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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Verified Reviews for Doorbell Installation pros in Turlock, CA

*The Angi rating for Doorbell Installation companies in Turlock, CA 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 May 16, 2025

Reviewed in May 2025
The crew worked very hard to remove the old and install the new fence. I am pleased. There have been a few issues since install that I had to deal with.
Ergeon
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Reviewed in April 2025
Jim did a great job installing my security door. He had to completely rebuild the trim from the shoddy work that was done by the house-flipper I bought the house from. Highly recommend.
Modesto PC
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Reviewed in February 2025
I had a new toilet installed by Steve about a year ago, and I couldn’t be more pleased with the service. Steve was friendly and professional, and very knowledgeable. He took the time to explain the process and answered all my questions. The installation was done quickly and efficiently, with no...
Seales Plumbing and Drywall
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Reviewed in January 2025
Carlos is such a polite and respectful person. He sincerely listened and did exactly what I wanted. His recommendations were also helpful! He installed 3 security cameras and the Ring Doorbell! He is an incredible professional. I will forever recommend him to others and use his services for all...
PEREZ ELECTRICAL SOLUTIONS
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Reviewed in November 2024
Brian did a very good install and completed it in short amount of time. I will recommend his service to anyone.
St. Clair Plumbing
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Reviewed in July 2024
From my initial consultation with Chade to my window install, the process has been very smooth, timely, and efficient. Art and Jose did my install. All my questions were answered during the process. I will definitely bring back this pair in any future projects!
Renewal by Andersen of Central CA
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Reviewed in April 2023
Happy with installation and service
Living Water Company
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Reviewed in February 2023
We hired ricky to install our security cameras and doorbell camera . He was very professional on time and tentative to our needs . He set up the cameras exactly where we wanted them. even places we were told couldnâ t be done bye previous inquiries. Very happy with the work it was definitely...
Smoov Energy & Electric, Inc.
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Reviewed in January 2023
I had garage door guy install door opener also replaced springs. He is responsible price and he responded quickly.
Garage Guy Door Repair & Maintenance
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Reviewed in February 2022
Hired Mike at Evans construction to install a new exterior door with framing and custom storm door installation. Mike did an outstanding job replacing everything IÃ¢Â Â ve never had my door open and lock this easy before. Great customer service and price for the scope of work. Even cleaned up...
Evans Construction
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Doorbell Installation questions, answered by experts

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.

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

Fiberglass is considered a favorite garage insulation choice due to its combination of affordability, ease of installation, and overall effectiveness. Fiberglass provides good thermal resistance, helping regulate garage temperatures and minimize heat transfer. Additionally, fiberglass is moisture-resistant, reducing the risk of mold or mildew formation.

A radiant barrier is a form of insulation topped with a reflective material designed to keep homes cool during hotter months. It is generally considered worth the investment if you live in a hot, sunny climate, as the cost can be recouped over time through lower energy bills. Installation costs typically range from $0.10 to $1 per square foot. After installation, homeowners in warm climates may save between $7 and $15 per month, potentially reducing their electric bill by 5% to 10%. The exact savings will vary depending on your location and the type of barrier chosen.

Periodic checks for moisture or pest issues ensure consistent performance.

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