When dryers are on interior walls with no direct route to the exterior, they can vent through the roof. Dryers venting through the roof need rigid metal ducting that extends straight to the roof exterior. Venting through the roof requires routine professional cleanings or risk lint build-up becoming a fire hazard.
Can a dryer vent go through the roof?
Dryer vents should always be vented through the side of the house and not vented through the roof, and ideally, the exit should be fairly close to the ground. Keeping a clean dryer vent is much easier when you can safely reach the exit. These terminals need to be cleaned on a regular basis to prevent lint buildup.
How high can a dryer vent go up?
The maximum developed length of a clothes dryer exhaust duct shall not exceed 35 feet from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet for each 45-degree (0.8 rad) bend, and 5 feet for each 90-degree (1.6 rad) bend.
Can a dryer vent go uphill?
The International Residential Code (IRC 2009) has no restrictions or requirements for clothes-dryer exhaust ducts to have any pitch, either up or down, although they are also required to conform to the “dryer manufacturer’s installation instructions”.
How do you run a dryer vent through the roof?
Connect the dryer to the roof vent with 4-inch metal duct pipe, cutting pipe as needed with tin snips and fitting it together with the necessary fittings. You may have to cut a hole in the ceiling over the dryer to run the duct through the attic.
Can you run a dryer vent through the attic?
The International Residential Code allows you to run a dryer vent through the attic, but you can’t terminate it there. Doing so would fill your attic with warm, moist air that could rot the framing and ruin the attic insulation, and lint from the dryer could create other problems.
Should dryer vent be insulated in attic?
If the duct is in a heated space, such as the inside of the house or in a finished basement, then no, it doesn’t need to be insulated. But if it’s running through a crawl space, unheated basement, attic or other unconditioned space where there’s the potential for freezing, then it does need to be insulated.
Is it better to vent a dryer up or down?
It’s fine for the dryer vent to rise vertically to enter the building ceiling, but within the ceiling the vent should slope downwards towards its exit point at the building exterior wall.
Why is my dryer vent on the roof?
First of all, the vent from the dryer is trying to push the lint up and out of the roof. It is a long way to travel out of the walls and once it does get out, it makes a mess on the roof, as shown in the video above. The vent is for use in bathrooms and other smaller areas of the house to let the air out, not lint.
Can you run a dryer vent up a wall?
Dryer vents should not be installed in ways that make them difficult to clean and inspect. Any vent in a wall cavity should be made of solid metal, with all joints sealed with metallic tape. There should not be any tight turns and they also need to be sized properly to the distance run.
Can dryer vent go vertical?
It’s OK to vent vertically up to the attic, as long as you are (as you plan to be) carrying on and venting to the outside. To determine whether your total length of vent and number of 90 degree turns is OK, you’ll need to consult your dryer’s owner’s manual for the data.
What is code for venting a dryer?
Dryer venting systems are covered in the International Residential Code (IRC) at M1502 – Clothes Dryer Exhaust.