New homeowner goes to fix roof vent, then finds bathroom fan was never connected at all
A new homeowner discovered that their bathroom fan was never connected to the roof vent, causing moisture to vent directly into the attic. This common oversight can lead to significant long-term damage like mold and rot if not addressed with simple duct repairs.
Why it matters
Proper home ventilation is critical for structural integrity and energy efficiency, yet many DIY or contractor errors remain hidden until they cause expensive damage.
Issues like this can remain invisible to homebuyers until after move-in and create expensive problems.
In a post to Reddit's r/HVACAdvice community, the homeowner wrote, "I just bought this house, and I was aware of the top of the t duct not being connected to the roof vent but when I went up there to fix that I moved insulation out of the way and noticed that no attempt was even made to connect this fan to the duct."
The original poster then added, "Do they make some kind of adapter to connect this oval to the round duct? The T is 4", the duct going down is smaller, but I could just remove that. The flex duct is connected to the other bathroom fan."
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