Blown Insulation Cost Guide 2026
Homeowners commonly pay for blown insulation based on attic or wall space, material choice, and labor. This cost guide explains typical price ranges and the main drivers that influence the final bill. The term cost is used to reflect the total project price and per unit pricing where relevant.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Attic Blown Insulation | $1,000 | $2,300 | $4,000 | Fiberglass or cellulose; 6–12 inches added depth |
| Wall Blown Insulation | $1,500 | $3,000 | $6,000 | Typically retrofits with blow-in cellulose or dense-pack fiberglass |
| Material Cost | $0.60-$1.20 | $0.90-$1.60 | $1.80 | Per board foot or per sq ft equivalent |
| Labor | $0.50-$1.25 | $1.00-$2.50 | $3.00 | Hours depend on space and access |
| Equipment & Tax | $0.10-$0.40 | $0.25-$0.75 | $1.20 | Machines, hoses, and local taxes |
| Total Project | $1,500 | $3,000 | $6,500 | Assumes installation in attic or select wall cavities |
Assumptions: region, scope attic or walls, insulation type and R value targets, crew size
Overview Of Costs
Typical cost range for blown insulation varies by space and material. In most U.S. homes, attic projects drive the majority of price due to area and access. Wall applications cost more per square foot because of retrofitting and penetrations. Per-unit estimates often appear as dollars per square foot or dollars per thousand board feet of material. The following provides total project ranges and per unit expectations with concise assumptions to help you plan.
Cost Breakdown
| Category | Low | Average | High | Notes | Assumptions |
|---|---|---|---|---|---|
| Materials | $0.40 | $0.90 | $1.60 | Fiberglass or cellulose; density differences | Attic or wall spaces; R value targets |
| Labor | $0.60 | $1.60 | $3.00 | Crew hours; access challenges | 10–16 hours typical; small retrofit less |
| Equipment | $0.10 | $0.30 | $1.00 | Blower machine and hoses | Rental or in-house gear |
| Permits | $0 | $50 | $300 | Local code requirements | Residential retrofit varies |
| Delivery/Disposal | $0 | $0.20 | $0.50 | Material handling | Waste bagging and cleanup |
| Warranty | $0 | $0.20 | $0.60 | Labor or material guarantee | One to two years typical |
| Overhead & Contingency | $0 | $0.60 | $1.50 | Admin costs and unknowns | Project uncertainties |
| Taxes | $0 | $0.20 | $0.60 | Sales tax | Depends on location |
Labor hours × hourly rate
What Drives Price
Key price factors include attic or wall scope, material choice, and access quality. Attics with complex joists, moisture concerns, or multiple ventilation baffles raise costs. Cellulose tends to be cheaper per sq ft than dense-pack fiberglass but may require more labor time for evenly distributed fill. Areas with limited attic access or high ceiling heights increase labor and time, pushing up the price. Per-unit pricing is common for both attic and wall projects, with $/sq ft and $/cardio inch references used by installers to quote.
Labor, Time And Install Time
Install time varies by space and crew efficiency. Typical attic projects take 6–12 hours for average homes, walls add complexity and can run longer. A smaller retrofit may be done in a day, while larger homes with multiple zones can span several days. The rate per hour often falls in the range of $60–$180 depending on local labor markets and crew skill.
Regional Price Differences
Prices differ across regions due to labor markets and material supply. In the Northeast urban areas, costs can be higher by around 10–15 percent compared with the national average; the Midwest often sits near the average; the West and Mountain regions may be 5–12 percent higher due to travel and logistics. Regional considerations influence both total and per-unit pricing.
Regional & Local Variations
Urban settings typically incur higher delivery and disposal fees, while rural areas may have lower labor rates but longer access times. Suburban markets usually land near the national average. The table below shows a rough delta by region without promising exact quotes.
Assumptions: market conditions and crew availability
Real World Pricing Examples
Three scenario cards illustrate realistic outcomes with distinct scopes and parts lists. Each includes hours, per-unit pricing, and totals to help set expectations.
Scenario 1: Basic Attic Fill — Attic space of 1,200 sq ft; fiberglass loose-fill; standard access; 8–10 hours; 1 crew. Material $0.75 per sq ft; Labor $1.50 per sq ft; Equipment and disposal modest. Total $2,000–$2,800.
Scenario 2: Mid-Range Attic and Partial Walls — Attic 1,800 sq ft plus 400 sq ft wall cavities; cellulose dense-pack in walls; good access; 12–16 hours; 2 crew. Material $1.00 per sq ft attic plus $2.50 per sq ft walls; Labor $2.00 per sq ft combined; Total $4,000–$6,000.
Scenario 3: Premium Whole-House Blend — Attic and extensive walls; high R targets; complex access and venting; use both cellulose and fiberglass; 20–28 hours; 3 crew. Material $1.50–$1.80 per sq ft; Labor $2.50–$3.50 per sq ft; Additional permits and cleanup. Total $8,000–$12,000.
Assumptions: region, specs, labor hours
Price By Region
Local market differences can shift totals by ±10–15 percent for attic projects and ±15–25 percent for wall retrofits. In coastal urban zones, higher disposal fees and permit costs can push totals upward compared with inland suburban markets.
Assumptions: region, project scope, and crew size