Can Spray Foam Really Live Underground for Decades? @SprayJones
Can Spray Foam Really Live Underground for Decades?  @SprayJones
Uploaded June 2026 | Updated September 2026, 1 week ago
Most people think spray foam belongs inside a building.

They're wrong.

In this video we're spraying closed-cell spray foam directly onto concrete foundations, water vaults, and in-ground structures, creating a seamless insulation and moisture-management layer that eliminates many of the weaknesses found in traditional systems.

No board joints.

No thousands of linear feet of seams.

No insulation falling away from the wall.

No water getting behind the insulation.

No separate waterproofing membrane.

The foam is sprayed as a liquid, expands in place, and bonds directly to the concrete. Every corner, penetration, transition, and irregular surface becomes part of one continuous system.

Closed-cell spray foam is uniquely suited for these applications because it combines:

✔ High R-value
✔ Excellent adhesion to concrete
✔ Low water absorption
✔ Air barrier performance
✔ Dimensional stability
✔ Monolithic installation

In this project you'll see residential and commercial examples, including foundation walls, frost protection details, and precast concrete water vaults.

The goal isn't just insulation.

The goal is creating a durable building envelope that performs for decades.

Because once concrete goes in the ground, nobody wants to dig it back up.

Social Media Version

Concrete in the ground is one of the most overlooked opportunities for spray foam.

Most systems require multiple products:

• Waterproofing membrane
• Rigid insulation
• Fasteners
• Tapes
• Protection board

Closed-cell spray foam combines all of that into a single fluid-applied system bonded directly to the concrete.

No seams.

No gaps.

No water getting behind the insulation.

No boards shifting or separating over time.

In this video we're spraying everything from residential foundations to commercial water vaults and showing why closed-cell foam has become one of my favorite underground applications.

Once you understand what happens underground over 10, 20, or 30 years, it's hard to look at stacks of rigid insulation the same way again.

Watch the full video and tell me: would you rather trust thousands of seams, or one continuous layer bonded directly to the concrete?
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Can Spray Foam Really Live Underground for Decades?

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