Bathroom Vent Attic Mold

Also plumbing stacks in the attic can be a source of condensation which can lead to attic mold growth.

Bathroom vent attic mold. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. Moisture enters your attic from the living space below and causes all kinds of problems including mold and wood rot. Nope venting an attic is actually pretty hard here s how ventilation is supposed to work. Most building codes require that bathrooms be equipped with active ventilation in the form of a ventilation fan.

First air enters through the soffit vents. This moist air must exhaust. A greater danger is posed by bathroom fans that vent directly into the attic or soffit areas rather than directly outside. Dryer exhaust vents kitchen exhaust fans and bathroom exhaust fans are designed to pump moisture out of your home.

Wood rot is an absolute certainty over time should you dump bath exhaust into an attic. The fan s job is to move moist air outside the house before it can condense and permeate into mold prone materials. If you have mold in your attic air leakage and poor ventilation are likely to blame. Whichever path he chose until the mold was eradicated i recommended that he stop using the all house fan which pressurized the attic blowing moldy dust back down into the house.

A bathroom exhaust fan must vent outside the right way or you can have a mold bomb in your attic. Through the roof or an exterior gable wall. It is important to have a balanced ventilation system using equal amounts incoming and outgoing air. This can also cause mold to form on wood or insulation in an attic space above a bathroom.

So make absolutely sure that they terminate outside your home and never in the attic. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. And many homes with terrible attic ventilation are completely mold free. Don t vent them in a soffit.

In many cases moisture from bathroom fans is the primary source of attic mold infestation. Mold in a bathroom can be caused by a plumbing leak but splotchy stains on wall or ceiling surfaces usually indicate inadequate ventilation too much moisture in bathroom air. Ventilation to the rescue sometimes the bathroom vent fan is a major weapon against bathroom mold. Dbs can prevent attic mold using proper air sealing ventilation and insulation to limit the amount of warm air that s escaping into your attic.

The bathroom exhausts also had to vent to the exterior and not into the attic or soffit. Options for venting a bathroom exhaust fan include best to worst. Attic ventilation is a two part process.