10/16/2026
The furnace kicks on for the first time, and a week later there’s a water stain on the ceiling. It might not be a leak.
Warm, damp house air rises into the attic. In October the underside of the roof decking is cold, so that air condenses on it, the same way a cold glass sweats. Enough of it drips back onto the insulation and through to the drywall. A bath fan that vents into the attic instead of outside makes it worse.
It looks like a roof leak, so the roofer gets called. Sometimes the roof is fine and the attic is just breathing wrong.
A new stain with no recent rain is the tell. We check the roof and the attic both. The inspection is free.
[email protected] or (402) 890-6460