Open-cell spray foam expands to fill cavities completely, creating an effective air seal. It is softer and less expensive than closed-cell foam, making it ideal for interior applications and sound dampening.
Unit Price
$0.65
per sq ft (per inch)
Labor Cost
$0.50
per sq ft (per inch)
Durability
80
years lifespan
Sustainability
2/5
Below Average
Category: Insulation
Range: $0.40 – $1.00/sq ft (per inch)
Waste Factor: 3%
Avg Project: $3,200
Quick answer: Open-Cell Spray Foam cost in 2026
Open-Cell Spray Foam costs about $0.65 per sq ft (per inch) (typical range $0.40–$1.00) plus roughly $0.50 per sq ft (per inch) for installation labor, or about $1.15 per sq ft (per inch) installed. Order 3% extra for waste: 500 sq ft (per inch)s becomes 515 sq ft (per inch)s, about $335 in material and $585 installed. HammerIO planning estimates, a national baseline adjusted by regional factors on city and state pages.
Labor is priced by insulation workers: the BLS OEWS May 2025 median wage is $23.62/hr nationally, $29.68 in New York and $24.00 in Dallas. Last reviewed .
Estimate Open-Cell Spray Foam Cost Before You Order or Compare Bids
Step 1
Price Open-Cell Spray Foam by the right unit
Start with the measured quantity in sq ft (per inch)s, then compare the current unit range of $0.40 to $1.00 per sq ft (per inch).
Step 2
Add waste, labor, and install accessories
Apply the default 3% waste factor, then include labor, fasteners, trim, adhesives, delivery, rental tools, and other project-specific accessories.
Step 3
Use the result to check written bids
Compare the calculator result against supplier units and contractor line items, then verify code, permit, and site-condition assumptions before ordering.
Contractor Takeoff Notes
How to Budget Open-Cell Spray Foam Without Missing Hidden Costs
Open-Cell Spray Foam should be budgeted as a complete installed assembly, not only as a commodity unit price. Quantity, waste, labor, local supply, code requirements, and the accessories needed for installation drive the final project cost.
$118
sample total for 103 sq ft (per inch)s
Price drivers
+Unit price ranges from $0.40 to $1.00 per sq ft (per inch), with $0.65 as the national midpoint used in this calculator.
+Labor is modeled at $0.50 per sq ft (per inch), but local contractor rates and project access can move that number sharply.
+The default 3% waste factor covers typical cuts and field losses; complex layouts need a larger buffer.
Ordering checks
+Measure the installed quantity in sq ft (per inch)s before adding waste or accessories.
+Confirm grade, thickness, profile, warranty, and code requirements before comparing quotes.
Cost/Year = unit price divided by expected lifespan. Lower cost/year indicates better long-term value. Note: units may differ between materials.
Best Uses
Interior walls
Attic rafters
Soundproofing
New construction cavities
Material Details
Average Project Cost
$3,200
Typical project using this material
Sustainability Rating
Below Average, consider greener alternatives
Waste Factor
3%
Order 3% extra to account for cuts, breakage, and fitting
Open-Cell Spray Foam: Complete Buying Guide 2026
Open-cell spray foam expands to fill cavities completely, creating an effective air seal. It is softer and less expensive than closed-cell foam, making it ideal for interior applications and sound dampening. In 2026, open-cell spray foam prices average $0.65 per sq ft (per inch), with a typical range of $0.40 to $1.00 depending on your region, supplier relationships, and order quantity.
When budgeting for a project using open-cell spray foam, factor in approximately 3% additional material for waste, plus labor costs averaging $0.50 per sq ft (per inch) for professional installation. A typical project using this material runs approximately $3,200 including both materials and labor.
With an expected lifespan of 80 years, open-cell spray foam represents a cost of approximately $0.01 per sq ft (per inch) per year of service life. This exceptional longevity makes it one of the most cost-effective materials when measured over its full lifespan.
For searchers comparing bids, the key number is not only the shelf price. The installed cost for open-cell spray foam depends on accessory materials, waste, job access, minimum order size, delivery, regional labor rates, and whether the project needs permit or code-driven upgrades. This page combines the HammerIO material database with 2026 cost modeling, contractor takeoff assumptions, and public construction cost references.
Computed from this page's planning figures: material = quantity × (1 + 3% waste) × unit price; labor = quantity × $0.50 per sq ft (per inch). Delivery, fasteners, adhesives, rental tools and permits are extra.
Quantity needed
Order (+3% waste)
Material (low – typical – high)
Labor allowance
Installed (typical)
100 sq ft (per inch)s
103 sq ft (per inch)s
$41 – $67 – $103
$50
$117
500 sq ft (per inch)s
515 sq ft (per inch)s
$206 – $335 – $515
$250
$585
1,000 sq ft (per inch)s
1,030 sq ft (per inch)s
$412 – $670 – $1,030
$500
$1,170
HammerIO planning estimates (national baseline adjusted by regional factors). Verify permit requirements with your local building department.
Who Installs Open-Cell Spray Foam: Insulation workers Wages in the 10 Largest Metros
The $0.50 per sq ft (per inch) labor allowance is a national figure. To localize it, compare your metro's median wage for insulation workers, floor, ceiling, and wall with the U.S. median below and scale the allowance by the same ratio.
Insulation workers: median hourly wage, 10 largest U.S. metros vs. national (BLS OEWS May 2025)
Metro area
Median wage
vs. U.S. median
United States
$23.62/hr
baseline
New York, NY-NJ
$29.68/hr
+26%
Los Angeles, CA
$23.30/hr
-1%
Chicago, IL-IN
$28.29/hr
+20%
Dallas, TX
$24.00/hr
+2%
Houston, TX
$23.14/hr
-2%
Washington, DC-VA-MD-WV
$22.07/hr
-7%
Miami, FL
$23.30/hr
-1%
Philadelphia, PA-NJ-DE-MD
$24.19/hr
+2%
Atlanta, GA
$26.31/hr
+11%
Phoenix, AZ
$20.35/hr
-14%
Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (May 2025), median hourly wages. These are employee wages, not contractor billing rates, a contractor's quoted hourly rate adds overhead, insurance, equipment and profit on top of the wage. “, ” means BLS did not publish a metro estimate for that occupation. Occupation: Insulation Workers, Floor, Ceiling, and Wall (SOC 47-2131).
New York, NY-NJ insulation workers earn a median $29.68/hr (+26% vs. the $23.62 U.S. median) while Phoenix, AZ is $20.35/hr (-14%). For a 500-sq ft (per inch) job that moves the $250 national labor allowance to roughly $215 in Phoenix, AZ and $314 in New York, NY-NJ, before contractor overhead and profit. See the state construction cost pages for statewide figures.
Methodology & Data Sources: Open-Cell Spray Foam Cost Data
How we calculate Open-Cell Spray Foam costs: Our pricing model combines the HammerIO material database (planning estimates, a national baseline adjusted by regional factors on city and state pages), U.S. Bureau of Labor Statistics OEWS May 2025 trade wages for the labor allowance, EPA Environmentally Preferable Purchasing guidance for sustainability ratings, DOE Building Technologies Office benchmarks for energy-related materials, and contractor takeoff assumptions. Unit prices are reviewed quarterly and cross-checked against common supplier ranges where available.
Unit price ($0.65/sq ft (per inch)): National midpoint estimate for mid-market grade materials sourced through standard supply channels.
Average project cost ($3,200): Derived from material quantity, labor allowance, waste, and typical residential/light commercial installation assumptions.
Waste factor (3%): Per NAHB (National Association of Home Builders) construction waste estimation guidelines, accounting for cuts, breakage, and field adjustments.
Durability (80 years): HammerIO planning estimate based on typical manufacturer warranty periods and expected service life for the material class under normal residential use.
Sustainability rating (2/5): Composite score from EPA Environmentally Preferable Purchasing criteria, including embodied carbon, recyclability, and VOC emissions per LEED v4.1 thresholds.
Disclaimer: Construction material prices vary significantly by region, supplier, project volume, and market conditions. The figures shown represent national averages and should be used for budgeting and comparison purposes only. Always obtain local contractor quotes before committing to a project budget.
Reviewed by Rowan Ashby · Last updated September 17, 2026 · Pricing sourced from the HammerIO 2026 material database (planning estimates), BLS OEWS May 2025 trade wages, public agency guidance, and contractor takeoff assumptions
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Open-Cell Spray Foam costs an average of $0.65 per sq ft (per inch) in 2026. Prices range from $0.40 to $1.00 per sq ft (per inch) depending on your location, supplier, and quantity purchased. A typical project using open-cell spray foam costs approximately $3,200.
How long does open-cell spray foam last?
Open-Cell Spray Foam has an expected lifespan of approximately 80 years when properly installed and maintained. Actual durability depends on climate exposure, installation quality, and maintenance practices. This is considered a very long-lasting material that often outlasts the building itself.
What is open-cell spray foam used for?
Open-Cell Spray Foam is commonly used for Interior walls, Attic rafters, Soundproofing, New construction cavities. It falls in the Insulation category of construction materials. Open-cell spray foam expands to fill cavities completely, creating an effective air seal. It is softer and less expensive than closed-cell foam, making it ideal for interior applications and sound dampening.
How much waste should I plan for with open-cell spray foam?
Plan for approximately 3% waste when ordering open-cell spray foam. For a project requiring 100 sq ft (per inch)s of material, you should order 103 sq ft (per inch)s to account for cuts, breakage, and fitting. Waste factors vary by project complexity and installer experience.
What are alternatives to open-cell spray foam?
Common alternatives to Open-Cell Spray Foam include Closed-Cell Spray Foam, Fiberglass Batt Insulation, Blown-In Cellulose Insulation. Each alternative offers different trade-offs in terms of cost, durability, and performance. Closed-Cell Spray Foam costs $1.80 per sq ft (per inch) and lasts approximately 80 years.
Is open-cell spray foam sustainable?
Open-Cell Spray Foam has a sustainability rating of 2 out of 5 (Below Average). This material has a higher environmental impact. Consider eco-friendly alternatives if sustainability is a priority for your project.
How much does 500 sq ft (per inch)s of open-cell spray foam cost installed?
Ordering 500 sq ft (per inch)s with the 3% waste factor means buying 515 sq ft (per inch)s: about $335 in material at the $0.65 planning price (range $206–$515), plus roughly $250 in installation labor at the $0.50 per sq ft (per inch) allowance, about $585 total before delivery, fasteners, adhesives and permits. These are HammerIO planning estimates (national baseline); regional factors and supplier quotes move the final number.
Who installs open-cell spray foam and what do they earn per hour in 2026?
Open-Cell Spray Foam is typically installed by insulation workers. The U.S. Bureau of Labor Statistics (OEWS, May 2025) reports a national median wage of $23.62 per hour for Insulation Workers, Floor, Ceiling, and Wall, ranging from $20.35 in Phoenix, AZ to $29.68 in New York, NY-NJ among the ten largest metros. Contractor billing rates run higher than the wage because they include overhead, insurance, equipment and profit, so use the metro-to-national ratio, not the wage itself, to adjust the labor allowance on this page.