Mold In Attic From Bathroom Vent

First and foremost the fan must be ducted to the exterior not to the attic.

Mold in attic from bathroom vent.

Moisture food and warmth. Dryer vents plumbing vents kitchen or bathroom fans vented into the attic. In many cases moisture from bathroom fans is the primary source of attic mold infestation. If you eliminate just one of these elements mold will starve and die.

Not all building jurisdictions require bathrooms to have an exhaust fan if the bathroom has an openable window that has 1 5 square foot of open area when open. The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space. Symptoms to watch for. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.

Are exhaust fans required for a bathroom. A greater danger is posed by bathroom fans that vent directly into the attic or soffit areas rather than directly outside. Mold in air vents. Related to 3 above this practice can pump warm moist air into the attic where it can be trapped and begin the cycle of mold growth.

Common symptoms and health problems caused by black mold may include. Mold needs 3 things to grow. Attics usually have a passive ventilation system in which outside air comes in through the soffit eave vents at the bottom warms up in the attic and escapes through the can or ridge vents at the top because hot air rises. Bathroom ventilation done right fortunately there are several ways to make sure the bath fan is used properly to evacuate moist air.

Telltale black mold stains typically result from this ventilation error. It is important to have a balanced ventilation system using equal amounts incoming and outgoing air. Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.