Spray foam insulation and air sealing are among the most effective ways to improve your home's energy efficiency, comfort, and indoor air quality. Whether you're insulating an attic, sealing a crawl space, retrofitting walls, or upgrading a garage, pricing depends on several factors including the size of your project, foam type (closed cell or open cell), accessibility, and your home's current condition. At Indianapolis Spray Foam Insulation, we believe in transparent pricing and honest estimates so you know exactly what to expect.
Pricing guide
These rates are indicative. Every job is unique: size, access, complexity. Request a free estimate for exact pricing tailored to your situation.
| Service | Price | Details |
|---|---|---|
| Attic Spray Foam Insulation | From $1.50/sq ft | Open-cell foam on the roof deck turns an Indianapolis attic into conditioned space, from 140°F July to sub-zero January. The ductwork ends up inside the envelope. Every estimate lists the R-value target; the thickness per pass; the board footage. |
| Closed Cell Spray Foam Insulation | From $1.20/board ft | Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder and real structural stiffening. The right product for crawl space walls; basement rims; pole barns and any Indianapolis wall that has to survive a sub-zero January and a humid August. |
| Open Cell Spray Foam Insulation | From $0.55/board ft | Half-pound open-cell foam air-seals attics and walls at a friendlier price per board foot. Sound dampening between rooms and the two halves of a double comes with it. We say where it belongs, and where a crawl space calls for closed cell. |
| Wall & Injection Foam Insulation | From $2/sq ft | Injection foam fills closed walls through small drilled ports, no demolition. The retrofit answer for Indianapolis frame cottages; balloon-framed doubles and post-war ranches with empty cavities. Ports go under a siding course or along a mortar joint and are patched to match. |
| Crawl Space Spray Foam Insulation | From $2,500 | Closed-cell foam on crawl space walls and rims stops cold floors and frozen pipes in Indianapolis homes. Ranches; Cape Cods and newer suburban two-stories sit on them. Moisture gets fixed first, we never spray over a wet crawl space. |
| Rim Joist & Band Joist Spray Foam | From $650 | Basement and crawl space rim joists leak more cold air than almost anything in an Indianapolis house. Closed cell seals every bay along the top of the foundation, the small-ticket job with the fastest comfort payback. Cantilevers get the same treatment. |
| Garage Spray Foam Insulation | From $1,200 | Garage ceilings under bonus rooms and shared walls are foam-sealed against July heat and sub-zero nights. Workshop conversions are handled the same way. The difference between a storage box and usable space twelve months a year. |
| Metal Building & Barndominium Spray Foam | From $1.75/sq ft | Closed-cell foam stops an Indiana pole barn from sweating in spring and frosting inside in winter. Post-frame shops; barndominiums; machine sheds and steel buildings sealed against condensation from Boone County farms to Plainfield warehouses. |
| Commercial & New Construction Spray Foam | Free commercial estimate | Warehouses; offices; churches and production builders served on schedule. Code-compliant assemblies come with documentation your local building inspector will actually accept. Phased work keeps your operation running from the Plainfield logistics corridor to Whitestown. |
| Insulation Removal | From $950 | Old blown-in and batts vacuumed out before any new foam goes in, never buried. We also cut out failed spray foam; the job most installers will not touch. Vermiculite turns up in older Indianapolis attics and gets flagged for testing; never disturbed. |
| Insulation Replacement & Re-Insulation | From $2,800 | The full reset: old material removed; gaps air-sealed; new foam installed to current code R-values. The right call when insulation is flattened; mouse-fouled; soaked by an ice dam leak or simply twenty years past its job. |
| Air Sealing | From $650 | Top plates, can lights, chimney chases and attic hatches leak more heated air than most walls. That warm leak is what builds ice dams. We seal them before insulating, the cheapest comfort fix in Indianapolis. |
What Affects the Price
- Project Size and Square Footage : Larger projects typically cost less per square foot due to efficiency and material volume discounts. A 500 sq ft attic will have a different per-unit cost than a 2,000 sq ft application.
- Foam Type (Closed Cell vs. Open Cell) : Closed cell foam provides superior insulation value and moisture resistance, commanding a higher price per board foot ($1.20+). Open cell foam is more affordable ($0.55+) and works well for interior applications where moisture control is less critical.
- Accessibility and Home Condition : Hard-to-reach attics, tight crawl spaces, or homes requiring insulation removal first will increase labor time and costs. Structural obstacles and ventilation requirements also affect the final price.
- Project Scope and Complexity : Simple attic insulation costs less than multi-area projects combining rim joists, crawl spaces, and air sealing. Commercial or new construction projects may require custom estimates based on building specifications.
What's included
- Travel included across the Indianapolis area
- Professional labor & equipment
- Old insulation vacuumed out, bagged & hauled away
- Job site cleanup
- Written estimate before work begins
To get an accurate estimate, prepare a list of areas you want insulated (attic, crawl space, walls, garage, etc.) and note any existing insulation or damage. Have your home's square footage and ceiling height available if possible. Call Indianapolis Spray Foam Insulation at (463) 285-8584 to schedule a free, no-obligation inspection and estimate. Our team will assess your home in person and provide a detailed quote based on your specific needs and budget.
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Indicative ranges only. Final pricing depends on the thickness and R-value specified, what has to come out first, access, and whether open or closed cell is the right product. Measured on site at the board foot. Minimum job charges apply on small jobs.
Pricing FAQ
Why do spray foam insulation prices vary so much between different contractors?
Quality, experience, and material sourcing vary significantly. Some contractors cut corners with lower-grade foam or incomplete application. Indianapolis Spray Foam Insulation uses premium materials and certified technicians to ensure your investment delivers lasting energy savings and comfort. Cheaper quotes often mean compromised results.
What is included in your free estimate?
Our free estimate includes a thorough inspection of your attic, crawl space, walls, or other target areas, assessment of current insulation and air leaks, recommendations for foam type and coverage, and a detailed written quote. Call (463) 285-8584 to schedule yours today.
Do you offer financing or payment plans for larger projects?
Yes, we work with homeowners on larger insulation and air sealing projects. Discuss your budget and financing needs when you call for your estimate at (463) 285-8584. We're happy to explore options that make your project affordable.
Is there a minimum project cost?
Our minimum projects start around $650 for air sealing or rim joist work. Larger projects like full attic insulation, crawl space encapsulation, or multi-area applications typically begin at $2,500 and up, depending on scope and foam type.
What is the difference between closed cell and open cell foam pricing?
Closed cell foam costs $1.20+ per board foot and offers superior insulation (R-6 per inch), moisture resistance, and air sealing. Open cell foam is $0.55+ per board foot, provides R-3.5 per inch, and works well for interior walls and attics where moisture control is less critical. Your home's climate and application determine which is best.