Install Bathroom Exhaust Fan Through Roof

Make sure that your roofer is familiar with flashing methods for making this type of penetration leak free.

Install bathroom exhaust fan through roof.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. 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. This involves running ductwork from the fan usually though an attic and out through the roof. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof.

All of that said commercial roofers install exhaust fan terminations through flat roofs all the time. Https amzn to 2ynuz8u participate in giveaways. If the bath exhaust fan is used regularly it will help melt snow. From the roof find the nail and use the utility knife to cut roof shingles from.

The master bathroom and the 2nd bathroom vent through the roof and through the same opening. For optimum performance locate it between the shower and the toilet. Climb into the attic and clear away any insulation from around the hole. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.

The 2nd bathroom vent drips on the floor and is ruining the ceiling. 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. From inside the attic drive a nail through the roof directly above the bathroom vent fan. Small bath fans provide adequate bathroom ventilation for 79 sq ft.

If you have access to the attic the fan can vent either through a gable wall or roof. Avoid venting through a soffit vent or ridge vent. In maryland in any case i m guessing that deep snow is rare. The first step in figuring out how to install a bathroom fan is cutting a hole based on the size of the fan you need.

Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood. Draw a mark on the bathroom ceiling where you d like to install the vent fan. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic. Center the nail between two rafters.

It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.