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  • Shield air conditioning units and other protrusions with perlite or similar panels when using the torch around them. Heat roofing membrane away from air conditioning units, fans, soil pipes, and all other protrusions, and set in place while still hot. Use extreme caution to prevent the flame from being pulled into the building interior.

  • Feather seams around details with a warm trowel.

  • When torching at flashings, corners or voids in the roof or roof deck, never torch directly. Always torch the membrane to be applied and then adhere it to the corner or joint.

  • Use caution when torching near pipes in the event there is suction present. Failure to utilize base sheet as required by manufacturer specifications is extremely dangerous as the base sheet provides a protective covering for underlying combustibles.

  • Examine the roof substrate for any void, hole or gap and fill it with noncombustible or perlite cant strip. Cover the cant strip with CertainTeed Type G2 fiber glass base sheet.

  • Never torch directly to insulation. Appropriate CertainTeed base sheet is required over all insulations. RIC/TIMA recommends that polyurethane and polyisocyanurate insulations be isolated from the roof membrane via the use of an additional layer of noncombustible insulation and CertainTeed base sheet, or an interim base ply acceptable to the membrane manufacturer.

  • Install CertainTeed Type G2 fiber glass base sheet over all flammable surfaces and insulations. Base sheet must fit tightly around all deck openings and must turn up parapet walls so that torch flame cannot flash down into and start a fire underneath the deck.

  • Never torch into any area where you cannot see; do not use the torch in areas such as under air conditioning units or behind counterflashing.

  • Don’t torch directly to wood fiber cant strips or wood fiber insulations.

  • Don’t torch directly to any cant strip, insulation, wood or any other flammable surface.

  • Never torch near gas lines or electrical wires.

  • Never torch to flammable surfaces such as EPS insulations.

  • Never torch around flammable vents.

  • Do not point the torch under rooftop equipment.

  • Do not direct the torch down open roof penetrations, or near openings around roof penetrations.


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