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>

What are the four common types of insulation?

• <div><p>While there are many different kinds of insulation, spray foam, blown-in, foam board, and batt and roll are the four types you’re most likely to see. That doesn’t mean they’re alike, though. Each one varies drastically in terms of cost, materials used, and how they’re installed—not to mention, how well they limit heat transfer.</p></div>

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Verified Reviews for Doorbell Installation pros in Ladera Ranch, CA

*The Angi rating for Doorbell Installation companies in Ladera Ranch, 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 February 04, 2026

Reviewed in February 2026
The installer did a nice thorough job. I did have a nice new shower room to come home to. .
Shugarman's Bath
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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 2024
The install was great. Quick and easy. William owner was amazing. I definitely recommend
LUCKY RANCH CONSTRUCTION COMPANY
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Reviewed in May 2024
Quick response to inquiry and prompt, professional installation.
Westby 4 Homes, 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 June 2023
The entire process from inquiry to install was fantastic! Very good communication and information throughout the process. Installation was efficient and we are very happy with our system. Thank you Andrew Cimino, Cara Fennell, Caitlin Zimmerman, Spencer Brown, and the Lumina Team for your help...
Lumina Solar, Inc.
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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 June 2022
I live in an older condo built in the 1960&amp;#39;s which was renovated five years ago. I have been having problems with the doorbell and chimes and wanted an electrician to come out and tell me my options. My current doorbell is battery operated but the electrician went up into my attic...
Gerhard 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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Doorbell Installation questions, answered by experts

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.

While there are many different kinds of insulation, spray foam, blown-in, foam board, and batt and roll are the four types you’re most likely to see. That doesn’t mean they’re alike, though. Each one varies drastically in terms of cost, materials used, and how they’re installed—not to mention, how well they limit heat transfer.

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

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.

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