Install Bathroom Ventilation Through Roof

From inside the attic drive a nail through the roof directly above the bathroom vent fan.

Install bathroom ventilation through roof.

Each bath fan should be on a separate 4 or larger duct and the outside vent portion must have a baffle damper to prevent anything from coming into the duct work. Apply a bead of asphalt roof cement on the bottom of the vent. Center the nail between two rafters. 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.

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. Climb into the attic and clear away any insulation from around the hole. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. 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. A single exhaust exits through the roof figure a. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. Any person competent in installing an outside vent either thru the roof soffit or gable hip end of the house thru the siding.

A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. Choosing a whole house fan. You mount a switch in each bathroom. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Bath exhaust fans routed up through the roof. For optimum performance locate it between the shower and the toilet. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.

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. This discussion is now found at bathroom vent up through roof. Secure the vent flanges with roofing nails before installing the shingles. The lower half of the flange sits on top of the shingles.

The 2nd bathroom vent drips on the floor and is ruining the ceiling.