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>

Does basement insulation need a vapor barrier?

• <div>Yes, basement insulation needs a vapor barrier due to its susceptibility to moisture seeping in from the outside of the house. You should install a moisture barrier before you <a href="https://www.angi.com/articles/how-to-install-insulation.htm">install insulation</a> or purchase insulation that comes prebuilt with a moisture barrier to avoid water damage in your insulation and costly mold and water remediation expenses. </div>

Do insulation companies need to be licensed?

• <div>In some areas, insulation companies require a special license, while some states only require them to hold general contractor licenses. Some municipalities may not mandate any license, although you should always ensure a contractor is fully insured. You can use Angi’s <a href="https://www.angi.com/angi-license-check.htm">license lookup tool</a> to confirm whether or not an insulation contractor you’re considering holds the necessary license for your area. You can also contact the company for information regarding licenses, certifications, and insurance.</div>

What is the best type of attic insulation?

• <div>The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation. Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.</div>

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Last update on April 27, 2026

Reviewed in April 2026
Awesome experience. Completely shower install in one day. Courteous and trustworthy.
Mad City Windows & Baths
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Reviewed in October 2025
Poor quality work and terrible customer service. They were unable to fix a leaking water line, and instead convinced us to replace entire system. Brady took vacation the day of the install, left behind two under qualified technicians who were on my property till 8:30 at night. Yard was...
Apple RIver Well and Pump Company
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Reviewed in December 2024
Truhome Pros did an excellent job on our roofing project. We had storm damage and they got our roof covered through insurance. The installation cleanup on our house and shed were beyond our expectations. We would highly recommend Truhome Pros to anyone looking to get a new roof.
TruHome Pros
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Reviewed in February 2022
I had Imperial stone do quarts in my kitchen and two baths. After spending almost 8000 you would expect a quality job but that's not what I had received. What I did get was wrong cuts, seam where no seam was suppose to be and a broken sink that they broke that took two months to be replace....
Imperial Stone
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Reviewed in October 2018
Brighton Home Products was a pleasure to work with on our project. They were responsive, provided us with options and the install was done on time and in a professional manner. We give them an A+
Brighton Home Products Inc
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Reviewed in September 2017
We called our vendor because the equipment was not working. When the service man came out said couldn't be fixed. Installed a newer model. Was not a little less expensive than we thought - but the serviceman & product performed superiorly so was more than worth what we paid.
MidAmerica Basement Systems
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Reviewed in July 2016
I have worked with Window Design Center numerous times over the past 2 and a half years. I am a property/project manager and it always seems that I am in need of windows and doors. I have always received the same high level of professional and courteous service. Everyone is friendly and ready to...
Window Design Center
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Reviewed in August 2013
Jen was courteous & friendly when I met her at the store. Listened to my wants & needs, then helped me with options. Jen came out later to measure the room. Once we decided on carpet, Jen scheduled install. Crew was excellent. Jen followed up by phone & writing. Awesome experience throughout the...
Boss Carpet One Floor & Home
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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.

Yes, basement insulation needs a vapor barrier due to its susceptibility to moisture seeping in from the outside of the house. You should install a moisture barrier before you install insulation or purchase insulation that comes prebuilt with a moisture barrier to avoid water damage in your insulation and costly mold and water remediation expenses.

In some areas, insulation companies require a special license, while some states only require them to hold general contractor licenses. Some municipalities may not mandate any license, although you should always ensure a contractor is fully insured. You can use Angi’s license lookup tool to confirm whether or not an insulation contractor you’re considering holds the necessary license for your area. You can also contact the company for information regarding licenses, certifications, and insurance.

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

Cellular shades, also known as honeycomb shades, are the most energy-efficient and insulating window treatments. Their honeycomb structure is made of soft fabric that forms layered cell pockets. These pockets trap air, creating a thermal barrier that reduces heat loss in the winter and blocks heat gain in the summer. For even greater insulation, consider double- or triple-cell varieties. Side-tracked cellular shades, which seal the edges of the window frame, can further minimize air leaks and maximize energy efficiency.

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