Sebastian Spray Foam
Encapsulation & air sealing

Crawl Space Insulation

Cold floors and musty air usually start under the house. We seal and encapsulate crawl spaces with closed-cell foam, blocking ground moisture, rim-joist drafts, and the damp air that works its way up into the living space, on homes and commercial buildings alike.

Closed-cell spray foam sealing a crawl space

Why homeowners choose it

  • Closed-cell foam stands up to ground moisture
  • Warmer floors and steadier temperatures above
  • Shuts down mold, pests, and musty air at the source

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

Vented crawl spaces, rim joists, dirt-floor spaces, cold floors

Not sure if crawl space 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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