How to Install a Roof Dryer Vent


Hooking up a dryer duct system in an interior part of a home can require the user to route the duct system through the ceiling and roof. This method will discharge the hot air through a specially designed exhaust pipe that is manufactured to integrate with the roof's shingles and help prevent any leaks into the roof or attic. The duct system is constructed of aluminum to provide durability and withstand the dryer's heat.

Things You'll Need

  • 1 90 degree aluminum dryer duct elbow
  • 1 box of dryer duct clamps
  • Screwdriver
  • Section of aluminum dryer duct (number needed pending height of ceiling/roof)
  • Pencil
  • Level
  • Reciprocating saw
  • Measuring tape
  • Tin snips
  • Dryer duct roof mount kit
  • Hammer
  • 1 box roofing nails
  • 1 tube roof sealant caulk
  • Slide one end of the elbow over the dryer's exhaust vent on the back of the dryer. Position the other end of the elbow so that it points to the ceiling. Wrap a hose clamp around the connection and tighten with a screwdriver.

  • Position the dryer in its typical operating location. Hold a section of the duct lined up with the end of elbow, with the other end touching the ceiling. Use the level to make sure it is perfectly straight up and down. Trace the location of the pipe on the ceiling.

  • Cut a hole in the ceiling, using the saw, along the trace that is just a large enough for the duct to slide through.

  • Measure and cut a section of duct pipe that is long enough to extend into the ceiling about 2 feet while connected to the elbow. Slide one end of this pipe into the hole in the ceiling and then slide the other end down on the remaining end of the elbow. Use a clamp to secure the duct to the elbow and tighten it down.

  • Measure up (from inside the attic) from the end of the duct pipe to the roof, and mark the roof. Measure up directly over the duct so the hole in the roof will line up over the aluminum duct pipe. Cut a 4 inch hole in the roof, using the saw.

  • Slide the roof vent (from onto the roof) down through the drilled hole. As you slide the short end of the duct pipe on the bottom of the roof vent through the hole, slide the flashing on the sides of the vent underneath the shingles that are on the top side of the vent (closest to the peak of the roof).

  • Hammer a roofing nail through the shingles and flashing and into the roof to secure it. Apply the roof caulk around the shingles and flashing to provide additional sealing and help prevent any moisture from leaking into the attic.

  • Measure (from inside the attic) the distance from the duct pipe coming up from the ceiling and the bottom of the duct pipe on the roof vent. Cut a piece of duct pipe to fit and slide it onto each end, and secure each end with a tightened hose clamp.

  • Turn the dryer on and test the air flow through the aluminum duct system.

Tips & Warnings

  • Maintaining a clean and lint-free dryer duct system will help keep your dyer operating at its highest efficiency.
  • Use caution when operating the power saw.
  • Never leave a running dryer unattended.

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