How To Vent A Bath Fan Through The Roof This Old House

From inside the attic drive a nail through the roof directly above the bathroom vent fan.

How to vent a bath fan through the roof this old house.

Do not vent through a soffit. Center the nail between two rafters. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. This will serve as a reference point for positioning the wall cap.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening. If you vent through the roof condensation will drip back into the interior. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The 2nd bathroom vent drips on the floor and is ruining the ceiling.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Here this old house general contractor tom silva shows the proper way to install a bath vent fan. In this video this old house general contractor tom silva explains how to vent a bathroom fan. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

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. From the roof find the nail and use the utility knife to cut roof shingles from. Drive nail through house wall from attic. From outside use 4 inch hole saw to cut hole for wall cap.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. This involves running ductwork from the fan usually though an attic and out through the roof. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. If that s not possible go through the roof.

I recommend that my clients vent their bath fans out a gable wall if at all possible when not using an hrv or erv that is. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Other venting options includes running the duct up through the roof or down through the soffit. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

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.