Is spray foam insulation waterproof? | In most cases | 40% | In some cases | 40% | Not sure | 20% | | | Question: Is spray foam insulation waterproof? Top Answer (40% of 5 votes): In some cases.
Answer: In some cases Explanation: Open cell spray polyurethane foam is not but closed cell is in most cases. | Poly Energy | Answer: Not sure Explanation: Not sure | TLS Energy Savers |
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