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.

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. The 2nd bathroom vent drips on the floor and is ruining the ceiling. Bath exhaust fans routed up through the roof.

Choosing a whole house fan. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. 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.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. Apply roofing adhesive on the underside of the flanges to seal. Slide the vent under the shingles so they cover the top half of the vent flange. 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.

From inside the attic drive a nail through the roof directly above the bathroom vent fan. 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. A single exhaust exits through the roof figure a. Draw a mark on the bathroom ceiling where you d like to install the vent fan.

Climb into the attic and clear away any insulation from around the hole. Secure the vent flanges with roofing nails before installing the shingles. This discussion is now found at bathroom vent up through roof. 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.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Nail the lower corners with roofing nails and tar the heads. For optimum performance locate it between the shower and the toilet.

The lower half of the flange sits on top of the shingles.