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Open-cell spray foam

Understand the foam inside the assembly.

What is open-cell foam?

Open-cell spray foam is a lower-density, softer insulation with an open cell structure. It can provide insulation and air sealing when installed at the thickness required by the selected product.

Where it fits

Open-cell products are generally used for interior insulation. Walls and roofline assemblies need a design that accounts for the building’s use, available cavity depth, and moisture conditions.

Moisture and thickness

Open-cell foam allows more water vapor to pass through than closed-cell foam. Vapor control belongs in the assembly design. Compare the product’s documented R-value and required thickness rather than relying on a general rule.

Before your estimate

Bring plans, photos of the exposed framing, and details about existing insulation and planned finishes. Ask which product is proposed and how the full assembly will be completed.

Let’s talk through your project.

Call with your plans, building details, and questions.

713-261-0454 ↗ 337-245-1692 ↗

Learn more: Spray Polyurethane Foam Alliance. Final specifications depend on the selected product and project.