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>

Can I use fiberglass insulation to soundproof a room?

• <div><p>We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. <a href="https://www.angi.com/articles/diy-dangers-fiberglass-insulation-hazards.htm">Fiberglass insulation is dangerous</a>, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.</p></div>

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*The Angi rating for Doorbell Installation companies in Naranja, FL 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 19, 2026

Reviewed in June 2026
Great customer service, installation went smoothly. Installers were professional. Great job doing 11 impact window replacements and 3 doors.
Lock Tight Impact Windows and Doors, Inc.
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Reviewed in May 2026
The entire process was smooth sailing from beginning to end. Everyone I spoke with was very courtesy and professional. The installers did a great job installing the new windows and doors. Protect your home with LockTIght Impact Windows and Doors.
LockTight Impact Windows, Doors & Roofing
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Reviewed in July 2025
Installed and programmed smart switches and outlets throughout the whole house.
USMA SMART SOLUTIONS, LLC
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Reviewed in February 2024
The initial presentation of the product and all details about the project was done masterfully by Gustavo Ramirez. The installation was clean and professionally executed by Project manager Daniel and Installer Jaime. Me and my family are excited with our windows and door upgrade. Definitely...
Prestige Windows & Doors
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Reviewed in October 2023
They were available to install the garage door very quickly after i contacted them. The install went quickly and everyone was on time
Impact-Rated Garage Doors
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Reviewed in March 2023
The installation was quick and the process was stress free. Great customer service!
D.P. Blinds LLC
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Reviewed in September 2022
Michael did a great job with my garage door installation.
Safeguard Garage Doors, LLC
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Reviewed in October 2021
Good customer service. Installation was punctual
Christmas Light Guys
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Reviewed in September 2021
Installed in timely and professional way. Great customer service.
Nathan's Carpet and Flooring
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Reviewed in April 2021
The electrician came to my home and used the ring doorbell which I saw on camera and never knocked on the door. When looked at my camera I immediately called the dispatcher and he was so rude I decided I didn't want to use this company ever again.
Mister Sparky of Miami
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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.

We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. Fiberglass insulation is dangerous, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.

Reflective and high R-value batt or roll insulation are often considered energy-efficient, offering significant thermal resistance benefits.

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.

Periodic checks for moisture or pest issues ensure consistent performance.

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