What affects the price
- Perimeter linear feetAverage house 100-180 ln ft of rim joist.
- MaterialClosed-cell spray foam $8-$15/ln ft; rigid foam + caulk $5-$10/ln ft.
- AccessFinished basement requires drywall removal.
What's included
- Rim joist seal (closed-cell spray foam or rigid foam + caulk)
- EPA SPF certified applicator (spray foam)
- Cleanup
When to call
Before winter heating season. Rim joist sealing is one of the highest-ROI energy retrofits in Ohio because cold air enters basements through this gap.
Related questions
Why are rim joists important?
Cold air enters basements through the rim joist gap between floor joists and the sill plate. Sealing this gap drops heating bills 10-20% and stops the cold-floor problem.
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