Specifications For: Roof Replacement City of Rockdale City Hall Rockdale, Texas

Transcription

1 Specifications For: Roof Replacement City of Rockdale City Hall Rockdale, Texas

2 PART 1 - GENERAL INFORMATION SECTION SUMMARY OF WORK 1.1 PROJECT IDENTIFICATION: Roof Replacement for the City of Rockdale - City Hall. The bid due date for the project is March 2, 2016 at 4:00 p.m. central standard time. A pre-bid meeting is to be held on February 17, 2016 at 10:00 a.m. Bids are to be either hand delivered or sent to the City of Rockdale, Attn. City Manager P.O Box 586 Rockdale, Texas. Current project timeline is to start in April and be finished in 30 days. 1.2 PROJECT SUMMARIES: A. The scope of work begins with removing the existing EPDM and built-up roofing assembly down to the metal deck. Work includes the complete removal of the roof flashings, the existing perimeter metal, counter flashings and miscellaneous materials to leave a clean substrate for reroofing. The contractor shall not remove more roofing than can be replaced on a daily basis or that can be made watertight by each days end. B. A new tapered polyisocyanurate insulation assembly is to be mechanically fastened to the metal decking. A tapered insulation plan is to be submitted to the owner and roofing membrane manufactures field rep. A new ½ securock or ½ Densdeck prime cover-board is to be installed over the new tapered insulation. C. The base bid roofing assembly will consist of one-ply of SBS base sheet and one ply surface SBS modified cap sheet in hot asphalt. During the installation of the cap sheet, roofing granules are to be installed in the hot asphalt bleed out. A new energy star reflective membrane coating is to be applied to the membrane at the end of the project. D. All base flashings will consist of one ply of SBS modified membrane base sheet and one ply of modified membrane mineral surfaced membrane. All base flashings around roof clerestory shall be a minimum of 8 inches. Extend base flashing height as needed. All laps in the mineral base flashings shall be sealed with an additional 6 inches wide strip of specified membrane. The project includes replacing all miscellaneous vent flashings with new lead vents. The project includes installing new 22-gauge pre-painted metal edge assembly complete with external continuous cleats, cover plates at joints and interior face fasteners in accordance with ANSI-SPRI ES-1 requirements. Wood nailers are to be added around roof perimeter to meet new insulation height. At all exhaust/intake vents, a new pre-painted counter-flashing metal is to be installed. Counter flashing to extend 4 minimum over top of membrane base flashings. E. The shingle roof system and all related metal flashings on the upper roof clerestory are to be replaced. See Section for more information. F. The project also includes removal and replacement of the clearstory skylight window system by a certified glass installer. Scope of work is to remove existing wire-glass and aluminum framing. Furnish and install new 2 x4 1/4" FG-3000 aluminum framing with a bronze anodized finish and a new 1 insulated PPG Solarban 60 Low E #2 on bronze glass. Existing window seal will need to be raised a minimum of 8 inches off of roof surface. A new stud wall is to be constructed to support the window system. G. The project includes installing new walk-pads around the roof access hatch and HVAC unit. The project includes painting all metal on the roof such as Galvanized vents, roof hatch, and miscellaneous vent flashings with membrane manufacturer s rust inhibitive primer and paint system. Color to be white. The roof drain strainers shall be wire brush and primed with membrane manufactures primer and painted with construction metal paint, color red. Gas lines are to be wire brushed and painted yellow. The existing air handler unit is also to be primed and painted. Note: Contractor shall refer to specifications, plans, and details for additional information. SCOPE OF WORK

3 1.2 ALTERNATE BID ITEMS: The following pricing is to be submitted in contractors proposals in lieu of the base bid pricing A. Alternate #1 - Use a low-voc cold process asphalt in lieu of the hot asphalt B. Alternate #2 - Use two-plies of fiberglass felts in hot asphalt in lieu of SBS Base Sheet 1.3 UNIT PRICES: The following unit prices will be used to add to or deduct from the total contract amount. A. Unit Price #1 - The per square foot cost to replace existing damaged metal decking. B. Unit Price #2 - The cost per board foot to replace damaged wood nailers. NOTE: The Owner may use Alternate and or Unit cost in determining the successful bidder. 1.4 Particular Project Requirements: A. Construction and completion: The Contractor shall coordinate all specified work and sequencing with the Owner and Membrane Manufactures Representative. B. Codes: Comply with all applicable codes and regulations of authorities having jurisdiction. Submit copies of inspection reports, notices, and similar communications to the Architect. C. Dimensions: The Roofing Contractor shall verify all measurements and dimensions. Verify dimensions indicated on drawings with field dimensions before fabrication or ordering of materials. Do not scale drawings. D. Existing Conditions: Notify Owner of existing conditions differing from those indicated on the drawings. Do not remove or alter structural components without prior written approval. 1.5 Definitions for terms used in the specifications: A. Provide: Furnish and install, complete with all necessary accessories, ready for intended use. Pay for all related costs. B. Approved: Acceptance of item submitted for approval. Not a limitation or release for compliance with the Contract Documents or regulatory requirements. The specifications are based on physical performance, guarantee requirements, manufacturer inspections and therefor any and all manufactures are encouraged to participate. Any and all systems meeting the established criteria are encouraged to submit and participate as long as said systems meet the established criteria. C. Match Existing: Match existing as acceptable to the Owner and/or Architect. D. Intent: Drawings and specifications are intended to provide the basis for proper completion of the work suitable for the intended use of the Owner. Anything not expressly set forth but which is reasonable implied or necessary for proper performance of the project shall be included. SCOPE OF WORK

4 E. Writing style: Specifications are written in the imperative mode. Except where specifically intended otherwise, the subject of all imperative statements is the Contractor. For example, 'Provide tile' means 'Contractor shall provide tile. PART 2 - PRODUCTS - Not Applicable To This Section PART 3 - EXECUTION - Not Applicable To This Section END OF SECTION SCOPE OF WORK

5 SECTION ASPHALT SHINGLES PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes the following: 1. Asphalt shingles. 2. Manufacturer s recommended underlayment. 3. Self-adhering sheet underlayment. 4. Ridge vents. 1.3 DEFINITIONS A. Roofing Terminology: Refer to ASTM D 1079 and glossary of NRCA's "The NRCA Roofing and Waterproofing Manual" for definitions of terms related to roofing work in this Section. 1.4 SUBMITTALS A. Product Data: For each type of product indicated. B. Samples for Initial Selection: For each type of asphalt shingle, ridge and hip cap shingles ridge vent and exposed valley lining indicated. 1. Include similar Samples of trim and accessories involving color selection. C. Samples for Verification: For the following products, of sizes indicated, to verify color selected. 1. Asphalt Shingle: Full-size asphalt shingle strip. 2. Ridge and Hip Cap Shingles: Full-size ridge and hip cap asphalt shingle. 3. Ridge Vent: 12-inch- (300-mm-) long Sample. 4. Exposed Valley Lining: 12 inches (300 mm) square. 5. Self-Adhering Underlayment: 12 inches (300 mm) square. D. Qualification Data: For Installer, including certificate signed by asphalt shingle manufacturer stating that Installer is approved, authorized, or licensed to install roofing system indicated. Section Asphalt Shingles

6 E. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency or by manufacturer and witnessed by a qualified testing agency, for asphalt shingles. F. Maintenance Data: For asphalt shingles to include in maintenance manuals. G. Warranties: Special warranties specified in this Section. 1.5 QUALITY ASSURANCE A. Source Limitations: Obtain specified products as required from warranting manufacturer as outlined in the specifications. B. Fire-Test-Response Characteristics: Provide asphalt shingle and related roofing materials with the fire-test-response characteristics indicated, as determined by testing identical products per test method below by UL or another testing and inspecting agency acceptable to authorities having jurisdiction. Identify materials with appropriate markings of applicable testing and inspecting agency. 1. Exterior Fire-Test Exposure: Class A; ASTM E 108 or UL 790, for application and roof slopes indicated. C. Pre-installation Conference: Conduct conference at Project site to comply with requirements in Division 1 Section "Project Management and Coordination." D. MANUFACTURER S INSPECTIONS A. When the project is in progress, the base sheet system manufacturer will provide the following: 1. Keep the Owner informed as to the progress and quality of the work as observed. 2. Provide daily job site inspections during installation of the shingle roof system. Provide daily ed progress reports to the Owner outlining the day s roof renovation progress. 3. Report to the Owner in writing any failure or refusal of the Contractor to correct unacceptable practices called to the Contractor s attention. 4. Confirm after completion that manufacturer has observed no applications procedures in conflict with the specifications other than those that may have been previously reported and corrected. 1.6 DELIVERY, STORAGE, AND HANDLING A. Store roofing materials in a dry, well-ventilated, weathertight location according to asphalt shingle manufacturer's written instructions. Store underlayment rolls on end on pallets or other raised surfaces. Do not double-stack rolls. 1. Handle, store, and place roofing materials in a manner to avoid significant or permanent damage to roof deck or structural supporting members. B. Protect unused under-layment from weather, sunlight, and moisture when left overnight or when roofing work is not in progress. 1.7 PROJECT CONDITIONS Section Asphalt Shingles

7 A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit asphalt shingle roofing to be performed according to manufacturer's written instructions and warranty requirements. 1. Install self-adhering sheet under-layment within the range of ambient and substrate temperatures recommended by manufacturer. 1.8 WARRANTY A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace asphalt shingles that fail in materials or workmanship within specified warranty period. Materials failures include manufacturing defects and failure of asphalt shingles to self-seal after a reasonable time. 1. Material Warranty Period: 20 years from date of Substantial Completion, prorated, with first 5 years non-prorated. 2. Wind-Speed Warranty Period: Asphalt shingles will resist blow-off or damage caused by wind speeds up to 80 mph for 10 years from date of Substantial Completion. B. Special Project Warranty: Roofing Installer's warranty, on warranty form at end of this Section, signed by roofing Installer, covering Work of this Section, in which roofing Installer agrees to repair or replace components of asphalt shingle roofing that fail in materials or workmanship within the following warranty period: 1. Warranty Period: two years from date of Substantial Completion. 1.9 EXTRA MATERIALS A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. 1. Asphalt Shingles: 100 sq. ft of each type, in unbroken bundles. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection: 1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, products specified. 2.2 GLASS-FIBER-REINFORCED ASPHALT SHINGLES A. Laminated-Strip Asphalt Shingles: ASTM D 3462, laminated, multi-ply overlay construction, glass-fiber reinforced, mineral-granule surfaced, and self-sealing. Section Asphalt Shingles

8 1. Available Products: a. GAF Materials Corporation - Timber-line b. Certainteed c. Owens Corning d. Tamko Heritage 2. Butt Edge: Straight cut. 3. Strip Size: Manufacturer's standard. 4. Algae Resistance: Granules treated to resist algae discoloration. B. Hip and Ridge Shingles: Manufacturer's standard units to match asphalt shingles. 2.3 UNDERLAYMENT MATERIALS A. Self-Adhering Sheet Underlayment,: ASTM D 1970, minimum of 60-mil-thick sheet; glassfiber-mat-reinforced, SBS-modified asphalt; with release paper backing; cold applied. Provide primer for adjoining concrete or masonry surfaces to receive underlayment. 2.4 ACCESSORIES A. Asphalt Roofing Cement: ASTM D 4586, Type II, asbestos free. B. Roofing Nails: ASTM F 1667; aluminum, stainless-steel, copper, or hot-dip galvanized steel wire shingle nails, minimum inch- (3-mm-) diameter, barbed shank, sharp-pointed, with a minimum 3/8-inch- (9.5-mm-) diameter flat head and of sufficient length to penetrate 3/4 inch (19 mm) into solid wood decking or extend at least 1/8 inch (3 mm) through OSB or plywood sheathing. 1. Where nails are in contact with metal flashing, use nails made from same metal as flashing. C. Felt Underlayment Nails: Aluminum, stainless-steel with low profile capped heads or disc caps, 1-inch (25-mm) minimum diameter. 2.5 METAL FLASHING AND TRIM A. Sheet Metal Flashing and Trim: Comply with requirements in Division 7 Section "Sheet Metal Flashing and Trim." 1. Sheet Metal: Kynar 500 per Section B. Fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, metal, and other characteristics of item. 1. Step Flashings: Fabricate with a headlap of 2 inches (50 mm) and a minimum extension of 5 inches (125 mm) over the underlying asphalt shingle and up the vertical surface. 2. Cricket Flashings: Fabricate with concealed flange extending a minimum 24 inches (600 mm) beneath upslope asphalt shingles and 6 inches (150 mm) above the roof plane. Section Asphalt Shingles

9 3. Open Valley Flashings: Fabricate in lengths not exceeding [10 feet (3 m)] with 1-inch- (25-mm-) high inverted-v profile at center of valley and equal flange widths of 10 inches (250 mm). 4. Drip Edges: Fabricate in lengths not exceeding [10 feet (3 m)] with 2-inch (50-mm) roof deck flange and 1-1/2-inch (38-mm) fascia flange with 3/8-inch (9.6-mm) drip at lower edge. C. Vent Pipe Flashings: ASTM B 749, Type L51121, at least 1/16 inch (1.6 mm) thick. Provide lead sleeve sized to slip over and turn down into pipe, soldered to skirt at slope of roof and extending at least 4 inches (100 mm) from pipe onto roof. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of work. 1. Examine roof sheathing to verify that sheathing joints are supported by framing and blocking or metal clips and that installation is within flatness tolerances. 2. Verify that substrate is sound, dry, smooth, clean, sloped for drainage, and completely anchored; and that provision has been made for flashings and penetrations through asphalt shingles. B. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 UNDERLAYMENT INSTALLATION A. Self-Adhering Sheet Underlayment: Install self-adhering sheet underlayment, wrinkle free, on roof deck. Comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Install at locations indicated on Drawings, lapped in direction to shed water. Lap sides not less than 3-1/2 inches (89 mm). Lap ends not less than 6 inches (150 mm) staggered 24 inches (600 mm) between courses. Roll laps with roller. Cover underlayment within seven days. 1. Prime concrete and masonry surfaces to receive self-adhering sheet underlayment. 2. Eaves: Extend from edges of eaves 36 inches beyond interior face of exterior wall. 3. Rakes: Extend from edges of rake 36 inches beyond interior face of exterior wall. 4. Valleys: Extend from lowest to highest point 18 inches on each side. 5. Hips: Extend 18 inches on each side. 6. Ridges: Extend 36 inches on each side. 7. Sidewalls: Extend beyond sidewall 18 inches and return vertically against sidewall not less than 4 inches 8. Dormers, Chimneys, Skylights, and other Roof-Penetrating Elements: Extend beyond penetrating element 18 inches and return vertically against penetrating element not less than 4 inches. 9. Roof Slope Transitions: Extend 18 inches on each roof slope. Section Asphalt Shingles

10 B. Metal-Flashed Open Valley Underlayment: Install two layers of 36-inchwide felt underlayment centered in valley. Stagger end laps between layers at least 72 inches. Lap ends of each layer at least 12 inches in direction to shed water, and seal with asphalt roofing cement. Fasten each layer to roof deck with roofing nails. 1. Lap roof deck felt underlayment over first layer of valley felt underlayment at least 6 inches. 3.3 METAL FLASHING INSTALLATION A. General: Install metal flashings and other sheet metal to comply with requirements in Division 7 Section "Sheet Metal Flashing and Trim." 1. Install metal flashings according to recommendations in ARMA's "Residential Asphalt Roofing Manual" and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual." B. Apron Flashings: Extend lower flange over and beyond each side of downslope asphalt shingles and up the vertical surface. C. Step Flashings: Install with a headlap of 2 inches and extend over the underlying asphalt shingle and up the vertical surface. Fasten to roof deck only. D. Cricket Flashings: Install against the roof-penetrating element extending concealed flange beneath upslope asphalt shingles and beyond each side. E. Open Valley Flashings: Install centrally in valleys, lapping ends at least 8 inches in direction to shed water. Fasten upper end of each length to roof deck beneath overlap. 1. Secure hemmed flange edges into metal cleats spaced 2 inches apart and fastened to roof deck. F. Rake Drip Edges: Install rake drip edge flashings over underlayment and fasten to roof deck. G. Eave Drip Edges: Install eave drip edge flashings below underlayment and fasten to roof sheathing. H. Pipe Flashings: Form flashing around pipe penetrations and asphalt shingles. Fasten and seal to asphalt shingles as recommended by manufacturer. 3.4 ASPHALT SHINGLE INSTALLATION A. Install asphalt shingles according to manufacturer's written instructions, recommendations in ARMA's "Residential Asphalt Roofing Manual," and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual." B. Install starter strip along lowest roof edge, consisting of an asphalt shingle strip with tabs removed with self-sealing strip face up at roof edge. 1. Extend asphalt shingles 1/2 inch over fascia at eaves and rakes. Section Asphalt Shingles

11 2. Install starter strip along rake edge. C. Install first and remaining courses of asphalt shingles stair-stepping diagonally across roof deck with manufacturer's recommended offset pattern at succeeding courses, maintaining uniform exposure. D. Fasten asphalt shingle strips with a minimum of five roofing nails located according to manufacturer's written instructions. 1. When ambient temperature during installation is below 50 deg F, seal asphalt shingles with asphalt roofing cement spots. E. Closed-Cut Valleys: Extend asphalt shingle strips from one side of valley 12 inches beyond center of valley. Use one-piece shingle strips without joints in the valley. Fasten with extra nail in upper end of shingle. Install asphalt shingle courses from other side of valley and cut back to a straight line 2 inches short of valley centerline. Trim upper concealed corners of cut-back shingle strips. 1. Do not nail asphalt shingles within 6 inches of valley center. 2. Set trimmed, concealed-corner asphalt shingles in a 3-inch-wide bed of asphalt roofing cement. F. Ridge Vents: Install continuous ridge vents over asphalt shingles according to manufacturer's written instructions. Fasten with roofing nails of sufficient length to penetrate sheathing. G. Ridge and Hip Cap Shingles: Maintain same exposure of cap shingles as roofing shingle exposure. Lap cap shingles at ridges to shed water away from direction of prevailing winds. Fasten with roofing nails of sufficient length to penetrate sheathing. 1. Fasten ridge cap asphalt shingles to cover ridge vent without obstructing airflow. END OF SECTION Section Asphalt Shingles

12 SECTION MODIFIED BITUMINOUS MEMBRANE ROOFING PART 1 GENERAL 1.1 SECTION INCLUDES A. Hot Applied 2-Ply Asphalt Roofing (2.9) (3.5) B. Accessories. (2.16) C. Edge Treatment and Roof Penetration Flashings. (2.17)(3.9). 1.2 REFERENCES A. ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing. B. ASTM D Standard Specification for Asphalt used in Roofing. C. ASTM D 1079 Standard Terminology Relating to Roofing, Waterproofing and Bituminous Materials. D. ASTM D 1863 Standard Specification for Mineral Aggregate Used as a Protective Coating for Roofing. E. ASTM D 2178 Standard Specification for Asphalt Glass Felt Used in Roofing and Waterproofing. F. ASTM D 2824 Standard Specification for Aluminum-Pigmented Asphalt Roof Coating. G. ASTM D 4601 Standard Specification for Asphalt Coated Glass Fiber Base Sheet Used in Roofing. H. ASTM D 5147 Standard Test Method for Sampling and Testing Modified Bituminous Sheet Materials. I. ASTM D 6162 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements. J. ASTM D 6163 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Glass Fiber Reinforcements. 1.3 DESIGN / PERFORMANCE REQUIREMENTS A. Perform work in accordance with all federal, state and local codes. B. Exterior Fire Test Exposure: Roof system shall achieve a UL, FM or WH Class rating for roof slopes indicated on the Drawings as follows: 1. Factory Mutual Class A Rating. 2. Underwriters Laboratory Class A Rating. 3. Warnock Hersey Class A Rating. C. Design Requirements: 1. Uniform Wind Uplift Load Capacity

13 a. Installed roof system shall withstand negative (uplift) design wind loading pressures complying with the following criteria. 1) Design Code: ASCE 7-05, Method 2 for Components and Cladding. 2) Importance Category: a) III. 3) Importance Factor of: a) ) Wind Speed: 90 mph 5) Ultimate Pullout Value: 485 pounds per each of the fastener 6) Exposure Category: a) C. 7) Design Roof Height: 20 feet. 8) Minimum Building Width: 70 feet. 9) Roof Pitch:.25 :12. 10) Roof Area Design Uplift Pressure: a) Zone 1 - Field of roof 21.6 psf b) Zone 2 - Eaves, ridges, hips and rakes 36.2 psf c) Zone 3 - Corners 54.5 psf 2. Snow Load: 54.4 psf. 3. Live Load: 20 psf, or not to exceed original building design. 4. Dead Load: a. Installation of new roofing materials shall not exceed the dead load capacity of the existing roof structure. D. Energy Star: Roof System shall comply with the initial and aged reflectivity required by the U.S. Federal Government's Energy Star program. E. Roof System membranes containing recycled or bio-based materials shall be third party certified through UL Environment. F. Roof system shall have been tested in compliance with the following codes and test requirements: 1. FM Approvals: a. RoofNav Website 1.4 SUBMITTALS A. Submit under provisions of Section B. Product Data: Manufacturer's data sheets on each product to be used, including: 1. Preparation instructions and recommendations. 2. Storage and handling requirements and recommendations. 3. Installation instructions. C. Design Pressure Calculations: Submit design pressure calculations for the roof area in accordance with ASCE 7-05 and local Building Code requirements. Include a roof system attachment analysis report, certifying the system's compliance with applicable wind load requirements before Work begins. Report shall be signed and sealed by a Professional Engineer registered in the State of the Project who has provided roof system attachment analysis for not less than 5 consecutive years. D. Recycled or Bio-Based Materials: Provide third party certification through UL Environment of roof System membranes containing recycled or bio based materials E. Verification Samples: For each modified bituminous membrane ply product specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns

14 F. Manufacturer's Certificates: Provide to certify products meet or exceed specified requirements. G. Test Reports: Submit test reports, prepared by an independent testing agency, for all modified bituminous sheet roofing, indicating compliance with ASTM D5147. Testing must be performed at 77 deg. F. Tests at 0 deg. F will not be considered. H. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic inspection and maintenance of all completed roofing work. Provide product warranty executed by the manufacturer. Assist Owner in preparation and submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance on roofing and associated work. 1.5 QUALITY ASSURANCE A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual. B. Manufacturer Qualifications: Company specializing in manufacturing products specified with documented ISO 9001 certification and minimum of twelve years of documented experience and must not have been in Chapter 11 bankruptcy during the last five years. C. Installer Qualifications: Company specializing in performing Work of this section with minimum five years documented experience and a certified Pre-Approved Garland Contractor. D. Installer's Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work while roofing work is in progress. E. Product Certification: Provide manufacturer's certification that materials are manufactured in the United States and conform to requirements specified herein, are chemically and physically compatible with each other, and are suitable for inclusion within the total roof system specified herein. F. Source Limitations: Obtain all components of roof system from a single manufacturer. Secondary products that are required shall be recommended and approved in writing by the roofing system Manufacturer. Upon request of the Architect or Owner, submit Manufacturer's written approval of secondary components in list form, signed by an authorized agent of the Manufacturer. 1.6 PRE-INSTALLATION MEETINGS A. Convene minimum two weeks prior to commencing Work of this section. B. Review installation procedures and coordination required with related Work. C. Inspect and make notes of job conditions prior to installation: 1. Record minutes of the conference and provide copies to all parties present. 2. Identify all outstanding issues in writing designating the responsible party for follow-up action and the timetable for completion. 3. Installation of roofing system shall not begin until all outstanding issues are resolved to the satisfaction of the Architect. 1.7 DELIVERY, STORAGE, AND HANDLING A. Deliver and store products in manufacturer's unopened packaging with labels intact until ready for installation. B. Store all roofing materials in a dry place, on pallets or raised platforms, out of direct

15 exposure to the elements until time of application. Store materials at least 4 inches above ground level and covered with "breathable" tarpaulins. C. Stored in accordance with the instructions of the manufacturer prior to their application or installation. Store roll goods on end on a clean flat surface. No wet or damaged materials will be used in the application. D. Store at room temperature wherever possible, until immediately prior to installing the roll. During winter, store materials in a heated location with a 50 degree F (10 degree C) minimum temperature, removed only as needed for immediate use. Keep materials away from open flame or welding sparks. E. Avoid stockpiling of materials on roofs without first obtaining acceptance from the Architect/Engineer. F. Adhesive storage shall be between the range of above 40 degree F (4 degree C) and below 80 degree F (27 degree C). Area of storage shall be constructed for flammable storage. 1.8 COORDINATION A. Coordinate Work with installing associated metal flashings as work of this section proceeds. 1.9 PROJECT CONDITIONS A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits WARRANTY A. Upon completion of the work, provide the Manufacturer's written and signed NDL Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due either to defective material or defective workmanship by the installing contractor, the manufacturer shall provide the Owner, at the Manufacturer's expense, with the labor and material necessary to return the defective area to a watertight condition. 1. Warranty Period: a. 30 years from date of acceptance. Requires mid period inspection. B. Installer is to guarantee all work against defects in materials and workmanship for a period indicated following final acceptance of the Work. 1. Warranty Period: a. 2 years from date of acceptance. PART 2 PRODUCTS 2.1 MANUFACTURERS A. Requests for substitutions will be considered in accordance with provisions of Section HOT APPLIED 2-PLY ASPHALT ROOFING - STRESSPLY A. Base (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive: mil B. Modified Cap (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive mils

16 C. Interply Adhesive: (1 and 2) 1. Generic Type IV Asphalt: D. Flashing Base Ply: One ply bonded to the prepared substrate with Interply Adhesive: except torch sheet mil E. Flashing Cap (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive: except torch sheet mil F. Flashing Ply Adhesive: 1. Generic Type IV Asphalt: G. Surfacing: 1. Surface Coatings - Energy Star approved acrylic roof coating: 2.3 ACCESSORlES: A. Roof Insulation: In accordance with Section B. Roof Insulation: Provide G-P Gypsum DenDeck Prime, USG Securrock for proper adhesion of the self-adhered base sheet in accordance with Section EDGE TREATMENT AND ROOF PENETRATION FLASHINGS A. Flashing Boot - Rubbertite Flashing Boot: Neoprene pipe boot for sealing single or multiple pipe penetrations adhered in approved adhesives as recommended and furnished by the membrane manufacturer. B. Vents and Breathers: Heavy gauge aluminum and fully insulated vent that allows moisture and air to escape but not enter the roof system as recommended and furnished by the membrane manufacturer. C. Pitch pans, Rain Collar 24 gauge stainless or 20oz (567gram) copper. All joints should be welded/soldered watertight. See details for design. D. Drain Flashings should be 4lb (1.8kg) sheet lead formed and rolled. E. Plumbing stacks should be 4lb (1.8kg) sheet lead formed and rolled. F. Liquid Flashing - An asphaltic-polyurethane, low odor, liquid flashing material designed for specialized details unable to be waterproofed with typical modified membrane flashings. 1. Tensile Strength, ASTM D 412: 400 psi 2. Elongation, ASTM D 412: 300% 3. deg. F 8.5 lb/gal typical G. Fabricated Flashings: Fabricated flashings and trim are specified in Section Fabricated flashings and trim shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the CDA Copper Development Association "Copper in Architecture - Handbook" as applicable. H. Manufactured Roof Specialties: Manufactured copings, fascia, gravel stops, control joints, expansion joints, joint covers and related flashings and trim are specified in Section Manufactured roof specialties shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the NRCA "Roofing and Waterproofing Manual" as applicable

17 PART 3 EXECUTION 3.1 EXAMINATION A. Do not begin installation until substrates have been properly prepared. B. Inspect and approve the deck condition, slopes and fastener backing if applicable, parapet walls, expansion joints, roof drains, stack vents, vent outlets, nailers and surfaces and elements. C. Verify that work penetrating the roof deck, or which may otherwise affect the roofing, has been properly completed. D. If substrate preparation and other conditions are the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding. 3.2 PREPARATION A. General: Clean surfaces thoroughly prior to installation. 1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions. 2. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material. 3. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound. 4. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work. 5. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces. 6. Fasteners and plates for fastening components mechanically to the substrate shall provide a minimum pull-out capacity of 300 lbs. (136 k) per fastener. Base or ply sheets attached with cap nails require a minimum pullout capacity of 40 lb. per nail. 7. Prime decks where required, in accordance with requirements and recommendations of the primer and deck manufacturer. B. Metal Deck: Metal deck shall be installed as specified in Section 1. Fastening of the deck should comply with the anticipated live and dead loads pertaining to the building as well as applicable Code. 2. Steel decks shall be minimum 22-gauge factory galvanized or zinc alloy coated for protection against corrosion. 3. Suitable insulation shall be mechanically attached as recommended by the insulation manufacturer. 4. Decks shall comply with the gauge and span requirements in the current Factory Mutual FM Approval Guide and be installed in accordance with Loss Prevention Data Sheet 1-28 or specific FM approval. 5. When re-roofing over steel decks, surface corrosion shall be removed, and repairs to severely corroded areas made. Loose or inadequately secured decking shall be fastened, and irreparable or otherwise defective decking shall be replaced. 3.3 INSTALLATION - GENERAL A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers Association, and applicable codes. B. General: Avoid installation of modified bitumen membranes at temperatures lower than

18 45 degrees F. When work at such temperatures unavoidable use the following precautions: 1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as well. 2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area. C. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to constantly shed water D. All slopes greater than 2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral-shank 1 inch cap nails, or screws and plates at a rate of 1 fastener per ply (including the membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and 4 feet o.c. for slopes greater than 3:12. On non-insulated systems, nail each ply directly into the deck at the rate specified above. When slope exceeds 2:12, install all plies parallel to the slope (strapping) to facilitate backnailing. Install 4 additional fasteners at the upper edge of the membrane when strapping the plies. 3.4 INSTALLATION HOT APPLIED ROOF SYSTEM A. Base/Felt Ply(s): Install base sheet or felt plies in twenty five (25) lbs (11.3kg) per square of bitumen shingled uniformly to achieve one or more plies over the entire prepared substrate. Shingle in direction of slope of roof to shed water on each area of roof. Do not step on base rolls until asphalt has cooled, fish mouths should be cut and patched. 1. Lap ply sheet ends 8 inches (203 mm). Stagger end laps 2 inches (304mm) minimum. 2. Install base flashing ply to all perimeter and projection details after membrane application. 3. Extend plies 2 inches beyond top edges of cants at wall and projection bases. 4. Install base flashing ply to all perimeter and projection details. 5. Allow the one ply of base sheet to cure at least 30 minutes before installing the modified membrane. However, the modified membrane must be installed the same day as the base plies. B. Modified Cap Ply(s): Solidly bond the modified membrane to the base layers with specified material at the rate of 25 to thirty 30 lbs. (11-13kg) per 100 square feet. 1. Roll must push a puddle of hot material in front of it with material slightly visible at all side laps. Use care to eliminate air entrapment under the membrane. Exercise care during application to eliminate air entrapment under the membrane. 2. Apply pressure to all seams to ensure that the laps are solidly bonded to substrate. 3. Install subsequent rolls of modified membrane as above with a minimum of 4 inch (101 mm) side laps and 8 inch (203 mm) end laps. Stagger end laps. Apply membrane in the same direction as the previous layers but stagger the laps so they do not coincide with the laps of the base layers. 4. Apply hot material no more than 5 feet (1.5 m) ahead of each roll being embedded. 5. Extend membrane 2 inches (50 mm) beyond top edge of all cants in full moppings of the specified hot material. C. Fibrous Cant Strips: Provide non-combustible perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners

19 D. Wood Blocking, Nailers and Cant Strips: Provide wood blocking, nailers and cant strips as specified in Section Provide nailers at all roof perimeters and penetrations for fastening membrane flashings and sheet metal components. 2. Wood nailers should match the height of any insulation, providing a smooth and even transition between flashing and insulation areas. 3. Nailer lengths should be spaced with a minimum 1/8 inch gap for expansion and contraction between each length or change of direction. 4. Nailers and flashings should be fastened in accordance with Factory Mutual "Loss Prevention Data Sheet 1-49, Perimeter Flashing" and be designed to be capable of resisting a minimum force of 200 lbs/lineal foot in any direction. E. Metal Work: Provide metal flashings, counter flashings, parapet coping caps and thru-wall flashings as specified in Section or Section Install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual. F. Termination Bar: Provide a metal termination bar or approved top edge securement at the terminus of all flashing sheets at walls and curbs. Fasten the bar a minimum of 8 inches (203 mm) o/c to achieve constant compression. Provide suitable, sealant at the top edge if required. G. Flashing Base Ply: Install flashing sheets by the same application method used for the base ply. 1. Seal curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane. 2. Prepare all walls, penetrations, expansion joints and surfaces to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free. 3. Adhere to the underlying base flashing ply with specified hot material unless otherwise noted in these specifications. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces. 4. Solidly adhere the entire sheet of flashing membrane to the substrate. 5. Seal all vertical laps of flashing membrane with a three-course application of trowelgrade mastic and mesh. 6. Coordinate counter flashing, cap flashings, expansion joints, and similar work with modified bitumen roofing work as specified. 7. Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work. H. Flashing Cap Ply: Install flashing cap sheets by the same application method used for the base ply. 1. Seal curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane. 2. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free. 3. Adhere to the underlying base flashing ply with specified flashing ply adhesive unless otherwise specified. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces. 4. Coordinate counter flashing, cap flashings, expansion joints and similar work with modified bitumen roofing work as specified. 5. Coordinate roof accessories, miscellaneous sheet metal accessory items with the roofing system work. 6. All stripping shall be installed prior to flashing cap sheet installation. 7. Heat and scrape granules when welding or adhering at cut areas and seams to

20 granular surfaces at all flashings. 8. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed, or nailed 4 inches on center and covered with an acceptable counter flashing. I. Surface Coatings: Apply roof coatings in strict conformance with the manufacturer's recommended procedures. J. Roof Walkways: Provide walkways in areas indicated on the Drawings. 3.5 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHING A. Raised Metal Edge: 1. Inspect the nailer to assure proper attachment and configuration. 2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c. 3. Install continuous cleat and fasten at 6 inches (152 mm) o.c. 4. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered. 5. Prime metal edge at a rate of 100 square feet per gallon and allow to dry. 6. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches (152 mm) on to the field of roof. Assure ply laps do not coincide with metal laps. 7. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. B. Roof Edge With Gutter: 1. Inspect the nailer to assure proper attachment and configuration. Increase slope at metal edge by additional degree of slope in first board. 2. Run one ply over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c. 3. Install gutter and strapping. 4. Install continuous cleat and fasten at 6 inches (152 mm) o.c. 5. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered. 6. Prime metal edge at a rate of 100 square feet per gallon and allow to dry. 7. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches (152 mm) onto the field of the roof. Assure ply laps do not coincide with metal laps. 8. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. C. Surface Mounted Counterflashing: 1. Minimum flashing height is 8 inches (203 mm) above finished roof height. Maximum flashing height is 24 inches (609 mm). Prime vertical wall at a rate of 100 square feet per gallon and allow to dry. 2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm). 3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to field of the roof. 4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize. 5. Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape and into wall. Alternatively use caulk to replace the butyl tape. 6. Secure counterflashing set on butyl tape above flashing at 8 inches (203 mm) o.c. and caulk top of counterflashing. D. Curb Detail/Air Handling Station: 1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical

21 at a rate of 100 square feet per gallon and allow to dry. 2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm). 3. Install base flashing ply covering curb set in bitumen with 6 inches (152 mm) on to field of the roof. 4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize. 5. Install pre-manufactured counterflashing with fasteners and neoprene washers or per manufacturer's recommendations. 6. Set equipment on neoprene pad and fasten as required by equipment manufacturer. E. Pre-manufactured Curb For Equipment Support: 1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical at a rate of 100 square feet per gallon and allow to dry. 2. Run all field plies over cant of the pre-manufactured equipment support a minimum of 2 inches. 3. Install base flashing ply covering pre-manufactured curb with 6 inches (152 mm) on to field of the roof. 4. Install a second ply of modified flashing ply installed over the base flashing ply, 9 inches (228 mm) on to field of the roof. Attach top of membrane to top of wood curb and nail at 8 inches (203 mm) o.c. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize. 5. Install pre-manufactured cover. Fasten sides at 24 inches (609 mm) o.c. with fasteners and neoprene washers. Furnish all joint cover laps with butyl tape between metal covers. 6. Set equipment on neoprene pad and fasten as required by equipment manufacturer. F. Roof Drain: 1. Plug drain to prevent debris from entering plumbing. 2. Taper insulation to drain minimum of 24 inches (609 mm) from center of drain. 3. Run roof system plies over drain. Cut out plies inside drain bowl. 4. Set lead/copper flashing (30 inch square minimum) in 1/4 inch bed of mastic. Run lead/copper into drain a minimum of 2 inches (50 mm). Prime lead/copper at a rate of 100 square feet per gallon and allow to dry. 5. Install base flashing ply (40 inch square minimum) in bitumen. 6. Install modified membrane (48 inch square minimum) in bitumen. 7. Install clamping ring and assure that all plies are under the clamping ring. 8. Remove drain plug and install strainer. G. Pitch Pocket Umbrella: 1. Run all plies up to the penetration. 2. Place the pitch pocket over the penetration and prime all flanges. 3. Strip in flange of pitch pocket with one ply of base flashing ply. Extend 6 inches (152 mm) onto field of roof. 4. Install second layer of modified membrane extending 9 inches (228 mm) onto field of the roof. 5. Fill pitch pocket half full with non-shrink grout. Let this cure and top off with pourable sealant. 6. Caulk joint between roof system and pitch pocket with roof cement. 7. Place a watershedding type bonnet over the top of the pitch pocket and clamp the top with a drawband collar. Caulk the upper edge of the band with an elastomeric sealant. 3.6 PROTECTION A. Provide traffic ways, erect barriers, fences, guards, rails, enclosures, chutes and the like to protect personnel, roofs and structures, vehicles and utilities