Venting Clothes Dryer Into Roof

When bath fans and clothes dryers vent through the roof they melt a bunch of snow.

Venting clothes dryer into roof.

It is not advisable to vent a dryer through the roof. Every turn increases friction loss unless you use non restrictive elbows. The international residential code allows you to run a dryer vent through the attic but you can t terminate it there. Venting the dryer outside in cold weather wastes a lot of heat.

But we don t recommend it for two reasons. Doing so would fill your attic with warm moist air that could rot the framing. After the snow melts below the vent it ll probably freeze again farther down on the roof. For dryer efficiency and safety the shortest and straightest ducting route is always best.

This is one of the most common mistakes we see from people who are not experienced with air ducts. 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. Dryer vent specialists will tell you that a vertical approach to installing a dryer vent is inefficient and creates a fire risk for a home if it goes unchecked. Be careful you don t cut through any studs electrical wires or pipes in the process.