2025 Spray Foam Insulation Cost | Open & Closed Cell

Spray foam insulation costs between $0.35 and $1.50 per board foot or $1.40 to $2.80 per square foot depending on the type. Most homeowners spend $2,400 to $3,000 for professional spray foam installation with prices ranging from $2400 to $8,000 depending on what needs insulating. Get free estimates from insulation contractors near you.

Spray Foam Insulation Cost

There are two types of spray foam insulation–open cell and closed cell. Open-cell spray foam costs $0.30 to $0.50 per board foot and closed-cell spray foam costs $1.30 to $1.40 per board foot. The average cost of spray foam insulation installation is $2,128 with most homeowners paying between $1,463 and $2,926. Pricing depends on how many parts of the home you wish to insulate and to what thickness.

SPRAY FOAM INSULATION COST
National Average Cost $2,600
Minimum Cost $2,600
Maximum Cost $8,000
Average Range $2,600 to $3,000

Spray foam is used in new construction and can also be applied to existing structures. The savings in your energy bills will be noticeable, with most people seeing savings of up to 40%. One of the biggest reasons to use it is for its air-sealing and moisture barrier properties. It expands to 40–100 times its original size, sealing every crack and crevice.

Proper insulation is the key to maintaining energy efficiency, cutting utility bills, and enhancing comfort in both residential and commercial properties. But with numerous insulation types to choose from—each with varying benefits, costs, and environmental impacts—what’s the best fit for your property?

In this post, we’ll break down the costs and features of the top four insulation types—foam, mineral wool, cellulose, and fiberglass. We’ll also cover expected trends for 2025, plus recommendations on how to choose the right insulation for your needs and budget.

Why Insulation Matters

Insulation minimizes heat transfer, keeping properties warm in winter and cool in summer. But beyond temperature control, good insulation improves soundproofing, reduces energy consumption, and ultimately reduces carbon footprints. Choosing the right insulation ensures that you achieve these benefits while balancing cost and environmental impact.

The Top 4 Insulation Types

1. Foam Insulation

Foam insulation, including spray foam and rigid foam board, is incredibly effective in sealing air gaps and achieving high R-values (insulation’s ability to resist heat flow).

Benefits of Foam Insulation:

  • High R-values: Provides optimal energy efficiency.
  • Air Sealing: Reduces drafts and improves overall insulation performance.
  • Durability: Lasts for decades without significant degradation.

Drawbacks and Environmental Concerns:

  • Greater environmental impact due to the extraction of natural gas and petroleum used in production.
  • Some manufacturing processes use chemicals that deplete ozone levels.

Cost in 2025: $1.30 – $1.40 per square foot for closed-cell spray foam and $0.30 – $0.50 for open-cell foam.

Foam insulation is typically more expensive upfront but offsets this with long-term energy savings and reduced heating/cooling costs.

2. Mineral Wool

Mineral wool is made from rock fibers or recycled industrial slag. It’s known for being robust, moisture-resistant, and fire-retardant.

Benefits of Mineral Wool:

  • Sustainability: Includes up to 90% recycled content.
  • Durability: Maintains efficiency even in moist or variable conditions.
  • Superior Fire Resistance: Ideal for areas requiring extra safety.

Drawbacks:

  • Higher cost compared to fiberglass or cellulose.
  • Contains phenol-formaldehyde in some products, potentially affecting indoor air quality.

Cost in 2025: $1.30 – $2.00 per square foot.

3. Fiberglass

Fiberglass is one of the most common insulation types due to its affordability and availability. Made from silica sand and recycled glass, it’s a practical choice for many property owners.

Benefits of Fiberglass:

  • Affordability: A cost-effective choice for large areas.
  • Versatile Formats: Available as batts, rolls, and loose-fill.
  • Sustainable Materials: Includes up to 40% recycled content.

Drawbacks and Safety Concerns:

  • Energy-intensive manufacturing process.
  • If improperly installed, can cause skin irritation or release fiberglass particles into the air.
  • Moisture infiltration can significantly reduce its effectiveness.

Cost in 2025: $0.70 – $1.90 per square foot for batts and rolls; loose-fill can cost slightly more, depending on installation.

Fiberglass is ideal for homeowners looking for an affordable, widely available insulation option.

4. Cellulose

Cellulose insulation is predominantly made from recycled newspaper, making it the most eco-friendly option.

Benefits of Cellulose:

  • High Recycled Content: 75% post-consumer recycled material.
  • Eco-Friendly Manufacturing: Minimal energy use compared to other insulation types.
  • Great Air Sealing: Particularly useful for wall cavities.

Drawbacks:

  • Susceptible to moisture, which can lead to mold and reduced R-value over time.
  • Requires proper installation to avoid settling.

Cost in 2025: $0.60 – $1.20 per square foot for loose-fill, blowing, or spray application.

Cellulose is a greener, cost-effective alternative, perfect for eco-conscious property owners.

Insulation Trends & Innovations in 2025

The demand for sustainable and energy-efficient solutions is driving innovation in the insulation industry. Here are some trends you can expect in 2025:

  • Green Materials: Increased use of plant-based or bio-friendly alternatives, such as sheep’s wool or hemp insulation.
  • Smart Insulation: Integration of sensors to monitor energy efficiency and detect potential issues (e.g., moisture infiltration).
  • Improved Recycling Technology: Manufacturers are focusing on methods to enhance recycled content percentages in insulation materials.
  • Focus on Low-VOC Products: Products designed to improve indoor air quality by reducing harmful emissions.

The shift toward eco-friendly and high-performance products will likely shape purchasing decisions for both residential and commercial users.

How to Choose the Right Insulation for Your Needs

Here are a few tips to help you decide on the best insulation type for your project:

  1. Evaluate R-Value Requirements

Determine the level of insulation needed for your climate. For colder regions, higher R-values (such as foam or high-density fiberglass) are ideal.

  1. Consider Your Budget

Fiberglass and cellulose are more budget-friendly options for large-scale projects, while foam and mineral wool offer better performance at higher costs.

  1. Think About Your Building’s Unique Needs

For soundproofing, mineral wool is a strong contender. If eco-friendliness is a priority, cellulose offers the least environmental impact.

  1. Check Local Building Codes

Ensure that the chosen insulation materials comply with the energy-efficiency standards in your area.

  1. Hire Professionals

Proper installation is key to maximizing insulation performance. Don’t compromise on quality—work with experienced teams to ensure the job is done right.

Real-Life Testimonials

“Spray foam insulation completely transformed the energy efficiency of our office building—our heating bill dropped by 40%!”

  • Rebecca T., Property Manager

“We went with cellulose insulation for our home renovation due to its eco-friendliness. It’s been a great choice for maintaining consistent indoor temperatures.”

  • Mark L., Homeowner

“Mineral wool insulation has been a game-changer for soundproofing our music studio. It’s incredible how much noise it blocks out.”

  • Alex G., Contractor