A04_Attachment_1_BAHARMREROOFSPECS.pdf

BUENOS AIRES NATIONAL WILDLIFE REFUGE HARM HOUSE REROOF

PIMA COUNTY, ARIZONA

SPECIFICATIONS

TABLE OF CONTENTS

SECTION

01009 GENERAL INFORMATION AND REQUIREMENTS

02070 SELECTIVE DEMOLITION

06100 ROUGH CARPENTRY

07542 TPO ROOFING

07620 SHEET METAL FLASHING

07920 JOINT SEALANTS

PIMA COUNTY, ARIZONA 2021

GENERAL INFORMATION AND REQUIREMENTS 01009-1

SECTION 01009 - GENERAL INFORMATION AND REQUIREMENTS

PART 1: GENERAL

1.1 SUMMARY:

A. Description of Work: The work shall consist of labor, equipment, supplies and material to install new membrane roofing system, and to remove existing roofing and plywood deck where rotted, and install new metal flashing, plywood deck, and other items as described in the drawings and specifications and required for a complete installation.

B. Location: Work under this contract is located at the Buenos Aires National Wildlife Refuge, Brown Canyon area, near Sasabe, Arizona, in Pima County, as shown on the drawings.

C. Site Visit: Contractors are encouraged to visit the project site and inspect existing conditions prior to submitting quotes. See Federal Acquisition Regulation (FAR) clause 52.236-27 Site Visit. Contact Tasha Harden, Refuge Manager, at 520-364-2104 x106, to arrange a site visit. Due to access control – locked gate – in Brown Canyon, a date and time will be designated by the Contracting Officer for all site visits.

1.2 REFERENCES:

Referenced Standards are listed in the applicable specification section.

1.3 DEFINITIONS:

Approvals: Approval of submittals is an indication that the Contractor’s submittals have been reviewed and that there are no objections, except as noted. Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer’s (CO) attention in writing.

1.4 SUBMITTALS:

A. Scope: Submittals include shop drawings, designated designs, manufacturer's literature, as-built drawings, samples, work schedules and a schedule of values.

B. Requirements: Refer to specification sections for submittals required. Allow at least 7 working days for review, plus transmittal time back and forth. Submittals shall be sent or

GENERAL INFORMATION AND REQUIREMENTS 01009-2

delivered to the Contracting Officers Technical Representative (COTR) at U.S. Fish and Wildlife Service, Region 2, Division of Engineering, P.O. Box 1306, Albuquerque, NM 87103-1306. Submittals shall come directly from the Contractor with their stamp and signature of approval; submittals will not be accepted from sub-contractors or suppliers.

Do not commence work which requires review of any submittals until receipt of returned submittals with an acceptable action. Do not allow submittals without an acceptable action marking to be used for the project.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter (Contractor), plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

3. Contract number, submittal number, and specification section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

5. Each item shall clearly note the manufacturers name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

D. Submittals shall be transmitted electronically by email with pdf or other standard electronic attachments. If an electronic submittal is not possible, unless stated otherwise in the individual specification section, provide 3 copies of hard copy submittals for use by the Government, plus the number of submittals needed to be returned to the Contractor for use by Contractor, sub-contractors, suppliers, or others.

E. There will be no approval of submittals prior to bid opening and award. Submittals will be evaluated based on the requirements of the specifications and drawings, during the submittal process after contract award.

1.5 CONFORMANCE:

Submittals must show clearly that the product, sample or shop drawing conforms to the specifications.

1.6 QUALITY ASSURANCE:

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This contract incorporates materials, applications, and tests by reference, with the same force and effect

GENERAL INFORMATION AND REQUIREMENTS 01009-3

as if they were given in full text.

B. Conflict: Where a conflict occurs between reference documents, drawings, and project specifications, the most stringent requirement shall govern.

C. Product basis: Where specifications or drawings call out a specific product or manufacturer, it is understood that an equal or better product is acceptable, as approved in the submittal process.

1.7 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: Protect products incorporated into the work from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturers’ name, brand designation, and contents legibly indicated. The containers shall bear the referenced specification number, type, and class as applicable.

B. Storage: Provide temporary storage facilities for products. Storage shall comply with the manufacturer's instructions. The storage area shall permit access for inspection and handling.

C. Handling: Load and unload products protecting them from damage.

1.8 PROJECT/SITE CONDITIONS:

A. The project site is the Buenos Aires National Wildlife Refuge. Work areas shall be roped off to alert unauthorized personnel to work in progress.

B. Existing property not indicated for demolition, shall be protected. All damage by

Contractors activities shall be repaired by the Contractor at no additional cost to the Government.

C. Safety is paramount. Contractor is responsible for safety on the project site and shall take measures to maintain a safe area around the project site which is used by Government employees and the public. Applicable OSHA regulations shall be adhered to by the Contractor. Contractor shall submit a safety plan prior to starting work.

D. Landscape Protection: Protect all vegetation inside and outside work limits. All rutting caused by Contractor activities shall be filled and contoured to match adjacent areas.

Areas damaged by Contractor activities shall be repaired.

E. Access: Road to the building site is gated. Contractors will be provided access during

GENERAL INFORMATION AND REQUIREMENTS 01009-4

normal working hours, with specifics to be coordinated at the Preconstruction conference.

1.9 SEQUENCING AND SCHEDULING:

A bar chart type work schedule shall be submitted to the COTR within 5 days after the preconstruction conference. When requested, submit an updated schedule within 3 calendar days.

PART 2: PRODUCTS

2.1 TEMPORARY FACILITIES:

A. Toilet facilities are available at the construction site for Contractor’s reasonable use.

B. Water is available at the site for Contractor’s reasonable use.

C. Electric power is available at the site for Contractor’s reasonable use.

PART 3: EXECUTION

3.1 PROJECT MEETINGS:

A. Preconstruction Conference:

1. A preconstruction conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date and place. The purpose of the meeting will be to review required work, project drawings and specifications, construction schedules, payroll, payments, and administrative provisions of the contract.

2. The Contractor, subcontractors and the persons responsible for coordination of the work shall be present at the meeting.

3. The Contractor shall submit a schedule of values within 5 days after the preconstruction conference, which may be used as a basis of payment as the work progresses.

B. Progress Meetings:

GENERAL INFORMATION AND REQUIREMENTS 01009-5

To be held at the project site as required.

C. Inspections:

1. Routine inspections will be performed by the government Contract Inspector (CI).

Inspection of items of work by the CI will not relieve the Contractor of the requirement to meet project specifications. The CI shall be informed 24 hours in advance of work requiring his observation. After being informed in advance the CI’s non-attendance shall not prohibit the Contractor from proceeding with work in the CI’s absence.

2. For final inspection, notify the COTR in writing at least 6 working days before the completion date so the Government can schedule final inspection. The superintendent shall be present during the final inspection.

3.2 DISPOSAL OF DEBRIS:

Demolition debris shall be removed from the project site and disposed of in a legal disposal site by the Contractor. Contractor shall pay all fees required for disposal.

3.3 AS-BUILT DRAWINGS:

A complete set of full-sized prints, furnished by the Contracting Officer for this purpose only, shall be kept by the Contractor. As the job progresses, continuously maintain as-built drawings of the work. The changes shall be noted legibly in red pencil or red ink.

These drawings shall be submitted to the COTR prior to final inspection. Should final inspection reveal changes in the Project not so noted on the As-Built Drawings, the Contractor shall record these changes on the As-Built Drawings within 3 working days of

Final Inspection and deliver completed As-Built Drawings to the COTR.

3.4 WARRANTY:

A. All project construction shall be provided with a one-year warranty in accordance with

FAR 52.246-21.

B. With respect to warranties, expressed or implied, from manufacturers or suppliers for materials or equipment furnished under the contract, the Contractor shall:

1. Obtain the most favorable warranties that would be given by the Contractor in normal commercial practices, but in no case less than called for by the specifications.

GENERAL INFORMATION AND REQUIREMENTS 01009-6

2. Require warranties to be executed, in writing, for the benefit of the Government.

3. Submit warranties to the COTR prior to the final inspection.

END OF SECTION

SELECTIVE DEMOLITION 02070 - 1

SECTION 02070 - SELECTIVE DEMOLITION

PART 1: GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Demolition and removal of roofing materials and other materials necessary for the accomplishment of the work.

2. Demolition of rotted wood deck may be required as identified by the Contractor and approved by the Contracting Officer.

1.2 MATERIALS OWNERSHIP

A. Demolished materials shall become the property of the Contractor, and shall be removed from the project site and legally disposed of.

PART 2: PRODUCTS (NOT USED)

PART 3: EXECUTION

3.1 EXAMINATION

A. The Contractor shall visit the site and verify the extent and location of the demolition work required. Correlate with drawings and specifications.

3.2 PREPARATION

A. Protection:

1. Provide for the protection of persons passing around or through the area of demolition.

2. Perform demolition so as to prevent damage to adjacent improvements and facilities to remain.

3. Examine structural supporting conditions and report to the COR any conditions which vary from the drawings or for which unstable conditions may be created by Contractor’s activities.

SELECTIVE DEMOLITION 02070 - 2

3.3 DEMOLITION - GENERAL

A. Remove debris daily.

B. Perform selective demolition using methods which are least likely to damage work to remain and which will provide adequate structural support and proper surfaces for patching.

C Any areas not called out for demolition but damaged by Contractor activities shall be repaired by the Contractor to pre-existing conditions at no additional cost to the government.

3.4 CLEANING

A. Clean areas affected by demolition to conditions existing prior to the demolition.

ROUGH CARPENTRY 06100 - 1

SECTION 06100 - ROUGH CARPENTRY

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Plywood.

2. Dimension lumber (if needed).

B. Products of manufacturers other than those listed will be considered on “as equal” basis.

1.2 DELIVERY, STORAGE, AND HANDLING

A. Keep materials under cover and dry. Protect from weather and contact with damp or wet surfaces. Stack lumber. Provide for air circulation within and around stacks and under temporary coverings.

PART 2 - PRODUCTS

2.1 LUMBER, GENERAL

A. Lumber Standards: Comply with DOC PS 20, "American Softwood Lumber Standard," and with applicable grading rules of inspection agencies certified by American Lumber Standards Committee's (ALSC) Board of Review.

B. Inspection Agencies: Inspection agencies, and the abbreviations used to reference them, include the following:

1. WCLIB - West Coast Lumber Inspection Bureau.

1. WWPA - Western Wood Products Association.

3. NELMA - Northeast Lumber Manufacturers Association.

4. NLGA - National Lumber Grades Authority.

5. SPIB - Southern Pine Inspection Bureau.

D. Grade Stamps: Provide lumber with each piece factory marked with grade stamp of inspection agency evidencing compliance with grading rule requirements and identifying grading agency, grade, species, moisture content at time of surfacing, and mill.

ROUGH CARPENTRY 06100 - 2

E. Where nominal sizes are indicated, provide actual sizes required by DOC PS 20 for moisture content specified. Where actual sizes are indicated, they are minimum dressed sizes for dry lumber.

1. Provide dressed lumber, S4S, unless otherwise indicated.

2. Provide dry lumber with 19 percent maximum moisture content at time of dressing for 2-inch nominal thickness or less, unless otherwise indicated.

2.2 DIMENSION LUMBER

A. General: Provide dimension lumber of grades indicated on the drawings according to the ALSC National Grading Rule (NGR) provisions.

2.3 FASTENERS

A. General: Provide fasteners of size and type indicated that comply with requirements specified in this Article and the International Building Code including Table “Nailing Schedule” for material, manufacture, size and number.

B. Nails: FS FF-N-105. Common wire nails or equivalent IBC Code approved fasteners for air powered equipment.

C. All fasteners and connectors shall be hot dip galvanized or stainless steel.

2.4. PLYWOOD

A. 5/8” Minimum, APA Exterior grade, and bearing APA rating for applicable spans.

2.5 WOOD PRESERVATIVE-TREATED MATERIALS

A. Lumber in contact with concrete or exposed to moisture, shall be preservative treated and comply with applicable requirements of AWPA. Mark each treated item with the Quality Mark Requirements of an inspection agency approved by ALSC’s Board of Review.

B. Acceptable treatments are amine copper quat (ACQ), “Nature Wood” (Osmos Brand

ACQ), and copper boron azole (CBA).

C. Unacceptable treatment is CCA, or any arsenate containing materials.

D. Pressure treated wood shall arrive at job site with moisture content less than 19%.

ROUGH CARPENTRY 06100 - 3

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Discard units of material with defects that impair quality of carpentry and that are too small to use with minimum number of joints or optimum joint arrangement.

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

C. Fit carpentry to other construction; scribe and cope as required for accurate fit.

Correlate location of furring, nailers, blocking, soffit joists, and similar supports to allow attachment of other construction.

D. Securely attach carpentry work as indicated and according to these specifications and the IBC.

E. Use fasteners of appropriate type and length. Avoid splitting wood.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 1

SECTION 075423 - THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Adhered thermoplastic polyolefin (TPO) roofing system.

1.3 DEFINITIONS

A. Roofing Terminology: Definitions in ASTM D1079 and glossary in NRCA's "The NRCA Roofing Manual: Membrane Roof Systems" apply to Work of this Section.

1.4 PREINSTALLATION MEETINGS

A. Preliminary Roofing Conference: Before starting on-site work, conduct conference at Project Site.

1. Meet with Owner and COR, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative.

2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.

3. Review and finalize construction schedule, and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

4. Review deck substrate requirements for conditions and finishes, including flatness and fastening.

5. Review structural loading limitations of roof deck during and after roofing.

6. Review base flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that affects roofing system.

7. Review temporary protection requirements for roofing system during and after installation.

8. Review roof observation and repair procedures after roofing installation.

1.5 SUBMITTALS

A. Product Data: For each type of product.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 2

B. Shop Drawings: Include roof plans, sections, details, and attachments to other work, including the following:

1. Base flashings and membrane termination details.

2. Flashing details at penetrations.

C. Wind Uplift Resistance Submittal: For roofing system, indicating compliance with wind uplift performance requirements.

D. Qualification Data: For Installer and manufacturer.

E. Manufacturer Certificates:

1. Performance Requirement Certificate: Signed by roof membrane manufacturer, certifying that roofing system complies with requirements specified in "Performance Requirements" Article.

a. Submit evidence of compliance with performance requirements.

2. Special Warranty Certificate: Signed by roof membrane manufacturer, certifying that all materials supplied under this Section are acceptable for special warranty.

F. Product Test Reports: For roof membrane and insulation, for tests performed by a qualified testing agency, indicating compliance with specified requirements.

G. Evaluation Reports: For components of roofing system, from ICC-ES.

H. Field quality-control reports.

I. Sample Warranties: For manufacturer's special warranties.

1.6 CLOSEOUT SUBMITTALS

A. Maintenance Data: For roofing system to include in maintenance manuals.

1.7 QUALITY ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer that is UL listed, listed in FM Approvals' RoofNav, listed in SPRI's Directory of Roof Assemblies for roofing system identical to that used for this Project.

B. Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's special warranty.

1.8 DELIVERY, STORAGE, AND HANDLING

A. Deliver roofing materials to Project site in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, approval or listing agency markings, and directions for storing and mixing with other components.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 3

B. Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing system manufacturer. Protect stored liquid material from direct sunlight.

1. Discard and legally dispose of liquid material that cannot be applied within its stated shelf life.

C. Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Store in a dry location. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.

D. Handle and store roofing materials, and place equipment in a manner to avoid permanent deflection of deck.

1.9 FIELD CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing system to be installed according to manufacturer's written instructions and warranty requirements.

1.10 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of roofing system that fail in materials or workmanship within specified warranty period.

1. Special warranty includes roof membrane, base flashings, roof insulation, fasteners, substrate board, and other components of roofing system.

2. Warranty Period: 20 years from date of Substantial Completion.

B. Government One Year Contractor/Installer Warranty: As described in Division 1 and General Conditions of the Contract.

1. Warranty Period: One year from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. General Performance: Installed roofing system and flashings shall withstand specified uplift pressures, thermally induced movement, and exposure to weather without failure due to defective manufacture, fabrication, installation, or other defects in construction. Roof system and flashings shall remain watertight.

1. Accelerated Weathering: Roof membrane shall withstand 2000 hours of exposure when tested according to ASTM G152, ASTM G154, or ASTM G155.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 4

2. Impact Resistance: Roof membrane shall resist impact damage when tested according to ASTM D3746, ASTM D4272, or the "Resistance to Foot Traffic Test" in FM Approvals 4470.

B. Material Compatibility: Roofing materials shall be compatible with one another and adjacent materials under conditions of service and application required, as demonstrated by roof membrane manufacturer based on testing and field experience.

C. Wind Uplift Resistance: Design roofing system to resist the ASCE/SEI 7 wind uplift pressures when tested according to FM Approvals 4474, UL 580, or UL 1897:

1. Zone 1 (Roof Area Field): per ASCE/SEI 7 as calculated by Contractor or roofing manufacturer, for the geographic site.

2. Zone 2 (Roof Area Perimeter): per ASCE/SEI 7 as calculated by Contractor or roofing manufacturer, for the geographic site

3. Zone 3 (Roof Area Corners): per ASCE/SEI 7 as calculated by Contractor or roofing manufacturer, for the geographic site

D. FM Approvals' RoofNav Listing: Roof membrane, base flashings, and component materials shall comply with requirements in FM Approvals 4450 or FM Approvals 4470 as part of a roofing system, and shall be listed in FM Approvals' RoofNav for Class 1 or noncombustible construction, as applicable. Identify materials with FM Approvals Certification markings.

1. Fire/Windstorm Classification: Class 1A-105.

2. Hail-Resistance Rating: FM Global Property Loss Prevention Data Sheet 1-34 Moderate

Hail Resistance Rating (MH).

E. SPRI's Directory of Roof Assemblies Listing: Roof membrane, base flashings, and component materials shall comply with requirements in FM Approvals 4450 or FM Approvals 4470 as part of a roofing system, and shall be listed in SPRI's Directory of Roof Assemblies for roof assembly identical for that specified for this Project.

1. Wind Uplift Load Capacity: 105 psf.

F. ENERGY STAR Listing: Roofing system shall be listed on the DOE's ENERGY STAR "Roof Products Qualified Product List" for low slope roof products.

G. Energy Performance: Roofing system shall have an initial solar reflectance of not less than 0.70 and an emissivity of not less than 0.75 when tested according to CRRC-1.

H. Exterior Fire-Test Exposure: ASTM E108 or UL 790, Class C minimum for application and roof slopes indicated; testing by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

I. Fire-Resistance Ratings: Comply with fire-resistance-rated assembly designs indicated. Identify products with appropriate markings of applicable testing agency.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 5

2.2 THERMOPLASTIC POLYOLEFIN (TPO) ROOFING

A. TPO Sheet: ASTM D6878/D6878M, internally fabric- or scrim-reinforced, TPO sheet.

1. Source Limitations: Obtain components for roofing system from roof membrane manufacturer or manufacturers approved by roof membrane manufacturer.

2. Thickness: 80 mils nominal.

3. Exposed Face Color: White.

2.3 AUXILIARY ROOFING MATERIALS

A. General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with other roofing components.

1. Adhesive and Sealants: Comply with VOC limits of authorities having jurisdiction.

B. Prefabricated Pipe Flashings: As recommended by roof membrane manufacturer.

C. Bonding Adhesive: Manufacturer's standard.

D. Metal Termination Bars: Manufacturer's standard, predrilled stainless steel or aluminum bars, with anchors.

E. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, preformed inside and outside corner sheet flashings, T-joint covers, lap sealants, termination reglets, and other accessories.

2.4 SUBSTRATE BOARDS

A. Substrate Board: Shall be as required to meet Performance Requirements of System, including MH rating.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements and other conditions affecting performance of the Work.

1. Verify that roof openings and penetrations are in place, curbs are set and braced, and roof-drain bodies are securely clamped in place.

2. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations and that nailers match thicknesses of insulation.

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

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 6

A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing system installation according to roofing system manufacturer's written instructions. Remove sharp projections.

B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction. Remove roof-drain plugs when no work is taking place or when rain is forecast.

3.3 INSTALLATION OF ROOFING, GENERAL

A. Install roofing system according to roofing system manufacturer's written instructions.

B. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system at end of workday or when rain is forecast.

Remove and discard temporary seals before beginning Work on adjoining roofing.

C. Install roof membrane and auxiliary materials to tie in to existing structure to maintain weathertightness of transition.

3.4 INSTALLATION OF ADHERED ROOF MEMBRANE

A. Adhere roof membrane over area to receive roofing according to roofing system manufacturer's written instructions.

B. Unroll roof membrane and allow to relax before installing.

C. Start installation of roofing in presence of roofing system manufacturer's technical personnel.

D. Accurately align roof membrane, and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.

E. Bonding Adhesive: Apply to substrate and underside of roof membrane at rate required by manufacturer, and allow to partially dry before installing roof membrane. Do not apply to splice area of roof membrane.

F. Fabric-Backed Roof Membrane Adhesive: Apply to substrate at rate required by manufacturer, and install fabric-backed roof membrane.

G. Apply roof membrane with side laps shingled with slope of roof deck where possible.

H. Seams: Clean seam areas, overlap roof membrane, and hot-air weld side and end laps of roof membrane and sheet flashings, to ensure a watertight seam installation.

1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of roof membrane and sheet flashings.

2. Verify field strength of seams a minimum of twice daily, and repair seam sample areas.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 7

3. Repair tears, voids, and lapped seams in roof membrane that do not comply with requirements.

I. Spread sealant bed over deck-drain flange at roof drains, and securely seal roof membrane in place with clamping ring.

3.5 INSTALLATION OF BASE FLASHING

A. Install sheet flashings and preformed flashing accessories, and adhere to substrates according to roofing system manufacturer's written instructions.

B. Apply bonding adhesive to substrate and underside of sheet flashing at required rate, and allow to partially dry. Do not apply to seam area of flashing.

C. Flash penetrations and field-formed inside and outside corners with cured or uncured sheet flashing.

D. Clean seam areas, overlap, and firmly roll sheet flashings into the adhesive. Hot-air weld side and end laps to ensure a watertight seam installation.

E. Terminate and seal top of sheet flashings and mechanically anchor to substrate through termination bars.

3.6 FIELD QUALITY CONTROL

A. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion, in presence of Inspector, and to prepare inspection report.

B. Repair or remove and replace components of roofing system where inspections indicate that they do not comply with specified requirements.

C. Additional testing and inspecting, at Contractor's expense, will be performed to determine if replaced or additional work complies with specified requirements.

3.7 PROTECTING AND CLEANING

A. Protect roofing system from damage and wear during remainder of construction period. When remaining construction does not affect or endanger roofing system, inspect roofing system for deterioration and damage, describing its nature and extent in a written report, with copies to Architect and Owner.

B. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 075423 - 8

END OF SECTION 075423

SHEET METAL FLASHING 07620-1

SECTION 07620 - SHEET METAL FLASHING & TRIM

1.1 SECTION INCLUDES

A. All roof edge and wall flashings.

B. Counterflashings.

C. Scuppers.

1.2 REFERENCES

A. ASTM A525 - Steel Sheet, Zinc Coated, (Galvanized) by the Hot-Dip Process.

B. ASTM B32 - Solder Metal.

C. ASTM B486 - Paste Solder.

D. ASTM D226 - Asphalt-Saturated Organic Felt Used in Roofing and

Waterproofing.

E. ASTM D4586 - Asphalt Roof Cement, Asbestos-Free.

F. FS O-F-506 - Flux, Soldering, Paste and Liquid.

G. NRCA (National Roofing Contractors Association) - Roofing Manual.

H. SMACNA - Architectural Sheet Metal Manual.

1.3 SUBMITTALS

A. Submit under provisions of Section 01009.

B. Shop Drawings: Indicate material profile, jointing pattern, jointing details, fastening methods, flashings, terminations, and installation details.

C. Product information documenting that materials and methods meet requirements of specifications and drawings.

BOSQUE DEL APACHE NWR REROOF 4 STALL GARAGE

SOCORRO COUNTY, NEW MEXICO 2017

SHEET METAL FLASHING 07620-2

1.4 QUALITY ASSURANCE

A. Perform work in accordance with standard details and requirements.

1.5 QUALIFICATIONS

Fabricator and Installer: Company specializing in sheet metal flashing work with.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, protect and handle products to site under provisions of Section

01009.

B. Stack preformed and prefinished material to prevent twisting, bending, or abrasion, and to provide ventilation. Slope metal sheets to ensure drainage.

C. Prevent contact with materials which may cause discoloration or staining.

PART 2 - PRODUCTS

2.1 SHEET MATERIALS

A. Galvanized Steel: ASTM A446, Grade A, G90 zinc coating; 22 gage core steel, 14 gage minimum for scuppers.

2.2 ACCESSORIES

A. Fasteners: Same material and finish as flashing metal, with soft neoprene washers.

B. Sealant

C. Bedding Compound: Rubber-asphalt or Butyl.

D. Solder: ASTM B32; type as recommended for material to be fastened.

E. Flux: FS O-F-506.

2.3 COMPONENTS

BOSQUE DEL APACHE NWR REROOF 4 STALL

GARAGE

SOCORRO COUNTY, NEW MEXICO 2017

SHEET METAL FLASHING

07620-3

A. Flashing and counterflashing.

2.4 FABRICATION

A. Form sections true to shape, accurate in size, square, and free from distortion or defects.

B. Fabricate cleats of same material as sheet, interlockable with sheet.

C. Form pieces in longest possible lengths.

D. Hem exposed edges on underside 1/2 inch; miter and seam corners.

E. Form material with flat lock seams.

F. Pretin edges of sheet. Solder shop formed metal joints. After soldering, remove flux. Wipe and wash solder joints clean. Weather seal joints.

G. Fabricate corners from one piece with minimum 18 inch long legs; seam and solder for rigidity, seal with sealant.

H. Fabricate vertical faces with bottom edge formed outward 1/4 inch and hemmed to form drip.

I. Fabricate flashings to allow toe to extend 2 inches over roofing. Return and brake edges.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify roof openings, curbs, pipes, sleeves, ducts, or vents through roof are solidly set, reglets in place, and nailing strips located.

B. Verify roofing termination and base flashings are in place, sealed, and secure.

A. Install starter and edge strips, and cleats before starting installation.

BOSQUE DEL APACHE NWR REROOF 4 STALL

GARAGE

SOCORRO COUNTY, NEW MEXICO 2017

SHEET METAL FLASHING

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B. Install surface mounted reglets true to lines and levels. Seal top of reglets with sealant.

3.3 INSTALLATION

A. Conform to drawing details included in the appropriate professional association manual.

B. Secure flashings in place using concealed fasteners. Use exposed fasteners only where permitted.

C. Apply plastic cement compound between metal flashings and felt flashings.

D. Fit flashings tight in place. Make corners square, surfaces true and straight in planes, and lines accurate to profiles.

E. Seal metal joints watertight.

3.4 FIELD QUALITY CONTROL

A. Field inspection will be performed.

B. Inspection will involve surveillance of work during installation to ascertain compliance with specified requirements.

END OF SECTION 07620

BUENOS AIRES NATIONAL WILDLIFE REFUGEHARM HOUSE REROOF

JOINT SEALANTS 07920 - 1

SECTION 07920 - JOINT SEALANTS

1.1 SUMMARY

A. This Section includes sealants for the following applications, including those specified by refer-ence to this Section:

1. Exterior joints in the following vertical surfaces and nontraffic horizontal surfaces:

a. Joints between different materials.

b. Other joints as indicated.

1.2 PERFORMANCE REQUIREMENTS

A. Provide elastomeric joint sealants that establish and maintain watertight and airtight continuous joint seals without staining or deteriorating joint substrates.

1.3 QUALITY ASSURANCE

A. Installer Qualifications: An experienced installer who has specialized in installing joint sealants similar in material, design, and extent to those indicated for this Project and whose work has re-sulted in joint-sealant installations with a record of successful in-service performance.

B. Source Limitations: Obtain each type of joint sealant through one source from a single manu-facturer.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to Project site in original unopened containers or bundles with labels indicat-ing manufacturer, product name and designation, color, expiration date, pot life, curing time, and mixing instructions for multicomponent materials.

B. Store and handle materials in compliance with manufacturer's written instructions to prevent their deterioration or damage due to moisture, high or low temperatures, contaminants, or other causes.

1.5 PROJECT CONDITIONS

A. Environmental Limitations: Do not proceed with installation of joint sealants under the follow-ing conditions:

1. When ambient and substrate temperature conditions are outside limits permitted by joint sealant manufacturer.

2. When joint substrates are wet.

B. Joint-Width Conditions: Do not proceed with installation of joint sealants where joint widths are less than those allowed by joint sealant manufacturer for applications indicated.

JOINT SEALANTS 07920 - 2

C. Joint-Substrate Conditions: Do not proceed with installation of joint sealants until contaminants capable of interfering with adhesion are removed from joint substrates.

PART 2 - PRODUCTS

2.1 PRODUCTS AND MANUFACTURERS

A. Available Products: Subject to compliance with requirements, products that may be incorpo-rated into the Work include, but are not limited to, the products specified in the sealant sched-ules at the end of Part 3.

2.2 MATERIALS, GENERAL

A. Compatibility: Provide joint sealants, backings, and other related materials that are compatible with one another and with joint substrates under conditions of service and application, as demonstrated by sealant manufacturer based on testing and field experience.

B. Colors of Exposed Joint Sealants: Match adjacent surface.

2.3 ELASTOMERIC JOINT SEALANTS

A. Elastomeric Sealant Standard: Comply with ASTM C 920 and other requirements indicated for each liquid-applied chemically curing sealant in the Elastomeric Joint-Sealant Schedule at the end of Part 3, including those referencing ASTM C 920 classifications for type, grade, class, and uses.

B. Additional Movement Capability: Where additional movement capability is specified in the Elastomeric Joint-Sealant Schedule, provide products with the capability, when tested for adhe-sion and cohesion under maximum cyclic movement per ASTM C 719, to withstand the speci-fied percentage change in the joint width existing at the time of installation and remain in com-pliance with other requirements of ASTM C 920 for uses indicated.

C. Stain-Test-Response Characteristics: Where elastomeric sealants are specified in the Elasto-meric Joint-Sealant Schedule to be nonstaining to porous substrates, provide products that have undergone testing according to ASTM C 1248 and have not stained porous joint substrates indi-cated for Project.

2.4 JOINT-SEALANT BACKING

A. General: Provide sealant backings of material and type that are nonstaining; are compatible with joint substrates, sealants, primers, and other joint fillers; and are approved for applications indicated by sealant manufacturer based on field experience and laboratory testing.

B. Cylindrical Sealant Backings: ASTM C 1330, of type indicated below and of size and density to control sealant depth and otherwise contribute to producing optimum sealant performance:

1. Type C: Closed-cell material with a surface skin.

2. Type O: Open-cell material.

3. Type: Any material indicated above.

JOINT SEALANTS 07920 - 3

C. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant manufac-turer for preventing sealant from adhering to rigid, inflexible joint-filler materials or joint sur-faces at back of joint where such adhesion would result in sealant failure. Provide self-adhesive tape where applicable.

2.5 MISCELLANEOUS MATERIALS

A. Primer: Material recommended by joint sealant manufacturer where required for adhesion of sealant to joint substrates indicated, as determined from preconstruction joint-sealant-substrate tests and field tests.

B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants and sealant backing materials, free of oily residues or other substances capable of staining or harming joint substrates and adjacent nonporous surfaces in any way, and formulated to pro-mote optimum adhesion of sealants with joint substrates.

C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and surfaces adjacent to joints.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine joints indicated to receive joint sealants, with Installer present, for compliance with requirements for joint configuration, installation tolerances, and other conditions affecting joint-sealant performance.

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

3.2 PREPARATION

A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to comply with joint sealant manufacturer's written instructions and the following requirements:

1. Remove all foreign material from joint substrates that could interfere with adhesion of joint sealant, including dust, paints (except for permanent, protective coatings tested and approved for sealant adhesion and compatibility by sealant manufacturer), old joint seal-ants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.

2. Clean porous joint substrate surfaces by brushing, grinding, blast cleaning, mechanical abrading, or a combination of these methods to produce a clean, sound substrate capable of developing optimum bond with joint sealants. Remove loose particles remaining from above cleaning operations by vacuuming or blowing out joints with oil-free compressed air. Porous joint surfaces include the following:

a. Concrete and stucco.

3. Remove laitance and form-release agents from concrete and stucco.

4. Clean nonporous surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants.

a. Metal.

JOINT SEALANTS 07920 - 4

B. Joint Priming: Prime joint substrates where recommended in writing by joint sealant manufac-turer, based on preconstruction joint-sealant-substrate tests or prior experience. Apply primer to comply with joint sealant manufacturer's written instructions. Confine primers to areas of joint-sealant bond; do not allow spillage or migration onto adjoining surfaces.

C. Masking Tape: Use masking tape where required to prevent contact of sealant with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by clean-ing methods required to remove sealant smears. Remove tape immediately after tooling without disturbing joint seal.

3.3 INSTALLATION OF JOINT SEALANTS

A. General: Comply with joint sealant manufacturer's written installation instructions for products and applications indicated, unless more stringent requirements apply.

B. Sealant Installation Standard: Comply with recommendations of ASTM C 1193 for use of joint sealants as applicable to materials, applications, and conditions indicated.

C. Install sealant backings of type indicated to support sealants during application and at position required to produce cross-sectional shapes and depths of installed sealants relative to joint widths that allow optimum sealant movement capability.

1. Do not leave gaps between ends of sealant backings.

2. Do not stretch, twist, puncture, or tear sealant backings.

3. Remove absorbent sealant backings that have become wet before sealant application and replace them with dry materials.

D. Install bond-breaker tape behind sealants where sealant backings are not used between sealants and back of joints.

E. Install sealants by proven techniques to comply with the following and at the same time back-ings are installed:

1. Place sealants so they directly contact and fully wet joint substrates.

2. Completely fill recesses provided for each joint configuration.

3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow op-timum sealant movement capability.

F. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or cur-ing begins, tool sealants according to requirements specified below to form smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure contact and adhesion of sealant with sides of joint.

1. Remove excess sealants from surfaces adjacent to joint.

2. Use tooling agents that are approved in writing by sealant manufacturer and that do not discolor sealants or adjacent surfaces.

3. Provide concave joint configuration per Figure 5A in ASTM C 1193, unless otherwise indicated.

4. Provide flush joint configuration, per Figure 5B in ASTM C 1193, where indicated.

3.4 CLEANING

JOINT SEALANTS 07920 - 5

A. Clean off excess sealants or sealant smears adjacent to joints as the Work progresses by meth-ods and with cleaning materials approved in writing by manufacturers of joint sealants and of products in which joints occur.

3.5 PROTECTION

A. Protect joint sealants during and after curing period from contact with contaminating substances and from damage resulting from construction operations or other causes so sealants are without deterioration or damage at time of Substantial Completion. If, despite such protection, damage or deterioration occurs, cut out and remove damaged or deteriorated joint sealants immediately so installations with repaired areas are indistinguishable from the original work.

3.6 ELASTOMERIC JOINT-SEALANT SCHEDULE

A. Single-Component Nonsag Urethane Sealant: Where joint sealants of this type are indicated, provide products complying with the following:

1. Products:

a. Dynatrol I; Pecora Corporation.

b. Sikaflex - 1a; Sika Corporation.

c. NP 1; Sonneborn Building Products Div., ChemRex Inc.

2. Type and Grade: S (single component) and NS (nonsag).

3. Class: 25.

4. Use Related to Exposure: NT (nontraffic).

5. Uses Related to Joint Substrates: M, A, and, as applicable to joint substrates indicated, O.

6. Applications: Non-traffic locations.

END OF SECTION 07920