Re-insulating a house typically costs $2,000-$10,000, with many 2,000-square-foot homes landing near $5,000 for targeted attic, wall, or floor work. The final price depends on the areas treated, insulation type, existing material removal, access, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Whole-house re-insulation | $2,000 | $5,000 | $10,000 | Typical 2,000-sq-ft home; scope varies |
| Attic insulation | $1,000 | $2,500 | $5,000 | About 1,000 sq ft of attic floor |
| Exterior wall retrofit | $2,000 | $4,500 | $8,000 | Existing finished walls; blown-in fill |
| Crawl-space or floor insulation | $1,000 | $2,500 | $5,000 | Access and moisture conditions matter |
Typical re-insulation prices by house size and scope
A full project for a 1,500- to 2,500-square-foot house often costs $2,000-$10,000, or roughly $1-$5 per square foot of treated area. A partial retrofit limited to an accessible attic may cost $1-$3 per square foot, while finished-wall cavities can cost $2-$6 per square foot because installers must work through small access holes.
Many homeowners spend around $5,000 when the project covers an attic plus selected walls or floors, not every surface. These estimates assume standard fiberglass or cellulose, ordinary access, and no major repairs. Assumptions: typical U.S. home, standard materials, no hazardous-material abatement.
What attic, wall, and removal work add to a quote
Quotes may combine insulation, labor, equipment, and removal charges. The table gives common ranges; pricing is not additive in every job because contractors may bundle setup and labor.
| Quote component | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Fiberglass or cellulose | $0.50 | $1.25 | $2.50 | Per sq ft of material coverage |
| Installation labor | $0.75 | $1.75 | $3.50 | Per sq ft of treated area |
| Old insulation removal | $1.00 | $2.00 | $4.00 | Per sq ft, bagging and disposal |
| Air sealing and prep | $300 | $800 | $1,800 | Per home, scope dependent |
Removal, air sealing, and difficult access can change the invoice as much as the insulation material itself. Dense-pack wall work may require drilling and patching, while attic work can include moving stored items or protecting recessed lights and vents. Ask whether disposal, cleanup, and minor hole patching are included.
How R-value, attic depth, and wall access change pricing
Insulation quantity and job complexity drive the estimate. Increasing an attic from about R-19 to R-49 may require roughly 8-12 inches of additional blown-in material, depending on the existing product and its condition. A 1,000-square-foot attic with open access generally costs less than the same area with a low roof, tight eaves, or extensive obstructions.
Wall retrofits are usually pricier per square foot than open attic work because cavities are harder to reach. Dense-pack cellulose or fiberglass in finished walls commonly runs $2-$6 per square foot; brick, plaster, unusual framing, or blocked cavities can raise the quote. If insulation is wet, moldy, or pest-damaged, removal and repairs may be needed before new material goes in.
Labor hours and crew size for a retrofit job
A two-person crew may complete a straightforward 1,000-square-foot attic installation in 4-8 hours. A whole-house project involving attic, walls, and crawl space can take 1-3 days, especially when old insulation must be removed. Contractor labor rates commonly work out to $50-$100 per worker-hour, though many bids use a fixed project price.
For a labor-only estimate, multiply crew hours by the hourly rate, then add materials and disposal. Confirm whether the crew will air-seal penetrations, install baffles, and protect wiring or fixtures; those tasks affect both time and performance.
Why regional labor rates shift insulation estimates
Urban markets and high-cost coastal areas can run about 15%-35% above national midrange pricing, while some rural markets may be 5%-20% lower. These differences reflect wages, travel, contractor availability, and disposal fees—not just material prices. Cold-climate homes may need more attic coverage to reach local energy recommendations, adding material and labor.
Compare quotes for the same treated areas and target R-values rather than comparing totals alone. A low bid may exclude air sealing or old-material removal, while a higher bid may include both. Local utility incentives can also change the net expense; eligibility and program amounts vary, so verify them before signing a contract.
When removal, moisture repair, or code work raises the bill
Removing old insulation often adds $1-$4 per square foot, with higher charges when material is contaminated or difficult to bag and transport. Pest cleanup, mold remediation, damaged vapor barriers, and roof or plumbing leaks are separate repairs. A contractor should identify the source of moisture before covering affected areas with new insulation.
Get a separate line-item price for removal and any repair work before authorizing extra scope. Local permit rules differ, and simple insulation upgrades may not require a permit, but related electrical or structural work can trigger inspection or code requirements. Ask the contractor which permits, fees, and inspections are included.
Which insulation choices balance upfront and long-term price?
Fiberglass batts are often economical in open framing, while blown-in cellulose or fiberglass suits attic floors and many existing wall cavities. Spray foam can cost substantially more—often $2-$7 per board foot for closed-cell foam—and is usually selected for specific air-sealing or moisture-control needs rather than as the cheapest whole-house option.
Choose material by location and installation conditions, not by price per bag alone. A cheaper product may underperform if it leaves gaps or is installed at the wrong thickness. Ask for the proposed R-value, coverage area, and product type in writing so bids can be compared consistently.
How to lower the re-insulation price without cutting coverage
Prioritize the areas with the largest heat loss, often the attic, and request an energy assessment or professional inspection before expanding the scope. Clearing attic access and removing stored items can reduce labor time. Bundling attic and crawl-space work may also lower mobilization charges, though the savings depend on contractor scheduling.
Request at least three itemized quotes that separate insulation, labor, air sealing, removal, and repairs. Avoid paying for removal when existing insulation is clean, dry, and suitable to remain beneath new material. Compare the specified R-value and treated square footage, and skip upgrades that do not address a documented need.