Do You Know What Causes Closed-Cell SPF Shrinkage—and How to Prevent It?

December 30, 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-values and air sealing—until shrinkage compromises performance. Test your knowledge on why shrinkage happens, how it shows up on site, and the steps installers and specifiers can take to manage the risk.

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Do You Know What Causes Closed-Cell SPF Shrinkage—and How to Prevent It?

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