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 Madison, MO 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 March 01, 2026

Reviewed in March 2026
We highly recommend this team. They replaced our entire chimney and wood stove last fall, and we’ve enjoyed the new setup all winter. The chimney system they installed is far safer and more efficient than what we had before. Their staff is professional, knowledgeable, and genuinely easy to work...
Advanced Chimney Techniques Inc
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Reviewed in August 2025
Noah and Crew actually built a Pole Barn for me. It’s 30’x48’ with attic trusses. They did an amazing job, it’s actually so nice I wish we didn’t cover it in tin metal! Perfectly square and amazing craftsmanship. Noah is very talented and trustworthy. I will most definitely be using him for...
Borntrager's Roofing and Construction
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Reviewed in January 2024
Ask to purchase and new wood stove from them and have them install it. They visited the house and said no problem. Then disappeared never to be seen again. If they didn't want to do it they should have said so. Called and ask about it only to be misled. I would advise staying away from this...
CONTROLLED AIRE
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Reviewed in December 2022
Awesome business and staff. Did a great job installing new windows.
Continental Siding Supply, Inc.
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Reviewed in March 2020
I should have known when they shorted the new foundation for the expansion by a foot that we were in trouble. They had to cantilever over the foundation to get the right dimensions for the expansion. They damaged our driveway and promised to repair it when the project was done. We had to buy...
Midwest Renovation LLC
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Reviewed in February 2020
They came and looked at the crack and told me that they didn't do that kind of work. That they wanted to install a sump pump to drain off the water. When I said that I didn't want that expense for a minor problem so the inspector left. Nice guy but I didn't have them do any work and I don't know...
Foundation Recovery Systems
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Reviewed in November 2019
all went well, had weather delays but no fault of installer, kept me informed on when they would start and kept his word. all done cleaned up and looks great, good for another 50 years...…(50 yr shingles) no problems on rehiring them to do more work.
Expert Roofing & Exteriors LLC
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Reviewed in November 2016
Randolph Development made an estimate on materials and labor, and the final cost was very close to the original estimate. The completed work improved the look of the porch. The company installed two sets of french doors for us last year, and we are pleased with the work.
Randolph Deveolpment
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Reviewed in October 2014
.Work was very professional and equipment meets all the standards I requested. ED Hancock came out after his crew completed installing and fine tuned system for proper settings of thermostat and all controls. <br /> I highly recommend Hancock for all your HVAC service. <br />
Hancock Refrigeration & Heating
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Reviewed in June 2014
I did some ground prep and they simply left me with a beautifully installed pool. They did a great job of clean up and my lawn didn't even look like heavy equipment was even back there. <br />
MIDWEST POOL & SPA
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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.

Reduces energy costs, improves comfort, and prevents ice dams in winter.

Upgrading insulation offers several benefits, including improved energy efficiency, which leads to lower heating and cooling costs. It also enhances indoor comfort by regulating temperature and can provide noise reduction. Additionally, better insulation has a reduced environmental impact and can increase your home's value and overall livability.

The best type of insulation for your home depends on your specific needs, climate, and the area you are insulating. For new construction, structural insulated panels are a highly energy-efficient option that is easy to install during the building process. In very warm climates, reflective insulation can be a cost-effective choice. For cold climates, fiberglass is an excellent option due to its high R-value and resistance to settling over time. Spray foam works well in humid environments because of its moisture-resistant properties. For standard attics, loose-fill, spray foam, or blown-in insulation are all suitable options.

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