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 Snyderville, UT 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 Snyderville, UT 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 26, 2026

Reviewed in February 2026
My home was such a crazy custom job with curved walls & my installer was so great! It looks absolutely beautiful & I was really happy with the process.
Prestige Hardwoods
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Reviewed in February 2026
Kayden responded quickly and had good communication. He was able to install quickly and reasonably priced we are very happy with his work and would recommend him/use him for future projects!
Kaden's Carpentry LLC
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Reviewed in January 2025
Installed Security doors and Window guards that turned out awesome. Custom fabricated to fit each Door, & Window to increase your Homes Security. Competitive Pricing, & Professional Installation. Highly Recommended A+++
Cottonwood Security Doors
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Reviewed in November 2024
Excellent customer care. Very carefull and accurate installation. Great Communication. Good Price. Helpful in the selection process. Listens to concerns and requests.
ACCESS GARAGE DOORS OF SALT LAKE CITY
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Reviewed in March 2024
Great experience with Northern Electric Company! They installed recessed can lights in my basement and upstairs hallway, as well as a few odds and ends like adding outlets in a closet and a Ring doorbell. Their team was professional and prompt. Great communication - they walked me through...
Northern Electric Services
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Reviewed in February 2024
Window Direct Installation surpassed my expectations with their service and expertise. From the initial consultation to the final installation,, The quality of their workmanship is evident in every detail, I highly recommend Window Direct Installation Company for their outstanding...
Windows Direct
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Reviewed in July 2023
Love the product. It makes a wonderful difference. Installation was quick and efficient and readily scheduled. Wish we had done this a lot sooner!
Envision Tinting, Inc.
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Reviewed in November 2022
Great work, fast installation, reasonable price.
The Brothers That Just Do Gutters Salt Lake City, UT
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Reviewed in September 2022
Iâ d used Steve before for a home lockout, so when it came time to replace the locks at my house, it was an easy decision to use Steve again. He installed 5 electronic locks, and did a great job. 3 of the installations were quite a bit more complicated than originally thought, but Steve was...
Awesome 24/7 locksmith llc
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Reviewed in October 2021
Installer was prompt, honest and professional .
Delta Garage Door, Corp.
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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.

Periodic checks for moisture or pest issues ensure consistent performance.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

Reduces energy costs, improves comfort, and prevents ice dams in winter.

Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.

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