Install Bathroom Ventilation Through Roof

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.

Install bathroom ventilation through roof.

The lower half of the flange sits on top of the shingles. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Apply a bead of asphalt roof cement on the bottom of the vent. Any person competent in installing an outside vent either thru the roof soffit or gable hip end of the house thru the siding.

You mount a switch in each bathroom. Nail the lower corners with roofing nails and tar the heads. 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. Slide the vent under the shingles so they cover the top half of the vent flange.

Bath exhaust fans routed up through the roof. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Choosing a whole house fan. This system is quiet too.

From inside the attic drive a nail through the roof directly above the bathroom vent fan. I prefer to run a bath vent to outdoors via a horizontal line that goes across an attic and out through a gable end wall or one that vents down and outside through a roof overhang or soffit. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.

A single exhaust exits through the roof figure a. Climb into the attic and clear away any insulation from around the hole. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Apply roofing adhesive on the underside of the flanges to seal.

Install the roof vent install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. Draw a mark on the bathroom ceiling where you d like to install the vent fan. Center the nail between two rafters. The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

For optimum performance locate it between the shower and the toilet.