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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Verified Reviews for Doorbell Installation pros in Edgecomb, ME

*The Angi rating for Doorbell Installation companies in Edgecomb, ME 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 Edgecomb, ME 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 August 15, 2026

Reviewed in August 2026
Dan and his team of Clinton and Julie worked very hard installing a stone step to exit a room on the South side of my house. Julie also pruned a large and unwieldy Rhododendron in my front yard. Dan kept me informed as to when they would arrive and they were very polite and considerate. I am...
Tree Pirates
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Reviewed in November 2024
Mike was extremely professional. He showed up on time, with all the necessary equipment and tools and got right to work. He communicated with me throughout the whole installation so I knew what he was doing and allowed me to ask any questions. Mike was very kind and respectful of my home. The...
I Know A Guy - Home Services
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Reviewed in August 2024
Three heat pump systems were installed. They have performed flawlessly and the installer was attentive and responsive. I will be using this business in the future
Max Pro Heat Pumps
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Reviewed in June 2023
A great job on our driveway install
Spear Head Excavation
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Reviewed in February 2023
Company called on a Saturday, and they showed up the following Wednesday. It was a 15 stair straight stair lift, and the job was done in 3 hours. Bo the installation person was personable, and did an excellent job with the installation.
Stairlifts Maine
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Reviewed in January 2023
Excellent customer service from project evaluation and estimate through installation and follow-up. System well designed and effective.
Maine Line Water & Radon Treatment
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Reviewed in August 2022
On time. Friendly. I’m happy with the install.
Merrymeeting Electrical Service
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Reviewed in June 2022
Cook's Door Service called to offer an earlier appointment than showed up on the Angi web site. They came when they said they would, measured the doors and were back to install the door panels and replacement opener within two business days. They were quick, courteous, and efficient. I...
Cook's Door Service's
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Reviewed in March 2021
Knowledgeable installer who gave us a price 20% below other contractors. Cleaned up afterwards. Installed new Trane Heat pump inside and outside with new refrigerant line inside house. Replaced water heater at a much better price.
Dean's Heating & Air Conditioning
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Reviewed in October 2020
Great job! The service personnel were professional in all aspects of the installation. We have gone through two of the **auto** start sequences perfectly.
Mid Maine Generator
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Doorbell Installation questions, answered by experts

A plastic vapor barrier should completely cover your basement to prevent water from penetrating through the walls. This typically goes before installing insulation to prevent moisture from building up and becoming trapped on the inside of your insulation, where it can collect and lead to mold damage. Installing insulation after the vapor barrier allows for any moisture to exit the walls for better ventilation.

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.

Yes, usually you will need some kind of vapor barrier on the exterior walls when the framing is attached to concrete and masonry surfaces.

The life span of insulation is between 20 and 100 years. At that time, existing insulation can fall victim to gravity, resulting in compression, which reduces its insulating protection or R-value. If you can't simply add more insulation over the existing material, removing the old to increase the effectiveness of the new can reduce your energy bills and make the project worth the time and money investment.

Yes, they address underlying issues, providing long-term seals and energy savings you might need help to achieve.

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