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JM EPDM Installation GuideAdhesive UseAll membranes and substrates to be adhered must beapproved by Johns Manville. Both surfaces must be clean,smooth, dry, compatible and free of contaminants and grease/oil. All fasteners, if required, must be properly seated andplates flush, leaving an acceptable surface to receive adhesive.JM EPDMUnroll the membrane and allow it to relax at least 30 minutesbefore applying adhesive, longer time is necessary in colderweather.Key:WB - Water-BasedSB - Solvent-BasedN/A - Not ApplicablePosition the membrane with an overlap appropriate for widthof seam type being used. Fold membrane back one-half of thelength of the first sheet’s length to expose its bottom side.Make sure adhesive container is sealed. Turn upside-downand wait a minimum of five minutes. Turn containers rightside up. Carefully open and vigorously stir until adhesive is auniform color and all solids are dispersed, with – NO SWIRLS.Saturate roller by dipping into can. Roll adhesive onto substrate and membrane for smooth-backed membranes.For solvent-based adhesives, the appearance of a spider webeffect will occur with stringers off the roller when the rollerneeds to be redipped into the adhesive. It will also be hard topush the roller.When adhesive is ready, carefully roll the membrane into thesubstrate, avoiding wrinkles. Apply even pressure with a lawnor linoleum roller (minimum 75 lb [34 kg]) to ensure good contact between the membrane and substrate.Do not apply adhesive in the seam area; seams are to remainclean and dry. Avoid puddling of adhesive. With adhesives,more is not necessarily better. “Over-coating” adhesives willlead to poor adhesion.Do not use in direct contact with polystyrene foam.Adhesive coverage, open time and dry time rates can varydramatically depending on the particular substrate and environmental conditions. Coverage rate charts, stated herein, areapproximate only. If FM Global or UL approval is required,please consult the specific RoofNavSM or UL CertificationDirectory for specific application rates.ENRGY 3 Dens Deck WB/SBWood FiberInvinsa N/AWB/SBWB/SBWB/SBWB/SBGypsum FiberRoof BoardConcreteN/ASECUROCK LightweightConcreteSubstrate for Adhered MembraneNotes: Water-Based Adhesive: Use the two-sidedcontact application method for all smooth-backedsingle ply membranes. DensDeck: Priming of the board is required. Not suitable for SECUROCK Glass-Mat roofboards.Solvent and Low-VOC/Solvent-Based, Two-Sided Applicationfor Plain-Backed (Smooth-Backed) MembraneApply solvent-based adhesive in a smooth, even, thin coat toboth membrane and approved substrate at the rates listed onspecific product data sheets. Most applications apply approximately half the listed rate to the membrane and the other halfto the substrate. For porous substrates such as wood and gypsum, apply more adhesive on the substrate.EPDM systems require adhesive to become tacky to the touchon both surfaces without stringers. Time will vary dependingon the ambient temperature and humidity.Water-Based, Two-Sided Application for Plain-Backed(Smooth-Backed) Membranes OnlyApply water-based adhesive in a smooth, even, thin coat toboth the membrane and approved substrate at the rates listedon specific product data sheets. Most applications applyapproximately half the listed rate to the membrane and theother half to the substrate. For porous substrates such aswood and gypsum, apply more adhesive on the substrate.Adhesive should be tacky at point of assembly; approximatetime will vary depending on the environmental conditions.Once the adhesive begins to change color (from white toclear) and feels tacky, but with no stringers (just like the solvent adhesive), carefully roll the membrane to the substrate.Avoid capturing air or creating wrinkles during this process. Ifadhesive is completely dry or too wet (still all white), adhesionwill be compromised.RS-3080 11-12 (New)

JM EPDM Installation GuideWater-Based Adhesive Cautions Water-based adhesives are white; if product appears tohave disappeared after application then adhesive is toodry and will need to be reapplied. Do not over apply. Use the coverage rate chart in thissection; too much adhesive will result in curing issues. Prior to application and curing, water-based adhesive canNEVER be exposed or stored to temperatures below 40 F.Do not apply when ambient temperatures are expected todrop below 40 F within 48 hours after application.Suggested Coverage Rate RangesFt2/gal (gal/sq)Solvent-Based )Insulation and 090(0.83)(0.91)(1.0)(1.11)Less Adhesive More AdhesiveLess Adhesive More AdhesiveInvinsaInvinsaSECUROCKSECUROCKGypsum FiberGypsumFiberRoof BoardRoof BoardDensDeckDensDeckPrimePrime ENRGY 3ENRGY 3 Wood FiberWood FiberDensDeckDensDeckNotes: Listed rates are for finished roofing areas. See JM requirements for correct application method. Two-Sided Application: Most applications apply approximately halfthe listed rate to the membrane and the other half to the substrate. Forporous substrates such as wood and gypsum, apply more adhesive onthe substrate.SurfacingsBallast SurfacingThe ballast should be of a suitable type, and of sufficientamount, to provide protection against wind uplift. Local windSuggestedCoverageRateconditions andcharacteristicsbe taken into accountSuggestedCoverageshouldRate RangesRanges2Ftwhen assessing the ballast requirements.The Single PlyFt2/gal/gal elinesto assist50SolventBasedor9080706050theSolvent Based or90807060LowVOC/SolventBased(1.43)(1.67) Single(2.0)designer,in its“Wind(1.11)Design(1.25)Guide 1.67)(2.0)Ply RoofingcanWaterBased13012011010090WaterBased Systems” (ANSI/SPRI130120 RP-4).110 Information10090(0.83)(0.91)(1.0)(1.11)also be obtained from(0.77)local buildingfrom (1.11)FM(0.77)(0.83) codes(0.91) and(1.0)Global Property Loss —PreventionData — Sheet1-29“Roof— DeckLessMoreAdhesive— —Less AdhesiveAdhesive — onents.”InvinsaInsulationandCoverInsulation and CoverBoardsBoardsSECUROCKSECUROCKGypsumGypsum FiberFiberRoofThe final decision on type andamount of ballast ultimatelyRoof BoardBoardDensDeckrests with the building owner DensDeckorPrimehis or her technical represenPrimelb/100 ft2tative, but should not be less than 10 ENRGYlb/ft2 (1,000ENRGY33Wood FiberFiberWood2[49 kg/m ). Note: This amount may not provide completeDensDeckcoverDensDeckage of the JM EPDM Single Ply Membrane.Notes:Notes: ListedListed ratesrates areare forfor fifinishednished roofiroofingng areas.areas. Two-SidedTwo-Sided Application:Application: ApplyApply half the rate to the membrane and theRS-3080 11-12 (New)otherotherhalfhalf toto thethe substrate.substrate. IfIf thethe rate is 1.0 gal/sq, 0.5 gal/sq goes onthethesubstratesubstrate andand thethe otherother 0.50.5 gal/sq goes on the membrane. Poroussubstratessubstrates willwill havehave moremore adhesiveadhesive on the substrate than the membrane.JM does not supply ballast materials; however, thefollowing materials are approved for use with ballastedSpecifications SE4B-(T), SE6B-(T), SE9B-(T), SE4RB-(T),SE6RB-(T) and SE9RB-(T):Nominal 1½" (3.81 cm) Aggregate: Clean, smooth river bottomstone consisting of ballast gradation Size #4 (or, alternatively,Size #3), as specified in ASTM D 448 “Standard Sizes of CoarseAggregate”. The ballast should consist of (#4) ¾" to 1½" (1.91 cmto 3.81 cm) or (#3) 1" to 2" (2.54 cm to 5.08 cm) washed river stonewith a minimum of 85% retained on a ¾" (1.91 cm) screen (#4) or 1"(2.54 cm) screen (#3).Nominal 2½" (6.35 cm) Aggregate: Clean, smooth river bottomstone consisting of ballast gradation Sizes #1 or #2 as specified in ASTM D 448 “Standard Sizes of Coarse Aggregate”. Itshould consist of 1½" to 3½" (3.81 cm to 8.89 cm) (#1) or 1½" to2½" (3.81 cm to 6.35 cm) (#2) washed river stone with a minimum of 85% retained on a 1½" (3.81 cm) screen.Pavers: Standard pavers (minimum 18 psf [88 kg/m2]), or interlocking lightweight pavers (minimum 10 psf [49 kg/m2), may besubstituted for nominal 1½" (3.81 cm) stone. Interlocking, lightweight pavers with documented or demonstrated equivalentwind performance data, or 22 psf (107 kg/m2) standard pavers,may be substituted for nominal 2½" (6.35 cm) stone.When pavers are used as ballast, and these pavers do notincorporate integral drainage channels, the pavers must beplaced on supports or pedestals. These supports or pedestalscan either be commercially available products or 6" (15.24 cm)square pieces of JM EPDM Walkpad (to give an approximate½" [1.27 cm] air space). These supports should be locatedat the intersection of the corners of the paver blocks. Allfour corners of adjacent pavers should rest on the same 6"(15.24 cm) square piece of JM EPDM Walkpad or pedestal.The approximate ½" (1.27 cm) air space between the paversand the membrane will allow moisture vapor to vent to theatmosphere. When concrete pavers are not installed on pedestals or supports, one layer of JM Polyester Mat ProtectionMaterial or cured JM EPDM Membrane must be installedbetween the paver and the membrane.If crushed rock or ballast with sharp edges is used, a protective layer of JM Polyester Mat Protection Material or otherapproved protection material must be used under the ballast.Gravel ballast must be clean and free of excessive fines, toavoid clogging the drains.JM recommends that sufficient ballast be applied to the membrane surface as soon as areas are completed, to provideimmediate protection against wind uplift.

JM EPDM Installation GuideCoatingJM roofing systems do not require coating and must notbe coated with any material not approved by JM. Bituminousbased coatings will damage EPDM roofing system productsand cannot be safely used for either coating or repairingEPDM roofing systems.JM recommends using TopGard 4000 or TopGard 5000, a 100%acrylic elastomeric coating, for JM EPDM roofing membranesystems.TopGard Coatings ApplicationWhen applying TopGard 4000 or TopGard 5000, use a brush,roller or spray equipment. Make sure that all surfaces areclean, dry and free of any dirt, grease, oil or other debris thatmay interfere with proper adhesion.It is recommended that coating be applied in two coats. Thefirst coat should be completely dry (normally 4 to 12 hours)before applying the second coat.Temperatures must be 50ºF (10ºC) and rising during time ofapplication. Do not apply TopGard 4000 or TopGard 5000 within24 hours of anticipated rain, dew or freezing temperatures. Aswith any coating, cooler temperatures and high humidity willslow the cure time.Membrane ApplicationIt is essential that JM products be correctly installed in orderfor the completed roofing system to perform properly. Thefollowing procedures are to be used in performing the variousoperations in installing roofing products:Positioning the Roofing MembranePosition the roll at the approximate application point, andunroll. If the membrane is wider than 10' (3.05 m), unfold themembrane to its fullest width. Move the membrane into placewithout stretching. The unfolding and movement of the membrane can be aided by waving the sheet in such a way asto pump a cushion of air under the sheet, creating a floatingeffect which simplifies movement of the sheet over thesubstrate.Allow a minimum of 30 minutes before fastening or splicing sothat the membrane can relax and release any tension inducedby packaging and handling. Visually inspect the membrane forany flaws or damage that would interfere with the acceptableapplication or performance of the membrane. Creases fromthe fold points can be very stubborn to flatten out, especiallyin cooler temperatures. These creases can create a problemin making the seam. The addition of heat to the area with anelectric heat gun, BEFORE APPLYING THE SEAM TAPE, willhelp relax the sheet to a flat condition.Apply the adjoining sheets in the same manner, lappingthe edges a minimum of 3" (7.62 cm). Consult JM TechnicalServices for lap width requirements for guarantees 20 yearsor longer. Sheets should be laid out in an offset pattern, witha minimum of 3' (91.44 cm) between adjacent end laps. Lapsshould be constructed with the upslope sheet overlappingthe adjoining sheet in a shingle manner to avoid any lapsopposing natural drainage.Perimeter attachment of the roofing membrane at theperimeter and at penetrations can be accomplished by eithermechanical fastening (using anchor discs or High Load plates)or adhesive fastening (using reinforced termination strips orRTS with Tape).Mechanically Fastened PerimeterFasten the EPDM membrane to the structural deck usinganchor discs or High Load plates 12" (30.48 cm) o.c. maximum,with appropriate fasteners.Adhesive Fastened PerimeterAdhere the EPDM membrane to the JM ReinforcedTermination Strip (RTS) with Tape using JM EPDM TapePrimer which is fastened 12" (30.48 cm) o.c. maximum, usinganchor discs or High Load plates with appropriate fasteners.NOTE: Do not use JM EPDM Bonding Cement to attach theEPDM sheet to the RTS.When possible, begin the installation at the highest point ofthe project area, working to the lowest point. Making sure allthe laps are shingled and do not buck water.RS-3080 11-12 (New)

JM EPDM Installation GuideTape Products ApplicationNote: Surfaces to be spliced must be cleaned and primedprior to the application of seam tape. Store seam tapes andpeel and stick products in the shade when rooftop temperature exceed 75 F (24 C).Position the top sheet to overlap the bottom sheet by aminimum of 3" (7.62 cm) at all locations for a 3" seam tape or aminimum of 6" (15.24 cm) for 6" seam tape, as indicated by thedotted sheet line. Sheets must be allowed to relax and musthave no fishmouths or wrinkles along the lap edge. Remove alldirt, oil, water and other contaminants from the surfaces to bejoined. Mark the position of the lap edge on the bottom sheetwith a pencil, crayon or marker.JM EPDM Tape PrimerThoroughly mix the JM EPDM Tape Primer prior to applicationto suspend solids contained in the mixture. Periodically stirduring use (every 5 to 10 minutes) to keep the solids in suspension.Fold back the top sheet, exposing the surfaces to be cleaned.Use JM EPDM Tape Primer to thoroughly clean talc, dirt, etc.,from the surface of both sheets in the area to be joined. Usinga scrubbing pad, apply JM EPDM Tape Primer to the cleanedarea at the rate of 350 to 400 ft2/gal (8.6 to 9.8 m2/l). Apply JMEPDM Tape Primer past the marked area and allow to dry thoroughly prior to application of tape products. Do not diluteJM EPDM Tape Primer.Turn the scrubbing pads frequently and change them often toensure that the release agent and dirt are completely removedfrom the sheet. Particular attention should be given to cleaning the factory splices in the membrane, since release agenttends to accumulate in this area during the manufacturingprocess. Scrub the JM EPDM Tape Primer into the factorysplice in the direction of the factory splice to remove therelease agent.JM EPDM Splice CleanerJM EPDM Splice Cleaner is an organic solvent mixturedesigned as a cleaning agent. Use to thoroughly clean dirtfrom JM EPDM membranes prior to applying primers or spliceadhesives if needed.RS-3080 11-12 (New)The splice area must be completely free of all dust and talcand surfaces must be maintained free from moisture, oil andother foreign contaminants until the splice has been completed. Areas with heavy accumulations of dirt or other contaminants should be washed with warm water and a low sudsingsoap and allowed to completely dry before using JM EPDMTape Primer.Seam TapeUnroll approximately an 18" (45.72 cm) length of tape and applyto the splice area, aligning the edge of the release paper withthe tape marks on the bottom sheet. Continue unrolling 18"(45.72 cm) lengths of the JM EPDM Seam Tape and securingeach segment in place along the entire length of the seam. Takecare to continue aligning the edge of the release paper withinthe marks on the bottom sheet. With the release paper still inplace, roll the entire length of the seam with a 2" (5.08 cm) widesilicone rubber roller to ensure good contact of the JM EPDMSeam Tape with the bottom sheet. Avoid excessive rolling pressure that could stretch or deform the JM EPDM Seam Tape.Fold the top sheet back over the JM EPDM Seam Tape withthe release paper still in place. Starting at one end of thesplice, remove the release paper from the JM EPDM SeamTape by peeling it back parallel to the roof surface and awayfrom the splice at a 45 angle. The top sheet should fall freelyonto the exposed JM EPDM Seam Tape surface, leaving 1 8" to1 4" (3.18 mm to 6.35 mm) of JM EPDM Seam Tape exposed.To ensure proper lap adhesion, roll with a 2" (5.08 cm) widesilicone rubber hand roller, first perpendicular to the outeredge of the splice on a diagonal, and then along the length ofthe splice.JM EPDM Seam Tape may be overlapped to form a continuous tape surface. Overlaps must be a minimum of 2" (5.08 cm).

JM EPDM Installation GuideMembrane end laps should be completed prior to making sidelaps. Special precautions must be taken at sheet end laps inorder to minimize the impact of t-joints created with the sidelap of the adjacent sheet.Tape ReleasePaperSide LapJM EPDMSeam Tape1½" (3.81 cm)Min.JM EPDM Tape Primer/WashEnd LapWhen the entire t-joint has been fabricated, roll the area carefully to ensure that the JM EPDM Seam Tape is forced into themembrane edges and corners.All t-joints in cured sheets must be covered with a patch thatextends a minimum of 3" (7.62 cm) beyond all seam edges. Itis acceptable to use uncured JM EPDM Peel & Stick Flashingproducts of the appropriate size.See Detail EL-14T-A in the Flashing Details Section for a drawing that illustrates this installation.JM EPDM Peel & Stick FlashingClean and prime the area to be flashed with JM EPDM TapePrimer, or other approved cleaning method, as described inthe “Tape Products Application” section, to remove the talcand any dirt from the sheet, and to prime the surface for thetape application.Unroll a manageable length of JM EPDM Peel & Stick Flashingand cut to length with scissors. Peel the release paper off theJM EPDM Peel & Stick Flashing. In certain details, i.e., corners, be sure to use the JM EPDM Peel & Stick Inside/OutsideCorners with a split-back release film to prevent the flashingfrom sticking to itself. Press the exposed tape area firmly intoplace in the area to be flashed. Be careful to apply the JMEPDM Peel & Stick Flashing without over-stretching the material. Apply pressure to the installed flashing with a 2" (5.08 cm)wide silicone roller, first diagonally to the edge of the sheet,and then along the entire length of the flashing, to ensureproper adhesion.Adjacent sheets of peel-and-stick flashing products must belapped a minimum of 3" (7.62 cm) and primed with Tape Primer.Stitch the material tight in areas where the sheet makeselevation changes. Care should be taken during rolling toavoid scoring, gouging or thinning the product.JM EPDM Peel & Stick T-Joint PatchesAll t-joints in cured sheets and butt joints in field seams mustbe covered by a patch that extends a minimum of 3" (7.62 cm)beyond all seam edges. It is acceptable to use any uncured JMEPDM Peel & Stick Flashing product of the appropriate size.The sheets are cleaned and primed as described previously.Remove the release paper and center the JM EPDM Peel &Stick Patch over the butt joint or t-joint and press it into place.Apply pressure to the installed patch with a 2" (5.08 cm) widesilicone roller to ensure proper adhesion. See flashing detailEL-14T for an illustration of a t-joint.JM EPDM Reinforced Termination Strip (RTS)JM EPDM RTS has splice tape pre-applied along one edgeof 6" (15.24 cm) reinforced JM EPDM Membrane. JM EPDMRTS with Tape can be installed horizontally or vertically in theangle change with the pre-applied tape facing up and towardthe field of the roof. See detail EB-2T or EB-3T.Position seam fastening plates 1 8" (3.18 cm) to 1" (2.54 cm)from the angle change. 12" (30.48 cm) o.c. maximum spacingis required. Secure with an approved fastener. Do not fastenplates over the top of release film, as this will cause film totear when removed. Roll the field membrane onto the exposedtape and apply hand pressure to the splice area.RS-3080 11-12 (New)

JM EPDM Installation GuideApplication of Wat

installing Johns Manville (JM) EPDM roofing systems and has been prepared for: The Roofing Mechanic JM recognizes that the success and long-term performance of our roofing systems depends upon the personal skill, experience and knowledge of the roofing mechanic. JM EPDM roofing systems offer important advantages for roofing crews.