How To Install Roof Vent For Bathroom Fan

Idea 5 connecting the duct to the bathroom fan remove the tape from the fan first.

How to install roof vent for bathroom fan. Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. Attach the drywall filler to a larger piece of wood set it in the hole and drive screws through the ceiling into the wood. The patched areas can be repaired with spackling later. Another method a little bit better is if you have a gable style roof and a gable vent on one end of the house you can attach this to the back of a gable vent.

In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. The lower half of the flange sits on top of the shingles. Center the nail between two rafters. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.

Table of contents hide. For optimum performance locate it between the shower and the toilet. Apply a bead of asphalt roof cement on the bottom of the vent. Climb into the attic and clear away any insulation from around the hole.

To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. Draw a mark on the bathroom ceiling where you d like to install the vent fan. Several different ways you can move that hot air to the outside. Slide the vent under the shingles so they cover the top half of the vent flange.

If the hole is too big you ll need to patch the ceiling. Apply roofing adhesive on the underside of the flanges to seal. One is to route it over to a soffit vent and attach it to the back of the soffit vent but this can work against your exhaust fan because that s actually an air intake so not as good as other methods. How to install a bathroom fan vent in the soffit.

From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Next we must slip a worm drive metal clamp on the inside part of duct liner. From inside the attic drive a nail through the roof directly above the bathroom vent fan. Then drill a hole on the roof top.

Secure the vent flanges with roofing nails before installing the shingles. Cut a piece of drywall to make the ceiling hole the right size for your fan.