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 Maplewood, MO

*The Angi rating for Doorbell Installation companies in Maplewood, MO 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 Maplewood, MO 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 July 29, 2026

Reviewed in July 2026
Installation is scheduled for September.
Bath Fitter
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Reviewed in September 2024
The installers were very professional and polite! I give them 5 stars!
Newpro Operating, LLC
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Reviewed in February 2024
Tim was able to complete my new door jamb installation in style. Thanks a lot!
Tandem Trades LLC
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Reviewed in August 2022
Prompt, courteous, good price, excellent install and cleanup.
St. Louis City Exteriors, LLC
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Reviewed in February 2022
The whole process was easy and painless from ordering the door to having it installed. Highly recommend, will hire again.
Chaney Windows and Doors LLC
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Reviewed in February 2022
Professional installation and excellent product.
Midtown Home Improvements, Inc (Atlanta)*
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Reviewed in September 2021
Professional, timely installation, attention to detail.
Onsite Window Screening Pros of St. Louis
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Reviewed in June 2021
Installation was quick, efficient and looks great!
CVM Enterprises, Inc.
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Reviewed in March 2021
Power Up installed three items. 1. They installed an electric service for our new freezer. 2. They installed a Nest doorbell. 3. The big job was their installing a nine camera security system on our home. Their work was excellent and are always ready to answer any questions before, during,...
Power Up Electrical Contractors, LLC
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Reviewed in November 2018
He installed a new doorbell.
Academy Air
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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.

Minimal maintenance is required, though regular inspections to ensure insulation hasn't shifted or deteriorated can improve performance over time.

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

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

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

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