Understanding the Costs of Spray Foam Insulation: A Comprehensive Guide (2024)

Understanding spray foam insulation cost gives an in-depth knowledge of all the parameters involved during costing. Many homeowners regard spray foam insulation as too expensive. On the contrary, it should be considered an investment rather than a home improvement procedure. The benefits of installing spray foam insulation make it a wise decision in the long run. 

In this comprehensive guide, we will discuss how much spray insulation costs and the factors that influence its cost. Furthermore, we will highlight how to calculate the cost of DIY spray foam insulation. Do you know that you can also claim tax credits for spray foam insulation? Join us as we unravel it all in this guide.

Understanding the Costs of Spray Foam Insulation

What Factors Determine the Cost of Spray Foam Insulation?

On average, spray foam insulation cost per square foot is $0.5 to $2.5 ($6000). However, estimating exactly how much spray foam insulation cost is dependent on several factors. Some of these factors include thickness, type of spray foam, R-value, project size, and location of insulation.

Type of Spray Foam and Thickness

The thickness and type of spray foam used significantly affect the installation cost. Open-cell and closed-cell are the two common types of spray foam insulation. In terms of costs, open-cell spray foam is less expensive than closed-cell spray foam because it is water-permeable, less dense, and offers a lower R-value. On the other hand, closed-cell spray foam is expensive because it offers better thermal insulation, superior moisture resistance, and higher density.

Spray insulation thickness is proportional to its R-value. Thus, thicker insulation offers a higher R-value, meaning a higher spray foam insulation cost. Open-cell spray foam offers an R-value of R3.5 per inch thickness while closed-cell spray foam insulation R-value is between R5.6 to R7. This means applying thicker insulation is expensive as it requires more materials to cover a given area.

The Role of Project Size and Home Location in Cost Calculation

The project size and location also contribute to spray foam cost calculation. The size of the insulation project is usually measured in square footage. Typically, a larger coverage means more insulation. Using open-cell spray foam, the attic spray foam insulation cost is between $400 - $700 for 1000 square feet; closed-cell spray foam costs between $1000 - $1500 for the same project size.

Spray foam insulation cost is affected by location, as different areas in a house require different thicknesses and R-values. The complexity of location is another factor that affects the cost of insulation. For instance, accessible areas like wall insulation are cheaper to install than hard-to-reach locations.

Calculating DIY Spray Foam Insulation Costs: A Real-World Example

Expensive labor costs make many homeowners shy away from home insulation. DIY Spray foam insulation provides a cost-effective option to carry out home insulation without breaking the bank.

To calculate DIY spray insulation cost, we review the recommended R-value for different areas of a building located in Zone 3. The recommended R-values for Zone 3 vary across different home locations. That said, an increase in R-value means an increase in spray foam insulation thickness. It is important to know that the project's size significantly influences insulation cost.

Spray Foam Insulation Cost

Detailed Analysis of Closed Cell Insulation Costs for Homeowners

The closed-cell cost listings provided in the table below are calculated based on the average current prices of SPRAYMAN Thermal & Sound Insulation Spray Foam, excluding any potential discounts or special offers. The cost estimation in the table is for the DIY spray foam insulation project scope and does not include labor costs. These cost estimations are intended to assist in your decision-making process.

  Uninsul. Attic Uninsul. Floor Crawl Space Basement Wall
Rec. R-Value R49–R60 R19 R13 - R25 R11
Needed Thickness (inches) 8.7 - 10.6 3.4 2.3 - 4.5 2
Cost (50 sq.ft.) $430 - $470 $225 $155 - $215 $120
Cost (100 sq.ft.) $780-960 $350 $215 - $400 $190
Cost (200 sq.ft.) $1480 - $1780 $590 $400 - $840 $390
Cost (500 sq.ft.) $3680 - $4460 $1420 $980 - $1980 $850
Cost (1000 sq.ft.) $7340 - $8930 $2850 $2000 - $4000 $1700

Tools and Resources for Accurate DIY Cost Estimation

The cost estimations provided above are for illustrative purposes. It is important to understand that R-value requirements vary with climate zone. Thickness, existing insulation material, and the type of spray foam applied contribute to the R-value. However, due to their variability, these variables were not included in the calculations.

Calculate the R-value using this free online tool. Then, subtract the calculated R-value from the recommended R-value. Next, use the Sprayman Spray Foam Insulation Calculator to determine your total cost accurately. The spray foam insulation cost may be lower than the estimated costs mentioned above. Consult our spray foam insulation experts for personalized advice on cost-effective insulation solutions.

What Factors Influence the Cost of Professional Spray Foam Insulation?

Professional spray foam insulation is expensive when labor costs are involved. On average, spray foam companies charge between $1500 to $4500 as labor costs. As mentioned earlier, different factors influence spray foam insulation costs. Before taking up a new project, here are some of the factors professional spray foam contractors carefully consider;

Accessibility of Location

Professional contractors evaluate the area to be insulated when calculating costs. Difficulty in navigating regions requires more attention, time, materials, and labor. Examples of such areas are crawl space and attic insulation.

The cost of attic insulation is considered the most expensive because it is difficult to access and demands thick insulation. Insulating hard-to-reach areas is usually more expensive than insulation in accessible locations. For instance, the cost to insulate a crawl space is expensive compared to wall insulation.

New Home vs Old Home

Generally, spray foam insulation in existing walls is expensive. Insulating an old home requires additional services that hike insulation costs. Existing insulation and structures must be removed before new insulation is installed. For instance, removing old insulation costs between $1 and $2 per sq ft.

Additional Services

Proper spray foam insulation requires several additional services essential for an effective thermal barrier. These services affect the final spray foam insulation cost. These services include vapor barrier installation, spray foam insulation removal, etc.

What Is The Cost of Hiring Professionals For Spray Foam Insulation?

Professional contractors provide effective home insulation installation. However, the cost for home insulation using experienced professionals is higher than DIY spray foam insulation. On average, home insulation cost of hiring a professional is between $0.5 to $2.5 per sq ft.

The table below shows the labor costs of hiring professionals for house insulation. However, variable factors such as insulation material costs, accessibility, additional services, new home insulation, etc, are not considered in this cost estimation. 

  Cost (1000 sq. ft.)
Uninsulated Attic $1700 - $5070
Uninsulated Floor $1000 - $3000
Crawl Space $1,070 - $6170
Basement Wall $1875 - $6050

DIY vs. Professional Spray Foam Installation: What's Best For Your Budget?

DIY spray foam insulation is a budget-friendly option for home insulation. Homeowners often fear the high labor costs associated with professional spray foam installation. Labor costs as high as $0.5 to $2.5 per sq ft. In comparison, DIY spray foam installation eliminates labor costs while equipping you with valuable skills.

Spray foam insulation kit make DIY spray foam insulation easier and less expensive to attempt. Foam insulation kits cost between $200 - $800 and include items such as a spray foam gun, protective gear, spray foam product, spray foam cleaner, etc.

What Are The Long-Term Benefits Of Spray Foam Insulation: Is It Worth It?

Spray foam insulation is worth every single penny spent on installing it. It offers superior thermal insulation than other types of insulation by creating an air seal. Here are the long-term benefits of spray foam insulation:

Benefits of Spray Foam Insulation

Energy Savings:

Spray foam insulation reduces energy consumption in buildings by 30%. It creates an airtight environment, thereby reducing the HVAC system's air filtration and energy consumption. 


    Spray foam insulation maintains an optimal temperature in the building all year. In addition, spray foam improves indoor air quality in buildings by blocking out bad air, allergens, dust, and other pollutants. 

    Moisture Resistance:

    Moisture is the biggest energy source of insulation; it gradually reduces its effectiveness. Closed-spray foam insulation is waterproof and prevents water from passing through it. Moisture-resistant insulation prevents mold problems and also improves the durability of spray foam. 

    Sound Insulation: 

    Spray foam provides sound insulation in buildings by absorbing sound waves. By creating an airtight environment, spray foam blocks out noises from outside, making foam insulation beneficial for buildings in noisy environments.


    Spray foam is highly durable and can last for decades without replacement or losing its effectiveness. Unlike other types of insulation, spray foam insulation can stay efficient for up to 80 years.

    Increased Home Value: 

    Spray foam is dense and adds to a building's structural strength. In addition, it provides moisture resistance and improves air quality, which increases a building's market value. All these attributes help to increase the value of an insulated building.

    How Can You Lower the Costs of Spray Foam Insulation?

    Reducing the costs of spray foam insulation involves smart planning and understanding available resources and techniques. Here are effective ways to cut down expenses without compromising on quality:

    • Insulate During Construction: Install insulation during the initial construction phase to avoid the need for costly removals and replacements later. This strategy not only lowers the upfront costs but also reduces future maintenance expenses.
    • Consider DIY Spray Foam Insulation for Cost Savings: By handling the insulation job yourself, you can save substantially compared to professional installation costs. Products like 'spray foam insulation in a can' are designed for easy use, making them ideal for DIY projects. This approach is not just budget-friendly but also allows for personal control over the project timeline and quality.
    • Shop Around for Contractors: Don’t commit to the first installer you talk to. Instead, solicit and compare multiple quotes. This will help you secure the best price and the highest quality of service, ensuring cost-efficiency and effective installation.
    • Utilize Tax Credits for Energy Efficiency: Take advantage of financial incentives such as the Energy-Efficient Home Improvement Credit, which offers a 30% tax credit on installation costs of qualifying improvements, with a maximum claim of $1200 annually. The U.S. government has structured these credits to encourage homeowners to invest in energy-efficient upgrades, further supported by an additional $2000 tax credit available for properties with energy-efficient heat pumps.

    These strategies not only reduce the immediate spray foam insulation cost but also contribute to long-term savings through enhanced energy efficiency, increased property value, and a lower environmental footprint.

    FAQ - Expand Your Knowledge on Spray Foam Insulation

    What Are the Different Types of Spray Foam Insulation?

    There are two distinct types of spray foam insulation; closed-cell and open-cell spray foam insulation. Learn more about the specific types of spray foam insulation, including open-cell and closed-cell options, in our detailed comparison guide on "Find Your Ideal Type of Spray Foam Insulation: Open vs. Closed Cell Explained."

    What Is R-Value?

    R-value is a number that depicts the thermal resistance of an insulating material. It is a measure of how well an insulating material resists heat transfer. For a comprehensive exploration about R-value, visit our detailed guide on "Understanding the Importance of R-Value in Spray Foam Insulation."

    Why Are Attics and Roofs Ideal for Spray Foam Insulation?

    Spray foam attic insulation is a profound solution for the unbearable heat and high energy bills you experience in your home. Learn more about how spray foam insulation can transform your attic by checking out our detailed guide on "Why Are Attics and Roofs Ideal for Spray Foam Insulation?"

    Back to blog