What it is: The rim joist area is uninsulated and unsealed, allowing air and heat loss.
Why it matters
Air leakage at the rim joist wastes energy and can cause condensation and frost in cold weather.
Why it's common in Bloomington
Bloomington basements lose significant heat through uninsulated rim joists during deep-freeze winters.
Signs to watch for
- bare wood at rim joist
- drafts along basement perimeter
- frost on the rim in winter
What we check during the inspection
The inspector observes rim joist insulation and air-sealing where accessible.
How it's typically corrected
A contractor air-seals and insulates the rim joist, often with rigid foam or spray foam.
Concerned about rim joist air leakage in a home you're buying or selling? Get a free instant quote and we'll evaluate it as part of a full inspection.