Relocating a dryer vent

by Ifi28035764

I own a townhouse. The dryer and vent is located on a interior wall. The vent makes the first 90 degree into the wall, a second 90 degree turn where the vent was run under the Master bedroom and a third 90 degree turn, where the vent exits, on grade. I discovered that because the dryer exits on grade, water was entering the system, making it impossible to dry clothes. I don’t know what to do because relocating the exit vent seems impossible because the only options appear to vent through the roof (I’m told this could lead to attic fires), or one 90 degree turn, exiting to the rear of the house however, venting this ways will certainly cause the air conditioner to suck in the lint from the dryer vent.


  4 answers
  • Tex11597626 Tex11597626 on Jul 22, 2018

    dryers will one or more bends will collect lint quickly. This will slow down the drying time of clothes. Venting thru the roof is generally acceptable. You need to keep combustible materials at least 2” away from pipe, this includes roof decking and use the proper roof vent. To clear lint from pipe, some people use a leaf blower to clear lint. The dryer has to be moved, this exposes the vent in the wall. The blower will clear the pipe in less than minute usually.

    • Ifi28035764 Ifi28035764 on Jul 22, 2018

      I bought the townhouse and this venting issue is something that wouldn’t have been practical to check prior to purchase.

      Even though I always removed lint from the dryer lint filter, I noticed that it was taking longer and longer to dry clothes. I discovered that the vent exhaust conduit, running under the Master bedroom, had water in it.

      Based on my choices, venting through the roof seems to be the best choice. However, I‘ve gotten mixed responses on going that route.

      Thanks for your input.

  • William William on Jul 22, 2018

    Every 90 degree elbow equals to 5' of straight run pipe. I'm surprised it vents properly. You would need to check with your association if you can change the venting. They may provide a solution. Another option would be to put in another elbow and length of pipe to vent above grade. Seal any openings with caulk and pipe joints with foil tape.

    • Ifi28035764 Ifi28035764 on Jul 22, 2018

      It doesn’t vent properly. I can wash but I am forced to use a commercial laundry to dry. I realize all of the 90 degree turns are a problem, that‘s why I need to reroute the vent with minimal turns. One turn, up, it vents through the ceiling. One turn to the back, vents over the AC unit, venting to the third exterior wall, vents to the front of the property, not acceptable.

      Thanks for for your reply! 👍🏻

  • William William on Jul 22, 2018

    I would vent through the roof, if allowed. Instead of an elbow where it turns up use a tee. Tie the dryer into the center tee connection with one end up and one end down. Cap off the turned down end. It will trap any lint that doesn't go up and out. A vent called a roof cap for dryer vents on top of the roof.

  • Tex11597626 Tex11597626 on Jul 22, 2018

    When clothes take longer to dry, it’s because of lint build up in vent. Try blowing lint out vent pipe and see if that makes a difference. The water in the vent may be condensation of warm moist air meeting cooler air. The exterior vent cap should keep rain water out, check that for damage. Dryers vented thru roof are common.