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How Much Does Attic Insulation Cost?

$1 - $5
cost per square foot installed
$1,000 - $4,000
average total cost to install
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Key Takeaways

  • Cost Range: Attic insulation costs typically range from $1,000 to $2,700.
  • Cost per Square Foot: The cost per square foot of attic insulation varies between $1 and $4.
  • Factors Influencing Cost: The type of insulation, attic size, and additional requirements like removal of old insulation can affect the total cost.
  • Types of Insulation: Various insulation types include batt and roll, blown-in, loose-fill, spray foam, and reflective insulation, each with different costs and properties.
  • Savings and Efficiency: Proper attic insulation can significantly reduce energy bills by maintaining temperature regulation.


At Renotag, we understand that upgrading your home’s insulation can be a crucial step towards energy efficiency and cost savings. In this guide, we will explore the costs associated with installing attic insulation, the factors that affect these costs, different types of insulation available, and additional considerations like insulation removal and sealing.

Attic Insulation Cost

Cost Per Square Foot Installed

The cost of attic insulation installation ranges from $1 to $4 per square foot. This range depends on the type of insulation material chosen and the complexity of the installation. For example, simpler batt insulation tends to be at the lower end, while spray foam insulation is at the higher end due to its superior insulating properties and installation complexity.

Average Total Cost to Install

Homeowners can expect to pay between $1,000 and $2,700 for a complete attic insulation project. This cost includes both the materials and labor. The total cost can vary widely based on the size of your attic and the type of insulation you choose.

Detailed Cost Breakdown

The cost of insulating an attic varies based on several factors, including the size of the space and the type of insulation material used. Here’s a detailed breakdown:

Attic Size (square feet)Average Cost Installed
500$500 – $2,000
700$700 – $2,800
1,000$1,000 – $4,000
1,200$1,200 – $4,800
1,500$1,500 – $6,000
2,000$2,000 – $8,000

Types of Attic Insulation and Costs

There are several types of insulation, each suited to different needs and budgets:

Batt and Roll Insulation

  • Cost per Square Foot: $0.80 – $2.60
  • Average Installed Cost: $1,100 – $3,900
  • Description: Consists of pre-cut panels of fiberglass or mineral wool. It is one of the easiest types to install, making it ideal for DIY projects.

Blown-In Insulation

  • Cost per Square Foot: $0.90 – $2.40
  • Average Installed Cost: $900 – $3,600
  • Description: Made from small particles of fiber, foam, or other materials. This type is blown into place with special equipment and is excellent for filling hard-to-reach spaces.

Loose-Fill Insulation

  • Cost per Square Foot: $1.00 – $2.50
  • Average Installed Cost: $1,100 – $3,800
  • Description: Similar to blown-in, loose-fill is ideal for spaces where it’s difficult to achieve uniform thickness with batts or rolls.

Spray Foam Insulation

  • Cost per Square Foot: $1.00 – $4.50
  • Average Installed Cost: $1,100 – $9,000
  • Description: Provides excellent air sealing properties. Higher initial costs but can lead to significant savings on energy bills due to its high efficiency.

Reflective Insulation

  • Cost per Square Foot: $0.50 – $2.20
  • Average Installed Cost: $550 – $3,300
  • Description: Reflects heat to provide a barrier against heat transfer, which is particularly useful in hot climates.

Cost Factors to Install or Replace Attic Insulation

The total cost of installing or replacing attic insulation can be influenced by several factors:

  • Type of Insulation: Different materials have different costs. Spray foam tends to be more expensive than batt insulation.
  • Attic Conditions: The presence of obstacles, the condition of existing insulation, and whether old insulation needs removal can all affect the cost.
  • Labor Costs: Depending on your location and the complexity of the installation, labor costs can vary significantly.

Attic Insulation FAQs

Can I Install Attic Insulation DIY?

Yes, some types of insulation, like batt and roll, are suitable for DIY if you have basic home improvement skills. However, materials like spray foam require professional installation.

How Much Will I Save by Adding Attic Insulation?

The savings can vary, but properly insulating your attic can reduce heating and cooling costs by up to 50%, depending on your current insulation and climate.

How Long Does Attic Insulation Last?

Most types of attic insulation can last 20 to 30 years or more if properly installed and undisturbed.

What is the Best Type of Insulation for an Attic?

The best type depends on your specific needs; spray foam offers high efficiency, while batts are cost-effective and easier to install.

How Many Inches Thick of Insulation in an Attic?

It is recommended to have between 10 and 14 inches of insulation, depending on the material’s R-value and your climate zone.

Getting Attic Insulation Estimates and Quotes

When considering attic insulation, it’s important to get multiple estimates from reputable contractors. Ensure they perform a thorough inspection of your attic and provide a detailed quote. Ask about their experience, the materials they use, and whether they offer a warranty on their work.

For further reading and to explore other home improvement costs, visit our Attic Insulation Cost Guide and other related resources.

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