Open-Cell Spray Foam
Insulation.
Soft, expansive, sound-deadening. The cost-effective spray foam for interior walls, second-story ceilings, and soundproofing. Installed by Premium Foam, our spray foam division — backed by CCL Contracting.
Open-cell spray foam is exactly what it sounds like — millions of microscopic cells, each open at the surface, allowing air and sound to pass through. The result is a soft, sponge-like foam that's lower density than closed-cell, expands much further during install, and excels at deadening noise.
When sprayed, open-cell expands roughly 100 times its liquid volume — it fills every gap, cavity, and seam aggressively. That same expansion makes it cost-effective for high-volume applications: full-attic encapsulation, second-story ceilings, interior wall fills.
Open-cell isn't a moisture barrier. It absorbs water if exposed to it. That's why it lives indoors — interior walls, ceilings, soundproofing applications. For exterior walls, roof decks, or anywhere RGV humidity hits, closed-cell is the right call. For everywhere else, open-cell delivers most of the energy savings at a fraction of the cost.
Open-cell.
By the numbers.
Where open-cell
makes the most sense.
Open-cell is the cost-effective spray foam — the right choice indoors, where humidity isn't a factor and soundproofing matters. Three places it earns its keep in the Rio Grande Valley.
Interior Walls & Ceilings
Open-cell's expansion fills every gap in interior walls and ceilings, eliminating drafts and cold spots. Combined with its soundproofing, it's the standard for any wall or ceiling that doesn't face the outside.
→Second-Story Floors & Soundproofing
Sprayed between floor joists, open-cell dramatically reduces sound transfer between floors. Music rooms, home theaters, kid's bedrooms, home offices — anywhere noise control matters.
→Attic Encapsulation (Unvented Attics)
For unvented attic systems, open-cell is the cost-effective way to encapsulate the whole space. Most RGV homes can be fully encapsulated with open-cell at a fraction of the closed-cell price.
→Open-cell vs
closed-cell.
Both have their place. Here's how they differ — at a glance.
Open-Cell
- R-value per inchR-3.7
- Density0.5 lb/ft³
- CostLower
- Moisture barrierNo
- Structural strengthMinimal
- SoundproofingSuperior
- Best forInterior walls, ceilings, second-story floors
Closed-Cell
- R-value per inchR-7
- Density2 lb/ft³
- CostHigher
- Moisture barrierYes
- Structural strengthAdds rigidity
- SoundproofingDecent
- Best forExterior walls, roof decks, metal buildings
Not sure which? Get a free assessment — we'll recommend the right system for your project.
RGV homes have specific patterns that make open-cell a smart choice in specific places. Interior walls between rooms see no humidity exposure, no exterior heat — open-cell delivers air-sealing and sound-deadening at a price that makes whole-home retrofits affordable. Most RGV homes that aren't fully spray-foamed got there because the budget felt out of reach. Open-cell is how that math changes.
The combination most often used in RGV homes: closed-cell on exterior walls and roof deck (where humidity and structural strength matter), open-cell on interior walls and second-story ceilings (where soundproofing and cost-effectiveness win). We'll recommend the right hybrid system for your home during the free assessment.
Four steps.
No surprises.
A clear process from the first phone call to the final walkthrough — same crew, same standards, same construction-degreed leadership as the rest of CCL.
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i.
Free On-Site Assessment
We come to your home, inspect the application areas, and recommend whether open-cell, closed-cell, or a hybrid is right for your project. Quotes typically delivered within 48 hours.
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ii.
Project Prep
We mask, contain, and protect non-spray surfaces. The work area is sealed off and ventilated per OSHA standards before a drop of foam is sprayed.
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iii.
Same-Crew Spray Application
PPE-equipped crew sprays open-cell in larger passes — it expands 100x its liquid volume and fills aggressively. Most full-home open-cell installs are completed in 1 day.
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iv.
Cure, Trim, and Walkthrough
12–24 hour cure. We trim any overspray flush with framing, clean the work area, and walk through the finished install with you before signing off. Warranty paperwork on the same day.
Real answers.
No fluff.
The questions homeowners and business owners across the RGV ask us most about open-cell spray foam. Don't see yours? Reach out.
Get your free estimate
Fill in your details. No obligation — just a real conversation about your project.