2nd Floor Bathroom Ventilation And Exhaust Into Attic

The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

2nd floor bathroom ventilation and exhaust into attic. Draw a mark on the bathroom ceiling where you d like to install the vent fan. Water is everywhere in a bathroom. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. And there is one other invisible place where you will find water in the bathroom.

Climb into the attic and clear away any insulation from around the hole. Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life. For optimum performance locate it between the shower and the toilet. 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.

The 2nd bathroom vent drips on the floor and is ruining the ceiling. It may also violate a shingle warranty. Bath exhaust fans are about keeping your house in top shape by moving water out of your bathroom.