NERI TORCH TRAINING PART VII PRACTICAL EXAM PREPARATION

NERI TORCH TRAININGPART VII

PRACTICAL EXAM PREPARATION

• Each student must successfully pass the hands-on skills demonstration, which involves:

• 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:

• 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 sheetLifts corners using trowel and flops into placePresses target patch firmly into placeLaps checked with towel for proper sealFlame is never directed at drain or used to reheat sheet once flopped in place

#4 Installing a Roll Over a Pipe VentThermal 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 sealFlame 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 substratePre-cut sheets are dry fit and flanges cutFlips sheet over exposing bottom of membraneEvenly applied heat to back of membrane without burning sheetLifts corners using trowel and flops membrane around curb and presses into placeLaps checked with towel for proper sealFlame 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 cutSwitches to small detail torch (less than 105,000 BTU’s)Evenly applied heat to membrane without burning sheetLifts corners using trowel and presses into placeLaps checked with towel for proper sealFlame 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