Nail the lower corners with roofing nails and tar the heads.
Install bathroom ventilation through roof.
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.
You mount a switch in each bathroom.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
The lower half of the flange sits on top of the shingles.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
Bath exhaust fans routed up through the roof.
Center the nail between two rafters.
Secure the vent flanges with roofing nails before installing the shingles.
From inside the attic drive a nail through the roof directly above the bathroom vent fan.
The master bathroom and the 2nd bathroom vent through the roof and through the same opening.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.
Slide the vent under the shingles so they cover the top half of the vent flange.
This discussion is now found at bathroom vent up through roof.
The 2nd bathroom vent drips on the floor and is ruining the ceiling.
For optimum performance locate it between the shower and the toilet.
Apply roofing adhesive on the underside of the flanges to seal.
Climb into the attic and clear away any insulation from around the hole.
Any person competent in installing an outside vent either thru the roof soffit or gable hip end of the house thru the siding.
A single exhaust exits through the roof figure a.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
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.
Choosing a whole house fan.
This system is quiet too.
Apply a bead of asphalt roof cement on the bottom of the vent.