How To Install A Bath Fan Roof Vent

It is because of this that many builders tend to advise against this method.

How to install a bath fan roof vent.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. The lower half of the flange sits on top of the shingles. 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 inside the attic drive a nail through the roof directly above the bathroom vent fan. For optimum performance locate it between the shower and the toilet. Center the nail between two rafters. Slide the vent under the shingles so they cover the top half of the vent flange.

Draw a mark on the bathroom ceiling where you d like to install the vent fan. Here is the link to th. Apply a bead of asphalt roof cement on the bottom of the vent. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

In order to accomplish this the roof has to have a hole cut in it. Install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. Learn the secrets to running anew exhaust line through the outside wall install a fan and connect the ducting and electrical. 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.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening. Use rigid metal ducting aluminum or galvanized steel with lengthwise seams facing up and joints sealed with foil tape or duct mastic or rigid plastic pipe. Nail the lower corners with roofing nails and tar the heads. Apply roofing adhesive on the underside of the flanges to seal.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. We explain how to install bathroom exhaust fans or vents the vent ducting the vent termination at the wall soffit or roof vent fan wiring bath vent duct insulation bath vent lengths clearances routing and we answer just about any other bathroom ventilation design or installation question you may have.