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>

What are the best ways to insulate an attic?

• <div><p>Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into <a href="https://www.angi.com/articles/diy-spray-foam-insulation-kits.htm">spray foam insulation</a> or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.</p></div>

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*The Angi rating for Doorbell Installation companies in Fenton, 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 Fenton, 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 February 05, 2026

Reviewed in February 2026
The installers did a great job of installing a new quality basement door.
Midtown Home Improvements, Inc. (St. Louis)
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Reviewed in December 2024
Installers very friendly and did a beautiful job.
Midtown Home Improvements, Inc. (St. Louis)*
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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 October 2022
Fast appointment for quote and installation. Work done in a professional way.
LeafFilter Gutter Protection
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Reviewed in April 2022
The installers were prompt and professional. One of them even vacuumed up all the dead ladybugs while she was up on a ladder installing tint on upper windows!!! I am thrilled with their service and their product.
Total Tinting
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Reviewed in February 2022
Installation of Ring Doorbell and camera in garage. Very professional, courteous and knowledgeable. Would highly recommend them. February 2022
Wired Alarm & Surveillance Protection, LLC
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Reviewed in January 2022
Door installation was done quickly and professionally. My only concern was the time to get the door delivered.
Midtown Home Improvements, Inc (Atlanta)*
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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 January 2021
The installation of our Ring doorbell was very important to us and David was nothing short of professional, helpful, and knowledgeable. Our original doorbell was not compatible with our Ring doorbell and David spent all the time necessary to ensure it was properly installed. I highly recommend...
Handy Jack-The Home Improvement Pros
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Doorbell Installation questions, answered by experts

Installing insulation helps reduce energy usage, improve home comfort, and lower utility bills by maintaining stable indoor temperatures year-round.

It's essential to use insulation materials specifically designed for air ducts. Common types of duct insulation materials include fiberglass, foam board, and reflective foil. These insulation materials have the right properties to withstand the temperature and airflow conditions within the ductwork. Using the appropriate insulation not only ensures efficient temperature control but also prevents potential safety hazards or the release of harmful particles into the air.

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

Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into spray foam insulation or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.

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