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 27, 2025

Reviewed in March 2025
Under cabinet light install. The technician was great. He confirmed that the job would be out of my price range and gave me an alternate solution. I felt that he was honest and wasn't pushy.
Potts Electric, LLC
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Reviewed in June 2024
Danny got the job done, installed a security storm door & hardware. Paid attention to details. Great customer service. Will hire again. Thanks
Residential Artistry LLC
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Reviewed in February 2024
Tim was able to complete my new door jamb installation in style. Thanks a lot!
Tandem Trades LLC
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Reviewed in February 2022
Professional installation and excellent product.
Midtown Home Improvements, Inc (Atlanta)*
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Reviewed in January 2022
Mike was fantastic helping me choose my new flooring for my kitchen, livingroom, hallway and master bedroom. She explained everything about the choices available. As to the installers "Wow" all of them were very good at their installation skills. I absolutely will use them when it comes...
CVM Enterprises, Inc.
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Reviewed in September 2021
Cynthia the owner was friendly and very helpful. The installers were knowledgeable and cleaned up after completion.
C&R Communications
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Reviewed in June 2021
Installation went smoothly and the fence looks great. Thank you so much!
Triton Exteriors
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Reviewed in October 2020
The install was quick and easy. Mike the install was very friendly and very good at what he does.
Bath Fitter
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Doorbell Installation questions, answered by experts

Monolithic slabs don’t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.

Upgrading insulation offers several benefits, including improved energy efficiency, which leads to lower heating and cooling costs. It also enhances indoor comfort by regulating temperature and can provide noise reduction. Additionally, better insulation has a reduced environmental impact and can increase your home's value and overall livability.

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.

Minimal maintenance is required, though regular inspections to ensure insulation hasn't shifted or deteriorated can improve performance over time.

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