Climb into the attic and clear away any insulation from around the hole.
How to install a bathroom roof vent.
Then drill a hole on the roof top.
Next hammer in a nail every few inches to secure the vent to your roofing structure.
The top half of vent flange needs to be covered.
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Nail the lower corners with roofing nails and tar the heads.
Simply slide the vent under shingles to do so.
Connect power to both switches through two pigtails spliced to the feed wire.
Slide the top and sides of your vent underneath the surrounding shingles and leave the bottom side of the vent exposed and laying over the shingles.
Turn your vent upside down and apply a thick bead of caulk to the flange.
On the bottom of the vent you need to spread some asphalt roof cement next.
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From inside the attic drive a nail through the roof directly above the bathroom vent fan.
Slide the vent under the shingles so they cover the top half of the vent flange.
The lower half of the flange sits on top of the shingles.
Connect the red wire to one switch terminal and the black wire to the other terminal.
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For optimum performance locate it between the shower and the toilet.
Apply a bead of asphalt roof cement on the bottom of the vent.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom.