SECTION ELASTOMERIC MEMBRANE ROOFING ADDENDUM 10 APRIL 20, 2011

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1 SECTION ELASTOMERIC MEMBRANE ROOFING ADDENDUM 10 APRIL 20, 2011 PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Elastomeric roofing membrane (EPDM), conventional application at low slope roof areas as indicated on Contract Drawings. 2. Base flashings. 3. Roofing cant strips, accessories, and walkway pads. B. Related Sections: 1. Section Rough Carpentry: Plywood substrate, perimeter pressure-treated nailers, curbs, and cant strips. 2. Section Sheet Metal Flashing and Trim: Counter flashings, reglets, and scuppers REFERENCES A. Reference Standards: See Section Comply with following: 1. NRCA ML104 - The NRCA Roofing and Waterproofing Manual; National Roofing Contractors Association; Fourth Edition. 2. UL (RMSD) - Roofing Materials and Systems Directory; Underwriters Laboratories Inc.; current edition PERFORMANCE REQUIREMENTS A. General: Install a watertight, elastomeric membrane roofing (EPDM) and base flashing system with compatible components that will not permit the passage of liquid water and will withstand wind loads, thermally induced movement, and exposure to weather without failure B. FM Listing: Provide elastomeric membrane roofing (EPDM), base flashings, and component materials that meet requirements of FM 4450 and FM 4470 as part of a roofing system and that are listed in FM's "Approval Guide" for Class 1 or noncombustible construction, as applicable. Identify materials with FM markings. 1. Fire/Windstorm Classification: Comply with Class 1A-90 C. Roofing System Design: Provide a roofing system that complies with roofing system manufacturer's written design instructions and with the following: 1. SPRI's "Wind Design Guide for Adhered Roofing Systems." 1.04 SUBMITTALS A. See Section Administrative Requirements, for submittal procedures. 1. Product Data: Provide data indicating membrane and bitumen materials, base flashing materials. 2. Shop Drawings: Indicate joint or termination detail conditions, conditions of interface with other materials, setting plan for tapered insulation, and mechanical fastener layout. 3. Manufacturer's Installation Instructions: Indicate special procedures and perimeter conditions requiring special attention. 4. Manufacturer's Field Reports: Submit in accordance with Section after inspection of roofing system to verify satisfactory conditions for start of installation and satisfactory completed installation. a. Indicate procedures followed, ambient temperatures, humidity, wind velocity during ELASTOMERIC MEMBRANE ROOFING

2 application, and supplementary instructions given. 5. Warranty: Submit manufacturer warranty and ensure forms have been completed in Owner's name and registered with manufacturer QUALITY ASSURANCE A. Perform work in accordance with NRCA Roofing and Waterproofing Manual and manufacturer's instructions. B. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this section with minimum five years of documented experience. C. Applicator Qualifications: Company licensed by manufacturer and specializing in performing the work of this section with minimum five years documented, continuous, recent experience in Maryland. D. Record of Work: Keep record indicating temperature and moisture conditions and type and location of work being done during each day of roofing operations DELIVERY, STORAGE, AND PROTECTION A. General: Comply with Section Deliver products in manufacturer's original containers, dry, undamaged, with seals and labels intact. 2. Handle insulation to prevent damage to edges or ends. 3. Store products in weather protected environment, clear of ground and moisture. 4. Materials that become wet will be subject to rejection. 5. Replace damaged materials PROJECT CONDITIONS A. Coordinate the work with installation of associated counter flashings installed by other sections as the work of this section proceeds ENVIRONMENTAL REQUIREMENTS A. Do not apply roofing membrane during unsuitable weather. 1. Comply with manufacturer's recommendations. Do not apply roofing membrane when ambient temperature is below 40 degrees F (5 degrees C). Follow manufacturer's recommendations during hot weather. 2. Do not apply roofing membrane to damp or frozen deck surface or when precipitation is expected or occurring. B. Do not expose materials vulnerable to water or sun damage in quantities greater than can be weatherproofed the same day WARRANTY A. See Section Closeout Submittals, for additional warranty requirements. 1. Correct defective Work within a two year period after Date of Substantial Completion. 2. Warranty: By material manufacturer, fabricator, installer, and Contractor, jointly and severally, and signed by officers of each company. 3. Provide fifteen year no dollar limit material and labor warranty for total roofing system to cover failure to prevent penetration of water. ELASTOMERIC MEMBRANE ROOFING

3 PART 2 PRODUCTS 2.01 MANUFACTURERS A. Membrane Materials: 1. Johns Manville Corp. 2. Carlisle Syn Tec. 3. Firestone Corp. 4. Substitutions: See Section Product Requirements ROOFING - CONVENTIONAL APPLICATION A. Modified Bituminous Roofing: Comply with NRCA Specification Plate MBS-N-M-C-M. 1. Specification is based upon Johns Manville specification number 2PND. B. Roofing Assembly Requirements: 1. Roof Covering External Fire-resistance Classification: UL Class A. 2. Factory Mutual Classification: Class I and windstorm resistance of I-90, in accordance with FM DS MEMBRANE AND PRODUCT MATERIALS A. Membrane: EPDM (Ethylene, Propylene, Diene Terpolymer) white-on-black. 1. Provide Carlisle. Sure-White (white-on-black), maximum 10' wide, 60-mil thick reinforced EPDM, or substitute in accordance with Section Flashing, System Materials and accessories: Bonding Adhesive, Splice Cleaner, Splicing Cement, In-Seam Sealant, Lap Sealant, Primer, bonding tape, Cured EPDM Flashing, Pressure-Sensitive Flashing, uncured Elastoform Flashing, Seam Fastening Plates, Water Based Bonding Adhesive, Walkway Pads/Rolls, Pre- Molded Pipe Flashings, Cured EPDM Flashing, Pressure-Sensitive Inside/Outside Corners, Pipe Flashings and Pourable Sealer Pockets. Other products, such as, insulation, insulation fasteners, edgings and termination bars may also be required ACCESSORIES A. Provide all accessories required for complete installation, and as required to qualify for specified warranties. 1. Prefabricated Cant and Edge Strips: Perlite board, compatible with roofing materials; cants formed to 45 degree angle, tapered edge strips, and other configurations as detailed. 2. Tapered Insulation: Perlite boards, tapered at 1/8 per foot, minimum. 3. Fill Insulation: Minimum ½ thick perlite or polyisocyanurate rigid board insulation 4. Sealants: As recommended by membrane manufacturer. PART 3 EXECUTION 3.01 EXAMINATION A. Verify that surfaces and site conditions are ready to receive work. 1. Verify deck is supported and secure. 2. Verify deck is clean and smooth, flat, free of depressions, waves, or projections, properly sloped and suitable for installation of roof system. 3. Verify deck surfaces are dry and free of snow or ice. 4. Verify that roof openings, curbs, and penetrations through roof are solidly set, and cant strips, nailing strips, and reglets are in place. 5. Verify that work of other trades which penetrates roof deck has been completed. ELASTOMERIC MEMBRANE ROOFING

4 3.02 WOOD DECK PREPARATION A. Verify flatness and tightness of joints of wood decking. Fill knot holes with latex filler. 1. Confirm dry deck by moisture meter with 12 percent moisture maximum. B. The structure shall be sufficient to withstand normal construction loads and live loads. Defects in the roof deck must be reported and documented to the architect, general contractor and building owner for assessment. The Roofing applicator shall not proceed unless the defects are corrected. C. Minimum 7/16" thick oriented strand board (OSB) is required. Fasteners are recommended with a minimum pullout of 250 pounds per fastener. The substrate must be even without noticeable high spots or depressions, and must be free of accumulated water, ice or snow. D. Install deck underlayment as required by Membrane manufacturer PROTECTION OF WORK OF OTHER TRADES A. Protect paving and building walls adjacent to hoist prior to starting work. Lap suitable protective materials at least six inches. Secure protective coverings against wind. Leave protective covering in place for duration of roofing work MEMBRANE APPLICATION A. Apply membrane in accordance with manufacturer's instructions and with Referenced Standards. 1. When feasible, begin the application at the highest point of the highest roof level and work to the lowest point to prevent moisture infiltration and to minimize construction traffic on completed sections. Include completion of all flashings and terminations. B. Apply membrane system smooth, free from air pockets, wrinkles, fish-mouths, or tears. Ensure full bond of membrane to substrate. Follow criteria outlined in the manufacturer s technical installation manual to prepare the roof deck or the substrate prior to the application of the new roofing system. C. Install underlayment when required by Membrane manufacturer. Mechanically fastened to the roof deck with 1 insulation fastener and plate per every 2 square feet of insulation. 1. When mechanical attachment of the insulation is not desired, use manufacturer s adhesive or a solid mopping of hot asphalt. D. Fully adhere the EPDM membrane to the acceptable substrate with roof system s Bonding Adhesive at the rate specified on the container label. E. Overlap adjacent EPDM membrane sheets a minimum of 3". F. Membrane Splicing: 1. Apply Primer to the splice area. 2. Position manufacturer s tape onto bottom membrane sheet with the edge of the release film along a line marked 1/2" out from the top sheet. Press tape onto sheet using hand pressure, overlapping tape roll ends a minimum of 1". 3. Remove the release film and press top sheet onto tape using hand pressure. Roll the splice with a 2" wide steel roller. 4. Install a 6" wide section of manufacturer s flashing over all field splice intersections and seal edges of flashing with Lap Sealant. The use of Lap Sealant with tape splices is optional except at cut edges of reinforced membrane and at tape overlaps. G. EPDM membrane must be secured at the perimeter of each roof level, roof section, expansion joint, curb, skylight, interior wall, penthouse, etc., at any angle change which exceeds 2" in one horizontal foot, and at other penetrations in accordance with manufacturer s approved details. Additional membrane securement may be provided by reinforced securement strips or seam ELASTOMERIC MEMBRANE ROOFING

5 fastening plates. H. Flash all penetrations and walls with Cured EPDM membrane or Flashing. 1. Uncured Flashing and Pressure-Sensitive Uncured Flashing shall be limited to overlay vertical seams (as required at angle changes) or to flash inside and outside corners, scuppers, pourable sealer pockets and other penetrations or unusually shaped walls where the use of cured membrane flashing or Pressure-Sensitive Flashing (semi-cured) is not practical. 2 Manufacturer s Prefabricated accessories (Pre-Molded Pipe Seals and Pressure-Sensitive Products; such as, Flashing, Pourable Sealer Pockets, Pipe Seals and Inside/Outside Corners) should be used, when feasible, in lieu of uncured Elastoform Flashing. 3 When using Pressure-Sensitive Flashing (semi-cured only) to overlay Fastening Plates or metal edging flanges, etc., Manufacturer s Primer must be used to clean the membrane and metal surfaces. Lap Sealant is optional on straight runs of Pressure-Sensitive Flashing and around Pressure-Sensitive Pipe Seals. 4 Terminate the flashing in accordance with Manufacturer s recommended Termination. 5. Walkways are required at all traffic concentration points (i.e., roof hatches, access doors, rooftop ladders, etc.), regardless of traffic frequency. Walkways are also required if regular maintenance (once a month or more) is necessary to service rooftop equipment. a. Walkway Pads/Rolls must be adhered to the membrane with Splicing Cement or Tape. Pressure-sensitive Walkway Pads (with manufacturer s adhesive pre-applied to the walkway underside are acceptable. 6. Copings, counterflashing and other metal work shall be fastened to prevent the metal from pulling free or buckling and sealed to prevent moisture from entering the roofing system or building FIELD QUALITY CONTROL A. See Section Quality Requirements, for general requirements for field quality control and inspection. At Owner s option, provide the following. Verify with Owner for inclusion in the scope of work. 1. Flood Test: Architect and Owner will select location of roof areas to be tested. On completion of horizontal membrane installation, dam installation area in preparation for flood testing. a. Flood to minimum depth of 1 inch (25 mm) with clean water. After 48 hours, inspect for leaks. b. If leaking is found, remove water, repair leaking areas with new waterproofing materials as directed by Architect; repeat flood test. Repair damage to building. c. When area is proven watertight, drain water and remove dam. 2. Require site attendance of roofing material manufacturers at pre-installation meeting, flood testing, and during installation of the Work CLEANING A. Remove debris and any potentially damaging material from finished surfaces. 1. In areas where finished surfaces are soiled caused by work of this section, consult manufacturer of surfaces for cleaning advice and conform to their documented instructions. B. Repair or replace defaced or damaged finishes caused by work of this section PROTECTION OF FINISHED WORK A. Protect installed roofing and flashings from construction operations. 1. Where traffic must continue over finished roof membrane, protect surfaces using durable materials. END OF SECTION ELASTOMERIC MEMBRANE ROOFING