You may have to cut through drywall to fully expose the pipe and be able to apply insulation.
Insulating dryer vent in attic.
Doing so would fill your attic with warm moist air that could rot the framing.
Secure the insulation with hvac duct tape.
Attach insulation with foil based duct tape and caulk where pipe exits the house.
This reduces the chance of the water condensing inside your house or dryer vent.
Not all dryers will allow for this so be sure to check the owners manual to ensure it can be vented in this manner.
So the air remains warm until it exits the house.
Track the exhaust pipe from your dryer until it leaves the house.
Sometimes such as in town homes or condos it s not possible to vent a dryer through a wall outside.
Be careful you don t cut through any studs electrical wires or pipes in the process.
Cover the pipe in two to three inches of fiberglass insulation.
Step 1 wrap pipe in insulation.
If venting outside isn t an option you can vent the dryer out of the attic through the roof using a special roof vent to keep rain out.
The international residential code allows you to run a dryer vent through the attic but you can t terminate it there.
Wrapping the vent pipe with insulation is a good idea.
Leaks and what to do about them every inch of the metal surface of the dryer vent must be protected in order for the insulation to do its job.
A dryer vent should be vented outside.
Either way insulation is a necessary step when installing or repairing the dryer vent pipe particularly if it passes through a basement or crawl space.
The more insulation you install the less likely you are to have condensation in the ductwork.
When venting dryers for long distances use rigid metal pipe with as few elbows as possible.