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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*The Angi rating for Doorbell Installation companies in Mattoon, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

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Last update on August 01, 2025

Reviewed in August 2025
Ryan and his team installed a whole house generator for us as well several additional outlets in our home. Very timely and professional. Would recommend to anyone needing electrical service.
Apex Electrical Solutions
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Reviewed in June 2025
Great to work with and did a great job on the install and explaining how to care for the system. Would highly recommend.
Pure Water Solutions
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Reviewed in May 2024
My shower installation project was flawless. Their team of installers worked diligently to ensure everything was done to perfection. I give them high praise.
Perfect Choice Exteriors LLC
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Reviewed in February 2023
The unique designs team installed kitchen cabinets in a kitchen remodel for us, and also tiled the surround of our fireplace. Both jobs were done with care - team members took pains to make sure all trim work was done in fine detail, asked for my input if they encountered any questions or...
Unique Designs LLC
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Reviewed in January 2023
Responded very quickly. Installed new outlet and was finished in an hour. Professional attitude and great work ethic.
Waggle & Company
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Reviewed in June 2022
We hired Apex for a cedar fence install. The guys did a great job. Great quality and customer service. Would hire again.
Apex Carpentry & Construction
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Reviewed in October 2021
Daniel and his team were amazing to work with. Whole house tile installation from floors, to bathrooms, to backsplash in kitchen. Quality and professionalism were top notch. He helped me with design questions along the way and made the process very smooth. I would highly recommend him to anyone...
Art Tile Company
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Reviewed in April 2021
Reuben and his crew were wonderful. We had them install the metal siding, shingle roofing and metal roofing on our home (which is new construction). They were prompt, friendly, professional, and provided excellent quality work. We will be using them again this summer to do work on our dock at...
Marvon Construction, LLC
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Reviewed in June 2020
Jason and his crew communicate on a regular basis and are excellent at helping you figure out what will work in your home. They are punctual and highly professional.... will install carpet next!
Stone Cold Tile Inc
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Reviewed in May 2020
It was excellent. the installation was great and they were very professional.
Brooks Creek Cedar
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Doorbell Installation questions, answered by experts

Installing insulation helps reduce energy usage, improve home comfort, and lower utility bills by maintaining stable indoor temperatures year-round.

DIY insulation installation is feasible, particularly for basic rolls or batts, if you have the right protective gear and knowledge. However, hiring a professional ensures even, full coverage for maximum efficiency.

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.

Depending on where you live and the conditions of your basement, you may not need to insulate your basement. Your best bet is to talk to a basement remodeling company to find out what they recommend doing.

Insulating your basement can help improve your home's energy efficiency, but it will also increase the cost of your basement remodel project. The average cost of installing basement insulation is $2,400.

Yes, professionals can add extra insulation or backing for enhanced sound control.

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