Closed-Cell Spray Foam Insulation in Nashville and Middle Tennessee
Walls, Floors & Spray Foam

Closed-Cell Spray Foam Insulation

A dense, rigid foam with high R-value per inch that also resists moisture, ideal for tight spaces, rim joists and crawl walls.

Closed-cell spray foam expands into a firm, dense layer with a very high R-value per inch. It bonds to the surface, seals air leaks and acts as a vapor retarder, so it earns its place in spaces that are cramped, damp or structurally demanding.

We use it where its strengths matter: rim joists, crawl space walls, roof decks, foundation walls and metal buildings. A trained crew sprays in controlled passes, trims the surface and checks thickness, so you get the depth you need and no more.

Where closed-cell shines

Tight cavities, rim joists and crawl space walls benefit from its high R-value per inch and its resistance to moisture. It is a strong choice below grade and on a roof deck.

Added stiffness

Closed-cell foam adds some rigidity to the wall or roof it bonds to. That is useful in metal buildings, pole barns and thin framing.

Vapor and water resistance

Because it is a vapor retarder and resists liquid water, it suits basements, crawl spaces and flood-prone areas when the structure around it is sound.

Safe application and curing

Spray foam is a chemical process. We protect the work area, ventilate, ask occupants to stay out during application and follow the manufacturer cure time before re-entry.

What is included

  • Project review and material choice
  • Surface preparation and masking
  • Foam applied in controlled passes
  • Trimming and thickness check
  • Ignition or thermal barrier where required
  • Cleanup and cure instructions
Before and after

See the transformation.

Drag the handle to compare.

After: an attic roof deck with smooth spray foam insulation sealing the underside of the roof deck between the raftersBefore: an attic roof deck with bare rafters and roof sheathingBeforeAfter
Bare roof deck sealed with spray foam. From bare rafters and roof sheathing to smooth spray foam insulation sealing the underside of the roof deck between the rafters.
Why it works

What you get with Closed-Cell Spray Foam

Moisture-resistant

Suited to crawl spaces and foundation walls.

High R per inch

More performance in less depth.

Air sealing built in

Bonds into gaps and seams.

Adds stiffness

Useful in metal and thin framing.

Checked thickness

Measured with a depth gauge.

Safe application

Protected, ventilated and cured.

Try it now

Spray Foam Board Feet and Thickness Calculator

Enter the area and the thickness to see board feet of foam and the approximate R-value for open-cell and closed-cell.

How it works

Our process, start to finish.

  1. 01

    Call and schedule

    You tell us what is going on, which rooms bother you and what you hope to change, and we set a time that fits your day.

  2. 02

    Inspect and assess

    We walk the attic, walls, crawl space and equipment, measure depths and use thermal imaging when it helps.

  3. 03

    Seal and prepare

    We protect the house, seal air leaks, place baffles and fix small problems so the insulation can do its job.

  4. 04

    Install the insulation

    Loose-fill, batts, foam or board goes in to the planned depth, with clean edges and clear markers.

  5. 05

    Verify and test

    We measure the result, take photos and test air leakage when the scope includes it.

  6. 06

    Walk through and enjoy

    We walk the finished work with you, answer questions and leave the site clean.

Questions

Closed-Cell Spray Foam FAQ

Is closed-cell foam worth the cost?

For rim joists, crawl walls and roof decks it often is, because it does several jobs at once. For open attic floors, loose-fill usually costs less.

Does closed-cell foam need a cover?

In occupied or accessible spaces, a thermal or ignition barrier is typically required. We review the requirement for each project.

Can it be used on a wet wall?

The wall should be sound and the source of water fixed first. Foam does not cure a leak.

Is spray foam safe?

Applied by trained crews and given its full cure time, it is stable. We follow the manufacturer safety guidance and keep occupants out during application.

Will I smell it afterward?

A short, mild odor is common right after installation. A correct mix and ventilation help it clear quickly.

Next step

Get your free Closed-Cell Spray Foam estimate.

Tell us about the project and we will call you back to talk it through.

Or call (615) 357-7797 to talk now.

Tell us about your project

We will call you back to talk it through and set up a visit.

Prefer to talk? Call (615) 357-7797. We never sell your information.

Call NowFree Estimate