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 Commerce, GA 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 June 28, 2026

Reviewed in June 2026
Rosendo and Eduardo did a great job. Completed the install with precision, were very neat and clean. Would recommend Allgood and this team to anyone in need of AC services.
Allgood Home Services
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Reviewed in September 2025
We bought a cabinet that we needed put together and installed. Hendry Home Repair and Renovation got it done quickly and well done. Was the easiest person I’ve ever dealt with. Just left him alone and he had it done in a few hours. Would highly recommend.
Hendry Home Repair and Renovation LLC
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Reviewed in December 2024
Nathan, the point man, was thorough and patient while explaining the process. The installation technicians were prompt, professional, and friendly. The accounts payable person was also patient and friendly. I'm very pleased and highly recommend them.
Crawlspaces And More
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Reviewed in February 2024
Everything was great,, quick installation and very professional. Will use them again in the future.
Window Comfort
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Reviewed in March 2023
The installers came with 17 windows, one which was a garden window in the kitchen, if there was any intricate work (which there was, such as the garden window) Richard was the person who took care of it, and more than satisfactory. He answered all my questions. If needed I would use him again!
Windows and Doors by Richard
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Reviewed in January 2023
JJ removed 3 interior doors and installed 3 new doors. Each door had to be trimmed to fit the opening JJ was prompt with his response to my request. He arrived on time and finished the job to my satisfaction. His price for the door work was reasonable. I would use Door Installations by JJ...
Door Installations by JJ
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Reviewed in January 2023
He came to our home on a Sunday for what we thought was a simple oven install. So many things were odd about my installation. He stayed for about 4 hours and addressed every issue that presented itself. Wonderful man. Very knowledgeable and friendly. Whole heartedly recommend this company. A job...
Part Time Alias
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Reviewed in October 2022
Great guy came in explain all the Tinting, he was here on time. He came 5 days later back install the window tinting Did not even know they were here they cleaned up afterwards no problem
Solar Solutions Glass Tinting
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Reviewed in August 2022
Everything was great from sales team through installation. Sent quality control person to inspect the installation and help with initiate the warrantee period. Very professional staff and service.
Power Home Remodeling
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Reviewed in July 2022
Johnathon answers the phone and he checks in to follow up after the installation and he explains everything throughout each process.
HVAC/Construction, LLC
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Doorbell Installation questions, answered by experts

Each of the three types of wool insulation has particular disadvantages. While their R-value is higher, they all cost more than fiberglass versions. Installing mineral wool and sheep wool requires protective gear. Because of its vulnerability to insects, chemicals are used in its production. Hemp wool is more costly to install than other types because additional tools and labor are involved.

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

Ensures uniform application and maximizes insulation effectiveness and energy savings.

Acoustic foam, fiberglass insulation, soundproof curtains, and specialized drywall are effective in reducing noise transmission.

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.

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