Extractor Fan Vented Through Roof

Kitchen range hood vented through roof.

Extractor fan vented through roof.

To avoid going through the brick wall can i vent the hood straight up through roof. This involves running ductwork from the fan usually though an attic and out through the roof. I have my fan vented out through the roof but near the inside of the roof in my attic the vent leaks a bit and condensation gets on the wood and a bit down in the insulation around where the vent goes out. Robert s has the largest base flange of any bath roof vent cap which makes it super easy to install and make watertight on the roof.

Two bathrooms two roof vents each bathroom has its own exhaust fan. In order to accomplish this the roof has to have a hole cut in it. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. No need for special tool.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. I have a range that is located against an outside brick wall in a one story kitchen with a flat roof.

I can feel some water around the metal wrapping of the vent where there is an opening. Each fan vents separately out the roof. Both bathrooms are vented by a single in line fan that has one exhaust vent running through the roof. A direct through wall bath vent fan design may be preferable if the building roof shape bath location or other details make it difficult to exhaust a ceiling mounted bathroom exhaust fan.

In other words some bathroom locations and designs such as first floor baths in a multi story home are vented out thorough the building sidewall not up.