How To Install A Bathroom Exhaust Fan Roof Vent

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

How to install a bathroom exhaust fan roof vent.

For optimum performance locate it between the shower and the toilet. If you vent through the roof condensation will drip back into the interior. Most bath vents for homes are 3. Climb into the attic and clear away any insulation from around the hole.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. From inside the attic drive a nail through the roof directly above the bathroom vent fan.

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

Avoid venting through a soffit vent or ridge vent. Here is the link to th. Next make sure it is securely fastened on both ends of the pipe. In order to accomplish this the roof has to have a hole cut in it.

The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. It is because of this that many builders tend to advise against this method. 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. I recommend replacing the vent pipe with insulated vent pipe.

Center the nail between two rafters. I see many questions about leaking bath exhaust vents. If you have access to the attic the fan can vent either through a gable wall or roof. 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.

Apply a bead of asphalt roof cement on the bottom of the vent. The lower half of the flange sits on top of the shingles. Slide the vent under the shingles so they cover the top half of the vent flange. Next make sure you have one of the new roof exhaust vents on the roof and properly sealed.