How much does it cost to insulate or reinsulate an attic?

• <div>On average, insulating an attic costs about $2,500, with a typical range of $1,500 to $3,500. The final price often depends on the attic's size, with costs generally falling between $1 to $3 per square foot. For example, insulating a 1,800-square-foot attic would likely cost between $1,800 and $5,400.If the project involves removing old insulation, this can add an average of $900 to the total cost, bringing a full removal and reinsulation project to around $3,000.Several factors influence the overall cost:<ul><li>Insulation Type: Prices per square foot vary significantly by material.</li><li>Reflective: $0.50–$1.50</li><li>Blown-in: $1–$4</li><li>Batt: $2–$4</li><li>Loose-fill: $2–$5</li><li>Spray foam: $2–$5</li><li>Structural insulated panels (SIPs): $4–$7</li><li>Project Complexity: Factors like sealing air leaks, poor attic accessibility, and required inspections can add to the cost.</li><li>Removal Issues: The discovery of mold, asbestos, or pests during the removal of old insulation can substantially increase the price.</li></ul></div>

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Last update on September 30, 2025

Reviewed in September 2025
These guys were professional. The installed the EV charger with quickness and efficiency.
EC Electric LLC
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Reviewed in January 2024
I am grateful for the excellent work and advice provided by Matt. He installed security cameras, fixed some problems with parts, installed and even helped me choose and buy indoor and outdoor lighting, found and fixed some faulty installations. He was kind, professional, communicative and...
Granny Electric
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Reviewed in September 2023
They installed the fence quickly and scheduled it in a timely manner
Los Angeles Fencing Co.
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Reviewed in April 2023
Luis was our installer and did a great job on installing the new windows, as well there was some wood damage which he fixed. One window was the wrong size he contacted the office and was out the next day to remove and put in the new window. I highly recommend Vinal Windows and Luis to install...
Vinyl Window Broker, Inc.
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Reviewed in July 2022
My A.C. installation went great with the team from N.R.G. From the initial consultation to the end of installation, these guys were great to work with.
N.R.G Heating and Air Conditioning, Inc.
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Reviewed in May 2022
If you’re looking for stunning window designs and a great experience with the crew who installs them, Reliable Roofing is a perfect choice. I was really happy with how my windows turned out, and the team that installed them were top-notch.
Reliable Roofing Company
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Reviewed in April 2022
I still have to install the new lovk
Watts Welding and Fabrication
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Reviewed in March 2022
Everything went well, installation was done quicker than quoted.
Insulation Labs
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Reviewed in January 2022
Christopher was a knowledgeable technician and did a great install for me.
Anthony Christopher Mechanical Inc
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Reviewed in October 2021
Excellent customer service skills, detailed evaluation and terrific installation !
MR Garage Door Repairs
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Doorbell Installation questions, answered by experts

On average, insulating an attic costs about $2,500, with a typical range of $1,500 to $3,500. The final price often depends on the attic's size, with costs generally falling between $1 to $3 per square foot. For example, insulating a 1,800-square-foot attic would likely cost between $1,800 and $5,400.

If the project involves removing old insulation, this can add an average of $900 to the total cost, bringing a full removal and reinsulation project to around $3,000.

Several factors influence the overall cost:

Insulation Type: Prices per square foot vary significantly by material.
Reflective: $0.50–$1.50
Blown-in: $1–$4
Batt: $2–$4
Loose-fill: $2–$5
Spray foam: $2–$5
Structural insulated panels (SIPs): $4–$7
Project Complexity: Factors like sealing air leaks, poor attic accessibility, and required inspections can add to the cost.
Removal Issues: The discovery of mold, asbestos, or pests during the removal of old insulation can substantially increase the price.

Periodic checks for moisture or pest issues ensure consistent performance.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

Open-cell foam insulation has a life span ranging between 15 to 25 years when well cared for. However, the material may degrade sooner in areas with high humidity or after prolonged water exposure. Proper installation and maintenance can maximize its longevity but requires close monitoring. Closed-cell foam insulation has a longer life span of 30 to 50 years.

Yes, including recycled denim and cellulose from natural fibers.

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