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- � / SBS Heat-Weld Specifications �� 2FID MA/HW,12" in lap �,r�►� Two Ply Mechanicall� Attached and Heat Weleded Modi�ied Bitumen Mineral Surfaced Roo#ing S�em For use over �D°'°"B �— Johns Mamille (JM) insulation or approved decks on ° � i inclines up to G' per foot (3U0 miNml. "�� —�- �� Malerials per 100 sq. ff. (9.3 mz) af roof area �,�� %� e��a , . in HeaRWeWed Lap :�MaWeW CaP Ri �: ' Dynalastic 180 S t layer --- � Cap: s- �o - . DynaWeld Cap FR 1 ►ayer w�� - - - - - � PoN Sheet 4• �P Approximate installed weight 190-2101bs. (86-95 kgs.) o • . ' r 1 Heec weiaee - i General 5' � 4' EiN Lep .....� . 0 — — — — — . HeatYYelded � This specification is for use over an approved steel deck which is not 1s[agge�eti6� min.) �_ nailable and which provides a suitable surface to receive the roof. �nsne�-isans• . .-, . Insulation should be installed in accordance with the appropriate ' �' ._-► JM Insulation Specification detailed in the JM IndustriaUCommerical �pD-MA/HW,12' in lap ��rs Roofing Salutions Manual. This specification can also be used in certain reroofing situations. Refer to the "Reroofing° section of the JM Industrial/ Commerical Roofing Solutions Manual. Cap Shest Application Design and installation of the deck and/or wbs�a�e must rewlt in the Neat weld a full width piece of the cap sheet over the installed base sheet. roof draining fresl� and to outlets aumerous enough and m locatsd as Subsequent sheets are to be applied in the same manner, with 4' (102 mm) to remove water pron�dy and comple»IY. Areas wMsre waler ponds for side laps and 4' (102 mm) end laps over the preceding sheet more ffian 24 hours are wia�ble aad are not eligible to receieve a John Mamille Roofi�g Srstems Guarantee. Apply all sheets so that they are firmly and unifortnly set, without voids. using a prapane torch, apply the flame to the surface of the coiled portion Note: All general iostructions contained in the current JM Industrial/ of the roll. Torch across the full width of the roll and along the lap area. Commerical Roofing Manual should be considered part of this As the surface is heated, it will develop a sheen and the bum-off will specification. disappeac The generation of smoke is an indication thatthe material is being overheated. Repeatthe operation with subsequent ralls, maintaining Flashings proper side and end laps. A healthy compound flow will simplify seaming Flashing details can be found in the "Bituminous Flashings" section of the the laps. JM tndustriallCommerical Roofing Manual. At the end laps, soften the bitumen by heating the granule surface with the torch. When the granules start to sink irtto the bitumen, stop torching and Application with a hot trowel, embed the granules into ihe bitumen. All laps must be On roof decks with slopes up to 1 Y4' per foot (125 mm/m►, the modified checked for good adhesion. bitumen sheets may be installed either perpendicular or parallel to the roof �r special precautions for heat weld applicafions, see sec6on 1A.31 of incline. the JM IndustriaUCommerical Roofing Manual Base PIy Application Starting atthe low point of the roof, fasten a half width, 19'/,a" (0.5 m►, piece of the base sheet The remaining piles are to be applied full ��_(( width, with 51127 mm) side and 6' (153 mm) end laps over the preceding sheets. ��/w�� 1��. �_..._— Sheets should be fastened 17 (306 mm) an center in the side lap with ��pHYRH�i_�-� JM-approved plates and fasteners for this system. The 5' (127 mm) side � Q � lap of the subsequerrt (tap) base sheet should coverthe head of the p �AN� �XAMIN�� N�� fastener in the preceding (bottom) base sheet Heat weld the side and end laps. Using a propane torch, apply the flame to the surface of the lap only of ffie coiled portion of ffie top sheet as it is laid out Torch across the lap portion only of the roll. The generation of smoke is an indication that the material is being overheated. Subsequent sheets are to be applied in the same manner, with 51127 mm) � V�1't�' a � . ' = � side laps and 6' 1153 mm) end laps over the preceding sheets. SxA�L. �-�� j�LDIN� ALLw�� •t}�FS,�L�;4�IL�' AN� PREVA�' . . ��,E�`T'ZiC �ODE CODE �NAT Ic � ;v. � .L = � LS URI�II�AI��ES CITY OF Z��"�� Refer to the Material Safety Data Sheet and product label prior ta using this product RS-4210 5-101Replaces 3-07)