Air Duct Repair

Yes, flexible ductwork can benefit from repairs. Add a hanger strap next to the slipping connection to fix the loose collar on the flexible duct and release any tension. Add more hanging straps all the way along the duct run. Using pliers or wire cutters, cut the duct strap. Remove the insulation from the connection by pulling it. To ensure that the insulation is properly covered, adjust the outer liner. On the butt edge of the outer layer, apply mastic. When the mastic has sealed the connection, slide the connection together and mash the materials together; then, secure it with a duct strap. Apply mastic to the joint's exterior.

A slightly different process is used for sheet metal ducting. The hanging straps or brackets on either side of the repair area should first be loosened. To inspect the leaking joint, sufficiently lower the duct. This kind of leak typically only requires additional sealant, but large gaps should be fully exposed and examined. Take the joint apart and reconnect it properly if the large gap was caused by a missing or improperly installed S-lock.

Yes, in some circumstances it is possible. For this process, the hole does indeed need to be smaller. Your ductwork's entire perimeter should first be thoroughly cleaned with soapy water, followed by a thorough rinse and complete drying. After that, you can use Underwriters Laboratory (UL) 181 foil-backed tape to seal the duct hole. High temperatures can be tolerated when using this tape. Any tape that has not been authorized for use on ductwork presents a risk of fire and smoke.

The amount of time needed to fix a leaky air duct depends on how accessible it is, how much damage it has, and how difficult the repair is. Small leaks can be fixed quickly in a few hours, while major ducting replacements or repairs can take a day or more. HVAC specialists assess the problem, determine the best course of action, and project the repair time based on the particulars of the ducting problem.

While minor air duct repairs like sealing small leaks with duct tape or mastic sealant can be done by homeowners, most air duct repairs should be handled by a professional. Issues like damaged or disconnected ducts, poor airflow, or extensive leaks require expertise to ensure proper repair. A professional can also inspect for underlying problems like mold, pest infestation, or improper insulation. Attempting complex repairs yourself may lead to inefficiency, poor indoor air quality, or further damage to your HVAC system.