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How Much Does Attic Insulation Cost?

Last Updated on September 26, 2024
Written by CPA Alec Pow | Content Reviewed by Certified CFA CFA Alexander Popinker

Installing attic insulation can help make your home more comfortable while reducing energy bills. But how much does attic insulation cost? In this guide, we’ll cover the important factors impacting attic insulation pricing so you can determine if it’s a smart investment.

We’ll look at material costs, installation labor rates, size considerations, and the return on investment from energy savings.

Article Highlights

  • Expect attic insulation costs between $0.40-$3.50 per sq ft depending on materials and installation.
  • Fiberglass and cellulose provide the most affordable options starting at $0.40 per sq ft.
  • Labor accounts for $1.50-$3 per sq ft for professional installation.
  • Proper insulation pays for itself within 2-5 years through energy savings.
  • Get multiple quotes to find the best balance of insulation quality and installation price for your home’s needs.

How Much Does Attic Insulation Cost?

Attic insulation costs anywhere between $500 and $4,500, depending on several factors, including whether you want to do it as a DIY project or hire an experienced professional for the job.

According to Angi, the average cost for attic insulation installation is around $2,500, with prices typically ranging from $1,700 to $2,100. This translates to about $1 to $4 per square foot. The total cost can be influenced by the type of insulation chosen, with blown-in insulation costing between $1 to $4 per square foot and spray foam insulation costing around $2 to $5 per square foot.

According to LawnStarter, attic insulation costs can range from $1,680 to $3,125, with a national average of approximately $2,380. They note that costs can vary significantly based on attic size and insulation material. For example, reflective insulation can be cheaper, costing around $0.50 to $1.50 per square foot, while structural insulated panels can be more expensive, ranging from $4 to $7 per square foot.

As highlighted by First American Roofing, homeowners can expect to pay between $1 and $7 per square foot for attic insulation. The total cost for insulating an average-sized attic might range from about $1,500 to $4,000, depending on labor costs and the complexity of the installation. Professional contractors typically charge between $70 and $80 per hour for their services.

According to an article by Bob Vila, typical costs for attic insulation installation range from $1,500 to $3,500, with an average cost of around $2,500. They emphasize that costs can vary based on factors such as attic size and ease of access. For larger attics (over 1,500 square feet), costs can escalate significantly, potentially reaching up to $10,500.

Lastly, as noted by McClelland’s Roofing, homeowners should budget around $2,500 on average for attic insulation. The highest end of the spectrum may reach up to $3,500, while lower-end projects could be as low as $1,500. The type of insulation selected will play a significant role in determining the final cost.

Let’s go over some of the factors that influence the total price to insulate your attic:

Type of Insulation Material

The type of insulation you use is the biggest cost factor. Popular attic insulation materials and price ranges:

  • Fiberglass batts or loose-fill – $0.40-$1.50 per square foot
  • Cellulose (blown-in) – $0.60-$2.30 per square foot
  • Spray foam – $1.50-$3.50 per square foot
  • Radiant barrier – $0.50-$1.50 per square foot

Fiberglass tends to be the most budget-friendly option, while spray foam provides superior insulation but at a higher cost.

Attic Insulation R-value

The R-value indicates the insulation’s thermal resistance and ability to slow heat transfer.

  • Recommended attic R-values range from R-30 to R-60 depending on climate.
  • Higher R-values mean more insulation material required, increasing costs.

Size of the Attic

Larger attics require more insulation material to cover the area, driving up costs.

  • Average attic sizes range from 500 to 1,000 square feet.
  • For a 1,000 sq ft attic with R-30 fiberglass insulation, estimated cost is $700-$1,500.

Professional Labor Costs

If hiring an insulation contractor, labor averages $1.50-$3 per square foot installed. This accounts for 30%-50% of the total project cost.

For DIY installation, you’ll save on labor but spend more time.

Types of Attic Insulation

Here’s a more detailed overview of popular attic insulation materials and typical price ranges:

Fiberglass Insulation

The most common and affordable option. It comes in batts fitted for joist cavities or loose-fill for blowing in.

  • Fiberglass batt installation – $0.40-$1.00 per sq ft
  • Blown-in fiberglass – $0.75-$1.50 per sq ft

Fiberglass provides good insulation value for the cost. It’s messy to install but straightforward for DIY.

Cellulose Insulation

This is made from recycled paper and blown in using special equipment.

  • Cellulose insulation cost – $0.60-$2.30 per sq ft

Cellulose is dense and fills gaps thoroughly. It provides great insulation for the price.

Spray Foam Insulation

Foam expands to fill every nook and prevent air leaks. Types include:

  • Open-cell spray foam – $1.50-$2.50 per sq ft
  • Closed-cell spray foam – $2.50-$3.50 per sq ft

Spray foam is the most expensive insulation option but blocks air infiltration well. It works for irregularly shaped attics.

Radiant Barrier

Foil panels installed in attics to reflect heat. Effective in hot climates.

  • Radiant barrier cost – $0.50-$1.50 per sq ft

Radiant barriers help reduce cooling costs and attic temperatures. They supplement other insulations.

Installation Cost Comparison

You can save money by insulating your attic yourself or pay a professional installer for convenience and expertise.

DIY Attic Insulation

  • $500-$1,500 range for materials and rental equipment to do it yourself, depending on the attic’s square footage and insulation used.
  • Fiberglass and cellulose are the easiest to DIY install. Spray foam requires proper spraying technique.
  • Requires tools like an insulation blower rental – $75 per day.

Professional Attic Insulation

Hiring a certified insulation contractor costs:

  • $1,500-$4,500 range for a typical attic depending on insulation chosen.
  • This includes materials, labor, and cleanup.
  • Pros handle the specialized equipment and messy installation process.

Energy Savings and ROI

You might also like our articles on the cost of attic ladder installation, mold remediation, or crawl space encapsulation.

Attic insulation significantly reduces heating and cooling costs by preventing conditioned air loss.

  • Well-insulated attics use up to 20% less energy. Most types of insulation pay for themselves in 2-5 years.
  • According to insulation expert Brad Lucas of Insulation Solutions, “With proper attic insulation, I typically see energy savings of 15-25% for homeowners.”
  • Payback period depends on insulation cost, energy rates in your area, and climate. Hotter and colder regions see faster payback.

Additional Costs to Factor In

Beyond the insulation itself, additional attic upgrades can improve effectiveness:

  • Air sealing – $350-$600 to plug leaks and gaps with caulk and weatherstripping before installing insulation.
  • Added ventilation – Installing attic fans or vents costs $150-$500 depending on the method. Proper ventilation prevents moisture buildup.
  • Insulation removal – If replacing old insulation, removal costs around $1-$2 per sq ft before installing new insulation.

Regional Cost Variations

Attic insulation costs vary across the country based on labor costs and climate:

  • The Northeast has the highest average insulation costs due to cold winters. Average cost to insulate a 1,000 sq ft attic around $1,600.
  • The South has the lowest prices, averaging $1,200 for a 1,000 sq ft attic given milder winters.
  • Prices range from $1,400-$1,500 on average for the Midwest and West.

Get local quotes since rates can vary within regions too.

Available Rebates and Tax Credits

Attic InsulationHere are some potential rebates and incentives to offset attic insulation costs:

  • Federal energy efficiency tax credits equal to 10% of insulation material costs, up to $500.
  • Utility company rebates – Many offer $100-$200 for air sealing and attic insulation.
  • State and local insulation rebates – Amounts vary but potentially $300-$500 in savings.

Determine the Insulation Type

Choosing the best insulation material involves considering:

  • Your regional climate – Vary insulation thickness and R-value to suit local conditions.
  • Budget – Fiberglass and cellulose offer affordability, while spray foam is premium.
  • Efficiency needs – Spray foam and radiant barriers provide maximum air sealing.

Get professional recommendations tailored to your attic’s specifics.

Answers to Common Questions

How much insulation is needed for a 1,000 sq ft attic?

For a 1,000 sq ft attic, R-30 to R-50 insulation is usually recommended, equaling 3-5 inches of fiberglass, cellulose, or other batt or loose-fill insulation. This costs $700-$2,000 installed depending on insulation type.

Is adding attic insulation worth the cost?

Yes, attic insulation is worth the investment for most homes. Proper insulation drastically reduces heat loss through the roof, lowering energy bills 15-25% on average. With energy savings, insulation pays for itself within 2-5 years.

What is the most cost effective attic insulation?

Fiberglass or cellulose are the most cost-effective types of insulation, starting around $0.40 per square foot. Though more expensive initially, spray foam lasts longer and provides the highest R-value per inch. Consider return on investment when choosing insulation.

What are the disadvantages of attic insulation?

Attic insulation costs more initially than no insulation. DIY installation can be messy, tiring work. Some materials like fiberglass can irritate skin and eyes during handling. Paying a professional adds labor costs but saves hassle and ensures proper installation.

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