Condensation in the attic is a direct result of warm humid air finding its way into the attic and then freezing in our extremely cold weather.
Dryer vent attic condensation.
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.
Because the dryer vent s air seal to the outdoors cannot be made between the heated space and the unheated space the second floor ceiling natural convection in the ductwork when the dryer is not running may still convey enough water vapor to the attic ductwork to cause condensation.
The water also condenses and runs back to the dryer creating a puddle underneath.
The attic is usually colder than the rest of the house during the winter and that can create a problem for a dryer vent.
In this quick video i show you what to look for if you have condensation build up in your attic.
Some areas have laws restricting dryer vents to be hooked up through an attic as it increases the chances of a fire.
A blocked vent is a common cause for dryer vent leaks.
Against an outside wall.
As the hot moist air hits the metal walls of the vent it condenses on the cooler metal and can leak through the pipe to damage the walls or ceiling.
This creates a blockage in the pipe blocking the flow of air.
When metal vent pipes aren t insulated the ambient air cools the metal which condenses the moist air inside the pipe this condensation can leak through the joints in the pipe and collect in the walls or ceiling or the water can run all the way back to the dryer and show up as a puddle under the unit.
When venting dryers for long distances use rigid metal pipe with as few elbows as possible.
Dryer vent hose often is not insulated.
The longer the cold snap the more opportunity the moisture has to accumulate into frost.
However this connection is sometimes the only option in older homes.
The hot moist air that is exhausted by the dryer has nowhere to go.
Another common problem with vent pipes is condensation.
Stray lint and fabric may accumulate in the vent over time.
I now have to vacuum out the dryer vent sometimes weekly to remove the condensation as enough of it forms that it blocks the dryer from venting from the amount of water in the pipe.
This can lead to problems.
Check all possible entry points for water leaking from outsi.
Bathroom fans dryer vents kitchen hood fans or other exhaust fans venting into the attic or not connected.
As a result it could condense and result in a water leak.
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