Open-Cell vs. Closed-Cell Foam Insulation - Fine Homebuilding

The reader asks, "I’m using closed-cell in the basement, but is it also best upstairs, particularly against the roof deck?" In this Q. & A., get expert advice about a question regarding open-cell vs. closed-cell foam.

Considering the Differences Between Closed and Open Cell Spray

what is the difference between closed cell and open cell foam?

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What is Better Open Cell or closed cell foam insulation?