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Old 11-21-2017, 08:25 AM   #1
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Insulation for Dryer Exhaust Piping


First time home owner here,

Yesterday, while running the dryer, I noticed water dripping from the dryer exhaust piping in the basement. It is getting cold outside and my basement is not heated. My guess is that the hot air is condensing in the pipe (which runs through the basement false ceiling) and does not make it out of the side of the house in time.

After I removed the ceiling tiles I noticed that someone tried to patch up all the exhaust pipe connections with duct tape. Something tells me duct tape is not going to hold water....

I am guessing I need to insulate this exhaust duct for the dryer. Just wanted to make sure with you guys that I am thinking the right way. If yes, what kind of insulation do I need? This is probably a 3-4" diameter exhaust pipe.
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Old 11-21-2017, 08:33 AM   #2
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Re: Insulation for Dryer Exhaust Piping


If I wanted to tape it, I would use the metallic foil tape doing the seams and joints.

You may be able to find a 4" duct sleeve else use fiberglass.

I personally would probably run PVC pipe for the duct and slope it to the outside.
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Old 11-21-2017, 10:51 AM   #3
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Re: Insulation for Dryer Exhaust Piping


Hmm.. I did not think about that - replacing with PVC. As I said, i am not experienced at this, but couple of google searches got some articles not recommending using PVC. Main points where heat damage over the years and static build up that attracts lint to the sides of the pipe.

Link to the video about PVC i watched:

I will check out to see if there any appropriately sized insulation sleeves i can buy.

Last edited by StudFinder; 11-21-2017 at 10:56 AM.
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Old 11-21-2017, 06:39 PM   #4
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Re: Insulation for Dryer Exhaust Piping


A filter installed in the dryer as factory recommended would have solved most of their pvc pipe lint problems.

Last edited by SeniorSitizen; 11-21-2017 at 06:50 PM.
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dryer , duct , insulation


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