So the air remains warm until it exits the house.
Insulating dryer vent in attic.
A dryer vent should be vented outside.
You can also install a vacuum seal that will prevent backdrafts of cold air when the dryer is off.
Not all dryers will allow for this so be sure to check the owners manual to ensure it can be vented in this manner.
Your dryer exhaust may be set in a sheet of metal or plywood.
When venting dryers for long distances use rigid metal pipe with as few elbows as possible.
In these cases it may be necessary to vent your dryer through the attic.
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.
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.
In some cases only a swinging metal flapper separates interior from exterior.
The international residential code allows you to run a dryer vent through the attic but you can t terminate it there.
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.
Attach insulation with foil based duct tape and caulk where pipe exits the house.
Improve the heat efficiency of your dryer vent by sealing around it with caulking or foam insulation.
Wrapping the vent pipe with insulation is a good idea.
This reduces the chance of the water condensing inside your house or dryer vent.