Mold In Attic From Bathroom Fan

Surviving mold in your attic venting a bathroom fan into an attic my detailed home ventilation won t prevent attic mold growth healthy indoors home inspection finds bad bathroom fan venting le to moisture where does the bathroom fan take all air quora.

Mold in attic from bathroom fan. Also plumbing stacks in the attic can be a source of condensation which can lead to attic mold growth. When warm air rises in your home it escapes through the attic leaving a vacuum behind. Mold needs 3 things to grow. Dryer vents plumbing vents kitchen or bathroom fans vented into the attic.

Moisture and mold in the attic if your bathroom fan exhausts into your attic and not outside of your home you could start having serious issues with moisture and mold. Moisture food and warmth. If you eliminate just one of these elements mold will starve and die. The vacuum is then covered by air from the basement and crawl space that contains impurities like dust mites mold spores and odors.

So make absolutely sure that they terminate outside your home and never in the attic. Telltale black mold stains typically result from this ventilation error. During cold weather warm moist air blown into a cooler attic will deposit its moisture on attic rafters and roof sheathing. For bath fans it is important to insulate around the vent pipe exiting the fan to prevent moisture from condensing inside the pipe.

Http youtu be pne imqvfoy it shows the things we noticed to diagnose the bathroom fans venting. In many cases moisture from bathroom fans is the primary source of attic mold infestation. Some builders mistakenly allow the fan to blow moist air into the attic a practice that simply moves the mold problem to another part of the house. This is a different perspective from the other video about bathroom fan venting causing mold.

Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. It is important to have a balanced ventilation system using equal amounts incoming and outgoing air. The spread of attic mold is through spores because it is light and easy to carry in the air.