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>

How do I choose the right type of insulation?

• <div><p>Your home's location, budget, and the type of insulation you’re using are just a few of the factors that can help you <a href="https://www.angi.com/articles/r-you-using-right-type-home-insulation.htm">choose the right insulation</a>. For example, blown-in insulation is typically used in attic spaces, while batts and rolls are ideal for floors and walls. Blown-in insulation is usually a good option if you're adding more insulation to an area that already has some, but not enough.</p></div>

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Verified Reviews for Doorbell Installation pros in Mojave, CA

*The Angi rating for Doorbell Installation companies in Mojave, 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 Mojave, 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 March 18, 2026

Reviewed in March 2026
Installed it well and fast great service
General Improvements
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Reviewed in November 2025
Carlos, the owner of Energy Source Electric, came to our home as a request for an estimate to install a new electrical panel and upgrade the service from 100amp to 200amp. Within 10 minutes I knew I was going to hire him. He was very personable, professional, and it did not take but a few...
ENERGY SOURCE ELECTRIC
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Reviewed in November 2023
I had Kevin install 5 doors for me and he did an amazing job, would hire him again!
Clayton Handyman Service
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Reviewed in October 2021
Christian of Hartman Transformation did an amazing job on installing a window at our house. My husband and I had planned for a few years to have a window installed. We had multiple bids. Timing is everything. We contacted Christian . He agreed to come to discuss our idea and what we had in...
Hartman Home Transformations
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Reviewed in September 2020
Very good experience from the sales person to the installers.Everyone very professional and delivered what was promised. Beau W. and John W. were excellent installers and explaining the process as they went along.Highly recommend.
Renewal by Andersen of Boise
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Reviewed in February 2020
Excellent service. They went beyond the scope of the job to make sure that the kitchen looked great and I was happy. The installers were very professional and respectful of my needs.
Pro Star Builders, Inc.
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Reviewed in November 2018
They return phone calls.They are honest. They show up on time for appointments. They installed a skylight and put down plastic all over the kitchen in case part of the ceiling fell down. Workers were very nice and showed up 20 minutes early to start the job.
Suntek Roofing
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Reviewed in July 2018
Great. Jessy came out and confirmed what we thought. AC was done. It was original to house 22 years old. He checked it out and out furnace. Made a suggestion to replace furnace too which was also original to the house. He came out on a Sunday to do this for regular fee. We called Saturday...
Affordable Air & Heating
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Reviewed in October 2017
Took a while to get started due to permits from the county I live in, but once that was done the guys had it installed in the specified time. <br />
Sunlux Energy
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Reviewed in July 2017
From concrete to landscaping to patio cover, all the guys who worked on site were just great. They listened to my concerns and followed through with any questions I had. They were all very professional and knowledgeable and courteous. Holly and the other ladies who work in the office have been...
JNR Home Improvements
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Doorbell Installation questions, answered by experts

Yes. Proper, complete insulation will ensure that you trap the most cool or warm air inside your home, preventing high energy bills. In addition, insulation tends to settle and compress, leaving gaps over time; the more you insulate completely during the initial installation, the less you’ll need to do down the line.

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.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

Yes, you can use too much bubble wrap. If you overdo it with the wrapping, it can strain the top of your box and break open the taped seal, risking the chance that the contents of the box could fall out or break. Use enough wrapping to fully cover your item without compromising the security of your box.

Your home's location, budget, and the type of insulation you’re using are just a few of the factors that can help you choose the right insulation. For example, blown-in insulation is typically used in attic spaces, while batts and rolls are ideal for floors and walls. Blown-in insulation is usually a good option if you're adding more insulation to an area that already has some, but not enough.

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