How To Vent A Bathroom Fan Through A Metal Roof

Bend over the tabs then nail the tabs to the roof.

How to vent a bathroom fan through a metal roof.

Pass the opposite end of the duct through the hole in roof. Take the end of the duct with the connector fitting and attach it to bath vent fan. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. However there are a few simple tips that will help make the process a little easier and also ensure that the vents are placed to allow the maximum benefit.

The 2nd bathroom vent drips on the floor and is ruining the ceiling. If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. I have the same situation a limited storage space above the ceiling which does not extend to the eaves so i must vent my bathroom exhaust fan up through my metal roof.

Installing some type of ventilation mechanism on a metal roof is not a lot different from the addition of vents to any type of roof. Use rigid metal ducting aluminum or galvanized steel with lengthwise seams facing up and joints sealed with foil tape or duct mastic or rigid plastic pipe. A 3 or 4 inch duct connects to the outlet on the fan housing and runs to a side wall or to the roof and connects to a vent cap that allows the. Since i do not want to pull up the metal roof i must cut a hole through it and the vent cap flashing will sit on top of the metal roof instead of underneath shingles.