Installing Roof Vent For Bathroom Exhaust Fan

Choosing a whole house fan.

Installing roof vent for bathroom exhaust fan.

Several different ways you can move that hot air to the outside. If you have two bathrooms that are close together and one has an exhaust fan and the other doesn t you might be. Apply a bead of asphalt roof cement on the bottom of the vent. Nail the lower corners with roofing nails and tar the heads.

Slide the vent under the shingles so they cover the top half of the vent flange. Each bathroom has its own exhaust fan. If the hole is too big you ll need to patch the ceiling. Cut a piece of drywall to make the ceiling hole the right size for your fan.

Attach the drywall filler to a larger piece of wood set it in the hole and drive screws through the ceiling into the wood. It is because of this that many builders tend to advise against this method. 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. From the roof find the nail and use the utility knife to cut roof shingles from around the nail.

Each fan vents separately out the roof. 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. The lower half of the flange sits on top of the shingles. Center the nail between two rafters.

This involves running ductwork from the fan usually though an attic and out through the roof. For optimum performance locate it between the shower and the toilet. We explain how to install bathroom exhaust fans or vents the vent ducting the vent termination at the wall soffit or roof vent fan wiring bath vent duct insulation bath vent lengths clearances routing and we answer just about any other bathroom ventilation design or installation question you may have. One in line centrifugal fan can be mounted in the attic to exhaust the moisture from two bathrooms.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. 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. The patched areas can be repaired with spackling later.

From inside the attic drive a nail through the roof directly above the bathroom vent fan.