Homeowners typically pay for fiberglass insulation based on area, R-value, and installation method. The cost to install fiberglass insulation can vary with attic or wall space, labor rates, and material choices. This article breaks down the price ranges in USD and highlights the main cost drivers for fiberglass insulation cost.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed attic batt insulation | $1.00 | $1.50 | $2.00 | Per sq ft, typical R-38 to R-60 range |
| Installed wall batt insulation | $1.20 | $1.80 | $2.40 | Per sq ft, with standard 3.5–6.5 inch depth |
| Loose-fill attic insulation | $1.10 | $1.65 | $2.20 | Per sq ft, blown in; depth varies by target R-value |
| Materials only (bulk batt rolls) | $0.60 | $0.90 | $1.10 | Per sq ft material cost |
| Labor (installation) per hour | $40 | $60 | $80 | Varies by crew and region |
Fiberglass Insulation Cost By R-Value And Area
Typical total price for a standard three-bedroom home ranges from about $2,000 to $6,000 depending on attic and wall space, R-values, and whether refinishing is required. For a single-family 1,500–2,000 sq ft home, attic batt installation often lands around $1.20–$2.00 per sq ft installed, while walls can run $1.50–$2.40 per sq ft. Assumptions: Midwest labor rates, standard batt insulation, normal attic access, single-story home.
Per-unit price details
Per square foot installed is the most common metric. For each square foot of attic batt with a typical R-38 to R-60 target, expect roughly $1.20–$2.00 installed. For walls, $1.50–$2.40 per sq ft is common. If a home uses loose-fill attic insulation, price tends toward the $1.10–$2.20 per sq ft range, depending on crew efficiency and blower equipment.
Labor costs are a major driver; a small attic retrofit with a 2–3 person crew may take 4–8 hours, whereas larger or multi-room jobs can stretch to 1–2 days. Material savings are possible with standard batt insulation, but higher R-values and air-sealing will raise costs.
Major Cost Components In A Fiberglass Insulation Quote
| Component | Typical Range | Impact | Notes |
|---|---|---|---|
| Materials (batt or loose-fill) | $0.60–$1.10 per sq ft | Low to moderate | Depends on R-value and density |
| Labor and installation | $0.60–$0.90 per sq ft | Moderate | Waste disposal and air-sealing may add |
| Vapor barriers and accessories | $0.10–$0.30 per sq ft | Low | Moisture control adds cost but can prevent issues |
| Preparation and repair | $200–$1,000 total | Moderate | Removing old insulation or fixing leaks adds labor |
| Permits and inspections | $50–$300 | Low to moderate | Region-dependent requirements |
| Delivery or disposal | $0–$0.20 per sq ft | Low | Waste handling varies by project size |
Variables That Strongly Change The Final Quote
House size and attic height dramatically affect insulation depth and material quantity. For example, upgrading from R-13 to R-19 walls for a 1,600 sq ft home adds roughly 1,200–1,600 sq ft of batt material, shifting costs by $700–$1,600. The second driver is region and labor rates, with coastal markets often 10–25% higher than inland regions. If a job requires loose-fill in tight cavities or multiple stories, expect a steeper price due to specialized equipment and longer installation times.
How Access and Job Scope Shift The Price
Limited attic access or difficult crawlspaces can raise costs by 15–40% due to labor time and safety requirements. A single-story attic with easy access may stay near the lower end, while a two-story home with cathedral ceilings and complex framing will push toward the high end. Assumptions: standard equipment, normal access; exclusions apply for pest repair or structural work.
Regional Price Variations Across U.S. Markets
Coastal regions or areas with higher living costs typically report higher installed prices. For attic batt insulation, Midwest markets often show $1.10–$1.75 per sq ft, while West Coast markets can range $1.60–$2.20 per sq ft installed. Wall batt pricing follows a similar delta. Seasonal demand and contractor availability can add 5–15% in peak fall and winter months.
Material Options: Batt vs Loose-Fill And Their Pricing
Batt insulation is generally the most cost-efficient option, at about $0.60–$1.10 per sq ft in materials, plus installation. Loose-fill can be $0.10–$0.50 per sq ft more in material and requires blower equipment, which adds to labor and setup time. For retrofit walls, loose-fill is less common but can be used in retrofits behind existing siding when access is constrained. Assumptions: standard density; no specialty fire-rated blends.
Seasonal Price Changes And Scheduling Impact
Prices may move with demand, weather, and contractor availability. Scheduling a job in shoulder seasons can reduce labor surcharges, while urgent flips in winter may add 5–20% to the total. Advance planning helps lock in lower rates for material and crew time.
Quote-Driving Scenarios: Typical Projects And Their Costs
Scenario A: Attic batt insulation in a 1,400 sq ft attic with easy access, R-38 target. Installed price range: $1.20–$2.00 per sq ft for attic space. Scenario B: Wall batt insulation for a 1,600 sq ft home with partial re-siding and wind sealing. Installed price range: $1.50–$2.40 per sq ft. Scenario C: Loose-fill attic in a 1,800 sq ft home with tight rafter bays and crawlspace access challenges. Installed price range: $1.30–$2.20 per sq ft.
Three Real-World Quote Examples With Specs And Totals
Example 1: 1,400 sq ft attic batt, R-38, Midwest, easy access. Materials: $0.75 per sq ft; Labor: $0.70 per sq ft; Accessories: $0.15 per sq ft. Total installed: about $1.60–$2.10 per sq ft; total $2,240–$2,940.
Example 2: 1,600 sq ft wall batt, R-19, suburban Northeast. Materials: $1.00 per sq ft; Labor: $0.90 per sq ft; Permits: $150; Disposal: $0.05 per sq ft. Total: $1.95–$2.60 per sq ft; total $3,120–$4,160.
Example 3: 1,800 sq ft attic loose-fill, R-60, Sunbelt region. Materials: $1.20 per sq ft; Labor: $0.85 per sq ft; Equipment: $0.20 per sq ft. Total: $2.25–$2.90 per sq ft; total $4,050–$5,220.
| Region | Installed Price Range (per sq ft) | Typical Total Range | Notes |
|---|---|---|---|
| Midwest | $1.10–$1.75 | $2,200–$3,500 | Easy access; standard R-values |
| West Coast | $1.60–$2.20 | $3,200–$5,000 | Higher labor and material costs |
| Northeast | $1.50–$2.40 | $3,000–$4,800 | Walls and complex framing raise costs |