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>

Best doorbell installation pros near Madison, SC

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Verified Reviews for Doorbell Installation pros in Madison, SC

*The Angi rating for Doorbell Installation companies in Madison, SC 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 Madison, SC 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 March 12, 2025

Reviewed in March 2025
Jeremy answered my call for a new home generator install after the recent prolonged blackout. He reviewed the site and within a half hour provided a quote. They were swamped with new installs, but he promised the job in 2 months. He and a large crew finished when promised in half a day, then...
Gibson Electric
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Reviewed in March 2025
Chandler and the owners installers did an incredible job, very cautious and careful at the same time very sympathetic with us and our situation.
Crawlspaces And More
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Reviewed in November 2024
The door was not installed correctly and He did not comeback to repair . He did not return or anything .He wont answer txt. Remove dry wall inside .storm damage He did not come to remove the dry and repair the drywall . They did not remove that part . I cancel after he did not show up . In...
Lee's Painting
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Reviewed in September 2024
Darrin the owner has a wonderful crew who works for the company. They were exceptional, professional, prompt, courteous and clean in their work. I didnâ t pick up or clean up anything after they left. I will most definitely call Darrin (Affordable Closets) again. If you need closets installed...
Affordable Custom Closets
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Reviewed in May 2024
Austin did an awesome job, he was on time and provided a professional install. He makes sure the customers experience is second to none. I highly recommend using Snellings Contracting LLC for any of your electrical needs!
Snellings Electric
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Reviewed in April 2024
Shannon, Robert, and Rune did a great job installing my new shower!
West Shore Home Greenville, SC
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Reviewed in November 2023
Hired them to install a self purchased water heater and accessories. Did a great job and were very professional.
Next Plumbing
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Reviewed in October 2023
Derek was prompt in getting to our problems and his prices very fair. He installed two new sprinklers and moved some other around for me. Highly recommend. Also installs Christmas lights and landscape lights.
Clean Cut Landscaping and Irrigation, LLC
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Reviewed in May 2022
Duckett went above and beyond to complete my install!!
Duckett Plumbing
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Reviewed in October 2021
Prompt, professional service at an affordable price. I definitely recommend Shekinah Electric to my family and friends. I was completely satisfied with the service/installation. I would definitely hire this pro again.
Shekinah Electric
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Top-Rated Doorbell installation pros in Madison - Updated Nov 2026

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Doorbell Installation FAQs, 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.

When it comes to fiberglass insulation versus foam board, there are a few notable differences, both aesthetically and functionally. Fiberglass insulation is soft and flexible, meaning it can be squeezed into tight spaces more easily than foam board. Fiberglass insulation also has a higher R-value, making it a better pick for colder climates. However, foam board insulation can resist moisture and pest damage much better than fiberglass.

A radiant barrier is a form of insulation topped with a reflective material designed to keep homes cool during hotter months. It is generally considered worth the investment if you live in a hot, sunny climate, as the cost can be recouped over time through lower energy bills. Installation costs typically range from $0.10 to $1 per square foot. After installation, homeowners in warm climates may save between $7 and $15 per month, potentially reducing their electric bill by 5% to 10%. The exact savings will vary depending on your location and the type of barrier chosen.

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

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

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