Install Bathroom Exhaust Fan Through Roof

Small bath fans provide adequate bathroom ventilation for 79 sq ft.

Install bathroom exhaust fan through roof.

Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. Center the nail between two rafters. If the bath exhaust fan is used regularly it will help melt snow.

First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. From inside the attic drive a nail through the roof directly above the bathroom vent fan. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. Make sure that your roofer is familiar with flashing methods for making this type of penetration leak free.

Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. From the roof find the nail and use the utility knife to cut roof shingles from. And under while medium bath fans work well for bathooms 70 to 100 sq ft. All of that said commercial roofers install exhaust fan terminations through flat roofs all the time.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. The 2nd bathroom vent drips on the floor and is ruining the ceiling. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. This involves running ductwork from the fan usually though an attic and out through the roof.

For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it. Climb into the attic and clear away any insulation from around the hole. How to vent a bathroom exhaust fan ipower vent hose.

Draw a mark on the bathroom ceiling where you d like to install the vent fan. Https amzn to 2ynuz8u participate in giveaways. For optimum performance locate it between the shower and the toilet. Avoid venting through a soffit vent or ridge vent.

In maryland in any case i m guessing that deep snow is rare. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.