section a min. of 2" past the line where the membrane counterflashing will end so as not to torch or mop directly to the deck.) Next, at the transition area, a min. 30" counterflashing strip of Flintlastic SBS modified bitumen cap sheet must be fully adhered. Position the counterflashing strip so that it extends 6" onto the exposed field membrane and a min. of 24" up the sloped section of roof (min. 6" beyond the turned up field membrane). Over the Flintlastic SBS modified bitumen flashing plies the CertainTeed No.15 Asphalt Felt or Roofers’ Select™ shingle underlayment is mechanically fastened, beginning 4" above the transition area. Next the shingle starter row and first course of shingles are installed, beginning 2" above the transition area.
Note: In regions where snowfall occurs, install CertainTeed WinterGuard™ or Black Diamond™ Base Sheet to the sloped section prior to installing the base sheet and roofing membrane. Contact CertainTeed for details.
Parapet Wall Noncombustible cant strip must be installed at the base of the parapet wall for SBS torch-applied systems. Appropriate CertainTeed base sheet and all field membrane plies must extend a min. of 2" beyond the top of the cant strip. For nailable walls, also install base sheet from the top of the cant strip to the outside edge of the parapet wall. Parapet wall flashing membrane (Flintlastic SBS modified bitumen) not exceeding roll width must extend to the outside edge of the parapet wall if coping is used, or a min. of 8" above the top of the cant strip if termination bar and counterflashing are installed, and 4" onto the field membrane.
Drains – SBS The CertainTeed base sheet should extend into the drain, set in hot asphalt or SBS modified bitumen flashing adhesive in a 9" area around the ring and
Drain detail, hot asphalt applications – part A