CCF Roof Specs 4-3-19.pdf

SPECIFICATIONS

FOR

ROOF REPLACEMENT

CHILD CARE CENTER

53 NORTHEASTERN BOULEVARD

NASHUA, NEW HAMPSHIRE

Prepared by: Federal Aviation Administration

ATO Enroute Engineering Service Eastern Service Area (AJW-E12A)

ROOF REPLACEMENT FEBRUARY 2019

NASHUA, NH (ZBW) CHILD CARE FACILITY FAA-ZBW-1605409

Specifications Titles -1

INCLUDED SPECIFICATIONS

01010 SUMMARY OF WORK

02 07 00 SELECTIVE DEMOLITION

07 54 23 THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING

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 selected building elements.

2. Patching and repairs.

1.2 DEFINITIONS

A. Remove: Remove and legally dispose of items except those indicated to be reinstalled, salvaged, or to remain the Government's property.

B. Salvage: Items indicated to be salvaged remain the Government's property. Remove, clean, and pack or crate items to protect against damage. Identify contents of containers and deliver to Government's designated storage area.

C. Existing to Remain: Protect construction indicated to remain against damage and soiling during selective demolition. When permitted by the COR, items may be removed to a suitable, protected storage location during selective demolition and then cleaned and reinstalled in their original locations.

1.3 MATERIALS OWNERSHIP

A. Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indicated to remain the Government's property, demolished materials shall become the Contractor's property and shall be removed from the site with further disposition at the Contractor's option.

1.4 SUBMITTALS

A. Schedule and provide applicable documentation regarding selective demolition activities indicating the following:

1. Detailed sequence of selective demolition and removal work, with starting and ending dates for each activity.

2. Coordination of shut-off, capping, and continuation of utility services.

3. Use of freight elevator and stairs.

4. Detailed sequence of selective demolition and removal work to ensure uninterrupted progress of

Government's on-site operations.

5. Coordination of Government's continuing occupancy of portions of existing building and of

Government's partial occupancy of completed Work.

B. Record drawings at Project closeout: Identify and accurately locate capped utilities, if any, other electrical and / or mechanical conditions.

SELECTIVE DEMOLITION 02070 - 2

1.5 QUALITY ASSURANCE

A. Demolition Firm Qualifications: Engage an experienced firm that has successfully completed selective demolition Work similar to that indicated for this Project.

B. Regulatory Requirements: Comply with governing EPA notification regulations and all of OSHA’s standards before starting selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

1.6 PROJECT CONDITIONS

A. Government will occupy areas of the building immediately adjacent to selective demolition area.

Conduct selective demolition so that Government's operations will not be disrupted. Provide not less than 10-calendar days notice to Government of activities that will affect Government's operations.

B. Storage or sale of removed items or materials on-site will not be permitted.

1.7 SCHEDULING

A. Arrange selective demolition schedule so as not to interfere with Government's on-site operations.

PART 2 - EXECUTION

2.1 EXAMINATION

A. Verify that utilities have been disconnected and capped.

B. Survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

C. Inventory and record the condition of items to be removed and reinstalled and items to be removed and salvaged.

D. When unanticipated mechanical, electrical, or structural elements that conflict with the intended function or design are encountered, investigate and measure the nature and extent of the conflict.

Promptly submit a written report to the COR.

E. Perform surveys as the Work progresses to detect hazards resulting from selective demolition activities.

2.2 UTILITY SERVICES

A. Maintain existing utilities in service and protect them against damage during selective demolition operations.

1. Do not interrupt existing utilities serving occupied or operating facilities, except when authorized by COR. Provide temporary services during interruptions to existing utilities, as acceptable to

COR.

a. Provide not less than 7 calendar days notice to Government if shutdown of service is required during changeover.

B. Utility Requirements: Locate, identify, disconnect, and seal or cap off indicated utility services serving building to be selectively demolished.

SELECTIVE DEMOLITION 02070 - 3

1. Government will arrange to shut off indicated utilities, if possible, when requested by Contractor.

2. Where utility services are required to be removed, relocated, or abandoned, provide bypass connections to maintain continuity of service to other parts of the building before proceeding with selective demolition.

2.3 PREPARATION

A. Conduct demolition operations and remove debris to ensure minimum interference with roads, streets, walks, and other adjacent occupied and used facilities.

1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities without permission from COR. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.

B. Conduct demolition operations to prevent injury to people and damage to adjacent buildings, facilities, and equipment to remain. Ensure safe passage of people around selective demolition areas.

2.4 SELECTIVE DEMOLITION

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

1. Proceed with selective demolition systematically. Complete selective demolition work without disturbing structural supporting members.

2. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction. To minimize disturbance of adjacent surfaces, use hand or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain.

3. Cut or drill from the exposed or finished side into concealed surfaces to avoid marring existing finished surfaces.

4. Remove structural framing members and lower to ground by method suitable to avoid free fall and to prevent ground impact or dust generation.

5. Locate selective demolition equipment throughout the structure and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing.

6. Dispose of demolished items and materials promptly.

7. Return elements of construction and surfaces to remain to condition existing before start of selective demolition operations.

2.5 PATCHING AND REPAIRS

A. Promptly patch and repair holes and damaged surfaces caused to adjacent construction by selective demolition operations.

B. Where repairs to existing surfaces are required, patch to produce surfaces suitable for new materials.

1. Completely fill holes and depressions in existing masonry walls to remain with an approved masonry patching material, applied according to manufacturer's printed recommendations.

C. Restore exposed finishes of patched areas and extend finish restoration into adjoining construction to remain in a manner that eliminates evidence of patching and refinishing.

SELECTIVE DEMOLITION 02070 - 4

D. Patch and repair floor and wall surfaces in the new space where demolished walls extend one finished area into another. Provide a flush and even surface of uniform color and appearance.

1. Closely match texture and finish of existing adjacent surface.

2. Patch with durable seams that are as invisible as possible. Comply with specified tolerances.

3. Where patching smooth painted surfaces, extend final paint coat over entire unbroken surface containing the patch after the surface has received primer and second coat.

4. Remove existing floor and wall coverings and replace with new materials, if necessary, to achieve uniform color and appearance.

5. Inspect and test patched areas to demonstrate integrity of the installation, where feasible.

2.6 DISPOSAL OF DEMOLISHED MATERIALS

A. General: Promptly dispose of demolished materials. Do not allow demolished materials to accumulate on-site.

B. Burning: Do not burn demolished materials.

C. Disposal: Transport demolished materials off Government's property and legally dispose of them.

D. Provide documentation of the removal of R-22 from the existing roof top units.

2.7 CLEANING

A. Sweep daily and as necessary the area of work on completion of selective demolition operation.

B. Vacuum daily and as necessary the carpeted area impacted by the work, and minimize dust residue throughout facility areas impacted by construction activities.

C. Change filters on existing air-handling equipment in demolition areas upon completion of selective demolition operations or more often as needed.

END OF SECTION 02070

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 1

ROOF TOP UNIT AND ROOF REPLACEMENT MARCH 2018

SECTION 07 54 23 - THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. The intent of this roof specification is for low-slope roofs. Unless specifically modified, it is not intended for pre-engineered buildings that previously had metal panel roofs, roofs that are of slope greater than 1/12, or for use over existing systems.

B. Section Includes:

1. Electromagnetic induction welded thermoplastic polyolefin (TPO) roofing system.

2. Induction fastening system for (TPO) membrane roofing.

3. Substrate board.

4. Vapor retarder.

5. Roof insulation.

6. Cover board.

7. Walkways.

C. Related Requirements:

1. Section 06 10 00 "Rough Carpentry" for wood nailers, curbs, and blocking; and for wood-based, structural-use roof deck panels.

2. Section 07 72 00 "Roof Accessories" for Roof curbs, equipment supports, roof hatches, heat and smoke vents, gravity ventilators, pipe supports, roof walkways, and preformed flashing sleeves.

3. Section 07 71 00 "Roof Specialties" for manufactured copings and roof edge flashings.

4. Section 07 92 00 "Joint Sealants" for joint sealants, joint fillers, and joint preparation.

5. Section 22 14 23 "Storm Drainage Piping Specialties" for roof drains.

6. Section 07 015 0.19 "Preparation for Reroofing" for Preparation for low-slope reroofing -tear-off and re-cover situations.

7. Section 05 50 00 “Metal Fabrications” for reinforcements, braces, ladders and other metal items exposed on the roof.

1.3 DEFINITIONS

A. Roofing Terminology: Definitions in ASTM D 1079 and glossary in NRCA's "The NRCA Roofing Manual: Membrane Roof Systems" apply to Work of this Section.

1.4 PREINSTALLATION MEETINGS

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 2

A. Preinstallation Roofing Conference: Conduct conference at Project site.

1. Meet with the Contracting Officer’s Representative (COR),the General Contractor, Gov-ernment insurer if applicable, testing and inspecting agency representative, roofing in-staller, roofing system manufacturer's representative, deck installer, air barrier installer, and installers whose work interfaces with or affects roofing, including installers of roof accessories and roof-mounted equipment.

2. Present and review the Roofing Work Plan including 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. Examine existing deck substrate conditions and finishes for compliance with require-ments, including flatness and fastening. Verify condition of metal deck and determine if replacement in part or in whole is required. If deck is composite steel/ concrete verify condition of concrete surface and moisture content. Determine if concrete patching or leveling compound is required or if the deck requires a drying time.

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

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

7. Review governing regulations and requirements for insurance and certificates if applica-ble.

8. Review temporary protection requirements for roofing system during and after installa-tion.

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

10. Review mitigation procedures for noise and fumes.

1.5 MOCKUPS

A. Build mockups to verify selections made under Sample submittals, to demonstrate odor aspects during installation, and to set quality standards for materials and execution.

1. Build mockup of typical Roof area on the ground away from the facility.

2. Build mockups 48 inches by 48 inches.

a. Include each type of building face connections.

b. Include each type of roof edge condition.

c. Include typical roof penetrations.

d. Use of all adhesives, cleaners, primers, sealants, or any other liquid chemical prod-uct (must be applied while observed by the COR).

3. Review the mockup directly after each material is installed with COR and roofing system manufacturer's representative to ensure odor levels are acceptable to the COR.

4. Clean exposed faces of mockups with masonry cleaner as indicated.

5. Protect accepted mockups from the elements with weather-resistant membrane.

6. Approval of mockups does not constitute approval of deviations from the Contract Doc-uments contained in mockups unless COR specifically approves such deviations in writ-ing.

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1.6 ACTION SUBMITTALS

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 4

A. Product Data: For each type of product.

1. For insulation and roof system component fasteners, include copy of FM Approvals' RoofNav listing.

2. Product Data: For adhesives and sealants, including VOC content information.

3. Safety Data Sheets: For each material used.

4. Laboratory Test Reports: For adhesives and sealants, indicating compliance with re-quirements for low-emitting materials.

5. Induction fastening system: Installation instructions.

6. Work Plan: Describing methods of installation, daily schedule, mitigation of fumes, miti-gation of noise, layout areas, roof loading, material storage, temporary protection, site cleaning, tool storage, and other aspects of the project. This plan will be reviewed as part of the pre-installation conference.

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

1. Layout and thickness of insulation.

2. Base flashings and membrane termination details.

3. Flashing details at penetrations.

4. Tapered insulation layout, thickness, and slopes.

5. Roof plan showing orientation of steel roof deck and orientation of roof membrane, fas-tening spacing, and patterns for induction fastened roofing system.

6. Insulation fastening patterns for corner, perimeter, and field-of-roof locations.

7. Tie-in with adjoining air barrier.

C. Samples for Verification: For the following products:

1. Roof membrane and flashings, of color required.

2. Walkway pads or rolls, of color required.

D. Wind Uplift Resistance Submittal: For roofing system, signed and sealed by Registered Engi-neer licensed in the jurisdiction, showing calculations, FM Roofing System Designation, and indicating compliance with wind uplift performance requirements. Calculations should be done according to FM standards and include the following:

1. Roof Windspeed based on the local meteorological data and standard speed listed for the area in the ASCE 7.10.

2. Zone calculation breakdown for all areas in the following format:

a. Zone 1 (Roof Area Field): Listed in lbf/sq.

b. Zone 2 (Roof Area Perimeter): Listed in lbf/sq.

1) Location: Dimension from roof edge to inside roof edge.

c. Zone 3 (Roof Area Corners): Listed in lbf/sq.

1) Location: The dimension in each direction from each building corner.

3. Summary confirming that the standard roof meeting Fire/Windstorm Classification of

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 5

Class 1A-135 will exceed the requirements. If the calculations indicate the Class 1A-135

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 6

would be exceeded then they should confirm the Class 1A-195 will meet the require-ments. If the calculations confirm that both of the standard roofs are exceeded then a recommendation of a system to meet the requirements should be described along with the classification and FM system number for COR approval.

E. Roofing Maintenance Program Submittal: For Roofing Maintenance Program, documentation indicating program and term compliance including but not limited to the following:

1. Name, address, and contact information for roof consultant.

2. Proposed Roofing Maintenance Program.

3. Sample Contract: for Roofing Maintenance Program.

1.7 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer and testing agency.

B. 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.

C. Product Test Reports: For roof membrane and insulation, for tests performed by a qualified test-ing agency, indicating compliance with specified requirements.

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

E. Field Test Reports:

1. Concrete internal relative humidity test reports for existing and new slabs.

2. Fastener-pullout test results and manufacturer's revised requirements for fastener pat-terns.

F. Field quality-control reports.

G. Sample Warranties: For manufacturer's installer, and project special warranties.

1.8 CLOSEOUT SUBMITTALS

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

B. Warranty Card: For roofing system to post in building at roof access.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 7

1. Remove old and outdated warranty cards.

2. Install new warranty card at location directed by the COR.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 8

3. The warranty card shall include the following information at a minimum:

a. Manufacturer.

b. Manufacturer contact information.

c. Type of roof.

d. FM System Number.

e. Date of installation.

f. Warranty numbers if applicable.

g. Roof installer.

h. Roof installer contact information.

C. Certified statement from existing roof membrane manufacturer stating that existing roof warran-ty has not been affected by Work performed under this Section.

D. The complete set of executed warranties as listed below in “Warranty” Paragraph.

E. Roofing Maintenance Program: executed contract for Roofing Maintenance Program and pro-posal for Follow-On Roofing Maintenance Program.

1.9 QUALITY ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer that is UL listed and listed in FM Ap-provals' RoofNav for roofing system identical to that used for this Project. The Manufacturer’s Field Representative shall be onsite a minimum of three visits ( beginning, middle, and end of each roof installation) to ensure the product is capable of warranty when complete.

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 manufactur-er's special warranty. The firm shall employ persons trained to operate induction fastening sys-tem for installation of thermoplastic membrane roofing.

C. Inspector Qualifications: Provide qualifications of a roofing consultant who shall be responsible for roofing system inspections to insure a quality installation. Inspector shall be an independent testing professional with a minimum 5 years’ experience in similar project size, complexity and system to conduct testing indicated certified (by NRCIA, HAAG or other certifying organiza-tion specializing in roof inspector training). This inspector shall be present onsite a minimum of once a week during the roof installation process as scheduled by the General Contractor with approval by the COR. This should include the initial start of installation for each layer of mate-rial for the system.

D. The Contractor shall engage the testing agency which employs the independent inspector with qualifications listed above. The Contractor is responsible for scheduling regular inspections during the application of the roofing materials and cover associated costs of the inspections.

1.10 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 list-

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 9

ing agency markings, and directions for storing and mixing with other components.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 -

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 manufac-turer'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 de-flection of deck.

1.11 FIELD CONDITIONS

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

1.12 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, cover boards, vapor retarder, substrate board, and other components of roofing system.

2. This warranty has no monetary limit for labor and materials during the time period indi-cated below.

3. This warranty should cover any damages occurring for the standard windspeed design criteria for the individual site as calculated by the Contractors Engineer.

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

B. Puncture Resistance Warranty: In addition to Special Warranty, Contractor agrees to repair and replace all or part of components of membrane roofing system caused by accidental punctures.

1. This warranty has no monetary limit for labor and materials during the time period indi-cated below.

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

C. Special Project Warranty: Submit roofing Installer's warranty, signed by Installer, covering the Work of this Section, including all components of roofing system such as roof membrane, base flashing, roof insulation, fasteners, cover boards, substrate boards, vapor retarders, and walkway products, for the following warranty period:

1. Warranty Period: Two years 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 defec-tive 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 G 152, ASTM G 154, or ASTM G 155.

2. Impact Resistance: Roof membrane shall resist impact damage when tested according to

ASTM D 3746, ASTM D 4272, or the "Resistance to Foot Traffic Test" in FM Approv-als 4470.

B. Material Compatibility: Roofing materials shall be obtained from a single source or be compati-ble with one another and adjacent materials under conditions of service and application re-quired, as demonstrated by roof membrane manufacturer based on testing and field experience.

C. Wind Uplift Resistance: Contractor shall obtain the necessary information from onsite inspec-tion or design documents and have a registered engineer design roofing system to resist the fol-lowing wind uplift pressures when tested according to FM Approvals 4474, UL 580, or

UL 1897:

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 roof-ing system, and shall be listed in FM Approvals' RoofNav for Class 1 or noncombustible con-struction, as applicable. Identify materials with FM Approvals Certification markings.

1. Fire/Windstorm Classification: [Class 1A-135][ Class 1A-195].

2. Hail-Resistance Rating: [SH] [VSH].

3. Provide RoofNav System number from Factory Mutual describing the entire system from substrate board thru the TPO membrane. FM considers the vapor retarder optional so it can be omitted from the system when obtaining the number.

E. Florida Building Code (2014) and County Requirements. Provide roofing system that complies with the Florida Building Code and [Dade County][Nassau County] requirements for materi-als and installation and to comply with wind speed of 120 miles per hour.

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. Exterior Fire-Test Exposure: ASTM E 108 or UL 790, Class A; for application and roof slopes indicated; testing by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

2.2 THERMOPLASTIC POLYOLEFIN (TPO) ROOFING

A. TPO Sheet: ASTM D 6878/D 6878M, internally fabric- or scrim-reinforced, TPO sheet.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Johns Man-ville; a Berkshire Hathaway company; JM TPO – 80 MIL or a comparable product by one of the following:

a. GAF.

b. Carlisle SynTec Incorporated.

c. Firestone Building Products.

2. Source Limitations: Obtain components for roofing system, roof insulation, and fasteners for membrane roofing system from roof membrane manufacturer or manufacturers ap-proved by roof membrane manufacturer.

3. Thickness: 80 mils, nominal.

4. Exposed Face Color: White.

5. Must be compatible with electromagnetic induction welding fastening system.

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 if lo-cal jurisdiction requirements exceed those listed below.

2. Adhesives and sealants shall comply with the following limits for VOC content:

a. Contact Adhesives: 80 g/L.

b. Other Adhesives: 250 g/L.

c. Single-Ply Roof Membrane Sealants: 450 g/L.

d. Nonmembrane Roof Sealants: 300 g/L.

3. Sealant use and allowed locations will be confirmed by COR, shall have low odor, and be limited to use only at roof drains and edge sealant for cut edges of the mem-brane sheets.

B. Sheet Flashing: Manufacturer's standard unreinforced TPO sheet flashing, (1.4 mm)60 mils thick, minimum, unreinforced thermoplastic polyolefin sheet flashing, of same color as TPO sheet.

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

D. Roof System Vents: As recommended by roof membrane manufacturer.

1. Size: Not less than 4-inch diameter.

E. Bonding Adhesive: Not Used.

F. Metal Termination Bars: Manufacturer's standard, predrilled stainless steel or aluminum bars, approximately 1 by 1/8 inch thick; with anchors. For use on top of parapets and on metal wall structures.

G. Fasteners: Factory-coated steel fasteners and induction welding plates complying with corro-sion-resistance provisions in FM Approvals 4470, designed for fastening roofing components to substrate, and acceptable to roofing system manufacturer.

1. Secures roof materials to 22-gauge minimum steel deck or 4 inch thick steel/ concrete composite deck.

a. Steel deck penetration: 3/4" minimum.

b. Composite Deck penetration: 1 1/2" minimum.

c. Reinforced concrete deck penetration: 1 1/2" minimum.

2. Head: #3 Phillips truss head.

3. Diameter: 0.435 inch.

4. Thread Diameter: 0.275 inch.

5. Shank Diameter: 0.202 inch.

6. Length: Sufficient length to penetrate steel deck at top flute the recommended depth.

7. Drill point: Heat treated.

H. Induction Welding Plate

1. Secures roof insulation and TPO membrane roofing.

2. Type: Use TPO-Type

3. Plates: Coated with membrane formulated for TPO membrane roofing by membrane manufacturer.

4. Color: Gold.

5. Diameter: 3 inches.

6. Thickness: 22 gauge.

7. Material: Coated Galvalume.

8. Coating Corrosion Resistance: Meets FM Approval Standard 4470 criteria.

9. Profile: Recessed center and raised flat bonding surface.

10. FM approved.

I. 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 TOOLS

A. Induction Welding Tools: One of the following may be used with the TPO Roofing Membrane Manufacturer’s approval:

1. Rhinobond Induction Welding Tool.

2. Isoweld 300 Induction Welding Tool.

B. Requirements:

1. Description: Portable, electromagnetic induction welder that bonds underside of thermo-plastic membrane roofing to top of coated plates using microprocessor-controlled, elec-tromagnetic induction welding.

THERMOPLASTIC-POLYOLEFIN (TPO) ROOFING 07 54 23 - 10

2. Typical Weld Time: Approximately 5 seconds per plate, depending on ambient tempera-ture, membrane roofing thickness, and power source.

3. Power: 5,000 Watt generator minimum, 110 to 125 V, 60 Hz, stable energy source.

4. Power Cord: 12 gauge, 100 feet maximum power cord.

C. Magnetic cooling clamps.

2.5 SUBSTRATE BOARDS

A. At concrete decks not adjacent to or level with steel decks the substrate board is not required.

Note this changes the FM Roof Assembly Number.

B. Substrate Board: ASTM C 1177/C 1177M, glass-mat, water-resistant gypsum board or

ASTM C 1278/C 1278M, fiber-reinforced gypsum board.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Georgia- Pacific Gypsum LLC; Dens Deck or a comparable product by one of the following:

a. CertainTeed Corporation.

b. National Gypsum Company.

c. USG Corporation.

2. Thickness: Type X, 5/8 inch thick.

3. Surface Finish: Unprimed.

4. Tape: Pressure-sensitive tape of type recommended by the substrate board manufacturer for sealing joints and penetrations in the substrate board.

5. Closed foam backer rod for larger gaps.

C. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening substrate board to roof deck.

2.6 VAPOR RETARDER

A. Self-Adhering-Sheet Vapor Retarder: ASTM D 1970/D 1970M, polyethylene film laminated to layer of SBS rubberized asphalt compound, cold applied, with slip-resisting surface and release paper backing.

1. Manufacturers: Subject to compliance with requirements, provide products by the follow-ing:

a. JM – Vapro Barrier SA.

b. Henry – Blueskin SA.

B. Products must meet the following requirements:

1. Must meet ASTM D E96 for permeability.

2. Maximum Permeance Rating: .08 perms.

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3. Thickness: 40 mils minimum.

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C. Primer not required when used in a mechanically attached system between cover board and ridged insulation.

D. Accessories.

1. Tape: Pressure-sensitive tape of type recommended by vapor-retarder manufacturer for sealing joints and penetrations in vapor retarder.

E. Installation locations – Only installed in ASHRAE/ DOE Climate Zones 4-8. Not required in ASHRAE/ DOE Climate Zones 1-3.

2.7 ROOF INSULATION

A. General: Preformed roof insulation boards manufactured or approved by TPO roof membrane manufacturer, and approved for use in FM Approvals' RoofNav-listed roof assemblies.

B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class 1, Grade 3, felt or glass-fiber mat facer on both major surfaces.

C. Basis-of-Design Product: Subject to compliance with requirements, provide Johns Manville;

ENRGY 3 or a comparable product by one of the following:

1. Atlas Roofing Corporation.

2. Carlisle SynTec Incorporated.

3. Firestone Building Products.

4. GAF.

5. Compressive Strength: 25 psi.

6. Size: 48 by 96 inches.

7. Thickness:

a. Base Layer: 2-1/2 inches.

b. Upper Layer: 3 inches .

c. Required performance factor of total insulation thickness: R-30 Minimum using

S770-09 LTTR test method.

D. Tapered Insulation: Provide factory-tapered insulation boards.

1. Material: Match roof insulation.

2. Minimum Thickness: 1/4 inch.

3. Slope:

a. Roof Field: 1/4 inch per foot unless otherwise indicated on Drawings.

b. Saddles and Crickets: 1/2 inch per foot unless otherwise indicated on Drawings.

2.8 INSULATION ACCESSORIES

A. General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatibility with other roofing system components.

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B. Fasteners: Factory-coated steel fasteners with metal or plastic plates complying with corrosion-resistance provisions in FM Approvals 4470, designed for fastening roof insulation and cover boards to substrate, and acceptable to roofing system manufacturer.

C. Cover Board: ASTM C 1177/C 1177M, glass-mat, water-resistant gypsum board.

1. Products: Subject to compliance with requirements and approval of the roof membrane manufacturer, provide one of the following:

a. CertainTeed Corporation; GlasRoc Roof Board.

b. Georgia-Pacific Gypsum LLC; Dens Deck.

c. National Gypsum Company; DEXcell FA Glass Mat Roof Board.

d. USG Corporation; Securock Glass Mat Roof Board.

2. Thickness: 5/8 inch.

3. Surface Finish: Unprimed.

D. Tape: Pressure-sensitive tape of type recommended by Insulation manufacturer for sealing joints and penetrations in the insulation.

2.9 WALKWAYS

A. Flexible Walkways: Factory-formed, nonporous, heavy-duty, slip-resisting, surface-textured walkway pads or rolls, approximately 3/16 inch thick capable of being welded to TPO roofing membrane, and acceptable to roofing system manufacturer.

1. Size: Approximately36 by 60 inches.

2. Color: Contrasting with roof membrane.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with the COR, installer, roofing system manufactur-er's technical personnel and the contractor’s testing and inspection agency present, for compli-ance with requirements and other conditions affecting performance of the Work.

1. Determine existing roof slope by structure if any. If not then roof slope by insulation will be necessary to meet FM Requirements for drainage of the roof.

a. Preferred minimum slope for main roof to drain system: 1/4" per foot.

b. Preferred minimum slope for crickets and saddles: 1/2" per foot

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

3. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at pene-trations and terminations and that nailers match thicknesses of insulation.

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4. Verify that surface plane flatness and fastening of steel roof deck complies with require-ments in Section 05 31 00 "Steel Decking."

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5. Verify that the existing steel roof deck is free of rust, dry, not deformed and acceptable for installation of the roof system

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

3.2 PREPARATION

A. Close and seal off all fresh air intakes, air exhaust, fans, and louvers where dust and odors from the roofing activities could enter the building with polyethylene sheeting.

B. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing system in-stallation according to roofing system manufacturer's written instructions. Remove sharp projec-tions.

C. Examine materials delivered to the site with the COR, installer, roofing system manufacturer's technical personnel and the contractor’s testing and inspection agency and verify types of mate-rials comply with specifications, submitted shop drawings, and product data.

D. 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.

E. Perform fastener-pullout tests according to roof system manufacturer's written instructions.

1. Submit test result within 24 hours after performing tests.

a. Include manufacturer's requirements for any revision to previously submitted fas-tener patterns required to achieve specified wind uplift requirements.

F. When applying new roofing system to the standard ARTCC Administration Area Roof, ensure that existing masonry weeps will not be covered by the new system. If the depth of the new system exceeds the gravel stop, masonry weeps, and masonry flashing then those items will have to be relocated to a level 8” Minimum above the new system to allow for proper flashing.

Existing weeps and anchor slots for gravel stops should be filled with grout.

G. If air intake/exhaust may not be closed for the duration of the installation then specialized

HEPA or similar filters based on the type of coolant the system uses should be applied to the openings.

H. Prime all floor drains to ensure no open traps connected to plumbing stacks.

I. Seal off windows, doors, and other openings overlooking or adjacent to the roof being replaced with poly air barrier sheets taped at seams and wrapped at corners.

J. Verify initially and monitor for changes the wind speed and direction several times per shift to ensure smells do not enter facility from a location remote from the immediate work area.

K. Daily Cleaning: The Contractor must maintain the job site in a neat and orderly condition.

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1. The Contractor must secure all their material from damage and being blown about by the wind.

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2. The Contractor must contain dust in their immediate work areas in order to maintain a dust-free facility.

3. The Contractor must maintain their work areas at least as follows.

a. Daily cleanup of all rubbish and waste, including removal of tools, equipment, and materials not required for the work in progress.

4. The Contractor must provide and maintain cleaning supplies and equipment, such as rags, brooms, buckets, mops, and vacuums, throughout the duration of the project, including for immediate cleanup of spills.

5. The Contractor must provide and maintain containers on site for the collection of waste materials, debris, and rubbish. The Contractor must store volatile waste in an approved covered metal container for fire protection. Use of the Government's existing trash con-tainers on site for the work is prohibited.

6. The Contractor must haul all project waste off site for proper disposal; refer to additional requirements in Section 01 74 19 Construction Waste Management. Burning or burying waste on site is prohibited. Disposal of volatile, harmful, or dangerous materials on the ground or in storm or sanitary sewer systems or drainages is prohibited. Dispose of mate-rials lawfully.

7. Keep installed work clean. Clean installed surfaces according to written instructions of manufacturer or fabricator of product installed, using only cleaning materials specifically recommended. If specific cleaning materials are not recommended, use cleaning materi-als that are not hazardous to health or property and that will not damage exposed surfac-es.

3.3 ROOFING INSTALLATION, GENERAL

A. Install roofing system according to roofing system manufacturer's written instructions, FM Ap-provals' RoofNav assembly requirements, and FM Global Property Loss Prevention Data Sheet 1-29.

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. Re-move and discard temporary seals before beginning Work on adjoining roofing.

3.4 SUBSTRATE BOARD INSTALLATION

A. At concrete decks not adjacent to or level with steel decks the substrate board is not required to be installed.

B. Install substrate board with long joints in continuous straight lines, with end joints staggered not less than 24 inches in adjacent rows.

1. At steel roof decks, install substrate board at right angle to flutes of deck.

a. Locate end joints over crests of steel roof deck.

2. Tightly butt substrate boards together.

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3. Cut substrate board to fit tight around penetrations and projections, and to fit tight to in-tersecting sloping roof decks.

4. Fasten substrate board to top flanges of steel deck with sufficient fasteners to hold boards in place for taping and sealing.

5. Continuously seal joints, end conditions, terminations, obstructions, and penetrations to prevent air movement.

3.5 VAPOR RETARDER INSTALLATION

A. Self-Adhering-Sheet Vapor Retarder: Install self-adhering-sheet vapor retarder over area to re-ceive vapor retarder, side and end lapping each sheet a minimum of 3-1/2 and 6 inches, respec-tively.

1. Extend vertically up parapet walls and projections to a minimum height equal to height of insulation and cover board.

2. Seal laps by rolling.

B. Completely seal vapor retarder at terminations, obstructions, and penetrations to prevent air movement into roofing system.

3.6 INSULATION INSTALLATION

A. Coordinate installing roofing system components so insulation is not exposed to precipitation or left exposed at end of workday.

B. Comply with roofing system and roof insulation manufacturer's written instructions for in-stalling roof insulation.

C. Install insulation under area of roofing to achieve required thickness. Install two or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches in each direction.

D. Installation Over Metal Decking:

1. Install base layer of insulation with joints staggered not less than 24 inches in adjacent rows.

a. Locate end joints over crests of decking.

b. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

c. Make joints between adjacent insulation boards not more than 1/4 inch in width.

d. At internal roof drains, slope insulation to create a square drain sump with each side equal to the diameter of the drain bowl plus 24 inches.

1) Trim insulation so that water flow is unrestricted.

e. Fill gaps exceeding 1/4 inch with insulation.

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f. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations.

g. Loosely lay base layer of insulation units over substrate.

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1) Fasten insulation according to requirements in FM Approvals' RoofNav for specified Windstorm Resistance Classification.

2. Install upper layers of insulation and tapered insulation with joints of each layer offset not less than 12 inches from previous layer of insulation.

a. Staggered end joints within each layer not less than 24 inches in adjacent rows.

b. Install with long joints continuous and with end joints staggered not less than 12 inches in adjacent rows.

c. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

d. Make joints between adjacent insulation boards not more than 1/4 inch in width.

e. At internal roof drains, slope insulation to create a square drain sump with each side equal to the diameter of the drain bowl plus 24 inches.

f. Fill gaps exceeding 1/4 inch with insulation.

g. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations.

E. Installation Over Concrete Decks:

1. Install base layer of insulation with end joints staggered not less than 12 inches (305 mm) in adjacent rows.

a. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

b. Make joints between adjacent insulation boards not more than 1/4 inch (6 mm) in width.

c. At internal roof drains, slope insulation to create a square drain sump with each side equal to the diameter of the drain bowl plus 24 inches (610 mm).

d. Fill gaps exceeding 1/4 inch (6 mm) with insulation.

e. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetra-tions.

f. Loosely lay base layer of insulation units over substrate.

1)

2. Install upper layers of insulation and tapered insulation with joints of each layer offset not less than 12 inches (305 mm) from previous layer of insulation.

a. Install with long joints continuous and with end joints staggered not less than 12 inches (305 mm) in adjacent rows.

b. Trim insulation neatly to fit around penetrations and projections, and to fit tight to intersecting sloping roof decks.

c. Make joints between adjacent insulation boards not more than 1/4 inch (6 mm) in width.

d. At internal roof drains, slope insulation to create a square drain sump with each side equal to the diameter of the drain bowl plus 24 inches (610 mm).

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e. Fill gaps exceeding 1/4 inch (6 mm) with insulation.

f. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetra-tions.

g. Loosely lay each layer of insulation units over substrate.

3.7 INSTALLATION OF COVER BOARDS

A. Install cover boards over insulation with long joints in continuous straight lines with end joints staggered between rows. Offset joints of insulation below a minimum of 6 inches in each direc-tion and tightly butt joints together.

1. Trim cover board neatly to fit around penetrations and projections, and to fit tight to in-tersecting sloping roof decks.

2. At internal roof drains, conform to slope of drain sump.

a. Trim cover board so that water flow is unrestricted.

B. Mechanically Fastened Cover Board: Secure to deck using mechanical fasteners specifically designed and sized for fastening the specified cover board and roof insulation to the deck type.

1. Fasten cover board to top flanges of steel deck according to recommendations in FM Ap-provals' "RoofNav" and FM Global Loss Prevention Data Sheet 1-29 for specified Wind-storm Resistance Classification to resist uplift pressure at corners, perimeter, and field of roof.

2. Fasteners should penetrate the cover board, insulation layers, vapor barrier (if present) the substrate board and into roof decking material as follows:

a. Steel deck penetration: 3/4" minimum.

b. Composite Deck penetration: 1 1/2" minimum.

c. Reinforced concrete deck penetration: 1 1/2" minimum.

3. Induction welded plates for membrane.

a. Place plates in grid pattern on roof insulation in accordance with thermoplastic membrane roofing section.

b. Install required number of plates and fasteners per 4-foot by 8-foot insula-tion/cover board or over purlins to achieve membrane roofing manufacturer’s re-quired FM rating.

c. Install plates in straight rows in at least 1 direction in accordance with membrane roofing manufacturer’s prescriptive fastening patterns for roof field, perimeter, and corners. Plates may need to be adjusted slightly in order to hit top flutes of roof deck.

d. Secure plates in accordance with membrane roofing manufacturer’s instructions using specified fasteners and in accordance to roofing manufacturer’s prescriptive fastening patterns for roof field, perimeter, and corners.

e. Do not overdrive fasteners on plates.

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f. Install plates and fasteners tight and flat to roof insulation with no dimpling of in-sulation board, or cover board surface.

3.8 INDUCTION WELDED ROOFING INSTALLATION

A. Lay membrane roofing over roof insulation and fastened plates according to roofing system manufacturer's written instructions.

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

C. For in-splice attachment, install roof membrane with long dimension perpendicular to steel roof deck flutes.

D. Start installation of roofing in presence of the COR, the roofing system manufacturer's technical personnel and testing and inspection agency.

E. Accurately align roof membrane, and maintain uniform side and end laps of minimum dimen-sions required by manufacturer. Stagger end laps.

F. Mechanically fasten the roof membrane securely at terminations, penetrations, and perimeter of roofing.

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 manufacturer’s cut edge sealant to seal cut edges of roof membrane and flashing sheet.

a. Test in Morning prior to start of the work day.

b. Test at midday to ensure conditions have not changed.

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

3. Repair…