How to Vent a Bath Fan Through the Roof | Video. In this video, This Old House general contractor Tom Silva shows how to properly install a roof- mounted bath- fan vent. Steps: 1. From inside the attic, drive a nail through the roof directly above the bathroom vent fan. Center the nail between two rafters. From the roof, find the nail and use the utility knife to cut roof shingles from around the nail.
Slide a flat pry bar underneath the shingles around the nail to break the weather seal. Use 4¼- inch- diameter hole saw to drill through the roof, centered on the nail hole. Crimp the end of a sheet metal sleeve. Slide the sleeve into the 4- inch- diameter insulated duct. Secure sleeve to duct with foil duct tape.
Remove the connector fitting from the bath vent fan and attach it to the opposite end of the insulated duct. Secure the fitting with foil duct tape. Use a nylon zip tie to securely hold the insulation to each end of the duct. Take the end of the duct with the connector fitting and attach it to bath vent fan. Pass the opposite end of the duct through the hole in roof. Next, use aviation snips to cut slits into the sheet metal sleeve.
Bend over the tabs, then nail the tabs to the roof. Run a thick bead of tri- polymer sealant along the underside of vent hood. Apply sealant to the sides and top edge, but not along bottom edge of the hood. Slide the vent hood under the roof shingles, centered on the duct, and press down flat. Lift shingles along the side of the vent hood and nail through the hood’s flange with roofing nails.
- Adequate roof ventilation reduces cooling bills, extends shingle life, and prevents roof rot and ice dams in winter. Both roof and soffit vents are easy to install in.
- How to install a Lomanco WhirlyBird® Turbine Vent - Add ventilation your roof's attic space. - Duration: 5:01. LomancoVents 100,575 views.
- Install a Ridge Vent. To calculate an example of exhaust and intake, use 25 feet of roof ridge vent. Install an Attic Fan. Relatee Guides.
Adding a new vent on your roof. Improper Roof Vent Installation on New Roof. How To Install A Roof Vent Flashing For a Furnace Chimney. Roof Vent Types Description; Turbine Vent. Requires no outside power source; driven by the wind or, in the case of no wind, by the hot air escaping through the vent. How to Install a Roof Vent. Roof vents are devices that allow the moisture in a house to escape, which prevents the growth of mold and mildew. Roof vents also help to.
GAF Attic Ventilation, Roof Vents. Solar-Powered EcoSmart Roof Vent. install enough vents so that their combined NFA is at least 300 square inches. This story shows how to install roof vents. Installing Roof Vents. This story shows how to install roof vents. In this video, This Old House general contractor Tom Silva shows how to properly install a roof-mounted bath-fan vent. Steps: 1. From inside the attic, drive a nail. . a special roof hood. Venting through a roof vent or exhausting. Venting Exhaust Fans Through the Roof. Vent an exhaust. Install an Acrylic Tub and.
Apply sealant under the shingles to each side of the vent hood, then press them down flat. Lift the shingles above the vent hood and nail through the flange along the top of hood. Run bead of sealant under the shingles along top of vent hood, then press them down.