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 Silverado, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

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

Last update on November 15, 2025

Reviewed in November 2025
Mission Alarm did an excellent job installing my home alarm system. Carlos showed up on time, was professional, and did a great job with the installation. Everything works perfectly, very satisfied with the service. Highly recommend!
Mission Alarm
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Reviewed in August 2025
Mark did an exceptional job for us that was complicated and involved special knowledge in low voltage wiring. He found several issues that prevented me from completing the wiring for two Ring doorbells and two chimes in the house. He has excellent customer service skills and I will definitely...
1st Place Electric Company Inc.
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Reviewed in October 2023
Very prompt and great job installing bathroom faucet and drain.
Santos Handyman
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Reviewed in March 2023
Had our windows installed this past Monday. Trey K, Jordan K & Nathan W were professional, respectful, courteous and good communicators throughout the window installation process. And also kept my property clean.
Renewal by Andersen of Boise
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Reviewed in January 2023
Punctual, Up front, honest, clean install.
Meineke Electric
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Reviewed in January 2023
Prompt response and installer is very good answering all the questions
Speedy Garage Door and Gate, Inc.
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Reviewed in November 2022
Quick fast installation and price is great!
Flo-Electric
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Reviewed in May 2022
Mr. Rene Sussman, Electrician, was courteous, responsive, no nonsense, and went right to work. My doorbell has not worked for 24 years. Rene replaced the Chime and installed my RING doorbell system. My wife mentioned we need to expand our canned ceiling lighting in our living room, and He...
Green Electric Solutions
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Reviewed in March 2021
Brian Kissel did an outstanding job installing 2 ceiling fans and new wiring and a doorbell transformer and wiring. I highly recommend him and he a very nice person and communicates well.
Kissel Electric
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Reviewed in November 2020
I was so pleased with the courtesy and professionalism of the electricians! I called because my heater stopped working, and my gut said it was electrical. They figured it out and had it fixed in less than 30 minutes. While they were there, I asked them to check the kitchen lights. (My last...
Tim Hensons Unique Lighting
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Doorbell Installation questions, answered by experts

Yes, including recycled denim and cellulose from natural fibers.

Installing sheets of plywood over attic insulation is a popular choice, especially in storage spaces. That said, insulation works by trapping hot air—so it needs extra space to expand and be effective, or you might reduce the energy efficiency of your home.

It’s important that you never compress the insulation by installing flooring directly on top of it. In many houses, you’ll need to install a subfloor before putting plywood over insulation in your attic.

While not every wall requires a vapor barrier, if you do need one and don’t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.

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.

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

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