Is Your Closed-Cell SPF at Risk of Shrinkage?

December 9, 2025

This week’s quiz is from Closed-cell spray polyurethane foam: Shrinkage and how to manage it. Closed-cell spray polyurethane foam delivers high R-value and air sealing—but only when it stays where it’s sprayed. From substrate temperature to lift thickness and chemical balance, several hidden factors can trigger shrinkage after installation. Take this quick quiz to test your understanding of why closed-cell SPF pulls away—and how to prevent it on your next project.

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