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

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Open Cell vs. Closed Cell Spray Foam Insulation

Open Cell vs. Closed Cell Foam: What's the Difference?

Closed cell Foam vs open cell Foam

Spray Foam Insulation – North East Foam Solutions

Spray Foam Insulation – North East Foam Solutions

Images of (a) open-cell, and (b) closed-cell foam. Open pores have

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