Slide clamps over the flexible duct at both the roof cap and the fan housing then slip the clamps over the tailpieces.
How to install roof vent bathroom fan.
Apply a bead of asphalt roof cement on the bottom of the vent.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
Since this is a new installation not a replacement your bathroom will not have ducting.
From inside the attic drive a nail through the roof directly above the bathroom vent fan.
Nail the lower corners with roofing nails and tar the heads.
To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
Center the nail between.
For optimum performance locate it between the shower and the toilet.
Table of contents hide.
The lower half of the flange sits on top of the shingles.
Choosing a whole house fan.
Then drill a hole on the roof top.
Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it.
From the roof find the nail and use the utility knife to cut roof shingles from around the nail.
Climb into the attic and clear away any insulation from around the hole.
Wrap the joints with duct tape.
How to vent a bath fan through the roof 1.