How Much Is Spray Insulation For An Attic

How Much Is Spray Insulation For An Attic?


Good question. Spray foam insulation for attics stands out for its superior air sealing and moisture barrier properties. However, one pressing question remains for many homeowners: How much is spray insulation for an attic? The price can fluctuate significantly, influenced by various factors. Let’s dive into what affects the price and how to determine if spray foam insulation is the right investment for your home.

Spray foam insulation is distinguished by its exceptional ability to seal air and act as a moisture barrier, making it an excellent choice for attic insulation.


Factors Influencing the Cost

Type of Spray Foam

Open-Cell vs. Closed-Cell: Open-cell foam is less dense and cheaper than closed-cell foam but offers a lower R-value per inch. While more expensive, closed-cell foam provides better insulation and moisture barrier properties.

Thickness and R-Value

The thickness of the spray foam and the desired R-value significantly impact the cost. Higher R-value requirements necessitate more material, increasing the price.

Size of the Attic

The overall cost is significantly influenced by the total square footage of your attic space, with larger attics requiring increased materials and labor.

Accessibility and Condition of the Attic

Difficult-to-access attics or those requiring prior repairs or preparation work can lead to higher costs.


Estimating the Cost

While prices vary based on the factors mentioned above, a rough estimate for spray foam insulation in an attic can range from $1,500 to $4,000 for average-sized homes. However, for larger homes or those requiring more extensive insulation, costs can exceed this range.

Open-Cell Foam: Generally, open-cell spray foam insulation costs between $0.44 to $0.65 per board foot.

Closed-Cell Foam: Closed-cell foam is pricier, ranging from $1 to $1.50 per board foot.

Note: A board foot is a measure of volume (12″ x 12″ x 1″).


Cost vs. Benefits

Energy Savings

Spray foam insulation can result in considerable energy savings due to its capacity to form an airtight seal, potentially offsetting the initial outlay over time.

Enhanced Comfort

By reducing air leaks, spray foam can help maintain consistent temperatures throughout your home, enhancing comfort.

Moisture Control

Particularly with closed-cell foam, the moisture barrier properties can prevent water damage and mold growth.


Key Takeaways

  • The cost of spray foam insulation for an attic varies based on the type of foam, the desired R-value, attic size, and specific challenges related to accessibility and condition.
  • Although the upfront cost might be greater than that of other insulation options, the long-term benefits of spray foam, including energy savings, improved comfort, and moisture management, can render it an economically sound decision over time.
  • Considering your specific needs and consulting with a professional can help determine the most cost-effective insulation strategy for your home.



How much is spray insulation for an attic? It’s a question with many variables, but understanding these factors can help you take the time to carefully evaluate if spray foam insulation is the appropriate choice for your home.

Remember, investing in quality insulation can lead to long-term savings and improved living conditions.



This blog post provides an overview and estimated cost range for spray foam insulation in attics. Prices can vary based on location, specific project requirements, and market conditions. For the most accurate estimate, it’s advisable to consult with professional insulation contractors who can assess your specific needs.


Interested in exploring spray foam insulation for your attic or have further questions? Call us today for more information and to get a customized quote tailored to your home’s specific requirements.