Interior spray foam insulation
Closed-cell and open-cell foam for outbuildings, agricultural buildings, and commercial interiors. It air-seals and raises R-value in a single pass.
Get a free assessment- Closed-cell R
- 6.0 to 6.5 / in
- Open-cell R
- 3.5 to 3.8 / in
- Air barrier
- Yes
- Vapor barrier
- Closed-cell, 1.5 in+
- Use
- Ag & outbuildings
- Standard
- ASTM C1029
Insulate and air-seal in one pass
Spray foam insulates and air-seals in one step, which makes it the right fit for the buildings that need to hold a temperature and stop drafts: shops, outbuildings, agricultural buildings, and commercial interiors. Closed-cell foam delivers high R-value and doubles as an air and vapor barrier; open-cell is lighter and good for sound control. Code requires the foam be protected by a thermal or ignition barrier, which we detail as part of the work.
Agricultural buildings, shops, pole barns, and metal buildings live and die by their envelope. Wind moves through every gap, condensation forms on cold metal, and batt insulation sags and traps moisture. Spray foam adheres directly to the structure and seals it as one continuous layer.
This is commercial and agricultural work. We are not a residential remodel contractor, and we frame interior foam as part of the building-envelope work we do across outbuildings, ag structures, and commercial interiors.
Two foams, two jobs
The right foam depends on what the assembly needs to do. Here is how closed-cell and open-cell compare across the properties that matter in ag and outbuilding work.
| Attribute | Closed-cell | Open-cell |
|---|---|---|
| R-value per inch | 6.0 to 6.5 | 3.5 to 3.8 |
| Air barrier | At 1 in+ | At 3.75 in+ |
| Vapor barrier | At 1.5 in+ | No (permeable) |
| Water resistance | Hydrophobic | Absorbs |
| Best for | Ag, cold storage, metal buildings | Sound, interior partitions |
R-values are nominal per inch. Air and vapor barrier thresholds follow installed thickness.
Built for ag and outbuildings
- Agricultural buildings
- Shops and outbuildings
- Metal buildings
- Pole barns
- Commercial interiors
- Crawlspaces
Fire and code
Foam plastic is not a finished interior surface. Code requires it to be separated from the building interior by a thermal barrier, typically half-inch gypsum board (IBC 2603.4). Some unoccupied spaces entered only to service utilities allow an ignition barrier instead (IBC 2603.4.1.6; IRC R316.5 is the residential equivalent).
We detail the required barrier as part of the work, so the assembly is code-compliant when we leave.
Interior spray foam questions
What buildings is interior spray foam for?
Outbuildings, shops, agricultural buildings, metal buildings, pole barns, and commercial interiors: any structure that needs to hold a temperature and stop air leaks. It is commercial and ag work, not a residential remodel line.
Closed-cell or open-cell, which do I need?
Closed-cell delivers about R-6 to 6.5 per inch and acts as an air and vapor barrier, ideal for ag buildings, metal buildings, and cold storage. Open-cell is about R-3.5 to 3.8 per inch, vapor-permeable, and better for sound control on interior partitions.
Does spray foam need a fire barrier?
Yes. Code requires foam plastic to be separated from the building interior by a thermal barrier (IBC 2603.4, typically half-inch gypsum). Some unoccupied spaces, such as attics and crawl spaces entered only to service utilities, allow an ignition barrier instead (IBC 2603.4.1.6; IRC R316.5 is the residential equivalent). We detail the required barrier as part of the job.
Is it good for agricultural buildings?
Yes. Closed-cell foam is hydrophobic, seals air leaks, and resists the moisture and temperature swings common in ag and outbuilding environments.
Can you insulate a metal building?
Yes. Spray foam adheres directly to metal panels and purlins, stopping condensation and air leaks that batt insulation cannot in a metal building.
What standard does it meet?
Spray-applied rigid cellular polyurethane foam is specified under ASTM C1029.
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Tighten your building envelope
Closed-cell or open-cell, installed to code with the right barrier, on ag buildings, outbuildings, and commercial interiors. Tell us about the space and we will spec it.
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