TinnerFlow™Duct Assembly, Seams & Joints
TDC/TDF, S-cleats, drives, Pittsburgh seams, slip joints, gaskets, flanges, and duct assembly checks.
Duct Assembly, Seams & Joints questions
What's the right torque or feel for tightening bolts on a TDC/TDF connection?1st Year · Stop / VerifyHow do I tell the difference between a Pittsburgh seam and a snap-lock seam?1st Year · Check firstHow do you properly bend and install a slip and drive (S&D) connection?1st Year · Stop / VerifyWhich way does the "drive" face on a vertical drop?1st Year · Check firstHow do I install TDC/TDF corners without smashing them or bending the flange?1st Year · Check firstDo I put the butyl gasket tape on the inside or outside of the bolt holes on a TDC flange?1st Year · Check firstHow far apart should the cleats be on a TDC/TDF transverse joint?1st Year · Check firstWhat's the proper way to cross-brake a piece of flat metal in the field?1st Year · Check firstDo I need to seal the longitudinal seams, or just the transverse joints?1st Year · Check firstHow do I fix a whistling TDC/Ductmate flange on a large duct?2nd Year · Standard CorrectionHow do I close a blind S-cleat joint in a tight chase when I can’t reach the back?2nd Year · Check firstHow do I fix a Pittsburgh seam that was not knocked down and is leaking?1st Year · Standard CorrectionHow do I fix a screaming TDC/Ductmate gasket leak?2nd Year · Standard CorrectionHow do I fix a stripped TDC or Ductmate corner bolt?2nd Year · Standard CorrectionHow do you line up twisted companion flanges without damaging the duct?2nd Year · Standard CorrectionWhy can a wide TDC or TDF joint leak in the center even when the corners are bolted?2nd Year · Standard CorrectionCan hold-down clamps on a trapeze cause duct leaks?2nd Year · Standard CorrectionWhy did the gasket get shaved off a spiral slip joint?3rd Year · Check firstWhy did the flat-oval longitudinal seam open on warm air discharge?3rd Year · Check firstWhy do TDC flanges bind on a tight back-to-back 45-degree offset?2nd Year · Standard CorrectionWhy does a drive cleat pop off a tight 45-degree elbow throat?2nd Year · Standard CorrectionWhy does a half-peened Pittsburgh seam leak?1st Year · Field ReferenceWhy do round slip joints need uniform crimps?1st Year · Field ReferenceWhy do large TDC/TDF joints need center flange clips?1st Year · Field ReferenceHow do I avoid the sliding notch lock-seamer slip?1st Year · Coordinate before final work