When Indiana homeowners start planning an insulation upgrade, one of the first questions is cost. Spray foam pricing varies depending on materials, depth and difficulty, but most homes in the region fall within a fairly predictable range. 

In Indiana, professional installation of spray foam insulation typically costs between $1.50 and $3.50 per square foot, including both materials and labor. State cost reports show an average around $1.77 per square foot, meaning a 1,000-square-foot project usually runs between $1,500 and $3,500, depending on the type of foam and job complexity. These estimates apply to new applications and do not include insulation removal or structural repair. 

For easy comparison, here’s how the same 1,000-square-foot project might vary: 

• Open-cell foam in an easy attic: around $1,800–$3,000 

• Closed-cell foam in a moderately complex space: around $3,750–$6,000 

• Average Indiana project at $1.77 per sq. ft.: about $1,770 total 

Each situation depends on foam type, access to the work area, and required thickness/R-value. Costs rise if old insulation must be removed. 

What Affects the Price of Spray Foam Insulation 

Type of Foam 

The biggest factor is whether you choose open-cell or closed-cell spray foam. Open-cell foam is lighter, softer and more affordable, while closed-cell foam is denser, moisture-resistant and offers nearly twice the R-value per inch. In Indiana, open-cell foam often falls on the lower end of the price range, while closed-cell can approach $3.00 or more per square foot. The trade-off is performance; closed-cell creates a stronger air and moisture barrier, making it ideal for basements, crawl spaces and metal buildings. 

Desired Thickness 

Thickness directly impacts price. A 3-inch application uses half the material of a 6-inch application, so the deeper the foam, the higher the cost. Homes targeting higher R-values for attics or exterior walls typically need thicker foam, which can push pricing toward the upper end of the range. 

Access and Complexity 

The more difficult it is to reach a space, the more time and material it requires. Tight attic trusses, sloped ceilings and areas behind ductwork increase labor. A straightforward attic or wall cavity costs less than a complex retrofit. The goal is even coverage across every surface, something only a trained crew can verify during application. 

Preparation and Existing Conditions 

If existing insulation is old, dirty or damp, it must be removed before spraying new foam. That process adds time and disposal costs. Professional removal ensures the foam bonds properly to clean, dry surfaces. Advanced Seal Indiana offers both removal and installation services, simplifying the process from start to finish. Learn more on our page for insulation removal services. 

Local Building Codes and Safety Requirements 

Indiana building codes require spray foam insulation to be protected with an approved thermal or ignition barrier in certain areas. Applying an intumescent coating or drywall adds to the total project cost but ensures fire safety compliance. Professional installers handle these details so the system meets or exceeds code. 

Getting an Accurate Spray Foam Quote 

Every home’s structure and goals are unique, so professional evaluation is the only way to get an exact price. A trained contractor will calculate board feet, confirm moisture conditions and design a solution that meets code. At Advanced Seal Indiana, we evaluate each project in detail, ensuring performance, safety and lasting value. 

If you’re ready for precise pricing and expert application, reach out through our contact page to schedule your estimate. We proudly serve communities throughout Indiana.