DIY Network

How to Fix AC and Dryer Pipe Leaks

Follow these instructions to seal off leaky AC and dryer vent pipes.

More in Windows Walls and Doors

  • Time


  • Price Range

    $100 - $250

  • Difficulty

    Moderate to Hard


Step 1: Saw the Drywall

Lay down a drop cloth and begin squaring off the hole in the ceiling using a drywall saw.

square off hole in ceiling

Step 2: Seal the Holes

Next, seal the holes in the vents with aluminum tape.

seal holes in vents with aluminum tape

Step 3: Redirect the Vents

Separate the AC and dryer vents as much as possible and secure them into place.

separate the AC and dryer vents

Step 4: Patch Up the Ceiling

Now you can patch up the hole in the ceiling. Begin by cleaning up the edges by removing any spare screws. Measure the drywall and cut it to size (Image 1). Screw the drywall in place (Image 2).

Step 5: Seal the Drywall

Apply the first layer of drywall mud to create a seal. Allow it to dry completely, sand it down, and repeat as needed. To complete the project, prime and paint the ceiling.

apply layer of drywall mud to create seal