TinnerFlow™1st YearGREEN · Field ReferenceOvertight Flex Band Clamp
A clamp should secure flex, not slice the jacket. Back off the tension, patch torn vapor barrier, and verify the connection is tight without crushing or cutting the flex.
You use a mechanical tension gun to cinch down a stainless steel worm-gear clamp over a flexible duct branch connection, but you set the tool torque too high, slicing straight through the outer plastic vapor barrier jacket.
A clamp should secure flex, not slice the jacket. Back off the tension, patch torn vapor barrier, and verify the connection is tight without crushing or cutting the flex. The likely recovery is to check the condition, correct prep/setup if it is within your assignment, and bring the foreman clean information before the work creates rework overhead.
Do not crank the tension gun until it cuts into the flex jacket.
A torn vapor barrier can cause condensation, insulation failure, and callbacks.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.