Cost Breakdown for 1500 Sq Ft of Insulation
The cost to insulate 1500 square feet varies significantly by material type. Fiberglass batt insulation runs $750-$2,250 installed. Blown-in cellulose costs $900-$2,250. Open-cell spray foam ranges from $1,500-$3,750. And closed-cell spray foam, the premium option, costs $2,250-$5,250 for 1500 square feet.
These costs include both materials and professional installation labor. The actual price for your project may vary based on your location, the specific area being insulated (attic, walls, or crawl space), and accessibility. In the Franklin, TN area, BST Spray Foam of Franklin provides free estimates to give you accurate pricing for your specific situation.
Which Material Offers the Best Value?
While fiberglass is the cheapest option upfront, it doesn't necessarily offer the best value over time. Spray foam insulation's higher initial cost is offset by its superior performance — providing 30-50% greater energy savings compared to fiberglass. When you factor in spray foam's 80+ year lifespan versus fiberglass's 15-25 years, the long-term cost per year is often comparable or even lower.
For 1500 square feet of attic insulation in Tennessee, closed-cell spray foam typically provides the best return on investment. Homeowners report average annual energy savings of $600-$1,000, meaning the higher upfront cost is recovered within 3-5 years.
Getting Accurate Estimates
Online cost calculators provide general ranges, but every insulation project is unique. Factors like attic height, wall thickness, existing insulation condition, and air sealing needs all affect the final price. The best way to get an accurate estimate is to schedule an in-person assessment with a qualified insulation contractor.
BST Spray Foam of Franklin offers complimentary on-site estimates throughout Franklin, Brentwood, Nolensville, and Thompson's Station. Our team evaluates your specific conditions and provides detailed, transparent pricing so you can make an informed decision.