How To Install A Bathroom Exhaust Fan Roof Vent

Apply a bead of asphalt roof cement on the bottom of the vent.

How to install a bathroom exhaust fan roof vent.

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. Most bath vents for homes are 3. I see many questions about leaking bath exhaust vents. From inside the attic drive a nail through the roof directly above the bathroom vent fan.

In order to accomplish this the roof has to have a hole cut in it. Avoid venting through a soffit vent or ridge vent. Learn the secrets to running anew exhaust line through the outside wall install a fan and connect the ducting and electrical. Climb into the attic and clear away any insulation from around the hole.

For optimum performance locate it between the shower and the toilet. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. Next make sure it is securely fastened on both ends of the pipe. Next make sure you have one of the new roof exhaust vents on the roof and properly sealed.

Center the nail between two rafters. I recommend replacing the vent pipe with insulated vent pipe. Here is the link to th. Slide the vent under the shingles so they cover the top half of the vent flange.

If you have access to the attic the fan can vent either through a gable wall or roof. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. This involves running ductwork from the fan usually though an attic and out through the roof. Nail the lower corners with roofing nails and tar the heads.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The lower half of the flange sits on top of the shingles. Install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. Apply roofing adhesive on the underside of the flanges to seal.

It is because of this that many builders tend to advise against this method. 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. Secure the vent flanges with roofing nails before installing the shingles. If you vent through the roof condensation will drip back into the interior.