NYC • Long Island • New Jersey
Seal It Tight. Save Big. Stay Comfortable.
We'll use your ZIP code to determine your local energy code requirements and pricing region.
| Feature | 🔵 Open Cell | 🔴 Closed Cell |
|---|---|---|
| R-Value per inch | ~3.5–3.8 | ~6.5–7.4 |
| Price per board foot (1") | $0.25 | $1.15 |
| Vapor Barrier | No | Yes (at 2") |
| Air Seal | ✓ Yes | ✓ Yes |
| Soundproofing | Excellent | Moderate |
| Structural Strength | No | Yes |
| Attic thickness needed | 13–17" | 7–9" |
| Best for | Interior walls, attics, retrofit | Basements, crawl spaces, roofs |
🧠 Pro Contractor Strategy
Use closed cell where it matters (basements, exterior walls, roof decks) and open cell where you can save money (interior partitions, attic floors). This hybrid approach is what top contractors use to maximize both performance and margin.