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

In this video this old house general contractor tom silva explains how to vent a bathroom fan.

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

If that s not possible go through the roof. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. Other venting options includes running the duct up through the roof or down through the soffit. 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.

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. 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. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. If you vent through the roof condensation will drip back into the interior. From inside the attic drive a nail through the roof directly above the bathroom vent fan. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Center the nail between two rafters. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

Do not vent through a soffit. Drive nail through house wall from attic. This involves running ductwork from the fan usually though an attic and out through the roof. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

This will serve as a reference point for positioning the wall cap. From outside use 4 inch hole saw to cut hole for wall cap. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

Here this old house general contractor tom silva shows the proper way to install a bath vent fan.