How To Properly Vent A Bathroom Fan Through The Roof

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.

How to properly vent a bathroom fan through the roof.

Recently i started having water drippage through the bathroom fan. The roof contractor recommends the soffit to minimize protrusions through the roof. This involves running ductwork from the fan usually though an attic and out through 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.

Bend over the tabs then nail the tabs to the roof. 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. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Then drill a hole on the roof top.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. The 2nd bathroom vent drips on the floor and is ruining the ceiling. I have gotten mixed opinions on whether to vent the new fan through the roof or through the soffit eave.

Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. I had a two bathroom renovation about one year ago. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. 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. 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. 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. Pass the opposite end of the duct through the hole in roof.

Next use aviation snips to cut slits into the sheet metal sleeve. 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. Run a thick bead of tri polymer sealant along the underside of vent hood. 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.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Take the end of the duct with the connector fitting and attach it to bath vent fan.