Open-Cell Spray Foam in Zone 5 (Cool)
Open-Cell Spray Foam provides R-3.7 per inch of thickness at a material cost of $0.40 per square foot per R-value point. In Climate Zone 5 (Cool), with 6,500 HDD and 800 CDD, see the thickness and cost required for each building component below.
Specifications
Open-Cell Spray Foam Requirements by Component in Zone 5
The table below shows the DOE recommended R-value, required thickness of Open-Cell Spray Foam, material cost per square foot, and total material cost per 1,000 square feet for each building component in Climate Zone 5. Components where Open-Cell Spray Foam is specifically recommended are highlighted. Components where insulation is not required show "N/R" (not required).
| Component | Required R | Thickness | $/SqFt | $/1000 SqFt | Fits Cavity | Rec. |
|---|---|---|---|---|---|---|
| Attic | R-49 | 13.2" | $19.60 | $19,600 | Yes | - |
| Wall Cavity | R-13 | 3.5" | $5.20 | $5,200 | No | Yes |
| Wall Continuous (Exterior) | R-5 | 1.4" | $2.00 | $2,000 | Yes | - |
| Floor (Over Unconditioned Space) | R-25 | 6.8" | $10.00 | $10,000 | Yes | - |
| Basement Wall | R-10 | 2.7" | $4.00 | $4,000 | Yes | - |
| Crawlspace | R-10 | 2.7" | $4.00 | $4,000 | Yes | Yes |
| Cathedral Ceiling | R-38 | 10.3" | $15.20 | $15,200 | No | Yes |
| Garage Ceiling (Below Living Space) | R-30 | 8.1" | $12.00 | $12,000 | Yes | - |
Open-Cell Spray Foam in Zone 5 — Guidance
Open-Cell Spray Foam at R-3.7 per inch is a reliable and proven insulation material suitable for a range of applications. In Climate Zone 5 (Cool), the moderate R-value requirements provide flexibility in choosing between different insulation types based on your specific application and budget. Professional installation is required for this product, which adds labor costs but ensures proper application and rated performance. Ensure that Open-Cell Spray Foam is installed in a dry location protected from direct moisture exposure. For the specific R-value requirements in Zone 5, review the component comparison table above to see the thickness and cost for each building component.
States in Zone 5
These states include areas within Climate Zone 5 where the Open-Cell Spray Foam requirements shown above apply. Click any state for its complete insulation recommendations.