Is Your Bathroom Fan Causing a “Roof Leak”?

Not every roof leak is actually coming from your roof! One of the most common hidden causes of attic moisture problems is a bathroom fan venting into the attic instead of outside. This can lead to serious condensation issues that mimic a leak.

How Does It Happen?

Warm, humid air from your bathroom rises and gets trapped in the attic.

In cold weather, this moisture condenses on the underside of the roof deck, causing water drips, mold, and even rot.

Over time, this hidden moisture damage can lead to expensive repairs and reduce your roof’s lifespan.

How to Prevent It:

Ensure Proper Venting – Your bathroom fan should vent directly outside through the roof or wall, NOT into the attic.

Check for Disconnected Ducts – Make sure the vent hose is securely attached and free of leaks.

Use Insulated Ducting – This prevents condensation from forming inside the duct.

Improve Attic Ventilation – A well-ventilated attic helps control moisture levels year-round.

If you’re noticing mysterious water stains or attic moisture, Roofwise Roofing can inspect your roof and ventilation to find the real problem before it causes major damage. Call us today!

250.410.1985