Should I remove old attic insulation before adding new?

• <div><p>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: </p><ul><li><p>If the insulation is over 15 years old</p></li><li><p>If the insulation is wet or moldy</p></li><li><p>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></p></li><li><p>If you see signs of pest infestation</p></li></ul><p>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</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 Healdsburg, 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 June 11, 2026

Reviewed in June 2026
Received quote to install a metal fence gate. Quick response, Dayne was very responsive and polite. Appreciate that.
Ergeon
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Reviewed in January 2026
We hired Adam to install stair rails for the front entry. He was easy to get ahold of, was prompt for every scheduled visit, and explained what options were available. He had all the necessary equipment and tools to work on site. If I needed more rails done I would definitely call him...
Magic Metal Ornamental Fabrication
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Reviewed in November 2025
I had 2 ceiling fan/lights installed in the bedrooms. Installation included 2 new circular circuit boxes in each bedroom ceiling. In addition, I replaced the kitchen ceiling light with an LED fixture. The 2 workers were very polite and professional and worked quickly and efficiently, in...
Sonoma Coast Electric, Inc
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Reviewed in August 2025
Joe did a great job installing an electric vehicle charging station in our home. He was quick to respond to set up a time to come by to survey the project and get an understanding of what I was looking for. He gave me a fair price for work comparable to how he would set it up if it were his...
Osprey Electric
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Reviewed in March 2025
On-time and professional, neat, and organized install. I would recommend.
AMP-A-NEER
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Reviewed in April 2024
I hired TC Builder to install a new fire-rated door and trim, and I couldn’t be happier with the results. They did an excellent job, completing the work promptly and professionally. They showed up on time and were very courteous throughout the process. I highly recommend their services!
TC BUILDER
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Reviewed in January 2024
Lancer was prompt and thorough. Had the new outlet installed in probably under an hour, and the installation was reasonably priced. Even gave me a couple of his logo mugs after he was done! Will definitely hire him again for any additional electrical work in the future.
Lancer Miller
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Reviewed in December 2023
The installer was very skilled. We had them install new tile in the bottom of our shower as the old tiles were not adhering and the shower floor wasnâ t angled properly for water to drain. During installation, there was water discovered coming from under the shower borders. The installer went...
Aguilar Tile Installation
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Reviewed in November 2023
I had a great experience with the whole Elevated Garage Doors team! I met with Joe to figure out options for our new door. He was very knowledgeable and relaxed, I didn’t feel any pressure to buy like I did with some of the other companies I met with. The install went very well. Mike and his...
Elevated Garage Doors
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Reviewed in September 2023
Good experience good price very helpful on the phone (Al), install guys came on time
United Water
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Doorbell Installation questions, answered by experts

Insulating windows without plastic is usually the better method. Outside of simply replacing your windows, you could buy cellular shades, which trap air between the window and the home, add a window film that blocks UV rays and traps heat, or cover your windows with a low-emissivity coating called “low-E.”

Acoustic foam, fiberglass insulation, soundproof curtains, and specialized drywall are effective in reducing noise transmission.

It is generally completed in a day, depending on the attic size and access difficulty.

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation:

If the insulation is over 15 years old
If the insulation is wet or moldy
If it is vermiculite insulation
If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

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.

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