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 May 01, 2026

Reviewed in May 2026
Bethany was great to deal with. Steve and Daniel showed up on time and did a fantastic job installing our wood fence panels. Would definitely recommend them.
Sanctuary Fencing
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Reviewed in September 2025
Very quick install and very professional. Would recommend anyone to use Jay’s Installs and More!
Jay's Installs & More
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Reviewed in December 2024
The gutters look great and neighbors have asked who installed them. Overall, friendly service.
LeafFilter Gutter Protection
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Reviewed in October 2023
Marc, Austin and Lyn showed up on time for installation of my doors for my mobile home. The installation was great as well as the personnel. They were polite and did an excellent job. If you get any of these guys to do the work for you, trust you will not go wrong. Excellent job guys!
West Shore Home Indianapolis
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Reviewed in March 2023
The two installers were amazing, very professional and neat! We are very satisfied with our window installation! We would highly recommend West Shore! From the salesman Darien to the two installers was a very easy process! We give both a 5 plus star rating!
West Shore Home Ocala
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Reviewed in February 2022
Great service had our door in a day. We were told by a big company we would get a door by August. Goes above and beyond to make sure we were satisfied. He is a top notch in his field. Fair pricing for door and installation.
Unified Garage Door Repair & Installation
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Reviewed in November 2021
Honest, fair, and dependable. Chip does great work, I needed a spray foam insulation installed and he delivered. I received a quote quickly for my project and he was able to fit me into his schedule. Chip has great customer service, he kept me updated and answered all my questions I had. I...
Chip Schultz Acoustics
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Reviewed in October 2021
I cannot begin to say enough about Don's craftsmanship. When my wife and I encountered an emergency remodel that was necessary to complete on a short turnaround in our son's nursery, Don answered the call. His quote to install a bay window seat with built in cubby holes for our son's books...
Don Lorenzi Construction
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Reviewed in February 2021
Excellent. Installers were on time, worked diligently and did a very nice job. They cleaned up the yard when complete and installed everything professionally. Oh, and their price was both fair and competitive with other bids.
All Florida Enterprises
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Reviewed in December 2020
The installers Ernie and Nate were respectful and caring of your house. They did a great job making sure everything was perfect before they left. We also want to give a shout out to our sales representative Jeff Beback he said we wouldn't be disappointed and he was right he also called us to...
West Shore Home Jacksonville
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Doorbell Installation questions, answered by experts

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.

Insulating windows without plastic is usually the better method. Outside of simply replacing your windows, you could buy cellular shades, which trap air between the window and the home, add a window film that blocks UV rays and traps heat, or cover your windows with a low-emissivity coating called “low-E.”

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation.

It is usually possible to install insulation yourself, but it’s often better to hire an insulation professional. An experienced insulation pro can determine which type of insulation is best for your space and the R-value get the most value and comfort in your home. Certain types of insulation can cause skin, eye, and lung irritation, and a professional will have the equipment necessary to keep themselves safe and limit the effect on your indoor air quality after the installation. Certain types of insulation—like blown-in and loose-fill insulation—demand a professional for proper functionality and safe installation.

Yes, including recycled denim and cellulose from natural fibers.

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