How To Install A Bath Fan Roof Vent

The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

How to install a bath fan roof vent.

From the roof find the nail and use the utility knife to cut roof shingles from around the nail. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Slide the vent under the shingles so they cover the top half of the vent flange. 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.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. For optimum performance locate it between the shower and the toilet. 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. The lower half of the flange sits on top of the shingles.

In order to accomplish this the roof has to have a hole cut in it. From inside the attic drive a nail through the roof directly above the bathroom vent fan. It is because of this that many builders tend to advise against this method. 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.

Apply roofing adhesive on the underside of the flanges to seal. Here is the link to th. Apply a bead of asphalt roof cement on the bottom of the vent. Secure the vent flanges with roofing nails before installing the shingles.

Learn the secrets to running anew exhaust line through the outside wall install a fan and connect the ducting and electrical. Nail the lower corners with roofing nails and tar the heads. Draw a mark on the bathroom ceiling where you d like to install the vent fan. 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.

Center the nail between two rafters. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.