Spray Foam Insulation Cost
Spray foam insulation is one of the most effective ways to improve energy efficiency and air sealing in a home. But Many homeowners want to know how much money they can save if they make the investment. So we decided to make a page on our website to help answer that.
For a personalized estimate, our team at Mile High Centennial Insulation can evaluate your home and provide a free quote for Spray Foam Insulation Services.
Average cost per square foot for Spray Foam Installation in Denver, CO area.
Spray foam insulation costs vary depending on the type of foam and the thickness required.
Typical installation costs include:
• Open-cell spray foam:
$4 – $6 per square foot installed
• Closed-cell spray foam:
$6 – $9 per square foot installed
Closed-cell foam generally costs more because it provides a higher R-value and creates a stronger air and moisture barrier.
The final cost of spray foam insulation depends on the specific conditions of the home and the area being insulated.

Cost to Spray Foam an attic
One of the most common upgrades homeowners make is installing spray foam in the attic.
For many homes in Centennial, attic spray foam insulation typically costs between:
$3,000 – $8,000
The total cost depends on:
• Attic size
• Desired insulation thickness
• Whether open-cell or closed-cell foam is used
• Accessibility of the attic space
• Whether old insulation must be removed first
Homes with contaminated or deteriorated insulation may require Insulation Removal Services before new spray foam insulation is installed.
What factors affect the cost of spray foam insulation?
Several factors influence the cost of installing spray foam insulation.
Size of the Insulated Area
Larger areas require more material and installation time, which increases total project cost.
Type of
Spray Foam
Open-cell foam is generally more affordable, while closed-cell foam provides higher insulation performance and moisture resistance.
Insulation Thickness
The thickness of the foam layer determines the final R-value and overall insulation performance.
Accessibility of the Space
Attics or crawl spaces that are difficult to access may require additional labor.
Existing Insulation Condition
If old insulation is damaged or contaminated, professional
Insulation Removal Services may be required before installing new insulation.
Is spray foam insulation
worth the cost?
Although spray foam insulation has a higher upfront cost compared to traditional fiberglass insulation, many homeowners find it provides long-term value.
Benefits include:
• Improved energy efficiency
• Lower heating and cooling bills
• Reduced air leakage and drafts
• Better moisture protection
• Long lifespan compared to traditional insulation.
For homes in Colorado where temperatures vary significantly between seasons, spray foam insulation can greatly improve comfort and indoor temperature stability.
Open Cell vs Closed Cell Spray Foam Cost
Understanding the difference between open-cell and closed-cell foam can help homeowners decide which insulation option fits their budget and performance goals.
Open-Cell Spray Foam significantly and is often used for interior walls and attic applications. It provides good air sealing and sound reduction at a lower cost.
Closed-Cell Spray Foam is denser and provides higher R-value per inch. It is often used in crawl spaces, exterior walls, and areas where moisture resistance is important.
If you are unsure which option is best for your home, our Spray Foam Insulation Services team can evaluate your property and recommend the right insulation solution.
Spray Foam Insulation for
Homes in Centennial
Homes throughout Centennial and the surrounding Denver metro area benefit from spray foam insulation upgrades because the material helps prevent heat loss during winter and heat gain during summer.
Spray foam insulation can be installed in:
• Attics
• Crawl spaces
• Exterior walls
• Garages
• Basements
• New construction homes
Many homeowners also upgrade insulation throughout the home using Residential Insulation Services to maximize energy efficiency.
Get a Spray Foam
Insulation Estimate
Every home is different, and factors such as attic structure, insulation thickness, and existing insulation condition all affect final pricing. Sometimes we can reduce cost by using Spray Foam in the most critical areas, and using other types of insulation elsewhere.
The best thing to do is schedule free estimates from 2-3 reputable companies and compare strategies and quotes.
Call today and lets coordinate a time to come by for a quick walk through!
720-637-4759
