Polyisocyanurate (or polyiso) foam board insulation is more efficient than EPS foam board insulation. | | True | 58% | | False | 25% | | Not sure | 16% | | | | | Question: Polyisocyanurate (or polyiso) foam board insulation is more efficient than EPS foam board insulation. Top Answer (58% of 12 votes): True.
Answer: True
Explanation: Polyiso has an R value of 6.5 per inch of thickness, while expanded polystyrene (EPS) is 4 per inch. Extruded polystyrene (XPS) has an R value of 5 per inch. | | Progressive Energy Services | Answer: Not sure
Explanation: Both have different applications. | | MetroNYInsulation.com | Answer: True
Explanation: More efficient | | TLS Energy Savers |
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