What it is: Moisture condensing on the underside of the roof deck from warm, humid indoor air.
Why it matters
Chronic condensation rots sheathing and grows mold; often mistaken for a roof leak.
Why it's common in Bloomington
Common in tightly built or re-insulated Bloomington homes with bath fans venting into the attic.
Signs to watch for
- frost/wet sheathing in winter
- stained roof decking
- musty attic
What we check during the inspection
We check attic ventilation, insulation depth and exhaust-fan termination.
How it's typically corrected
Vent bath/kitchen fans to the exterior, balance soffit/ridge ventilation, air-seal bypasses.
Concerned about attic condensation in a home you're buying or selling? Get a free instant quote and we'll evaluate it as part of a full inspection.