Both last the life of the building when properly installed. Closed cell is more physically durable.

Is closed cell worth the extra cost?

In crawl spaces and metal buildings, almost always yes. In attics, open cell often delivers comparable comfort for less money.

Open Cell vs Closed Cell Spray Foam

Name: Scenic City Insulation
Address: Chattanooga, TN, US
Telephone: (423) 464-7464
Price range: $$

Both are spray foam. Both air seal. They cost differently and perform differently — and which one belongs in your project depends on where it's going.

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Side by Side

Open cell: R-3.7/inch, ~$1.00–$2.00/bd ft, vapor permeable, soft. Closed cell: R-7/inch, ~$1.75–$4.50/bd ft, vapor barrier, rigid, adds structure.

Best Use Cases

Open cell wins in attics and interior walls. Closed cell wins in crawl spaces, metal buildings, and anywhere moisture matters.

In Chattanooga's Humid Climate

We default to closed cell anywhere moisture or condensation is a risk. Open cell is fine for conditioned attic applications.

Frequently asked questions

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