Installing Vent In Bathroom Through The Roof

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Installing vent in bathroom through the roof.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. 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.

A down through soffit exhaust vent design by leaving warm air in the exhaust duct when the fan is off creates a heat trap that reduces heat loss out of the bathroom through the exhaust fan duct when the fan is off in comparison with up routed vents or even horizontal vents through a gable end wall. Nail the lower corners with roofing nails and tar the heads. See below for a shopping list and tools subscribe. Choosing a whole house fan.

Center the nail between. Slide a flat pry bar underneath the. Secure the vent flanges with roofing nails before installing the shingles. From inside the attic drive a nail through the roof directly above the bathroom vent fan.

Then drill a hole on the roof top. 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. Table of contents hide. Position the vent pipe up to the bottom of the roof.

Several different ways you can move that hot air to the outside. Each bath fan should be on a separate 4 or larger duct and the outside vent portion must have a baffle damper to prevent anything from coming into the duct work. Apply a bead of asphalt roof cement on the bottom of the vent. Slide the vent under the shingles so they cover the top half of the vent flange.

Any person competent in installing an outside vent either thru the roof soffit or gable hip end of the house thru the siding. The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof. Apply roofing adhesive on the underside of the flanges to seal. How to vent a bath fan through the roof 1.

The lower half of the flange sits on top of the shingles. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. With the pipe in a vertical position trace around the pipe using a pencil.