How To Properly Vent A Bathroom Fan Through The Roof

I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave.

How to properly vent a bathroom fan through the roof.

It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. Pass the opposite end of the duct through the hole in roof. I had a two bathroom renovation about one year ago. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Then drill a hole on the roof top. 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. Bend over the tabs then nail the tabs to the roof.

If you have a home that was roofed before 2006 there is a good chance that one or more of your bathroom exhaust fans aren t doing their job properly if they re vented through the roof. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. The roof contractor recommends the soffit to minimize protrusions through the roof. Next use aviation snips to cut slits into the sheet metal sleeve.

When i investigated it i discovered that the bathroom one fan duct was just left hanging in the attic without connecting it to vent and the second bathroom fan did not even have a duct there was just direct venting in the. Take the end of the duct with the connector fitting and attach it to bath vent fan. 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. See below for a shopping list and tools subscribe.

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. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. I start every home inspection by giving myself a quick tour of the inside of the house to get an idea of what i need to be looking for while inspecting the exterior. Run a thick bead of tri polymer sealant along the underside of vent hood.

Recently i started having water drippage through the bathroom fan. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. 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. I am getting a new roof installed and tear off and likely a lot of plywood and am simultaneously getting a new bath vent fan.