I cut the duct too short — patch, sleeve, splice, or remake?
Apprentice Workflow, Mistakes & Recovery🛠️ MECHANICAL FIT CHECKyellow
📖 Verified core answer
Identify the connection type first, then choose the clean recovery: sleeve/coupling/splice/filler only when appropriate, remake when the connection cannot be recovered cleanly.
How short is the duct or piece, and is the gap small enough to bridge cleanly?
What connection is involved: S-and-drive, TDC/Ductmate, flex, round/spiral, or specialty duct?
Is the short end at a joint, fitting, wall/shaft opening, equipment, damper, exposed area, or inspected work?
Will the fix affect access, damper operation, insulation/vapor barrier, support, airflow, slope, finish appearance, or rated/life-safety work?
Is the clean recovery an approved sleeve/coupling/splice/filler, or does the piece need to be remade?
Ask foreman
Only ask after you have checked the connection type, measured the shortage, and identified whether it is hidden, exposed, rated, specialty, or inspected. Then ask with the likely recovery option ready.
ACheck the exact condition in the field before acting.
BHold the work clean and safe if the detail, scope, or approval is unclear.
CBring the foreman the location, what you checked, and what decision you need.
Do not do this
Do not stretch flex to cover it. Do not leave a gap and bury it with tape, mastic, insulation, ceiling tile, or paint. Do not force a TDC/flanged joint that will not seat. Do not add a random patch to rated, specialty, exposed, or inspected duct without approval.
Why this matters
A short cut can become an air leak, bad finish detail, failed inspection, blocked access issue, or repeated rework. The right recovery depends on the connection system, not just the fact that the duct is short.
TinnerFlow™