I'm curious if installing a gable fan would be an effective way to help reduce mold in my attic. I own a small, rustic summer home in damp Maine, and I've noticed some mold up there—not a ton, but enough to be concerned. I've tried large desiccant containers, but I'm considering adding a gable fan on a timer for better ventilation. I recently renovated the roof with metal shingles but didn't install a vent, which I realize might have been a mistake. Would a fan help, or should I look at other options?
5 Answers
Honestly, your roofer should have mentioned venting options when they installed your roof. You might not actually need a fan if you can just fix the ventilation with proper vents instead.
Have you considered getting an energy assessment for your home? They might suggest effective solutions for ventilation that could reduce costs on renovations. Check out Efficiency Maine for possible rebates or discounts.
Mold thrives on surfaces where it grows, and a fan won't blow it away. The main issue is moisture. While a vent fan can help with humidity, if the outside air is too humid, that won't solve the problem either.
A fan could definitely help with airflow, but keep in mind that desiccants will get saturated quickly and stop being effective. Do you have soffit vents? You need proper intake at the lower part of the attic to balance out the exhaust at the top. Also, ensure your bathroom vents lead directly outside and aren’t discharging into the attic.
Using desiccant containers for mold might not be the best strategy; they're like trying to empty a pool with a spoon. It’s better to install a vent with a fan on either gable end.
Totally agree! Fixing those vents might be the solution you're looking for without needing a fan.