Should I remove old attic insulation before adding new?

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

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*The Angi rating for Doorbell Installation companies in Cambria, 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 Cambria, 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 January 28, 2026

Reviewed in January 2026
I wish I could give Nick Kane 10 stars! He was amazing. I was shipped a TV that was scratched which we discovered just as he was about to install. He gave me a ride 30 miles to Costco, I exchanged it, he gave me a ride back home and finished the installation on the new TV that same night! And he...
Pacific Plains Electric
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Reviewed in January 2026
Had Pastor and his crew pour 2 concrete driveways on 2 different houses, they came out when they said they would, spent extra time making sure it was compacted, level, and rebar correctly installed. Did an awesome job, couldn't ask for any better quality than what they provided and would highly...
VERDUZCO'S CONCRETE
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Reviewed in September 2025
J0el saved the day when my drywall installer had a family emergency and cabinets were arriving in 2 days……So he worked on sunday and did a perfect job hanging the necessary drywall. He was actually better than the man I hired to do the job. He was on time,friendly,cleaned everything up and...
D'Mejia's Drywall Inc
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Reviewed in September 2024
I needed to have a barrier built on the other side of my Deck Railing to prevent the deer from coming along eating flowers and being on my deck. Tony and his crew did a fantastic and very attractive job building and installing it. They also moved the electrical light which shines along the...
El Dorado Construction
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Reviewed in July 2023
This was an installation of an EV circuit and a Tesla Wall Connector for non-Tesla vehicles. Markus was outstanding! He was competitively priced, on time, extremely responsive by email, text, or cell, and did a perfect installation! I will definitely use him again!
Link Electrix
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Reviewed in January 2021
Mike was friendly and was very informative. Installation was more affordable than other RO dealers.
Absolute Water
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Reviewed in December 2020
Very pleased with 805 Insulation and Mitch's professional and quick response for the estimate and installation. Installation day was on schedule, and the 805 installers were prompt, efficient, and showed me photos of the completed job under my house. Thank you!
805 Insulation - 805 Garage Doors
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Reviewed in September 2019
Jim Shepard, at Cal Paso Solar, had installed our original Solar System. When we added a central air conditioning system, we needed to add additional panels in order to cover the higher electrical demand. We had been so happy with the original installation that we called Jim again. He did not...
Cal Paso Solar
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Reviewed in May 2018
This is my response (in caps) to the response by calcite floured Construction: I gave Mrs. Sherry C a bid for $450 to fit custom door that I told her would not work properly because it was not the correct thickness for her opening and she said just make it work. THE NEW DOOR IS THICKER THAN THE...
Calisto Plourde Construction
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Reviewed in May 2018
This is my response (in caps) to the response by Calisto Plourde Construction: I gave Mrs. Sherry C a bid for $450 to fit custom door that I told her would not work properly because it was not the correct thickness for her opening and she said just make it work. THE NEW DOOR IS THICKER THAN THE...
Calisto Plourde Construction
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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.

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

In addition to adding insulation to your attic, you may want to add a radiant barrier. A radiant barrier works by using reflective material, such as foil, on the attic floor. As heat penetrates the roof and enters the attic, the radiant barrier reflects the heat upward and back through the roof. If you receive a lot of direct sunlight on the roof, using both a radiant barrier and insulation in your attic can provide significant benefits.

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.

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.

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