TinnerFlow™Roof Curbs, Louvers & Exterior Air
RTU curbs, curb adapters, louvers, outside-air intakes, goosenecks, roof openings, flashing, rain, and bird screens.
Roof Curbs, Louvers & Exterior Air questions
How do I square up and level a roof curb on a pitched roof?3rd Year · Check firstWhat's the difference between a canted curb and a flat curb?3rd Year · Check firstHow do I install a pitch pocket for refrigerant lines penetrating the roof deck?3rd Year · Check firstHow do I run exposed roof ductwork so it meets wind-load requirements?3rd Year · Check firstWhat's the procedure for installing a gooseneck (hood) for an outside air intake?3rd Year · Stop / VerifyHow do I seal the duct drop inside a roof curb so water can't get into the building?3rd Year · Check firstWhere do I place the vibration isolators on a custom curb?3rd Year · Check firstWhat is a "doghouse" on a roof, and how do I flash duct penetrating the side of it?3rd Year · Check firstWhat is the mechanical code rule regarding the minimum outside air intake distance from a plumbing vent?4th Year · Stop / VerifyHow do I calculate the free area of a louver to ensure I meet the engineer's specs?4th Year · Stop / VerifyThe roof structure sagged, and my duct is now hitting the ceiling grid. How do I re-engineer the run on the fly?4th Year · Stop / VerifyWhy is water getting under a rooftop curb counter-flashing?3rd Year · Stop / VerifyHow can you tell if an exterior intake louver is installed the wrong way?2nd Year · Stop / VerifyHow should inactive sections of a louver be blanked off?2nd Year · Check firstWhat happens if an outside-air intake louver is covered from behind?2nd Year · Stop and Get DirectionWhy does an uninsulated louver blank-off panel sweat in cold weather?3rd Year · Check firstWhy would rain leak through the center joint of a multi-section louver?3rd Year · Check firstWhy is an upside-down exterior louver such a big problem?2nd Year · Stop / get directionWhy can blocking the back of a fresh-air intake louver starve the system?2nd Year · Stop / get directionWhy does an uninsulated louver blank-off panel sweat?3rd Year · Check firstWhy can an out-of-square opening jam louver blades?2nd Year · Check firstWhy is reverse-lapped louver flashing a serious water problem?3rd Year · Stop / get directionWhy does louver perimeter sealant split when backer rod is skipped?2nd Year · Check firstWhy can caulking louver weep holes cause water to back up inside?2nd Year · Check firstWhy are trim flanges not enough to anchor a large exterior louver?3rd Year · Stop / get directionWhy do multi-section louvers need room for thermal movement?3rd Year · Check firstWhy does silicone on the outside not fix a leaking louver splice?3rd Year · Check firstWhy does a metal-to-metal duct connection at a louver sleeve whistle?2nd Year · Standard CorrectionWhy does a bent louver actuator crank arm lock the blades?3rd Year · Check firstWhy does over-tightening a ceiling filter louver frame lock the hinge door?2nd Year · Standard CorrectionWhy can a normal transfer louver fail an architectural light-leak check?3rd Year · Standard CorrectionWhy does a large exterior louver bank need a sill pan flashing?3rd Year · Stop / get directionWhy can the wrong louver type pull rain into a high-velocity intake?4th Year · Check firstHow can a clogged louver bird screen collapse an intake louver?4th Year · Stop / get directionWhy can rain ruin lined acoustic duct before it is installed?1st Year · Stop / get direction