NERI TORCH TRAINING
PART VII
PRACTICAL EXAM
PREPARATION
• Each student must successfully pass the
hands-on skills demonstration, which
involves:
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Pre-job planning
Proper torch assembly
Safe work practices
Shutting down a torch
Fire Watch
Students shall work in pairs to
complete seven hands-on exercises:
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Pre-Job Planning
Starting a new roll at a wall using torch
and flop
Install a target patch using torch and
flop
Install a roll over a pipe vent using
torch & flop
Flash a curb using torch and flop
Flash a curb using small detail torch
Shut down torch properly
Hands-on Exercises
#1 Pre-Job Planning
ASSEMBLY REVIEW
1. Connect regulator to hose;
2. Connect regulator to cylinder;
3. Release a small amount of gas to remove any debris that may
have been accumulating in the hose while in storage;
4. Attach the hose to the torch head;
5. With torch head closed, crack valve on cylinder to permit a
small amount of pressure to build up in hose;
6. Using soap/water solution, check all connections for bubbles
which would indicate a leak is present;
7. Close the valve on the cylinder before retightening all of the
connections.
#2 Starting a New Roll at the Wall
Thermal barrier is present ( ¾” Perlite, ¾” Fiberglass or ¼”
Gypsum Board)
Back rolls membrane 6 feet away from edge and positions in
place
Evenly applied heat to back of membrane without burning sheet
Lifts corners using trowel and flops into place
Sheet is stepped or broomed into place
Laps checked with towel for proper seal
Flame is never directed at wall penetrations or substrate or used
to reheat sheet
#3 Installing a Target Patch Over Drain
Thermal barrier is present ( ¾” Perlite, ¾” Fiberglass or ¼”
Gypsum Board)
Places pre-measured target patch over non-combustible
substrate, away from drain
Pre-cuts fingers (if applicable)
Evenly applied heat to back of membrane without burning sheet
Lifts corners using trowel and flops into place
Presses target patch firmly into place
Laps checked with towel for proper seal
Flame is never directed at drain or used to reheat sheet once
flopped in place
#4 Installing a Roll Over a Pipe Vent
Thermal barrier is present ( ¾” Perlite, ¾”
Fiberglass or ¼” Gypsum Board)
Stops advancing roll prior to reaching vent
pipe
Dry measures vent pipe location – -cuts
membrane out of sheet
Flips sheet over exposing bottom of
membrane
Evenly applied heat to back of membrane
without burning sheet
Lifts corners using trowel and flops
membrane around pipe and presses into
place
Laps checked with towel for proper seal
Flame is never directed at vent pipe or
used to reheat sheet once flopped in place
#5 Flashing Around a Curb – Torch and
Flop
Base ply mechanically fastened to substrate
Pre-cut sheets are dry fit and flanges cut
Flips sheet over exposing bottom of membrane
Evenly applied heat to back of membrane without burning sheet
Lifts corners using trowel and flops membrane around curb and
presses into place
Laps checked with towel for proper seal
Flame is never directed at penetration / cant strip or used to reheat
sheet once flopped in place
#6 Flashing Around a Curb – Small Detail
Torch
Thermal barrier is present (one layer of peel
& stick modified sheet with air
impermeable laps.)
Pre-cut sheets are dry fit and flanges cut
Switches to small detail torch (less than
105,000 BTU’s)
Evenly applied heat to membrane without
burning sheet
Lifts corners using trowel and presses into
place
Laps checked with towel for proper seal
Flame is never directed at penetration /
cant strip or used to reheat sheet once
flopped in place
#7 Shutting Down the Torch
PROCEED OUTSIDE FOR
PRACTICAL EXAMINATION