Sebastian Spray Foam
The draft you can't see

Rim Joist Insulation

The rim joist, the band where the floor framing meets the foundation, is one of the most common and overlooked draft paths in a house. We seal it with closed-cell foam, shutting down cold air and moisture at the point most insulation never reaches.

Sealing a rim joist with closed-cell spray foam

Why homeowners choose it

  • Closes one of the most common draft paths in a home
  • Closed-cell foam blocks cold air and moisture together
  • Pairs naturally with basement and crawl space work

How we install it

1

Free in-home assessment

We inspect your attic, walls, or crawl space and find exactly where your home is leaking energy.

2

A clear, fair quote

You get a straightforward plan and price, the right material for each space, no upsell.

3

Clean, expert install

Our expert crew seals the envelope, protects your home throughout, and leaves it spotless.

Best for

Basements, crawl spaces, band joists

Not sure if rim joist insulation is right for your space? We'll assess your home for free and recommend the material that actually fits.

Request an estimate

Done properly the first time.

Request an estimate and we'll assess your home or building, specify the right material for each space, and give you a clear plan. On schedule, spotless, and finished when we said we would.

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