Closed-Cell vs. Open-Cell Spray Foam: What’s Best for Your SWFL Property?

Home Building & Design
Written By Sheehan Commette

When it comes to insulating homes and buildings in Southwest Florida’s unique climate, spray foam insulation is a top choice for energy efficiency and comfort. But not all spray foam is created equal. There are two main types—closed-cell and open-cell—and each has its own strengths. So how do you choose?

Let’s break down the differences to help you make the right call for your home, business, or building project in Collier or Lee County. 🌴☀️

What is Closed-Cell Spray Foam?

Closed-cell spray foam is a dense, rigid insulation that offers superior strength and moisture resistance. Each “cell” in the foam is completely sealed off, giving it a higher R-value and added structural integrity.

🌊 Key Benefits:

  • Higher R-value (around R-6 to R-7 per inch)

  • Acts as a vapor barrier

  • Adds structural support to walls and roofs

  • Excellent for metal buildings, roofs, and flood-prone areas

Ideal For:

New construction, metal building insulation, and projects needing maximum energy efficiency and moisture protection.

What is Open-Cell Spray Foam?

Open-cell spray foam is lighter and more flexible. The cells in the foam remain partially open, which makes it softer and less dense than closed-cell.

🌊 Key Benefits:

  • Great sound absorption

  • Lower cost per square foot

  • Expands more—great for hard-to-reach areas

  • Effective air seal

Ideal For:

Interior walls, attics, and retrofit projects where budget and soundproofing are priorities.

So, Which One Do You Need?

In SWFL, we often recommend closed-cell spray foam for its strength and moisture resistance, especially in high-humidity coastal zones. But open-cell foam still has its place in certain retrofit or interior applications.

Still unsure? That’s where we come in. Ocean Spray Foam specializes in both systems and will help you choose the best fit for your specific project.

Let’s Get You Insulated 🌊

If you're building or upgrading in Naples, Fort Myers, Bonita Springs, or anywhere in Collier or Lee County, we're here to help you seal it right and seal it tight.

📞 Call today at (239) 293-6117
🌐 Learn more or schedule your free estimate: OceanSprayFL.com
📍 Serving all of SWFL – Everglade City, Marco Island, Naples, Bonita Springs, Estero, Fort Myers
#SWFLConstruction #SprayFoam #NaplesFL #FortMyers

Sheehan Commette
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🌊 Building Science 101: What Is the Building Envelope—And Why It Matters for Energy Efficiency in SWFL