Division 7-Thermal.pdf

102-029 07 52 00-1

DIVISION 7 – THERMAL AND MOISTURE PROTECTION 1

SECTION 07 52 00 3

MODIFIED BITUMEN ROOFING SYSTEM 4

A. GENERAL 6

RELATED WORK SPECIFIED ELSEWHERE 8

Lightweight Cellular Insulating Concrete System Section 03 52 16.13 10 Wood Nailers and Blocking Section 06 10 00 11 Membrane Roofing System (TPO) Section 07 54 23 12 Roof Accessories Section 07 72 00 13

SCOPE 15

Extent of built-up roofing (BUR) system work as indicated on the Drawings and by provisions of this Section is 17 defined to include roofing and accessories integrally related to roofing installation at existing concrete roof deck 18 areas shown on the Drawings. This work occurs only below areas shown on the Drawings to receive lightweight 19 cellular insulating concrete (LCIC) system. 20

REFERENCES 22

NRCA Roofing and Waterproofing Manual, Fifth Edition, 2001 – National Roofing Contractor’s Association. 24 Manufacturer’s Modified Bitumen Roofing Product Data and Application Guide, latest edition. 26 Torch Applied Roofing Do’s and Don’ts – Asphalt Roofing Manufacturers Association (ARMA), latest edition. 28 Certified Roofing Torch Welding Applicator (CERTA) Program – Midwest Roofing Contractor’s Association 30 (MRCA), latest edition. 31 FM Global Roof Nav (www.roofnav.fmglobal.com). 33 FM Global Loss Prevention Data Sheets 1-28 and 1-29. 35 Underwriter’s Laboratories, Inc. – Building Materials Directory, latest edition. 37

QUALITY ASSURANCE 39

Provide materials bearing Underwriters Laboratories (U.L.) classification marking on bundles, packages, or 41 containers indicating that materials have been produced under U.L.’s classification and follow-up service. 42 Provide roofing system and roof covering materials that have been evaluated by FM Global for fire spread and 44 bearing FM Global Class 1 approval markings. 45 A single Roofing Contractor (roofer) shall perform the work of this section and shall be a firm with not less than five 47 years of successful experience in installation of built-up roofing systems and which is acceptable to or licensed by 48 manufacturer of primary roofing materials. 49 The Roofing Contractor must be a member in good standing of the NRCA and familiar with the details, drawings 51 and practices of the most recent NRCA Roofing Manual. 52 All BUR work shall be performed in strict accordance with the requirements and procedures outlined in FM 54 Global’s guidelines on Safeguarding Torch-Applied Roof Installations and the primary roofing membrane 55 manufacturer's written installation procedures, whichever is the most stringent. These requirements include fire 56 watch and fire protection procedures to be undertaken to protect the existing structure and its contents. 57 The Roofing Contractor must maintain a full-time Project Superintendents on the jobsite during times that roofing 59

102-029 07 52 00-2 work is in progress. Supervisor must have a minimum of five years experience in built-up roofing application, and 1 must be a full-time employee of the Roofing Contractor. 2 The Roofing Contractor shall employ full-time supervisory personnel who have successfully completed the MRCA 4 CERTA program. These accredited personnel shall be directly involved with the day to day performance of the 5 work included in this Section 6 All work shall be done in accordance with the best trade practices using sufficient qualified workmen. There shall 8 be a minimum of six workmen on the roof from start of roofing to completion (three journeymen and three 9 laborers). This ratio of journeymen to laborers must be maintained if more than six workmen are on the roof at any 10 one time. 11 The Roofing Contractor shall not "sub-let" the installation of the built-up roofing covered under this Specification 13 (including roofing membrane and flashings) to an individual or firm which is not a full-time employee of the Roofing 14 Contractor. 15 Workers using torch equipment shall be trained, experienced personnel in the safe use of the equipment. Workers 17 shall be familiar with ARMA and MRCA torch welding guidelines. 18 Make all required notifications and secure all required inspections by the manufacturer of the approved materials 20 to facilitate issuance of the specified roof warranty. 21

PRE-ROOFING CONFERENCE 23

Approximately two weeks prior to the scheduled commencement of built-up roofing installation and associated 25 work, and pre-arranged with the Government Construction Representative, the General Contractor shall arrange a 26 pre-roofing conference at the project site with the installer of each component of associated work to review the 27 scope of work which would coincide with or follow the roofing work. This meeting will include installers of electrical 28 and mechanical work, if applicable. 29 Parties represented at the pre-application conference shall include, but not be limited to, General Contractor, 31 Government Construction Representative, Lightweight Cellular Insulating Concrete (LCIC) subcontractor, 32 manufacturer’s representative for primary (TPO) roofing system, and the Roofing Contractor’s project 33 superintendent. The discussions of the conference and decisions, agreements and/or disagreements shall be 34 recorded with a written copy of the meeting sent to each party attending. This conference shall review foreseeable 35 methods and procedures related to the roofing work, including but not necessarily limited to the following: 36

1. Tour representative areas of roof deck and inspect and discuss conditions of substrate, roof drains, curbs, 37 penetrations and other preparatory work performed by other trades. 38

2. Review structural loading limitations of roof deck. 39

3. Review roofing system requirements, drawings, specifications and other contractual documents. 40

4. Review required submittals, both completed and yet to be completed. 41

5. Review complete material list of all items proposed to be furnished and installed under this Section. 42

6. Review manufacturer’s recommended methods of installation for roofing membrane and flashings. 43

7. Review detail drawing showing proposed temporary water cutoff detail. 44

9. Review any addenda. 45

10. Review and finalize construction schedule related to roofing work and verify availability of materials, 46 installer's personnel, equipment and facilities needed to make progress and avoid delays. 47

11. Review forecasted weather conditions and procedures for coping with unfavorable conditions, including 48 temporary roofing procedures. 49

SUBMITTALS 51

Shop Drawings shall be submitted in accordance with Section 1B, Shop Drawings/Submittals. Shop Drawings 53 shall show in detail the anticipated method for the placement and application of the roofing system membrane and 54 associated materials, together with the proposed membrane tie-ins to existing roof systems. 55 Assist the Government in preparation and submittals of roof installation acceptance certification as may be 57 necessary in connection with fire and extended coverage insurance on roofing and associated work. 58

102-029 07 52 00-3

Submit manufacturer's technical product data, installation instructions and recommendations for each type of 1 roofing product required. Include data substantiating that materials comply with requirements. 2 Submit copies of MRCA CERTA accreditation certificates for personnel supervising the work. 4

NRCA AND SMACNA REQUIREMENTS 6

All details not covered within these specifications are covered within the latest editions of the NRCA Roofers 8 Manual and the SMACNA "Architectural Sheet Metal Manual". Whenever a particular detail is not covered within 9 these specifications, the Roofing Contractor shall follow the practices outlined and detailed within these manuals. 10

ASBESTOS 12

No product shall contain any asbestos or asbestos-related product. 14

INSURANCE AND CODE REQUIREMENTS 16

Manufacturer and installer shall coordinate to provide assemblies which comply with the following: 18 FM Global Class NC-60-A requirements 19 Underwriters Laboratories requirements for “Class A” non-combustible roof 20

JOB CONDITIONS 22

Proceed with roofing work only when existing and forecasted weather conditions will permit work to be performed 24 in accordance with manufacturer's written recommendations and warranty requirements, including the following 25 cold weather requirements: 26

• Materials must remain in a storage area that is heated to a temperature of 60 degrees F to 80 degrees F 27 prior to installation. If the workability of the material deteriorates, the material shall be returned to the 28 heated storage area until the temperature of the material returns to the temperature of the heated storage 29 area. 30

• Should the primary membrane rolls become stiff or difficult to install, they must be replaced with new rolls 31 from the heated storage area. 32

Protect other work from spillage of adhesives, cements, and sealers and prevent all materials including aggregate 34 from entering or clogging drains or connecting piping. Replace or restore other work which has been soiled or 35 otherwise damaged by application of roofing system. 36 The Roofing Contractor shall have his crews clean up all debris around the outside of the building related to this 38 work at the end of each day. The Roofing Contractor is expected to "police" the area on an on-going basis for 39 debris which might fall off the roof. The Government reserves the right to hire a job-site clean up at the Roofing 40 Contractor's expense if a "single" warning is not headed. 41 The Roofing Contractor shall assume full responsibility for all dust, dirt, debris, and other roofing materials which 43 enter the building during the duration of the job. All such materials shall be removed and the area cleaned up on a 44 daily basis. To assist in preventing dust, dirt and debris from entering the building interior during reproofing 45 operations, the Contractor shall sweep or vacuum roof deck areas near new roof openings to be cut as a part of 46 this project. 47 The Roofing Contractor shall clean any walls which become stained with roofing debris or asphalt products before 49 the final walk-thru with the Government Construction Representative. 50

PRODUCT HANDLING 52

Products shall be delivered in original unopened containers as labeled by the manufacturer and stored and 54 protected in accordance with the manufacturer's requirements prior to and during installation. Materials which 55 have been damaged to the point that they will not perform as specified shall not be used. 56 Keep all primers, fuels, sealants and cleaning materials (e.g. gas, solvents, etc.) away from all ignition sources 58 (torches, flames, sparks, etc.). Consult container labels and material safety data sheets for specific safety 59

102-029 07 52 00-4 instructions. 1 Under no circumstance shall the primary membrane rolls be left flat or used as counter-weights for roof hoists. Any 3 instance of this happening will result in the Roofing Contractor replacing these rolls. 4 Deliver materials to the job site no sooner than 14 days prior to start of job. Materials shall be stored off of the roof 6 deck or ground, and covered completely with weatherproof canvas tarpaulins that are securely anchored so as to 7 resist wind blow-off. When storing materials on the roof, do not over-stress deck. Control temperature of storage 8 areas in accordance with manufacturer’s instructions. Protect materials from exposure to the elements. Store all 9 roll goods on end. 10 Use all necessary means to protect the materials in this section before, during, and after installation and to protect 12 the work and materials of all other trades. 13 In the event of material damage, immediately make all repairs and replacements to the approval of the 15 Government Construction Representative and at no additional cost to the Government. 16

SCHEDULING 18

Work is to be performed on a daily basis with each section completed before progressing to the next day’s work 20 unless specifically directed otherwise by the Owner’s Representative. Completion of work will be defined as the 21 installation of all specified roof preparation, field membrane and flashings. 22

ROOFING INSTALLER’S WARRANTY 24

Submit two copies of a written roofing material and workmanship warranty signed by the suppliers of the roofing 26 membrane, in which they agree to repair or replace defective materials and associated work which leaks water, 27 deteriorates, or otherwise fails to perform during the stated warranty period. Repairs and replacements required 28 because of events beyond the Roofing Contractor's control and which exceed performance requirements shall be 29 the responsibility of the Government. Such warranty shall cover all roofing materials and related labor specified 30 under this Section, including membrane, wall flashings, sealers, adhesives, and other related accessories, and 31 shall include repairs required due to wind gusts of 72 mph or less. 32 This warranty shall not charge the Government a "Proration" of materials or service during the entire warranty 34 period, but shall repair or replace the roofing system at "actual" costs with no dollar limit. 35 Warranty period shall be two (2) years after the Substantial Completion Date. 37

ROOFING MATERIALS WARRANTY 39

Submit two copies of a written roofing system material and workmanship warranty signed by both the General 41 Contractor and the Roofing Contractor, in which they agree to repair or replace defective materials and associated 42 work which leaks water, deteriorates, or otherwise fails to perform during the stated warranty period. Repairs and 43 replacements required because of events beyond the Roofing Contractor’s control and which exceed performance 44 requirements shall be the responsibility of the Government. Such warranty shall cover all roofing materials and 45 related labor specified under this Section, including membrane, wall flashings, and other related accessories, and 46 shall include repairs required due to wind gusts of 72 mph or less. 47 This warranty shall not charge the Government a “Proration” of materials or service during the entire warranty 49 period, but shall repair or replace the roofing system at “actual” costs with no dollar limit. 50 Warranty period shall be twenty (20) years after the Substantial Completion Date. 52

B. PRODUCTS 54

ROOFING SYSTEM 56

Roofing system shall be the following system (or approved equal), providing the system meets the insurance and 58 code requirements listed earlier in this section: 59

102-029 07 52 00-5

- One (1) layer of Firestone SBS Glass Torch Base fiberglass felt sheet meeting ASTM D2178 1 Type IV over existing concrete roof deck 2

Equal systems by Johns-Manville, Tamko Roofing Products, Siplast or GAF Materials Corp. are also approved, as 4 long as they meet the requirements of this Specification, including the warranty requirements. 5 Flashing at roof edges, curbs, vertical terminations and similar locations shall be Firestone SBS Premium Base or 7 equal product by one of the manufacturers listed above. 8

WASTE MATERIAL RECYCLING/REUSE 10

The following waste materials generated during this project shall be sent to a recycle/reuse facility in lieu of a 12 landfill or other waste facility: 13

- Roofing membrane and flashing 14 Several possible recycle/reuse companies: 16

- Nationwide Foam, Inc. (888-820-2760, www.nationwidefoam.com) 17

- American Recycling Center (989-725-5100, www.americanrecycling.com) 18

- Midwest Elastomerics (419-738-8844) 19

BUR EDGE/PENETRATION MATERIALS 21

Asphalt roof cement shall comply with ASTM D-4586 and shall be asphalt roof cement (asbestos free) or roofing 23 membrane manufacturer-supplied SBS modified asphalt roof cement (asbestos free) as required. 24 Reinforcing fabric shall comply with ASTM D 1668-1. 26 Asphalt primer shall comply with ASTM D-41 or SS-A-701, and shall not be thinned. 28

OTHER MATERIALS 30

All other materials not specifically described but required for a complete and proper installation of the work in this 32 section shall be as selected by the Roofing Contractor, approved by the manufacturer, and subject to the approval 33 of the Government Construction Representative. 34

C. EXECUTION 36

PREPARATION AND SURFACE CONDITIONS 38

Before roofing system application is started, remove trash, debris, grease, oil, water, moisture, and contaminants 40 that may affect bond of membrane to substrate. 41 Protect adjacent areas from damage with tarps or other durable materials. 43 Surfaces scheduled to receive roofing shall be free of any standing water, dew, frost, snow, or loose debris. 45 Substrate shall be smooth, free of sharp projections, and free of obvious depressions. 47 All nailers shall be securely installed prior to roofing. 49 Perform all related work specified elsewhere necessary for the installation of the specified membrane system. 51

FIRE WATCH 53

Roofing Contractor shall establish a fire watch procedure during and after torch use. Fire watch shall be 55 maintained for a minimum of one (1) hour after the last torch is extinguished. See Article 10 of the Supplementary 56 Conditions of the Contract for additional Fire Watch and monitoring requirements. Spec writer: the above 57 sentence may be specific to NFM projects only. 58

102-029 07 52 00-6

INSPECTION OF SUBSTRATE 1

Examine substrate surfaces to receive roofing system and associated work and conditions under which roofing will 3 be installed. Do not proceed with roofing until unsatisfactory conditions have been corrected in a manner 4 acceptable to installer. 5

GENERAL INSTALLATION REQUIREMENTS 7

Cooperate with inspection and test agencies engaged on this project as required for them to perform services in 9 connection with roofing system installation. 10 Protect other work from spillage of roofing materials, and prevent liquid materials from entering or clogging drains 12 and conductors. Replace/restore other work damaged by installation of BUR System work. 13 Provide cut-offs at the end of each day's work with edges sealed with roofing cement. Remove cut-offs 15 immediately before resuming work. 16 Do not allow asphalt to penetrate substrate joints and enter building or damage other construction. Do not permit 18 asphalt to run down between curbings or wood blockings. 19 Comply with manufacturer's printed instruction and recommendations for handling and installing roofing materials 21 for the entire installation process. 22

ROOF MEMBRANE INSTALLATION 24

Starting at low point or drain, torch apply membrane maintaining minimum 3” side laps and 6” end laps. Offset end 26 laps 3’ minimum, and stagger laps between layers. Torch apply the sheet by passing the flame of the torch evenly 27 across the face of the roll. Heat the sheet with the torch until it develops a sheen or glossy appearance. Apply 28 heat to the seam area of the previously-installed sheet as well just before applying the roll. The welding 29 temperature is usually correct when a flow of asphalt approximately 1/2" wide is seen coming from the 3" side lap. 30 If the asphalt starts to flow excessively during torching (more than 2"), the torching is proceeding too slowly. 31 Roll all sheets in a straight line so that no kinks or fish mouths result and sheets are laid completely flat. 33 Cut all "fishmouths" created and patch with a piece of roofing felt at the end of each day. 35 Extend BUR membrane to the top of all curbs and 4" above the top of the cant at vertical walls. 37 Provide a folded-back envelope at edges and penetrations of BUR membrane to provide positive protection 39 against flow of rainwater into building or off the edge. Seal corners and other interruptions of envelope with large 40 beads of roofing cement to provide positive protection against flow of rainwater. 41

ACCESSORIES 43

Where small roof accessories are set on built-up roofing membrane, set metal flanges in a bed of roofing cement, 45 and seal penetration of membrane with a bead of roofing cement. 46

ROOF DRAINS 48

Install layer of membrane into drain under clamping ring. 50 Install 27” x 27” lead set in asphalt roof cement under clamping ring. Prime lead flashing and allow primer to dry. 52 Install strip-in ply of membrane in hot asphalt extending 6” past outer edge of lead flashing and under clamping 54 ring. 55

METAL DETAILS - MISCELLANEOUS 57

Miscellaneous sheet metal accessory items, which are coordinated with the BUR installation, if any, are specified 59

102-029 07 52 00-7 in other sections of these specifications. 1 Install new 4 pound lead over all soil stacks with the top portion turned down and inside the soil stack pipe. Prime 3 the lead flange with asphalt primer and permit to dry. Apply membrane over the flange and up the pipe. 4

TEMPORARY WATER CUTOFFS 6

Temporary water cutoffs are to be constructed at the end of each working day to protect the roofing, building, and 8 building interior from damage due to wind, snow, and rain. Temporary water cutoffs are to be constructed with 9 roofing cement unless otherwise specifically approved by the Government Construction Representative. 10 Temporary water cutoffs shall be detailed by the Roofing Contractor and approved by the manufacturer and the 12 Government Construction Representative. 13 All temporary water cutoffs shall be removed at the commencement of work the next working day. 15

VERIFICATION 17

Inspect all membrane and flashing seams prior to notification of completion. All loose or separated seams shall be 19 repaired prior to acceptance of the project. 20

SAMPLING AND TESTING 22

The Government Construction Representative may require test cuts at any time during the construction process to 24 determine if the Roofing Contractor has complied with all aspects of the specifications. 25 When directed by the Government Construction Representative, proceed with additional or remedial work as 27 required to compensate for deficiencies. 28

PROTECTION OF ROOFING 30

Upon completion of roofing work, including associated work, Roofing Contractor shall advise the General 32 Contractor of recommended procedures for surveillance and protection of roofing during remainder of construction 33 period. At end of construction period, or at a time when remaining construction work will in no way affect or 34 endanger roofing (at Roofing Contractor's option), installer shall make a final inspection of roofing and prepare a 35 written report to be given to the General Contractor, with copies to the Government Construction Representative, 36 describing nature and extent of deterioration of any damage found in the work. 37 Roofing Contractor shall repair or replace, as required, deteriorated or defective work found at the time of final 39 inspection. Installer shall be engaged by the Roofing Contractor to repair damage to roofing which occurred 40 subsequent to roofing installation but prior to final inspection. Repair or replace roofing and associated work to a 41 condition free of damage and deterioration at the time of Substantial Completion. 42

102-029 07 53 23-1

SECTION 07 53 23 1

FLEXIBLE SHEET ROOFING SYSTEM 2

A. GENERAL 4

SCOPE 6

Extent of flexible sheet roofing system work as indicated on the Drawings includes patching of certain areas at 8 Roof Area ‘J’ as shown on the Drawings. 9

ACCEPTABLE MANUFACTURER 11

Firestone Building Products (no substitutions); in order to not void the warranty on the existing flexible sheet 13 roofing system. 14

QUALITY ASSURANCE 16

Provide materials bearing Underwriters Laboratories (U.L.) classification marking on bundles, packages, or 18 containers indicating that materials have been produced under U.L.’s classification and follow-up service. 19 Obtain primary roofing membrane from a single manufacturer. Obtain secondary materials as recommended by 21 the manufacturer of primary materials. 22 Applicators shall be factory trained and qualified personnel, licensed by the roofing manufacturer. Applicators 24 shall be craftsmen trained, knowledgeable and experienced in the actual application of this specified roofing 25 system. 26 Roofing Contractor shall be a firm with a minimum of five years experience in the application of the type of roofing 28 system shown and specified. 29 The roofing installer shall maintain a full-time Project Superintendent on the jobsite during times that roofing work 31 and associated work (as described above) is in progress. Supervisor must have a minimum of five years 32 experience in roofing work similar to the nature and scope of the specified roofing. 33 Roof insulation, EPDM membrane materials, and methods of installation shall be coordinated to develop 35 assemblies approved by the roof insulation and EPDM membrane roofing material manufacturers. In case of 36 conflict between these specifications for the above referenced materials and the latest manufacturer’s printed 37 recommendations, the latter shall govern, but the difference shall be brought to the attention of the Government 38 Construction Representative before installation. 39 The work of this section involves tie-in of a new Firestone EPDM roofing system into an existing Firestone EPDM 41 roofing system that is still under warranty (20 year Firestone warranty put in place January 2005). All tie-in work 42 shall be accomplished in a manner to not void the existing in-place warranty. 43

PRE-ROOFING CONFERENCE 45

Prior to the installation of roofing and associated work as listed above and after approval of required Shop 47 Drawings as specified below, the Roofing Contractor shall arrange a Pre-Roofing Conference at the project site at 48 a pre-arranged time approved by the Government Construction Representative. The conference shall include in 49 attendance the General Contractor, the Roofing Contractor’s jobsite foreman, installers of related work, and the 50 Government Construction Representative. 51

SUBMITTALS 53

Shop Drawings shall be submitted in accordance with Section 1B, Shop Drawings/Submittals. Shop Drawings 55 shall show in detail the anticipated method for the placement and application of the roofing system membrane, 56

102-029 07 53 23-2 flashing and associated materials. 1

PROJECT DELIVERY, STORAGE AND HANDLING 3

Materials shall be delivered in their original, unopened containers or protective coverings clearly labeled with 5 manufacturer's name, name brand, and appropriate identification numbers. All flammable materials shall be 6 stored in a cool, dry area away from sparks and open flames. Follow precautions outlined on containers or 7 supplied by material manufacturer/supplier. Adhesives shall be stored between 60 - 80 deg. F. Materials 8 damaged in handling or storage shall not be used and shall immediately be removed from the site. 9 Store all materials to prevent them from becoming wet, soiled, or covered with ice or snow before, during, or after 11 delivery to site. Store material in a completely enclosed building or trailer, if possible. If necessary to store 12 outdoors, stack materials on platforms or pallets at least 4 inches above ground and cover with waterproof 13 canvas. 14 All new and temporary construction, including equipment and accessories shall be secured in such a manner as 16 to preclude wind blow-off and subsequent roof or equipment damage. 17

NRCA AND SMACNA REQUIREMENTS 19

All details not covered within these specifications are covered within the latest editions of the NRCA Roofers 21 Manual and the SMACNA "Architectural Sheet Metal Manual". Whenever a particular detail is not covered within 22 these specifications, the Roofing Contractor shall follow the practices outlined and detailed within these manuals. 23

INSURANCE AND CODE REQUIREMENTS 25

Manufacturer and installer shall coordinate to provide assemblies which comply with the following: 27 FM Global Class NC-60-A-SH requirements 28 Underwriters Laboratories requirements for “Class A” non-combustible roof 29

JOB CONDITIONS 31

Proceed with application of roofing system and associated work only when existing and forecast weather 33 conditions and temperature meet the recommendations of the roofing system manufacturer. 34 Protect other work from spillage of adhesives, cements, and sealers and prevent any materials from entering or 36 clogging drains or connecting piping. Replace or restore other work which has been soiled or otherwise damaged 37 by application of roofing system. 38 Install roof insulation only if materials, equipment, and tradesmen required for the immediate installation of EPDM 40 membrane roofing over the roof insulation are at the project site. Do not install more roof insulation than can be 41 covered with roofing by the end of that working day. 42 Protect completed work where damage may be caused by other trades working on the roof. 44 Upon completion of installation, an inspection shall be conducted by a technical representative of the roofing 46 membrane manufacturer to ensure compliance with current specifications and details. 47

WARRANTY 49

Submit two copies of a written roofing material and workmanship warranty signed by the supplier of the 51 roofing membrane and roof insulation, in which they agree to repair or replace defective materials and 52 associated work which leaks water, deteriorates, or otherwise fails to perform during the stated warranty 53 period. Repairs and replacements required because of events beyond the Roofing Contractor's control and 54 which exceed performance requirements shall be the responsibility of the Government. Such warranty shall 55 cover all roofing materials and related labor specified under this Section, including membrane, wall flashings, 56

102-029 07 53 23-3 insulation, fasteners, sealers, adhesives, and other related accessories. 1 This warranty shall not charge the Government a "Proration" of materials or service during the entire warranty 3 period, but shall repair or replace the roofing system at "actual" costs with no dollar limit. 4 Warranty period shall be fifteen (15) years after the Substantial Completion Date. 6

B. PRODUCTS 8

MEMBRANE 10

Membrane roofing system shall be RubberGard EPDM Membrane Fully Adhered System with 45-mil reinforced 12 E.P.D.M. membrane, 60-mil E.P.D.M. flashings, and factory prefabricated or field fabricated pipe-seal flashings, 13 all as manufactured by Firestone Building Products. Splicing cement, splicing tape, lap sealant, and other 14 required accessories shall be totally compatible with the roofing system and supplied by the roofing system 15 manufacturer. Materials, accessories, application methods, standards, and details shall all be in accordance with 16 Specifications for RubberGard EPDM Membrane Fully Adhered System, latest edition, published by Firestone 17 Building Products. 18 Reinforced elastomeric EPDM membrane shall conform to the general requirements of ASTM D-4637, 0.045 20 inches in thickness that meets or exceeds the following physical properties: 21 Physical Property Test Method Minimum Test Result 23 Color Black 25 Breaking Strength ASTM D-751 180 lbf 26 Grab Method 27 Elongation at Break ASTM D-412 475 % 29 Die “C” 30 Tear Strength ASTM D-751 30 lbf 32 Tongue Tear 33 Brittleness Temperature ASTM D-2137 -50° C 35 Resistance to Ozone ASTM D-1149 No cracks 37 Elastomeric flashing can be furnished in 60 mil vulcanized or uncured condition, depending on membrane 39 manufacturer's recommendation. When cured, both types shall meet or exceed the following test values: 40 Property Test Method Test Value 42 Tensile Strength ASTM D-412 1300 psi 44 Elongation @ Break ASTM D-412 350% 45 Brittleness Temperature ASTM D-746 -40° C 46 Tear Resistance (Die "C") ASTM D-1149 140 lbf/in 47 Resistance to Ozone ASTM D-1149 No cracks 48

MISCELLANOUS MEMBRANE MATERIALS 50

Prefabricated vent pipe flashings shall be made from 60 mil thick (minimum) reinforced EPDM membrane by 52 the same manufacturer as the primary roofing membrane. 53 Adhesive for attaching membrane and flashing to the substrate shall be solvent-based reactivating type adhesive 55 as recommended by the roofing membrane manufacturer. 56

102-029 07 53 23-4

Termination bars shall be extruded aluminum, low-profile bars 1 inch wide by 1/8 inch thick with predrilled holes 1 every 6 inches on center. 2 Cements and Primers used for splicing, patching, and flashing shall be compatible to the polymers furnished, 4 furnished by the same manufacturer as the membrane elastomer, and shall meet the manufacturer's published 5 specifications for same. 6

ROOF INSULATION AND RELATED MATERIALS 8

Rigid non-tapered board insulation shall be 4” thick (field verify to match existing) closed-cell polyisocyanurate 4’-10 0” X 8’-0” boards with manufacturer’s standard facings on both surfaces and with a minimum aged R-value of 11

5.56 per inch at 75 deg. F and a minimum compressive strength of 15 psi, and shall be one of the following (or 12 approved equal): 13 H Shield 2.0 Hunter Panels 14 AC Foam II Atlas Roofing Corp. 15 Multi-Max Rmax, Inc. 16 Hy-Therm AP Dow Chemical 17 E’NRG’Y 3 Johns-Manville 18 ISO 95 Plus Firestone 19 Roofing membrane manufacturer-approved equal 20 Rigid tapered board insulation shall be closed-cell polyisocyanurate 4’-0” x 8’-0” factory-tapered boards of the 22 thickness as noted on the Drawings, with manufacturer’s standard facings on both surfaces and with a minimum 23 aged R-valve of 5.56 per inch at 75 deg. F and a minimum density meeting ASTM C578, and shall be of the same 24 type and manufacturer as listed above for non-tapered polyisocyanurate insulation, or approved equal (field-25 tapered insulation will not be accepted). 26 Rigid tapered insulation crickets shall be constructed of the same material as rigid tapered or non-tapered roof 28 insulation specified above. 29 At roof drains, provide minimum 2” thick roof insulation and tapered units as required. 31

MISCELLANEOUS MATERIALS 33

Adhesives for bonding insulation and membrane shall be the type recommended by the insulation manufacturer. 35 Adhesives for bonding insulation to the concrete roof deck shall be the type recommended by the insulation 37 manufacturer. 38

OTHER MATERIALS 40

All other materials not specifically described but required for a complete and proper installation of the work in this 42 section shall be as selected by the Roofing Contractor, approved by the manufacturer, and subject to the approval 43 of the Government Construction Representative. 44

C. EXECUTION 46

INSPECTION OF SUBSTRATE 48

Examine substrate surfaces to receive EPDM membrane roofing system and associated work. Do not proceed 50 with roofing until unsatisfactory conditions have been corrected and all surfaces are clean, smooth, dry and 51 completely free of all fins, loose or foreign materials, oil, grease or frost. 52 Deck shall be clean, dry and free from frost. 54

102-029 07 53 23-5

GENERAL INSTALLATION REQUIREMENTS 1

Prior to and during application, all dirt, debris and dust shall be removed from roofing membrane surfaces either 3 by vacuuming, sweeping, blowing with compressed air and/or similar methods. 4 Coordinate the installation of insulation, roofing membrane and flashings so that insulation is not exposed to 6 precipitation nor exposed overnight. 7 Install EPDM membrane roofing system in compliance with governing regulations and with the insurance 9 requirements as outlined earlier in this Section. 10

INSTALLATION OF ROOF INSULATION 12

Install roof insulation only if materials, equipment, and tradesmen required for the immediate installation of roofing 14 are at the project site. Do not install more roof insulation than can be covered with roofing by the end of that 15 working day. 16 Install first layer of insulation with end joints staggered and with all joints tightly butted. Install second layer of 18 insulation with end joints staggered and with all joints tightly butted. Off-set all joints a minimum of 6 inches from 19 the joints of the first layer. 20 Attach all roof insulation to substrate with adhesive per the roofing manufacturer’s instructions. 22 Install tapered insulation crickets on the up-slope side of all curbs, hoods, etc. using adhesive as recommended 24 by the insulation manufacturer. 25 Trim surface of insulation where necessary at roof drains so completed work is flush with ring of drain. Trimming 27 shall be gradual, without sharp edges, 1-inch per foot maximum slope. 28 Keep insulation dry and out of sunlit areas and, after laying, protect it from traffic, wheelbarrows, and surfacing 30 material storage; apply roofing material before the end of each day's work. 31

INSTALLATION OF FULLY ADHERED EPDM MEMBRANE ROOFING SYSTEM 33

Installation of roofing, flashing, and accessories shall be completed in accordance with the roofing materials 35 manufacturer's written instructions, using the maximum sheet sizes available from the manufacturer, to form a 36 continuous, unstretched membrane mechanically fastened to perimeter nailer blocking as recommended by the 37 manufacturer. Unroll membrane allowing it to relax approximately one-half hour before adhering the membrane. 38 Install according to manufacturer's recommended procedures, avoiding wrinkles. Splices shall be 3-inch 39 minimum overlap, bonded with manufacturer's splice cement. The edges of all splices shall be sealed with a 40 bead of lap sealant prior to the end of each working day. Materials, accessories, application methods, standards 41 and details shall all be in accordance with Specifications for RubberGard EPDM Membrane Fully Adhered 42 System, latest edition, published by Firestone Building Products. Deviations from this specification must be 43 obtained and approved in writing via addendum prior to the bid date. 44 Adhere EPDM membrane to the substrate as recommended by the EPDM roofing membrane manufacturer. 46 Install metal termination bars as recommended by the EPDM roofing membrane manufacturer. Leave small joint 48 between ends of abutting bars to allow for thermal expansion. 49

EPDM FLASHING 51

Adhere EPDM membrane flashing to walls and other locations shown on the Drawings as recommended by the 53 roofing membrane manufacturer. 54

102-029 07 53 23-6

CUTOFFS 1

Apply cutoffs as required and recommended by the roofing manufacturer to the end of the roofing at the end of 3 each working day in order to prevent the possibility of moisture and sunlight getting into or under the areas on 4 which roofing has been completed. Remove cutoffs when work is resumed. 5

SAMPLING AND TESTING 7

The Government Construction Representative may require test cuts at any time during the construction 9 process to determine if any insulation is wet and if the Roofing Contractor has complied with all aspects of 10 the specifications. 11 When directed by the Government Construction Representative, proceed with additional or remedial work as 13 required to compensate for deficiencies. 14

PROTECTION OF ROOFING 16

At end of construction period, or at a time when remaining construction work will in no way affect or endanger 18 roofing (at Roofing Contractor's option), Roofing Contractor shall make a final inspection of roofing and 19 prepare a written report to be given to the Government Construction Representative describing nature and 20 extent of deterioration of any damage found in the work. 21 Roofing Contractor shall repair or replace, as required, deteriorated or defective work found at the time of 23 final inspection. The Roofing Contractor shall repair damage to roofing which occurred subsequent to roofing 24 installation but prior to final inspection. Repair or replace roofing and associated work to a condition free of 25 damage and deterioration at the time of Substantial Completion. 26

102-029 07 54 23-1

SECTION 07 54 23 1

MEMBRANE ROOFING SYSTEM 2

A. GENERAL 4

RELATED WORK SPECIFIED ELSEWHERE 6

Lightweight Cellular Insulating Concrete System Section 03 52 16.13 8 Wood Nailers and Blocking Section 06 10 00 9 Modified Bitumen Roofing System Section 07 52 00 10 Sheet Metal Flashing Section 07 60 00 11 Roof Accessories Section 07 72 00 12 Modular Green Roofing System Section 07 72 73 13

SCOPE 15

Extent of membrane roofing system work as indicated on the Drawings and by provisions of this Section is 17 defined to include roofing, roof insulation under roofing (at certain areas shown on the Drawings), membrane 18 flashing, and accessories integrally related to roofing installation. 19

REFERENCES 21

NRCA Roofing and Waterproofing Manual, latest edition – National Roofing Contractors Association. 23 Architectural Sheet Metal Manual, latest edition – Sheet Metal and Air Conditioning Contractors National 25 Association (SMACNA). 26 FM Global Roof Nav (www.roofnav.fmglobal.com) 28 FM Global Loss Prevention Data Sheets 1-28 and 1-29, latest edition. 30 Underwriters Laboratories, Inc. – Building Materials Directory, latest edition. 32

DESCRIPTION OF WORK 34

Furnish the administration, facilities, materials, labor, equipment, and quality control (QC) necessary to integrate 36 the work into the total building system so that leakage into the roofing system or building does not occur. The 37 roofing system is an assembly of components including the underlayment and insulation as applicable, roofing 38 membrane, TPO membrane and metal flashings, and all relocated parts necessary to complete the assembly. 39 The roofing system manufacturer is the TPO membrane manufacturer, who may or may not manufacture and 40 market the other components of the roofing system. 41

DESCRIPTION OF SYSTEM 43

Membrane roofing system shall be a fully-adhered TPO membrane roofing system, and shall be one of the 45 following (or approved equal), providing that the materials meet the requirements under the paragraphs titled 46 “TPO Membrane” and “Sustainability Requirements” below: 47 Firestone Building Products Company; Ultra Ply TPO System (60 mil) 49 Stevens Roofing Systems; Stevens EP Roofing Membrane System (60 mil) 50 Carlisle SynTec, Inc.; Sure-Weld Reinforced TPO System (60 mil) 51 GAF Materials Corporation; EverGuard TPO T-FA-N-I-60 (60 mil) 52 Dow Roofing Systems; Stevens EP TPO Membrane (60 mil) 53

102-029 07 54 23-2

QUALITY ASSURANCE 1

Provide materials bearing Underwriters Laboratories (U.L.) classification marking on bundles, packages, or 3 containers indicating that materials have been produced under U.L’s classification and follow-up service. 4 Provide roofing system and roof covering materials that have been evaluated by FM Global for fire spread, wind 6 uplift and hail damage, and bearing FM Global Class 1 approval markings. 7 Field membrane, insulation, fasteners and/or adhesives shall be selected from the specified products (in 9 combination) to provide a roof system that is defined by an active FM Global Roof Nav assembly number. 10 Fastener replacement and corner/perimeter areas shall be as defined in FM Global Loss Prevention Data Sheets 12 1-28 and 1-29 and the FM Global Approval Guide. 13 At a minimum, wood nailer installation shall meet FM Global Loss Prevention Data Sheet 1-49. 15 Obtain primary roofing membrane from a single manufacturer. Obtain secondary materials as recommended by 17 the manufacturer of primary materials. 18 Applicators shall be factory trained and qualified personnel, licensed by the roofing manufacturer. Applicators 20 shall be craftsmen trained, knowledgeable and experienced in the actual application of this specified roofing 21 system. 22 Roofing subcontractor shall be a firm with a minimum of five years experience in the application of the type of 24 roofing system shown and specified. All TPO membrane roofing and associated work shall be subcontracted to a 25 single firm which shall have undivided responsibility for the specified performance of component parts as follows 26 (even though some components may be subcontracted to others): 27 Roof insulation 28 Tapered edge strips 29 Flashing and sheet metal (used in connection with roof) 30 TPO membrane roofing 31 The roofing installer shall maintain a full-time supervisor/foreman on the jobsite during times that roofing work and 33 associated work (as described above) is in progress. Supervisor must have a minimum of five years experience 34 in roofing work similar to the nature and scope of the specified roofing. 35 Roof insulation, TPO membrane materials, and methods of installation shall be coordinated to develop 37 assemblies approved by the roof insulation and TPO membrane roofing material manufacturers. In case of 38 conflict between these specifications for the above referenced materials and the latest manufacturer's printed 39 recommendations, the latter shall govern, but the difference shall be brought to the attention of the Government 40 Construction Representative before installation. 41

PRE-ROOFING CONFERENCE 43

Prior to the installation of roofing and associated work as listed above and after approval of required Shop 45 Drawings as specified below, the General Contractor shall arrange a Pre-Roofing Conference at the project site at 46 a pre-arranged time approved by the Government Construction Representative. The conference shall include in 47 attendance the TPO roofing subcontractor and his jobsite foreman, installers of related work (including installers of 48 roof insulation, lightweight cellular insulating concrete system, and flashing and sheet metal) and representatives 49 for the roofing manufacturer and the Government Construction Representative. The General Contractor shall 50 record any discussions or agreements that are made which are not specifically addressed in the Contract 51 Documents and shall furnish a copy to all involved participants. 52 The discussions of the conference and decisions, agreements and/or disagreements shall be recorded with a 54 written copy of the meeting sent to each party attending. This conference shall review foreseeable methods 55 and procedures related to the roofing work, including but not necessarily limited to the following: 56

102-029 07 54 23-3

1. Tour representative areas of roof deck and inspect and discuss conditions of substrate, roof drains, 1 curbs, penetrations and other preparatory work performed by other trades. 2

2. Review structural loading limitations of all roof deck areas and inspect steel roof deck for loss of 3 flatness and for required mechanical fastening. 4

3. Review roofing system requirements, drawings, specifications and other contractual documents. 5

4. Review required submittals, both completed and yet to be completed. 6

5. Review complete material list of all items proposed to be furnished and installed under this Section. 7

6. Review manufacturer’s recommended methods of installation for insulation, roofing membrane and 8 flashings. 9

7. Review insulation fastening patterns for field, perimeter and corner areas, and review roof plan 10 clearly showing the perimeter and corner areas to receive increased fastener frequency. 11

8. Review detail drawing showing proposed temporary water cutoff detail. 12

9. Review any addenda. 13

10. Review and finalize construction schedule related to roofing work and verify availability of materials, 14 installer's personnel, equipment and facilities needed to make progress and avoid delays. 15

11. Review forecasted weather conditions and procedures for coping with unfavorable conditions, 16 including temporary roofing procedures. 17

SUBMITTALS 19

Shop Drawings shall be submitted in accordance with Section 1B, Shop Drawings/Submittals. Shop Drawings 21 shall show in detail the anticipated method for the placement and application of the roofing system membrane and 22 associated materials, including roof insulation, and sheet metal and flashing at all roof edges and other flashing 23 areas, and membrane sheet sizes, together with the proposed membrane tie-in to existing roof systems. These 24 Shop Drawings shall be combined with the sheet metal Shop Drawings to show relationships between the sheet 25 metal and the roofing materials. 26 Shop Drawings shall include a drawing showing mechanical fastener pattern for insulation attachment. 28 Before the start of work on-site, submit certifications from the insulation and fastener manufacturers/suppliers that 30 the materials to be used conform to specified standards as applicable to produce the TPO roofing membrane 31 manufacturer’s system to meet the requirements in the paragraph titled “Warranty”. 32 Before the start of work on-site, submit four copies of: 34

(1) Latest edition of TPO roofing membrane manufacturer’s published general requirements, technical 35 literature, repair instructions, and material safety data sheets for each system to be used in this Contract. 36

(2) Latest editions of all other materials manufacturer’s product and installation literature. 37 Submittal #1 As-Built Roof Summary is included at the end of this specification section. The Roofing Contractor 39 shall submit this summary upon completion of the project. 40

PRODUCT DELIVERY, STORAGE, AND HANDLING 42

Materials shall be delivered in their original, unopened containers or with protective coverings clearly labeled with 44 manufacturer's name, name brand, and appropriate identification numbers. All flammable materials shall be 45 stored in a cool, dry area away from sparks and open flames. Follow precautions outlined on containers or 46 supplied by material manufacturer/supplier. Adhesives shall be stored between 40 deg. F and 80 deg. F. 47 Materials damaged in handling or storage shall not be used and shall immediately be removed from the site. 48 Store all materials to prevent them from becoming wet, soiled, or covered with ice or snow before, during, or after 50 delivery to site. Store material in a completely enclosed building or trailer, if possible. If necessary to store 51 outdoors, stack materials on platforms or pallets at least 4 inches above ground and cover with waterproof 52 canvas. Allow air circulation under canvas so condensation does not occur; do not extend canvas to ground.