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>

Should I remove old attic insulation before adding new?

• <div>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: <ul><li>If the insulation is over 15 years old</li><li>If the insulation is wet or moldy</li><li>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></li><li>If you see signs of pest infestation</li></ul>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</div>

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Last update on March 31, 2024

Reviewed in March 2024
Very good professional experience and great installer A1 experience well done Sir.
Electric Geek Squad
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Reviewed in December 2022
We are happy with the work that was done on our attic. Our utility bills have been less since the job was completed. The installers (owner and assistant) were great to work with. We are very glad we found them!
Climate Shield Insulation
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Reviewed in July 2021
I hired Precision Asphalt & sealcoating for asphalt install and Sealcoating. Josh gave me a fair price and assured me he would start the job once he was done with his current job. At every instance he did what he said he would do at the time he said he would do it, as well as keeping me...
Precision Paving and Sealcoating
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Reviewed in May 2021
At my first yearly review of my crawl space, dehumidifier and sump pump (included in the installation agreement), I received service above and beyond from Nick Gunther. He walked me through his inspection and answered my questions. I also had an issue with a vehicle in his way and he assisted...
Foundation Recovery Systems
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Reviewed in September 2018
Everyone at Shine Solar was helpful throughout the entire process. Installation went great! The installation crew was very informative and respectful. From the first time we spoke with a representative to the day we were up and going was about 2 months and installation took a day. Someone always...
Shine Solar LLC
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Reviewed in September 2016
I read reviews and used the web link to go to Down Home's site. From there, I decided to send them an email message and I had a reply first thing the next morning. I spoke with Brandon, told him what our issues were and he told me he would call the next Monday to set up an appointment for the...
Down Home Heating & Air
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Reviewed in May 2016
Excellent work, great staff (both sales and install), cleaned everything up when done and never once complained about adjustments I made as we went (changed mind on shutter color, had them change how the house numbers were installed). HIGHLY recommend.
Classic Exteriors, LLC
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Reviewed in August 2013
Charley Smith came out and gave us a complete estimate and explained everything. He gave all kinds of information about crawl space construction and told us exactly what his company could do. His team of 4 started the job about 10 days later. They were very professional and explained...
Basement & Foundation Repair of the Ozarks
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Reviewed in May 2013
Mr. Messenger arrived on time and went to work quickly. He answered any of our questions directly and to the point. He drained the old heater, disconnected it and hauled it out of the house. He positioned the new heater, cut some old water lines and installed new ones with the latest pipe and...
Prime Plumbing
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Reviewed in August 2009
We had a rough start. The estimator was hours late and did not call. When the installation finally happened, I was not satisfied with the fit of the door. The owner came over and adjusted the door to make is seal as it should. Now I am very happy with my new doors and get compliments from...
Garage Door Solutions
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Doorbell Installation questions, answered by experts

Mineral wool has an excellent life expectancy of up to 50 years, provided it's kept dry and free of pests. Compared to fiberglass, with a life span of 20 to 30 years, mineral wool stacks up well for long-term cost savings. Sheep wool maintains a similar life span to fiberglass, while estimates for hemp wool insulation life expectancies are all over the board, ranging anywhere from 20 to 100 years.

While fiberglass is dangerous to work with, it’s a perfectly safe material once it’s installed. If you’re tackling the installation yourself, make sure you take the proper safety precautions and wear the right gear to avoid skin and eye irritation and lung complications. Working with a professional insulation company can mitigate these risks.

Fiberglass is considered a favorite garage insulation choice due to its combination of affordability, ease of installation, and overall effectiveness. Fiberglass provides good thermal resistance, helping regulate garage temperatures and minimize heat transfer. Additionally, fiberglass is moisture-resistant, reducing the risk of mold or mildew formation.

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.

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation:

If the insulation is over 15 years old
If the insulation is wet or moldy
If it is vermiculite insulation
If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

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