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 Oakley, 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 August 04, 2026

Reviewed in August 2026
I had a wonderful experience getting my AC unit installed into my apartment by JR Construction. It was a difficult install because it is a side sliding window that required some customizing. Thankfully they were able to do a custom install and it came out perfectly! Whenever I need work done on...
JR Construction and Remodeling Inc
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Reviewed in May 2026
Anthony was very professional. He installed the ring alarm. He was very thorough in his job. Thank you for the excellent service.
Perfect Star Heating , Cooling, & Electrical
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Reviewed in July 2025
Very professional and timely quality skilled installation
Cabral Contractors Group, Inc.
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Reviewed in June 2025
Lobo Appliances & Installations did a magnificent job installing my hood range. They were very courteous and friendly! If I ever need any appliances installed they will be the first one that I will get in touch with!
Lobo Appliance Installations
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Reviewed in January 2025
Adam removed old metal gates and built and installed new ones. He communicated through the entire process.
Magic Metal Ornamental Fabrication
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Reviewed in December 2024
The customer service & installation team was absolutely outstanding! We could not be more pleased. They went over & above our expectations.
Express Flooring Tucson
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Reviewed in October 2023
Other widow companies told us the frame had shrunk, and new door had to be installed. This tech had the door out in 15min.new wheels installed. And now the door slides like butter.???????
EZ Sliding Door Repair USA, LLC
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Reviewed in October 2023
Great experience. Found AMG doors and windows online and they reached out and were able to clearly and professionally explain the step by step process of measuring the door ordering and the installation process. They were hassle free and was able to give me and over the phone quote for my new...
AMG Custom Builders
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Reviewed in April 2023
Did a wonderful job installing new wster hester and bringing everything up to code. The technician, Joseph, was extremely knowlegeble and explained the installation process in great detail and was open to answering any questions I had.
Fast Water Heater Company
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Reviewed in September 2022
Excellent customer service Excellent product Excellent installation On time and professional
Attic Pros
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Doorbell Installation questions, answered by experts

Insulating your home's exterior walls can realize up to a 20% reduction in your monthly energy bills. This means that regardless of how much the project costs, it can begin to pay you back immediately. Additionally, adding spray foam and other high-end materials can increase the selling value of the property.

Insulation is professionally installed by measuring spaces, cutting materials to fit correctly, and placing them without gaps for optimal thermal resistance.

Yes, professionals can add extra insulation or backing for enhanced sound control.

Depending on the item, several different materials are beneficial for long-term storage. Bubble wrap and plastic wrap help ensure delicate ceramics or furniture are safe and secure. High-quality moving boxes made of durable materials like plastic also help ensure the longevity of your storage, as cardboard will degrade faster over time.

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.

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