WARREN WWTF IMPROVEMENTS ADDENDUM NO. 6

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1 WARREN WWTF IMPROVEMENTS NOTICE is hereby given to prospective Bidders of the following information, clarifications, and modifications to the Bidding Documents. The Bidding Documents remain unchanged except as indicated below. Bidders must acknowledge receipt of this Addendum in the Bid Form and comply with the requirements for submission of Bids as set forth in the Bidding Documents. INFORMATION The deadline to submit General Bids is Tuesday, November 21, 2017, at 2:00 PM at the Town Clerk s Office in Town Hall, 514 Main Street, First Floor, Warren, RI Bids will then and there be publicly opened and read aloud. The deadline to submit questions for the General Bid opening has passed. CLARIFICATIONS The following revisions are to be made to the referenced drawing(s) and section(s) are to be issued as a replacement herewith in their entirety, have an Issue Date of November 2017, contain(s) referend to in the footer. 1. Replace all references to New Ballasted EPDM Roofs on Drawings and replace with New Fully Adhered EPDM Membrane Roof. 2. Replace Section , ELASTOMERIC MEMBRANE ROOFING LOOSE LAID BALLSTED with Section , ELASTOMERIC MEMBRANE ROOFING FULLY ADHERED, consisting of 8 pages, see attached. This Addendum is provided to Bidders in a single Portable Document Format (.PDF) posted on Procore and will be available for examination at the Issuing Office. It is each Bidder s responsibility to check the Procore for Addenda per the Instructions to Bidders. Prepared and Issued by Woodard & Curran (Engineer) on behalf of: The Town of Warren, Rhode Island WOODARD & CURRAN -1

2 SECTION ELASTOMERIC MEMBRANE ROOFING - FULLY ADHERED PART 1 GENERAL 1.1 SUMMARY A. Section includes insulation and membrane roofing, base flashings roofing membrane expansion joint, Counter-flashings. B. Related Sections: 1. Section Miscellaneous Rough Carpentry: Wood nailers 2. Section Sheet Metal Flashing and Trim: Counterflashing and roof edge material. 1.2 REFERENCES A. ASTM International: 1. ASTM C79/C79M - Standard Specification for Gypsum Sheathing Board. 2. ASTM C177 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus. 3. ASTM C208 - Standard Specification for Cellulosic Fiber Insulating Board. 4. ASTM C552 - Standard Specification for Cellular Glass Thermal Insulation. 5. ASTM C578 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. 6. ASTM C728 - Standard Specification for Perlite Thermal Insulation Board. 7. ASTM C Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board. 8. ASTM C Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers. 9. ASTM C Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer. 10. ASTM D412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension. 11. ASTM D624 - Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers. 12. ASTM D746 - Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact. 13. ASTM D822 - Standard Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings. 14. ASTM D Standard Test Method for Tear Resistance (Graves Tear) of Plastic Film and Sheeting. 15. ASTM D Standard Specification for Poly(Vinyl Chloride) Sheet Roofing. WOODARD & CURRAN

3 16. ASTM D Standard Specification for EPDM Sheet Used in Single-Ply Roof Membrane. 17. ASTM D Standard Specification for Reinforced Non-Vulcanized Polymeric Sheet Used in Roofing Membrane. 18. ASTM D Standard Specification for Thermoplastic Polyolefin Based Sheet Roofing. 19. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials. 20. ASTM E96/E96M - Standard Test Methods for Water Vapor Transmission of Materials. 21. ASTM E108 - Standard Test Methods for Fire Tests of Roof Coverings. 22. ASTM E119 - Standard Test Methods for Fire Tests of Building Construction and Materials. 23. ASTM E408 - Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques. 24. ASTM E903 - Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres. 25. ASTM E Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field. 26. ASTM E Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces. B. FM Global: 1. FM DS Wind Loads to Roof Systems and Roof Deck Securement. 2. FM Approval Standard for Class 1 Insulated Steel Deck Roofs. C. Intertek Testing Services (Warnock Hersey Listed): 1. WH - Certification Listings. D. National Roofing Contractors Association: 1. NRCA - The NRCA Roofing and Waterproofing Manual. E. Single Ply Roofing Institute: 1. SPRI ES-1 - Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems. F. Underwriters Laboratories Inc.: 1. UL - Fire Resistance Directory. 2. UL Tests for Fire Resistance of Roof Covering Materials. 3. UL Fire Test of Roof Deck Construction. 4. UL Uplift Tests for Roof Covering Systems. G. U.S. Environmental Protection Agency: 1. ENERGY STAR - ENERGY STAR Voluntary Labeling Program. WOODARD & CURRAN

4 1.3 SYSTEM DESCRIPTION A. Elastomeric Sheet Membrane Conventional Roofing System: One ply membrane system with sheathing, insulation, and adhesive applied membrane. 1.4 DESIGN REQUIREMENTS A. Low Slope Membrane Roof Edge Securement: Conform to SPRI ES-1 for wind speeds determined from applicable Rhode Island Building Code for hurricane prone zones. 1.5 PERFORMANCE REQUIREMENTS A. Roof Assembly Classification: FM Class 1 Construction, windstorm classification of I- 180 in accordance with FM DS SUBMITTALS A. Section Submittal Procedures: Submittal procedures. B. Shop Drawings: Indicate setting plan for tapered insulation, joint and termination detail conditions, conditions of interface with other materials. Indicate membrane layout and seam locations. C. Product Data: Submit characteristics on membrane materials, adhesives, seaming materials, flashing materials and insulation. D. Samples: Submit two 6x6 inch in size illustrating insulation. E. Manufacturer's Installation Instructions: Submit special precautions required for seaming membrane. F. Manufacturer's Certificate: Certify Products to meet or exceed specified requirements. 1.7 QUALITY ASSURANCE A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual. B. Roof Assembly Fire Classification: Minimum Class A when tested in accordance with ASTM E108 or UL Roof Assembly with Foam Insulation: Passes FM 4450 or UL C. Surface Burning Characteristics: 1. Foam Insulation: Maximum 75/450 flame spread/smoke developed index when tested in accordance with ASTM E84. WOODARD & CURRAN

5 D. Apply label from agency approved by authority having jurisdiction to identify each roof assembly component. E. Maintain one copy of each document on site. 1.8 QUALIFICATIONS A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years documented experience. B. Applicator: Company specializing in performing Work of this section with minimum 5 years documented experience approved by manufacturer. 1.9 PRE-INSTALLATION MEETINGS A. Administrative Requirements: Preinstallation meetings. B. Convene minimum one week prior to commencing Work of this section. C. Review preparation and installation procedures and coordinating and scheduling required with related Work DELIVERY, STORAGE, AND HANDLING A. Product Requirements: Requirements for transporting, handling, storing, and protecting products. B. Deliver products in manufacturer s original containers, dry, undamaged, with seals and labels intact. C. Store products in weather protected environment, clear of ground and moisture. D. Protect foam insulation from direct exposure to sunlight ENVIRONMENTAL REQUIREMENTS A. Product Requirements: Environmental conditions affecting products on site. B. Do not apply roofing membrane during inclement weather, ambient temperatures below manufacturer's recommendations without proper weather protection. C. Do not apply roofing membrane to damp or frozen deck surface or when precipitation is expected or occurring. D. Do not expose materials vulnerable to water or sun damage in quantities greater than can be weatherproofed during same day. WOODARD & CURRAN

6 1.12 COORDINATION A. Administrative Requirements: Coordination and project conditions. B. Coordinate Work with installation of associated roof penetrations and metal flashings, as Work of this section proceeds WARRANTY A. Execution and Closeout Requirements: Requirements for warranties. B. Furnish 20 year manufacturer's warranty including coverage of materials and installation resulting from failure to resist penetration of moisture. PART 2 PRODUCTS 2.1 SINGLE PLY ROOFING - FULLY ADHERED A. Manufacturers: 1. Carlisle SynTec Systems Model Sure Seal. 2. Firestone Building Products Co 3. Substitution: As Approved 2.2 COMPONENTS A. Membrane: ASTM D4637; inch thick Type I, EPDM: 1. Roof Surface: Minimum solar reflectance index SRI of 29 for 75 percent of roof area, calculated in accordance with ASTM E1980. a. Reflectance: Measured in accordance with ASTM E903, ASTM E1918, or ASTM C1549. b. Emittance: Measured in accordance with ASTM E408 or ASTM C1371. B. Seaming Materials: As recommended by membrane manufacturer. C. Washer Disc: Membrane material with adhesive backing. D. Battens: As recommended by the manufacturer. E. Adhesive Materials: 1. Surface Conditioner: Ttype, compatible with membrane. 2. Membrane Adhesives: As recommended by membrane manufacturer. 3. Insulation Adhesive: As recommended by insulation manufacturer. 4. Thinner and Cleaner: As recommended by adhesive manufacturer, compatible with sheet membrane. WOODARD & CURRAN

7 F. Insulation: ASTM C1289, Type II, Class I, faced rigid cellular polyisocyanurate roof insulation, with the following characteristics: 1. Board Size: 48x96 inch. 2. Board Thickness: 4" of minimum cover. Tapered Insulation at Sludge Handling Building. 3. Board Edges: ship lap with overlapping seams. 4. Compressive Strength: Minimum 25 psi. 5. Minimum R-Value: 5.6 min per inch G. Flexible Flashings: Same material as membrane. H. Counter-flashings: As specified in Section Sheet Metal Flashings and Trim. 2.3 ACCESSORIES A. Sheathing Adhesive: Non-combustible type, for adhering gypsum sheathing to metal deck. B. Insulation Joint Tape: Asphalt treated glass fiber reinforced 6 inches wide; self adhering. C. Insulation Fasteners: Appropriate for purpose intended and approved by Factory Mutual and system manufacturer; length required for thickness of material. D. Sealants: As recommended by membrane manufacturer. E. Strip Reglet Devices: Galvanized steel; maximum possible lengths per location, with attachment flanges. F. Walkway Pads: 24x24 inch size. G. Stack Boots: Flexible boot and collar for pipe stacks through membrane. PART 3 EXECUTION 3.1 EXAMINATION A. Administrative Requirements: Coordination and project conditions. B. Verify surfaces and site conditions are ready to receive Work. C. Verify deck is supported and secure. D. Verify deck is clean and smooth, free of depressions, waves, or projections, properly sloped to drains, valleys and suitable for installation of roof system. WOODARD & CURRAN

8 E. Verify deck surfaces are dry and free of snow or ice. F. Confirm dry deck by moisture meter with moisture content acceptable to roofing manufacturer. G. Verify roof openings, curbs, pipes, sleeves, ducts, and vents through roof are solidly set, and reglets are in place. 3.2 PREPARATION A. Concrete Deck: 1. Fill surface honeycomb and variations with latex filler. 3.3 INSTALLATION A. Insulation Application: 1. Ensure deck is clean and dry. 2. Apply adhesive to deck. Embed insulation into adhesive with full contact. 3. Apply adhesive to top surface of insulation. Embed second layer of insulation into adhesive, with joints staggered minimum 12 inch from joints of first layer. 4. Place constant thickness first layer and tapered thickness insulation second layer to required slope pattern. 5. Minimum Total Insulation Thickness: 4 inch as required to obtain a minimum R- Value of Lay boards with edges in moderate contact without forcing. Cut insulation to fit neatly to perimeter blocking and around penetrations through roof. 7. Lay tapered boards and cut boards to slope for distance of 24 inches back from roof drains for positive drainage. 8. Apply no more insulation than can be covered with membrane in same day. 9. Tape joints of insulation. B. Membrane Application: 1. Apply primer. 2. Mechanically attach membrane disc to roof assembly. 3. Apply adhesive as recommended by manufacturer. 4. Roll out membrane, free from air pockets, wrinkles, or tears. Firmly press sheet into place without stretching. 5. Bond sheet to substrate except those areas directly over or within 3 inches of control or expansion joint. 6. Overlap edges and ends and seal by solvent welding or contact adhesive as required by hurricane prone zone conformance, minimum 3 inches. Seal permanently waterproof. Apply uniform bead of sealant to joint edge. 7. [Shingle joints on sloped substrate in direction of drainage.] [Apply joint tape and seal.] 8. Extend membrane up cant strips minimum of 6 inches onto vertical surfaces. WOODARD & CURRAN

9 9. Seal membrane around roof penetrations. C. Flashings And Accessories: 1. Apply flexible flashings to seal membrane to vertical elements. 2. Secure to nailing strips at 4 inches o.c. and reglets. 3. Install prefabricated roofing control and expansion joints to isolate roof into areas as indicated on Drawings. Make joints watertight. 4. Coordinate installation of roof drains and related flashings. 5. Seal flashings and flanges of items penetrating membrane. 6. Install walkway pads. Space pad joints to permit drainage. 3.4 FIELD QUALITY CONTROL A. Refer to Quality Requirements and - Execution and Closeout Requirements: Field inspecting, testing, adjusting, and balancing. 3.5 CLEANING A. Execution and Closeout Requirements: Final cleaning. B. In areas where finished surfaces are soiled by Work of this section, consult manufacturer of surfaces for cleaning advice and conform to their documented instructions. C. Repair or replace defaced or disfigured finishes caused by Work of this section. 3.6 PROTECTION OF INSTALLED CONSTRUCTION A. Execution and Closeout Requirements: Protecting installed construction. B. Protect building surfaces against damage from roofing Work. C. Where traffic must continue over finished roof membrane, protect surfaces. END OF SECTION WOODARD & CURRAN