Should you remove old insulation before adding new insulation?

• <div><p>You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.</p><p>However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.</p></div>

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Last update on February 05, 2026

Reviewed in February 2026
Was extremely happy with the quality of the work performed. I had a Tesla wall charger, outlet, and garage work light installed and everything was installed cleanly and professionally. I would absolutely hire Marty’s Electric again and will highly recommend them to anyone needing quality...
MARTY'S ELECTRIC LLC
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Reviewed in July 2025
I had Anthony come install attic access steps into my garage. He was polite and his work was fantastic! He arrived on time and quoted me a very fair price. I will definitely hire him again for more work!
On Center Residential Remodeling LLC
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Reviewed in November 2024
Installed canned lighting over my living room, dining room and kitchen. Also completely rewired my electrical upstairs. We had a unique need for 3 switches for 1 light/ fan and he installed it with ease. He does wonderful work and really works hard. Iâ ve always been very impressed with his...
Overbeek Plumbing and Electrical LLC
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Reviewed in November 2023
Great service from everyone we spoke to and saw. Adam and Dylan were here mostly and did a fantastic job with the installation of our furnace, very efficient and got the job done! Highly recommend!
Tri City Air Conditioning Co
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Reviewed in October 2023
Great customer service and the installation went smoothly. It was pricier than other companies but we are happy with our roof.
Stellar Roofing, Inc.
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Reviewed in July 2023
The project was handled professionally from start to finish. Their communication was excellent. The installation crew was very professional and did an excellent job installing a new chain-link fence in a difficult terrain. I highly recommend this fence company.
Westbrooke Fencing, Inc.
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Reviewed in April 2023
He is very professional and one of the best installers that I have worked with
All Seasons HVAC, LLC
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Reviewed in April 2023
Great work! The guys came out and installed everything perfectly. Super friendly and nice. Would recommend to anyone
Hometown Plumbing
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Reviewed in January 2023
Excellent quality and craftsmanship! Greg did a custom whole house cabinet design, build, and install for our home. Would use his services again. Fair and reasonable prices, delivers as promised.
Coblentz Custom Cabinetry
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Reviewed in July 2021
Very flexible and professional. He even went to the store to get the supplies for my doggie door install because I was not able to before he came. Thank you so mich
Painter Contracting
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Doorbell Installation questions, answered by experts

They recommend sustainable materials and water-saving fixtures, tailoring choices to balance sustainability and style.

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

Yes, winterizing your mobile home is helpful for your safety and savings. Keeping your mobile home safe, secure, and warm during the winter will protect it against damage from harsh weather, which can lead to expensive repairs. Not only that, but winterization also helps to lower your energy bills by keeping warm air in and cold air out.

The time required for insulation installation can range from a few hours to a few days, with most projects taking 1-3 days to complete. The final duration depends on the project's size and complexity, the area size, and the type of insulation being installed.

Yes, professionals install and upgrade insulation for all home or business areas.

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