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 June 24, 2026

Reviewed in June 2026
He installed 2 new toilets, cleNed up and removed old ones..we hired him to install a third this weekend, my husband was extremely pleased with his work
Anthony Nichols
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Reviewed in November 2023
Excellent company from customer service to installers. They installed in one day. Very impressed with the final product. They cleaned up after themselves. Installer were very professional, knowledgeable and courteous.
Clear Choice Home Improvements, LLC
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Reviewed in October 2023
The installation team was professional, efficient and affable. They worked well both independently and collectively. The chief installer took time to explain things and ran a good team.
Renewal by Andersen Boston
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Reviewed in March 2023
We had gutters installed on our new house. The gutter system was superior and on the recommendation from our son, we hired Clear Choice to purchase and install the gutter system. The installers were professional, polite and friendly. We were pleased with the job.
Clear Choice Home Improvements, LLC
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Reviewed in March 2022
The sales rep, customer service dispatch and installation crew were all helpful, courteous and easy to work with. Would definitely recommend Aho to others for gutter installation. I appreciate the installation crew arriving on time as promised.
Udderly Gutters, LLC
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Reviewed in December 2021
Extremely professional and knowledgeable. We are very happy with the end result. Ken D was an amazing install professional. If we ever have the need for Newpro again we are definitely requesting Ken for installation.
Newpro Operating, LLC
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Doorbell Installation questions, answered by experts

Yes, including recycled denim and cellulose from natural fibers.

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.

Ductwork should be wrapped in insulation in certain locations. This includes unconditioned interior parts of the home, such as attics, crawl spaces, basement ceilings, and between floors. Duct joints should also be insulated since they're more likely to leak air than other parts of your system. Building codes in some areas also require ductwork to be insulated.

Insulating your home's exterior walls can realize up to a 20% reduction in your monthly energy bills. This means that regardless of how much the project costs, it can begin to pay you back immediately. Additionally, adding spray foam and other high-end materials can increase the selling value of the property.

Through R-value assessments based on climate and existing insulation.

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