08/14/2026
The Bathroom Venting Rule That Prevents Mold đźšż
Your bathroom fan might be doing its job… but if it’s venting to the wrong place, you could be creating a moisture problem.
Building code requires bathroom exhaust to be vented to the exterior — not into your attic.
Why does that matter?
Every shower puts warm, humid air into your bathroom. If that moisture is dumped into the attic, it can condense on cold surfaces and contribute to mold, rot, and other long-term problems.
And this is especially important in older homes, where you may find bathroom fans that were never properly vented outside.
It’s a simple detail, but it can make a huge difference in how your home performs.
Check where your bathroom fan actually vents. You might be surprised.
Save this before your next renovation.
👉 ShullArchitecture.com
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