Glass fibers None Detected

3 White foam Foam None Detected None Detected

4 Brown fibrous material Filler 90% Cellulose None Detected

M-1 3 1 Black asphaltic material with sand

Asphalt/binder, Sand

7% Cellulose, Glass fibers None Detected

2 Black asphaltic material Asphalt/binder 5% Cellulose, Glass fibers None Detected

3 White foam Foam None Detected None Detected

PLM Analysis by EPA Method 600/M4-82-020 and 600/R-93/116 This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, or any agency of the U.S. Government.

Feed Building Roof Repair

Dworshak National Fish Hatchery

276 Dworshak Complex Dr Orofino ID

83544

U.S. Fish and Wildlife Service

Chris Foster

Report Page 1Analyzed by: Ian Smith Authorized by: Dan Lafley

Samples Received: 6

Samples Analyzed: 6

Project:

Location:

Client Sample

ID

Lab Sample

ID

Layer Description Matrix

% Non-Asbestos

Fibers

% Asbestos Fibers and Type

PLM Analysis by EPA Method 600/M4-82-020 and 600/R-93/116 This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, or any agency of the U.S. Government.

Feed Building Roof Repair

Dworshak National Fish Hatchery

276 Dworshak Complex Dr Orofino ID

83544

U.S. Fish and Wildlife Service

Chris Foster

4 Brown fibrous material Filler 90% Cellulose None Detected

M-2 4 1 Black asphaltic material with sand

Asphalt/binder, Sand

7% Cellulose, Glass fibers None Detected

2 Black asphaltic material Asphalt/binder 5% Cellulose, Glass fibers None Detected

3 White foam Foam None Detected None Detected

4 Brown fibrous material Filler 90% Cellulose None Detected

B-1 5 1 Black asphaltic material with sand

Asphalt/binder, Sand

10% Cellulose, Glass fibers None Detected

2 Black asphaltic material Asphalt/binder 3% Cellulose, Glass fibers None Detected

3 White foam Foam None Detected None Detected

4 Brown fibrous material Filler 90% Cellulose None Detected

B-2 6 1 Black asphaltic material with sand

Asphalt/binder, Sand

10% Cellulose, Glass fibers None Detected

2 Black asphaltic material Asphalt/binder 3% Cellulose, Glass fibers None Detected

Report Page 2Analyzed by: Ian Smith Authorized by: Dan Lafley

Samples Received: 6

Samples Analyzed: 6

Project:

Location:

Client Sample

ID

Lab Sample

ID

Layer Description Matrix

% Non-Asbestos

Fibers

% Asbestos Fibers and Type

PLM Analysis by EPA Method 600/M4-82-020 and 600/R-93/116 This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, or any agency of the U.S. Government.

Feed Building Roof Repair

Dworshak National Fish Hatchery

276 Dworshak Complex Dr Orofino ID

83544

U.S. Fish and Wildlife Service

Chris Foster

3 White foam Foam None Detected None Detected

4 Brown fibrous material Filler 90% Cellulose None Detected

Report Page 3Analyzed by: Ian Smith Authorized by: Dan Lafley kmccorkle Highlight kmccorkle Highlight kmccorkle Highlight kmccorkle Highlight kmccorkle Highlight kmccorkle Highlight