How To Install Roof Vent Bathroom Fan

Nail the lower corners with roofing nails and tar the heads.

How to install roof vent bathroom fan.

How to vent a bath fan through the roof 1. Wrap the joints with duct tape. Choosing a whole house fan. Slide the vent under the shingles so they cover the top half of the vent flange.

For optimum performance locate it between the shower and the toilet. The lower half of the flange sits on top of the shingles. 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.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. Apply a bead of asphalt roof cement on the bottom of the vent. Then drill a hole on the roof top. Climb into the attic and clear away any insulation from around the hole.

Venting means that after air from the bathroom is drawn into the exhaust fan it is blown through a connected flexible duct and out of the house through a hole in the side of the house or roof. Slide clamps over the flexible duct at both the roof cap and the fan housing then slip the clamps over the tailpieces. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. 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. Table of contents hide.