CSI Division 7 Specification

CSI Division 7 Guide Specification TIEMPO™+ 2000 TPO Vented Roof System

CSI Division 7 Guide Specifications TIEMPO™+ 2000 TPO MEMBRANE VENTED ROOF SYSTEM

Part 1 - General project is not authorized for installation and is not eligible for Warranty. 1.01 Description 1.03 Submittals A. Furnish and install the TIEMPO™+ 2000 TPO Vented Roof System (VRS) in accordance with drawings and A. Minimum job file submittal information for consideration specifications approved by Dow Roofing Systems (DRS). for labor and material warranty coverage shall be an accurately completed Request for Warranty form NOTE: No installation will be accepted for Dow Roofing (www.dowrfw.com) and the information discussed in Systems VRS Warranty unless the complete Request for paragraph B following. Warranty (RFW) has been received and approved by DRS prior to job start. B. Authorized Applicators must submit a roof drawing indicating which details will be employed in the project. 1. Applications that involve severe exposures, ASCE These drawings shall be approved by DRS prior to the Ground Roughness Category D, and those conditions start of work, and must include: outline and size of the outlined in section 3.03 require review by Dow roof, location and type of penetrations, perimeter and Roofing Systems Technical Review Department penetration flashing detail references, and a copy of any before any specification is valid. (Reference Table 2, non-DRS details to be used. Details which do not ASCE Exposure Chart). Buildings operating with conform to DRS Standard Detail Drawings must be interior positive pressure at the deck require review submitted to DRS Technical Review Department for by DRS Technical Review Department before any approval. specification is valid. C. Samples and data sheets of all materials not supplied or B. Related work: Metal work other than DRS Edge Metal approved by DRS shall be submitted to DRS for written Systems is not covered by DRS for Warranty. Metal work approval prior to the start of installation. must be secured in a manner approved by DRS, SMACNA guidelines, and/or in compliance with ES-1 1.04 Delivery and Storage where applicable. All metal work that is part of the waterproofing envelope must be sealed, structurally A. All materials provided by DRS shall be delivered with sound, and appropriately anchored to prevent leakage. appropriate packaging labels indicating warnings, storage conditions, lot numbers, and usage instructions. 1.02 Quality Assurance B. Materials shall be stored in their original undamaged A. Apply roofing system using a roofing applicator packaging and storage conditions shall be maintained in authorized by DRS. Applicator must have written accordance with the manufacturer’s requirements. certification by DRS for approval to install the VRS System. 1.05 Precautions B. TIEMPO™+ 2000 TPO membrane is classified by A. Adhesives, solvents, and caulks are potentially Underwriters Laboratories as a Class A sheathing flammable and/or toxic. Follow precautions indicated on material for use in construction of Class A roofing containers and packaging labels. assemblies. See UL’s Roofing Materials & Systems B. Surfaces to be bonded shall be dry, clean and free of Directory for specific assemblies. debris. Suitable surfaces are usually considered to be C. Inspection: Job start training by a DRS Technical smooth; solid masonry, wood, and metal, plus insulation Representative is mandatory for all VRS installations. board fastened to the specific manufacturers Upon completion of the installation, an inspection shall recommendations for receiving adhered roofing be performed by a representative of DRS to ascertain membranes and accepted by DRS for adhered that the roofing membrane system has been installed applications of TIEMPO™+ 2000 TPO membrane. according to DRS approved specifications and details. C. Fasteners should be installed with a depth-sensing Upon approval of the project, a Warranty shall be written. screw gun to prevent overdriving or underdriving D. Changes: Should there be deviations or changes from this specification without written approval from DRS or the submitted construction conditions are inaccurate, the

®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. T2000 VRS 09.09. 1 CSI Division 7 Guide Specification TIEMPO™+ 2000 TPO Vented Roof System

D. Block off or shut down positive pressure building review and approval prior to the start of work. ventilation systems during application to prevent sheet from billowing during application. 2.02 Membrane E. Consideration should be given in the project design to A. Membrane shall be 0.045-in., 0.060-in. or 0.080-in. potential safety problems that can precipitate from the nominal thickness overall, scrim-reinforced, ethylene smooth surface characteristic of the TIEMPO™+ 2000 propylene-based sheet in widths 5, 8, or 10-ft wide by sheet. The membrane surface becomes slippery when appropriate length conforming to the minimum physical wet. If access to roof is required, walkway surfaces are properties in Table 1, Physical Properties Chart. highly recommended. In northern climates, sliding snow TIEMPO™+ 2000 TPO membrane is available in white. could create a hazard below and adjacent to the Contact your DRS representative for thickness options, perimeter if a retarding system is not installed on roofs minimums and lead times. TIEMPO™+ 2000 TPO with slopes greater than 2-in. per foot. Membranes meet the ASTM 6878-06 specification for TPO-based roofing material. Packaging to bear the UL F. Job specification and retrofit preparation should always label. include provision to ensure positive drainage in all areas. Good roofing practice does not permit uncontrolled, 2.03 Related Materials uncollected drainage over the edge of a roof. A. Insulation/underlayment/recover board: DRS supplies G. All rooftop mechanical units are to have their a wide range of insulations, underlayments and condensation lines piped to drains, or off the roof. coverboards to satisfy a broad spectrum of design H. Grease shall not be allowed to accumulate onto the roof. conditions. Only DRS supplied insulation products can If rooftop grease units are not to receive a continual be used for warranty coverage. (Reference Appendix 2- maintenance program, they are to have an approved M, DRS Approved Insulation List and Fastening Rates grease containment system specified. for Mechanically Attached Systems). I. At the discretion of DRS, excessive patching as a result 1. STYROFOAM™ Brand Extruded Polystyrene of damage to the TIEMPO™+ 2000 TPO membrane or Foam Insulation (XPS): Extruded polystyrene caused by faulty installation may require total recover in closed-cell foam panel with continuous skin on face those areas. and back surface that meets ASTM C-578, Standard Specification for Rigid Cellular Polystyrene Thermal J. Buildings with canopies or large wall openings, e.g. Insulation. (Reference Dow Technical Data Sheets hangar doors and truck docks or buildings that are for additional information). otherwise subject to positive pressurization from wind or air handling systems, consult DRS suitability of 2. TERMICO™ Polyisocyanurate Insulation: Closed- application and possible design enhancement cell HCFC FREE polyisocyanurate foam core requirements. manufactured and integrally laminated to heavy non- asphaltic, fiber-reinforced felt facers; Available in 1.06 Warranty compressive strength 20 psi or 25 psi. (Reference DRS Technical Data Sheets for additional A. A DRS representative shall inspect the installation for information). compliance with applicable DRS specifications upon completion of the roofing system. 3. TERMICO™ Polyisocyanurate Insulation Tapered: Closed-cell HCFC FREE polyisocyanurate foam core B. Upon acceptance of the roofing system installation, a manufactured and integrally laminated to a heavy DRS standard or Total System Warranty will be issued non-asphaltic, fiber-reinforced felt facers; Available in for a five (5), ten (10) or fifteen (15) year period covering compressive strength 20 or 25 psi. (Reference DRS wind damage up to 60 mph. Technical Data Sheets for additional information). C. For additional information see General Warranty section 4. TERMICO™ ISO 3000: Closed-cell HCFC FREE of the DRS Technical Manual or at polyisocyanurate foam core manufactured and www.dowroofingsystems.com. integrally laminated to a heavy coated-glass facers; Is available in 20 or 25 psi compressive strength. PART 2 - PRODUCTS (Reference DRS Technical Data Sheets for additional information). 2.01 General 5. TERMICO™ HP-FR: Closed-cell HCFC FREE A. DRS supplies a full line of accessory components to polyisocyanurate foam manufactured and integrally complete the construction of DRS membrane roofing laminated to a heavy, durable and dimensionally system. These parts shall be used when applicable in stable inorganic coated-glass facers. CFC-, HCFC assemblies requiring a DRS Warranty. Materials for and HFC-free foam blowing technology with zero warranted systems are described or specified herein. (negligible) global warming potential (GWP). Dow Materials other than those supplied by DRS shall be TERMICO™ HP-FR is available in 20 psi submitted to the DRS Technical Review Department for compressive strength. (Reference DRS Technical

Data Sheets for additional information). substrates. Please consult the appropriate Technical Data Sheet for detailed information or contact DRS Technical 6. DensDeck® Roof Boards: (Reference Technical Review Department. Data Sheets for additional information). 6. Dow 2000 Membrane Cleaner: Dow 2000 a. Georgia-Pacific Gypsum Corporation 1/4-in. Membrane Cleaner is a surface cleaner for use with DensDeck Roof Board, 1/2-in DensDeck Roof TIEMPO™+ 2000 TPO membranes that have Board and 5/8-in.Type X Roof Board. become dirty or contaminated prior to heat welding. Nonstructural, glass mat faced gypsum panel with water-resistant core available in 4-ft.x8-ft. sizes 7. Dow 2000 Flashing Tape and Dow 2000 Tape and 4-ft.x4-ft.sizes. Primer: 6-in. wide x 0.60-in. thick, packaged 100-ft. b. Georgia-Pacific Gypsum Corporation 1/4-in. rolls. This product is made with unsupported DensDeck Prime Roof Board, 1/2-in. DensDeck membrane with a butyl tape backing (with a release Prime Roof Board and 5/8-in. DensDeck Prime paper) and is the preferred method for stripping-in Roof Board (Type X). Glass mat faced gypsum non-DRS gravel stop and drip edge metal (not for use with non-asphaltic, highly filled proprietary on Dow 2000 Clad Metal). Surfaces must be heatcured coating on one side available in 4-ft.x8- prepared with Dow 2000 Tape Primer prior to Dow ft. and 4-ft.x4-ft. sizes. 2000 Flashing Tape application. 7. Expanded Polystyrene (EPS): ASTM C578-04a 8. DRS VRS Air Valves: Shall be supplied by Dow expanded polystyrene thermal rigid board insulation Roofing Systems and installed in accordance with DR with a minimum density of 1.25 lbs./cu.ft. (ft3). and DRV Detail Drawings. (Reference DRS Technical Data Sheets for additional 9. Ballast: Reference Section 3.03 Ballast information) Requirements in this specification for ballast size and B. Flashing Membrane: Flashing shall be 0.045-in. or weight requirements. 0.060-in, thick membrane for walls and curbs. D. Mechanical fasteners: All air seal terminations shall be Unsupported 0.060-in. thick, Ethylene Propylenebased made per DRS approved details utilizing fasteners membrane shall be supplied for field-fabricated vent supplied by DRS (Reference Appendix 1, DRS Fastener stacks, pipes, drains, and corners. Selection Guide). When insulation is to be mechanically C. Adhesives, sealants, primers and caulks: attached, secure as directed in Appendix 2-M, DRS Approved Insulation List and Fastening Rates. 1. Dow 2000 Membrane Adhesives: Are designed for bonding all TIEMPO™+ 2000 TPO membranes to E. Dow 2000 Aluminum Termination bar: Dow 2000 wood, metal, masonry, and approved roof insulation Aluminum Termination Bar fastened 6-in. o.c. is the only board surfaces. authorized product. a. Dow 2000 Membrane Adhesive (Solvent Based) F. Dow 2000 Edge Metal Systems: DRS Edge Metal must be installed per standard DRS details. Dow 2000 Clad b. Dow 2000 Membrane Adhesive (Low-VOC) Metal may be used for gravel stops or drip edges. 2. Dow 2000 Multi-Purpose Sealant: Dow 2000 Multi- G. Dow 2000 Walkway Roll: When roof traffic is indicated Purpose Sealant is designed to be used as a water (for example to service rooftop units), a walkway over cutoff mastic, sealant to top off pitch boxes and as an the membrane shall be made. Dow 2000 Walkway Roll, exterior grade caulk for metal work. heat welded to the membrane, is recommended. 3. Dow 2000 Edge Sealant: Dow 2000 Edge Sealant is H. Dow 2000 TPO Pipe Boots/Vent Gloves: Are provided a solvent-based caulk developed to seal exposed cut as an alternative to 0.060-in. unsupported flashing for edges of reinforced membrane. vent stacks and pipes 1-in. to 6-in. diameter. 4. Dow 2000 Insulation Adhesive (2 Part Urethane): I. Dow 2000 TPO Universal Inside/Outside Corners: Are Dow 2000 Insulation Adhesive (2 part Urethane) is a provided as an alternative to 0.060-in. unsupported two part, polyurethane low rise foam that is applied in flashing for use at outside and inside corners. ribbons with appropriate dispensing equipment. J. Dow 2000 T-Joint Patch: Dow 2000 T-Joint Patches are 5. INSTA STIK™ Quik Set Insulation Adhesive: made with TIEMPO™+ 2000 TPO Unsupported INSTA STIK™ Quik Set Insulation Adhesive is a membrane and are used to cover T-joints in the single component polyurethane insulation adhesive membrane. Refer to Guide Specifications for installation dispensed from a portable, disposable, requirements. prepressurized container requiring no external power source. Product must be installed as required by K. Dow 2000 Flashing Tape and Dow 2000 Tape Primer: manufacturer. 6-in. wide x 0.060-in. thick, packaged 100-ft. rolls. This product is made with unsupported membrane with a DRS Insulation Adhesives are designed for bonding most butyl tape backing (with a release paper) and is the insulation and recover boards to a wide range of preferred method for stripping-in non-DRS gravel stop

and drip edge metal (not for use on DRS Clad Metal). “...vapor retarders should be considered for use when Surfaces must be prepared with Dow 2000 Tape Primer both of two conditions are anticipated: (1) the outside prior to Dow 2000 Flashing Tape application. mean, average January temperature is below 40°F (4.4°C), and (2) the expected winter, interior relative L. VRS Air Valves: Shall be supplied by Dow Roofing humidity is 45 percent or greater.” Consult design Systems and installed in accordance with DR and DRV professional or building designer for determination of Detail Drawings. vapor retarder requirement”. NOTE: In all high humidity situations consult DRS PART 3 - EXECUTION Technical Review Department and the insulation 3.01 Substrate Preparation manufacturer for specific application requirements. F. Nailers: Pressure preservative treated, wooden nailers A. The applicator shall be responsible for the suitability of shall be installed at gravel stops or drip edges. the substrate to accept TIEMPO™+ 2000 membrane. In reroofing, test cuts shall be made by the roofing 1. Reroofing: Use #2 or better wood treated for rot applicator to determine existing condition and deck resistance. Creosote and asphaltic preservatives are suitability. All noticeably damp, wet or deteriorated not acceptable. materials must be removed. In all cases, prior to the start of work the substrate shall be smooth and free of debris, 2. New roofing: A treated wood nailer is recommended. sharp edges, and other surface irregularities. Any Effective perimeter attachment must be achieved per unevenness or joints gapped greater than 1/4-in. in the standard DR Detail Drawings and/ or as specified by membrane substrate can cause inconsistent membrane architect/consultant. welds and must be avoided. Maximum slope allowed is 3. All construction: Nailer should be anchored with a one inch (1-in.) in twelve inches (12in.), for slopes suitable fastener for the application having a greater than one inch (1-in.) in twelve (12-in.) contact minimum withdrawal resistance of 100-lbs, staggered DRS Technical Review Department for acceptability. 6-in. o.c. within 8-ft. of an outside corner, and 12-in. B. Concrete deck: Surface shall be a monolithic structural o.c. along other perimeter areas. or lightweight concrete poured over structural concrete 4. All construction: Nailer thickness shall be chosen to (see 3.01.C) poured tightly at penetrations and match the top surface of adjacent construction ±1/4 perimeters which are dry, level, clean, smooth, free of in. This permissible variation shall not contribute to structural cracking or sharp edges, and suitable for ponding. acceptance of TIEMPO™+ 2000 membrane. Concrete deck must be dry, cured, and prepared smooth with dust 5. Nailers: Nailers around skylights, curbs, expansion removed. The membrane shall have a fastened joints, etc., are not required. Refer to DRV Details for expansion joint detail (as per DRV Detail Drawings) acceptable air seal at these locations. where deck joints exist or when crossing a building G. Existing flashings: Must be removed and completely expansion joint. cleaned off wherever new terminations and water stops NOTE: Any cracks or other breaches in the roof deck must are to be installed. Existing flashings may be left in place be sealed to prevent air infiltration into the system. Consult up to DRS termination areas when in good structural DRS Technical Review Department for acceptable sealing condition and solidly attached to substrates. techniques. H. New construction or reroof with complete tearoffs of C. All other decks: Metal, wood, plank, and cementitious flashings: The applicator is responsible for determining wood fiber shall be overlaid with poured in place the suitability of the substrate for the TIEMPO™+ 2000 structural or an approved lightweight concrete in good TPO membrane. The substrate shall be smooth and free condition. Some lightweight concrete products may not of sharp edges and other surface irregularities that be suitable. Contact DRS Technical Review Department prevent the flashing membrane from being 100% for acceptable products. adhered. D. Reroofing over existing roof: The specifier and/ or 3.02 Application Procedures applicator shall determine the condition of the existing roof. Significantly deteriorated decking must be repaired NOTE: For insulation application and suitability, refer to or replaced, as appropriate. Wet materials (containing Appendix 2-M, DRS Approved Insulation List & Fastening free moisture that would evaporate if exposed to Rates. atmosphere) must be found and replaced. Existing A. Insulation or protection board surface shall be dry, reasonably smooth and even, blisters cut, and loose aggregate removed prior to 1. Minimum thickness: Shall be approved in writing by installation of approved insulation board. DRS. Since the insulation requirement for thermal value will vary for each project, the thickness of the E. Vapor retarder: Is not required for protection of Dow insulation must be calculated for the desired results. Roofing System membrane. As a guideline, the National Roofing Conctactors Association (NRCA) states, 2. Compatibility: Certain polystyrene type insulations

are not compatible with coal tar pitch. Contact first seam of the day, first seam after the robot welder manufacturer for recommendations. (Reference has been allowed to cool down, and after any Appendix 2-M, Approved Insulation List & Fastening extreme changes in weather conditions. Cut edges Rates). shall be caulked by applying Dow 2000 Edge Sealant from a squeeze bottle. 3. Manufacturer’s instructions: In regard to compatibility and spanning of metal flutes, the 3. T-Seams manufacturer’s specifications shall determine the a. Definition: The point where two perpendicular lap suitability for an application, subject to acceptance by seams intersect is called a “T-seam” and if T- DRS. seams are not properly welded, a seam void may 4. Approved insulation: Approved insulation layer(s) result, which will require patching. lay be loose laid provided it is overlaid with a b. For 0.045-in. and 0.060-in. membrane, T-seams minimum 1/2-in. thick, moisture resistant gypsum should be properly creased in at the step-off area, insulation attachment, approved insulation layer(s) using a hand roller. For T-seam locations that shall be mechanically attached with DRS fasteners have not been welded properly, a patch is and approved insulation places (Reference Section required. Patches shall be a minimum of 4-in. in 2.03 D) or bonded to the structural concrete deck with diameter and can be either 0.045-in. reinforced DRS-supplied insulation adhesive. Boards should be TIEMPO™+ 2000 membrane or 0.060-in. butted as close as possible. Voids greater than 1/4-in. unsupported membrane or a Dow 2000 T-Joint shall be filled. Patch. B. Membrane installation c. For TIEMPO™+ TPO 0.080-in. thick membrane, a patch is required on all T-seam locations. 1. Air seal: The TIEMPO™+ 2000 TPO membrane shall be sealed and mechanically attached with 4. TIEMPO™+ 2000 TPO membrane, as with any appropriate DRS Fastener at all perimeters and material after exposure, will require cleaning prior to through-deck penetrations (Reference specific DRV seaming. The approved method for cleaning Air Seal Detail Drawings). TIEMPO™+ 2000 TPO membrane prior to welding is as follows: 2. At all perimeters that are to receive a gravel stop or metal edging after installing approved air seal, the a. Remove any visible dirt and debris with a clean TIEMPO™+ 2000 membrane must be brought over rag and water. For heavily contaminated surfaces, the outside edge and terminated 12-in. o.c. scrubbing with a detergent cleaner (i.e. Fantastik® (Reference specific DRV Detail Drawings). All field or 409®) followed by a water rinse may be areas of membrane must overlap adjacent sheet by necessary. minimum 2-in. and be hot-air welded as in section b. With a clean scrub pad saturated with Dow 2000 3.02.C. Membrane Cleaner, aggressively agitate the 3. DRS VRS Valves are to be installed as per DRS seaming area. With a clean white rag, follow with detail DRV-1 at pre-specified locations determined by a final one swipe pass over the seaming area, DRS Technical Review Department careful to not redeposit any contaminants back onto the cleansed sheet surface. C. Lap splice: Membrane shall be overlapped 2-in. and hot-air welded without any contaminants (adhesive, dirt, c. Allow Dow 2000 Membrane Cleaner to completely debris, etc.) in the seam. (Reference DR-600 Detail flash off (i.e. membrane should be completely Drawing). dry). d. Follow the standard welding procedures with an 1. Hot-air welding: An automatic hot-air welder and approximated 20% reduction in speed. hand-held welder which are functionally in top condition are required for DRS applications. Small e. Final weld strength may not be achieved for work and repairs can be done efficiently with the several days. hand-held welders; however, hand-held welders are not a recommended means of field seaming. D. Perimeter fastening: Wood nailers are required for perimeter gravel stops or drip edges and are 2. The entire lap edge must be probed: with approved independent of most air seal terminations. Membrane will seam probing tool (i.e. Sears cotter pin extractor) be fastened by use of specified DRS approved air seal after it has cooled completely to verify seam detail. consistency. Probing before the seam area has cooled will damage the membrane. In addition there 1. Wooden nailers: See 3.01.F. should be destructive tests performed daily on a 3-in. 2. Base of parapet or curb: Membrane must be wide area of seam weld to verify sufficient peel mechanically attached 6-in. o.c. with a DRS approved strength. A properly welded seam will have air seal detail to the deck at all perimeters and at all membrane delamination from scrim prior to weld through-deck penetrations. failure. Destructive test welds should be done for the

E. Flashing: Perimeters, curbs, vents, expansion joints, work, the membrane is extended beyond the insulation drains, and other details shall be flashed as shown in and set into the approved overnight seal material. standard DR and DRV Detail Drawings. Under no Roofing applicator shall coordinate installation to ensure condition shall flashings cover weep holes or any form of the system is made watertight at the end of each work through wall drainage. day. 1. Apply Dow 2000 Membrane Adhesive (Solvent H. Roof walkways: When regular roof traffic is indicated Based) or Dow 2000 Membrane Adhesive (Low VOC) (for example, to service rooftop units), TIEMPO™+ TPO to both underside of flashing membrane and surface Walkway Roll is recommended to be installed over the to which it is to be bonded, at a rate of approximately membrane. To install Dow 2000 Walkway Roll: one gallon per 60 square ft. when applied to two surfaces. Installation: For dirty and/or weathered membrane, start with #1 below. For NOTE: Dow 2000 Membrane adhesive (Solvent Based) or clean fresh membrane, start with #4 below. Dow 2000 Membrane adhesive (low VOC) shall not be applied to membrane surfaces that are to be hot-air welded. 1. TIEMPO™+ 2000 TPO membrane must be clean and Hot-air welding shall be used throughout the system where dry. Remove any visible dirt and debris with a clean TIEMPO™+ 2000 TPO membrane overlaps itself. rag and water. For a heavily contaminated surface, scrubbing with a detergent cleaner (i.e. Fantastik® or 2. Dow 2000 Membrane Adhesive (Solvent Based) or 409®) followed by a water rinse may be necessary. Dow 2000 Membrane Adhesive (Low VOC) shall be allowed to dry until tacky and until it does not string or 2. With a clean scrub pad saturated with Dow 2000 stick to a dry finger. Roll the flashing into the dry Membrane Cleaner, aggressively agitate the seaming adhesive. Care must be taken to assure that the area of the roof membrane surface. With a clean flashing does not bridge where there is any elevation white rag, follow with a final one-swipe pass being or directional change. Completely roll the flashing careful not to redeposit any contaminants back onto membrane against the substrate using a hand roller, the cleansed sheet surface. J-roller or similar device. Apply firm pressure to the 3. Allow Dow 2000 Membrane Cleaner to completely entire surface area. flash off (i.e. membrane should be completely dry). 3. All flashing shall be terminated as shown in DR Detail 4. Position walkway roll and cut to desired length. Drawings. Whenever possible, walkway shall not cover seams. 4. DRS Metal flashing at perimeter shall be made and When installed adjacent to a seam, the walkway installed as per standard DR Detail Drawings. should be kept a minimum of 2-in. from the edge of the seam on the bottom sheet of the completed lap 5. Pipe flashings shall be installed in accordance with and a minimum of 6-in. from the edge of the seam standard DR Detail Drawings. Remove existing when located on the top sheet of a completed lap. flashings and sleeves. Do not flash to lead. 6. Expansion joints shall be installed in accordance with When covering seams is unavoidable, the lap seam standard DR Detail Drawings. should be completed per DRS Specifications and thoroughly probed with any deficiencies repaired prior 7. Roof drains shall be installed in accordance with to walkway installation. standard DR Detail Drawings. In reroofing, old drains must be cleaned or replaced as needed for clamping In circumstances where drainage around the walkway detail. All bolts must be properly secured to supply is a concern, shorter walkway lengths spaced with a 100% continuous compression of the clamping ring. 2-in. gap may be desired. Remove old leads and packings. Field seams shall not be run through drains. Drain sleeves are not 5. Fully weld perimeter of walkway to the membranes covered under Warranty. However, a prefabricated following standard welding procedures. sleeve insert with clamping ring and backflow seal are acceptable. 3.03 Vented roof system variations for severe exposures. F. Metal work: Metal work other than Dow 2000 Edge Metal Systems are not covered by DRS Warranty. NOTE: For seacoast application, ASCE Exposure D, (See Table 2, ASCE Exposure Classification Chart) and 1. Metal work shall be installed in a manner that buildings with large wall openings such as hangar doors, prevents damage from buckling or wind. truck docks, or buildings with positive pressure, contact 2. All metal work must be sealed and waterproofed in an DRS Technical Review Department for suitability of specification. acceptable manner. G. Overnight seal/temporary water stop: Shall be made by a sealant method approved by DRS To protect the insulation from inclement weather at the end of a day’s

Table 1 - Physical Properties - TIEMPO™+ 2000 TPO Membrane

ASTM 6878 Typical Values Typical Values Physical Property Test Method Minimum 80 mil* 45 mil* (1.14 mm) 60 mil* (1.52 mm) (2.03 mm) MD 339.94 lbf. (1.5 kN), 325.83 lbf, (1.45 kN), 220 lbf, (0.98 kN) Breaking Strength ASTM D-751 XMD 335.73 lbf. (1.4 kN) 335.73 lbf, (1.5 kN) (Grab Method) ASTM D-751 MD 77.6 lbf. (0.35 kN), 89.8 lbf. (0.34 kN), 55 lbf. (0.25 kN) Tear Strength Procedure B, min. (8”x8” sample) XMD 163 lbf. (0.73 kN) 184.6 lbf. (0.82 kN) ASTM D-1149 (70 hrs. @ Ozone Resistance 0 Rating 0 Rating No visible cracks 100˚F/37.8˚C) Static D 5602 44 lbf. (20 kg) 44 lbf. (20 kg) Puncture Resistance N/A Dynamic D 5635 25 Joules 25 Joules Elongation at MD 34.29% 42.41% ASTM D-751 15% Reinforcement Break XMD 33.88% 34.93% Brittleness ASTM D-2137 @-49°F/-45°C Pass Pass Pass Water Apsorption ASTM D-6878 D-471, (max. % weight (158°F/70°C for 7 Days) ± 3.0% ± 3.0% ± 3.0% change) Testing only one side section Breaking MD 365.92 lbf. (1.63 kN) 328.14 lbf. (1.46 kN) 90 % Retention of Strength XMD 319.26 lbf. (1.42 kN) 334.16 lbf, (1.49 kN) Breaking Strength and Elongation at Elongation at Heating Age (D 751) MD 40.68% 39.10% Break Reinforcement (80 mil Test Method Break XMD 30.71% 35.14% D 573) 60.0% Retention of Tearing MD 150.30 lbf. (0.67 kN) 77.10 lbf. (0.34 kN) Tearing Strength at Break Strength XMD 203.75 lbf. (0.91 kN) 245.0 lbf. (1.09 kN) Weight Change < 0.1% < 0.1% ± 1.0% Linear Dimension ASTM D-1204 < 0.1% < 0.1% ± 1.0% Change (% max.) Solar Reflectance Greater than or ASTM C-1549 78.4% 80.78% (initial) Equal to 0.65 Greater than or Thermal Emittance ASTM C1371 0.88% 0.86% Equal to 0.75 * Thickness (nominal) per ASTM D-751 Test method. MD=Machine Direction XMD=Cross Machine Direction

Table 2 – ASCE Exposure Classification

ASCE Exposure Classification Defined American Society of Civil Engineers (ASCE) has defined the roughness of the terrain into four “ground roughness” categories, or “exposures”. Exposure A This classification applies to large city centers with at least 50 percent of the buildings having a height in excess of 70 ft. (21.3 m). Use of this exposure category shall be limited to those areas for which representative terrain prevails in the upwind direction for a distance of at least one-half mile (0.8 km) or 10 times the height of the building or structure, whichever is greater. Possible channeling effects or increased velocity pressures due to the building or structure being located in the wake of adjacent buildings shall be taken into account.

Exposure B Urban and suburban areas, wooded areas, or other terrain with numerous closely spaced obstructions having the size of a single-family dwelling or larger. Use of this exposure category shall be limited to those areas for which representative terrain prevails in the upwind direction for a distance of at least 1,500 ft. (460 m) or 10 times the height of the building or structure, whichever is greater.

Exposure C Open terrain with scattered obstructions having heights generally less than 30 ft. (9.1 m). This category includes flat, open country and grasslands.

Exposure D Flat, unobstructed areas exposed to wind flowing over open water for a distance of at least one mile (1.61 km). This exposure shall apply only to those buildings and other structures exposed to the wind coming from over the water. Exposure D extends inland from the shoreline a distance of 1,500 ft. (460 m) or 10 times the height of the building or structure, whichever is greater.

Appendix 1 (page 1 of 2)

DOW ROOFING SYSTEMS FASTENER SELECTION GUIDE TIEMPO™+ 2000 Product Line

PRODUCT DESCRIPTION PRODUCT DESCRIPTION PRODUCT DESCRIPTION PRODUCT DESCRIPTION Dow 2000 Fastener #14 Dow 2000 Fastener # 12 Dow 2000 Fastener #21 Dow 2000 Fastener #15 Dow 2000 Fastener #14 is Dow 2000 Fastener #12 is for Dow 2000 Fastener #21 is Dow 2000 Fastener #15 is for for insulation attachment. insulation attachment. Use for membrane attachment membrane attachment. Use Use with Dow 2000 with Dow 2000 Insulation featuring a drill point, and a with Dow 2000 Metal Seam Insulation Plate 3-inch (76.2- Plate 3-inch (76.2-mm). deep buttress single lead Plate 2 3/8-in (60- mm). mm). thread. Use with Dow 2000 Metal Seam Plate 3-in. (76.2-mm). SIZE AVAILABLE: SIZE AVAILABLE: SIZE AVAILABLE: SIZE AVAILABLE: 1½, 2, 3, 4, 5 - 8 -in. (38, 50, 1 5/8, 2¼, 2 7/8, 3¼, 3¾, 4½, 2 - 8-inch (50 - 200-mm) in 1¼, 2 - 9, 10, 12, 14 and 16 75, 100, 125 - 200 - mm) in (41, 57, 73, 85, 95, 114- mm) 1-inch (25-mm) increments -inch (30, 50 - 229, 250, 300, 1-inch (25-mm) increments 5 - 8-inch (125 - 200 -mm) in 355 and 406-mm) 1-inch (25- mm) increments DECK TYPE: DECK TYPE: DECK TYPE: DECK TYPE: Wood and 18 to 26 (0.30 - Wood and 18 to 26 (1.3 - FM approved minimum 22 18-12 (1.3 - 2.5-mm) gauge 0.55 mm) gauge steel. 0.55-mm) gauge steel gauge steel* [*Test drill to steel check for installability on 18 and 20 (1.3 - 2.5-mm) gauge steel decks prior to committing to a project]. PACKAGING: PACKAGING: PACKAGING: PACKAGING: 1¼ - 6 -inch (30 - 150- mm): 1 5/8 - 4½ and 5 - 8 inch (41 - 2 and 3-inch (50 and 75- 1¼ (30-mm) 2 -5 -inch (50- 1000/bucket 7, 8 - inch (175, 114 and 125-200 - mm): mm): 1000/bucket 4 - 6-inch 125mm): 1000/box 6, 7, 8 , 9, 200- mm): 500/bucket 1000/bucket (100 - 150-mm): 500/bucket 10, 12, 14-inch (150, 175, 7 and 8-inch (175 and 200- 200, 229, 250, 300, 355- mm): 250/bucket mm): 500/box and 16-inch (406-mm)250/box PRODUCT DESCRIPTION PRODUCT DESCRIPTION PRODUCT DESCRIPTION Dow 2000 Insulation Plate 3-in. Dow 2000 Metal Seam Plate 3-in. Dow 2000 Metal Seam Plate 2 3/8-in. Dow 2000 Insulation Plate 3-in. is a Dow 2000 Metal Seam Plate 3-in. for Dow 2000 Metal Seam Plate 2 3/8-in. Galvalume-coated, metal insulation membrane attachment. Use with a Dow (60 mm) features a patented “Eye Hook” plate for use with Dow 2000 Insulation 2000 Fastener #21. design. Can be used with Dow 2000 Fastener #12, Dow 2000 Fastener #14 Fastener #15 or the Dow 2000 Concrete or Dow 2000 Concrete Deck Fastener. Fastener. SIZE AVAILABLE: SIZE AVAILABLE: SIZE AVAILABLE: 3-inch (76-mm) diameter 3-inch (76-mm) diameter 2 3/8-inch (60-mm) diameter PACKAGING PACKAGING PACKAGING 1,000/box 500/bucket 1,000/bucket

Appendix 1 (page 2 of 2)

DOW ROOFING SYSTEMS FASTENER SELECTION GUIDE TIEMPO™+ 2000 Product Line

PRODUCT DESCRIPTION PRODUCT DESCRIPTION Dow 2000 Dow 2000 Insulation Fastener (PIF) Fastener #15 Dow 2000 Preassembled Insulation Fastener (PIF) is for Dow 2000 Preassembled Fastener #15 is for membrane insulation attachment and it is comprised of a #12 fastener attachment and is comprised of a Dow 2000 Fastener #15 with a 3-inch (75-mm) polymer locking plate. and a Dow 2000 Metal Seam Plate 2 3/8-in. SIZE AVAILABLE: SIZE AVAILABLE: 2¼, 2 7/8, 3, 3¼, 4 - 10 -inch (57, 73, 76, 83, 102 – 254 mm) in 2 - 8-inch (50 - 200 mm) in 1-inch (25 mm) increments 1-inch (25 mm) increments DECK TYPE: DECK TYPE: Wood and 18 to 26 (1.3 - 0.55 -mm) gauge steel. Structural concrete (pre-drilling required), wood and 18 to 26 gauge (1.3 - 0.55-mm) steel. PACKAGING: PACKAGING: 2¼ - 8-inch (57 - 200-mm): 500/box 2-inch (50 mm): 500/box 9, 10-inch (229- 254-mm): 250/box 3 - 8-inch (76 - 200-mm): 250/box PRODUCT DESCRIPTION PRODUCT DESCRIPTION PRODUCT DESCRIPTION Dow 2000 Aluminum Dow 2000 Concrete Fastener Dow 2000 Masonry Anchor Termination Bar Non-threaded hammer-in fastener for Hammer-in-type expansion fastener for Aluminum bar for use in membrane membrane and insulation attachment. securing termination bar. termination. Refer to specific DRS details. SIZE AVAILABLE: SIZE AVAILABLE: SIZE AVAILABLE: 2¼, 2 7/8, 3¼, 3 ¾ -inch (57, 73, 83, 1/4-inch (6-mm) diameter x 1-inch (25-mm) wide, 10-ft. (3-m) long 95mm), 1¼-inch (30-mm) length 6-inch (150-mm) o/c slotted, punched 4 - 10-inch (100-250-mm) in 1-inch (25- mm) increments DECK TYPE: FOR USE IN: FOR USE IN: Structural concrete Concrete and masonry Membrane Terminations PACKAGING PACKAGING PACKAGING 2¼ - 8-inch (57 - 200-mm): 500/box 1,000/box 500-ft. (152-m)/tube 9, 10-inch (228,254 -mm): 250/box 50 pcs,10-ft. (3-m) long

Appendix 2-M (page 1 of 2)

Approved Insulation List and Fastening Rates for Mechanically Attached, Ballasted and VRS Systems

Introduction

This is a listing of insulation and cover board products acceptable for use with DRS Mechanically Attached, Ballasted and VRS Roofing Systems. Each listing shows specific manufacturer and product names, indicates which products are approved for retrofit applications and which are eligible for DRS warranty coverage. In addition, fastening recommendations for each product type are shown. Please note the variations in required insulation pre-securement and/or cover board requirements as it relates to insulation type and thickness. Note: It is not within the scope of this chart to provide information relating to building code compliance, or specific Factory Mutual Global (FMG) or Underwriters Laboratories, Inc. (UL) approvals. FMG, UL and/or building code requirements for insulation type, thermal barrier requirements, minimum/maximum insulation thickness and product pre-securement rates may differ from the DRS requirements shown herein. Refer to the current edition of the FMG Approval Guide, the UL Roofing Materials and Systems Directory and/or the UL Fire Resistance Directory for complete information, or contact the DRS Technical Review Department DRS recommends that the building Department be consulted to ensure compliance with local requirements.

General Recommendations

1. Refer to the product manufacturer’s literature to confirm minimum allowable thickness required to span steel deck flutes, etc. 2. Adjacent insulation/cover boards shall be installed as closely as possible with no gaps or offsets greater than 1/4 inch. 3. Since many insulation systems provide taper to 1/2 inch thickness only, a tapered edging of DRS-approved insulation is recommended to be installed at all such transitions. 4. Approved insulation products shall be installed with the longest dimension of the board perpendicular to the direction of mechanically secured membrane lap seams whenever possible. Insulation end joints shall be staggered. 5. Insulation pre-securement fasteners/plates shall be installed at the rates shown herein and located on each board as shown in DRS Detail Drawing DR-622. 6. For applicable substrates (structural concrete, gypsum, cementitious woodfiber) DRS permits insulation boards to be adhered using a DRS-supplied insulation adhesive or hot steep asphalt (ASTM D312, type III and IV). The insulation manufacturer, adhesive manufacturer and DRS Technical Services must specifically approve such applications. When using insulation adhesives/asphalt to secure insulation, the insulation board size can not exceed 4-ft. X 4-ft. 7. Consult the DRS Technical Review Department at (877)788-8324 if the insulation manufacturer’s current installation/securement instructions conflict with information published herein.

Rev: 091509

Appendix 2-M (page 2 of 2)

Approved Insulation List and Fastening Rates for Mechanically Attached, Ballasted and VRS Systems

Approved for Approved for Approved TIEMPO™+ 2000 Insulation Approved Retrofit DRS Product TPO Type Manufacturers Applications “Total System” Warranty Yes 4 per 4’ x 8’ bd. The STYROFOAM™ Extruded (See Note 1) 4 per 2’ x 8’ bd. Dow Chemical Yes Polystyrene RECOVERMATE™ CR Recover Only Company 15 per 4’ x 50’ area (XPS) (fanfold) (See Note 1) Georgia-Pacific 1/4” DensDeck® (See Note 3) Yes 5 per 4’ x 8’ bd. Corp. 1/2” DensDeck® Yes Gypsum-Board 1/4” Securock® (See Note 3) USG Corp. Yes 5 per 4’ x 8’ bd. 1/2” Securock® Yes TERMICO™ Polyisocyanurate Dow 5 per 4’ x 8’ bd. Yes Yes Polyisocyanurate Roofing Systems TERMICO™ Iso 3000 4 per 4’ x 4’ bd. TERMICO™ HP-FR Georgia-Pacific High Density Roof Fiberboard Corp. High Density 6 per 4’ x 8’ bd. Wood Fiberboard IKO Sheathing / N/A N/A Roofboard Panels 4 per 4’ x 4’ bd. FiberBase® Temple-Inland HD1, HD6 Overlayment Type VIII (1.25 pcf) Required Yes (See Note 2) (See Note 1) Expanded Premier Industries Type VIII (1.25 pcf) with Yes 6 per 4’ x 8’ bd. Polystyrene (Insulfoam) “Secure-Ply” overlay (EPS) Type II (1.50 pcf) 6 per 4’ x 8’ bd. Recover Only R-TECH (fanfold) 1/2-in., (See Note 1) 15 per 4’ x 50’ area Type VIII (1.25 pcf)

NOTES: 1. A separation sheet/layer may be required when using a polystyrene product directly over coal tar pitch B.U.R. roof systems. Consult the insulation manufacturer for specific requirements. 2. Due to the lower compressive strength of Type VIII (1.25 pcf nominal density) expanded polystyrene (EPS), DRS requires this product to be overlaid with an approved polyisocyanurate insulation or cover board (i.e. DensDeck® or Securock® for Mechanically Attached, Fully Adhered, GardenTopTM and some VRS Roofing Systems. Type I (1.0 pcf nominal density) EPS is acceptable for use under stone/paver ballasted systems only. 3. This product is not approved as a recovery layer directly over gravel-surfaced B.U.R. roof systems. It is approved for use over existing single-ply and smooth or mineral surfaced roof systems.

Rev: 091509

®DensDeck is a registered trademark of Georgia-Pacific. ®Securock is a registered trademark of USG Corporation. ®FiberBase is a registered trademark of Temple-Inland.

®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. T2000 VRS 09.09. 12