To install a roof vent start by choosing a good location from inside the attic and then pound a nail all the way through the roof at that location so you can find the spot from outside.
How to install a roof vent for bathroom fan.
Apply a bead of asphalt roof cement on the bottom of the vent.
How to install a bathroom fan vent in the soffit.
Idea 5 connecting the duct to the bathroom fan.
Slide the vent under the shingles so they cover the top half of the vent flange.
Nail the lower corners with roofing nails and tar the heads.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
From inside the attic drive a nail through the roof directly above the bathroom vent fan.
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Next we must slip a worm drive metal clamp on the inside part of duct liner.
Remove the tape from the fan first.
This way we can make sure both are positioned properly.
Check the damper and the screen in prior to installation.
The lower half of the flange sits on top of the shingles.
Choosing a whole house fan.
This video is a comprehensive rundown on how to install a roof vent on a pre existing shingle roof.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
For optimum performance locate it between the shower and the toilet.
Climb into the attic and clear away any insulation from around the hole.