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Atlas Insulation • Air Sealing + Comfort
Open Cell Spray Foam Insulation in South Florida
Open cell spray foam expands to fill gaps and cracks, helping reduce air leakage and improve comfort in South Florida homes and buildings—especially in attics, walls, and rooflines.
Comparing foam types? See closed cell spray foam. Prefer traditional options? Explore blown-in insulation or batt insulation.
Get an open cell spray foam quote
Share your attic/wall scope and square footage. We’ll recommend the right approach for comfort, air sealing, and budget.
Serving South Florida for residential and commercial insulation installs.
What is open cell spray foam?
Open cell spray foam is a light-density foam that expands to seal gaps and voids as it cures. It’s commonly used to improve comfort by limiting unwanted air movement, which is a big deal in hot, humid climates where conditioned air can leak out and humid air can leak in.
Where open cell spray foam works best
- Attics and rooflines: Reduce air leakage and stabilize indoor temperatures.
- Wall cavities: Fill irregular spaces and minimize drafts.
- Bonus rooms: Improve comfort in rooms that run hot.
- Remodels: Targeted upgrades when areas are open and accessible.
Important: Foam performance depends on surface prep, application thickness, and coverage consistency. Our installs focus on coverage and clean execution—not shortcuts.
Open cell vs closed cell (quick comparison)
| Foam type | Best for | Strengths | Considerations |
|---|---|---|---|
| Open cell | Attics, walls, comfort + air sealing | Expands to fill gaps; effective at limiting air leakage | Project-specific guidance needed for moisture strategy |
| Closed cell | High-performance assemblies, added rigidity | Higher density; strong insulation value per inch | Higher cost; needs precise installation conditions |
Want the denser option? See closed cell spray foam.
Common problems open cell spray foam helps solve
Comfort + HVAC strain
- Hot rooms or uneven temperatures
- AC running longer than expected
- Rooms that never “feel right” in summer
Air leakage + humidity
- Drafty spaces and air movement
- Humid air infiltrating conditioned areas
- Dust and allergens coming in through gaps
If your attic needs more of a “blanket” over the ceiling plane, we may recommend blown-in insulation instead—or as a pairing strategy depending on the build.
Our open cell spray foam installation process
We keep the process straightforward: evaluate, protect the space, apply consistently, and confirm coverage. This keeps the job clean and the results predictable.
- Project evaluation: Identify goals, access, and scope.
- Surface prep: Ensure areas are ready for consistent application.
- Controlled application: Even coverage across target zones.
- Detail work: Address edges, penetrations, and transitions.
- Clean finish: Protect adjacent areas and keep it tidy.
- Final check: Verify coverage and jobsite condition.
Credible guidance on spray foam insulation
The U.S. Department of Energy provides an overview of spray foam insulation and where it fits in energy upgrades.
Why choose Atlas for open cell foam
- Clean installs: We protect the space and keep the jobsite tidy.
- Coverage-focused: Consistent application, not patchy “spot foam.”
- Real recommendations: We’ll tell you if another insulation fits better.
- Residential + commercial: Crews ready for both scopes.
Related services
Open Cell Spray Foam FAQs
Quick answers before you schedule.