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>

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Q: What is the lifespan of crawl space insulation?

• <div><p>The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years. </p></div>

Q: What's the difference between fiberglass insulation and foam board?

• <div><p>When it comes to <a href="https://www.angi.com/articles/fiberglass-insulation-vs-foam-board.htm">fiberglass insulation versus foam board</a>, 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. </p></div>

Q: Is fiberglass insulation safe for my home?

• <div><p>While fiberglass is dangerous to work with, it&rsquo;s a perfectly safe material once it&rsquo;s installed. If you&rsquo;re tackling the installation yourself, make sure you take the proper safety precautions and wear the right gear to avoid skin and eye irritation and lung complications. Working with a professional insulation company can mitigate these risks.</p></div>

Q: Is installing crawl space insulation worth it?

• <div><p>Yes, <a href="https://www.angi.com/articles/why-should-i-insulate-my-crawl-space.htm">crawl space insulation is worth it</a> if installed correctly. Installing insulation in your crawl space will improve the air quality, help stabilize your home's temperature, lower your energy bills, and prevent pests from entering your home. Though you&rsquo;ll pay more to install insulation initially, the savings you get from installing insulation can help offset those initial costs over time.</p></div>

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Verified Reviews for Doorbell Installation pros in Memphis, MO

*The Angi rating for Doorbell Installation companies in Memphis, 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 Memphis, 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 March 12, 2026

Reviewed in March 2026
Did a routine furnace check quickly and efficiently.
KETTLE MORAINE HEATING & AIR CONDITIONING LLC
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Reviewed in July 2022
We needed to replace a fence that had sections blown over with a wind storm. Renew Crew was the best quote and the best start time options. They did a great job and our fencing looks amazing! Renew Crew hauled away the old and maintained a clean and presentable worksite each and every day.
Renew Crew Contracting, LLC
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Reviewed in May 2022
Painted my whole dining room in a timely manner! Did a wonderful job!
Consistency Is Key, LLC
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Reviewed in May 2022
Incredibly polite and hard working young man who carefully explained The process and the cost. Ben did just what he promised us he would do and delivered above our expectations. We would absolutely hire him again
Benjamin Manco
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Reviewed in October 2021
Joe,Wade and Houston did an excellent job bringing a sunken foundation back several inches to original grade.
Groundworks
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Reviewed in April 2020
The job got done. He is the most reasonable around.
Smith Electrical
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Reviewed in August 2018
We hired Fox Valley Roofing LLC to replace our roof. We got quite a few estimates that were all very competitive so we went with the one that was most trustworthy. Allen Miller has a great personality and very confident. He answered our roofing questions better too. They were very professional....
Fox Valley Roofing, LLC
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Reviewed in December 2017
Terry delivers a very good quality of work and is easy to work with.
ELI Remodeling & Construction
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Reviewed in June 2014
We needed our boiler repaired. He wanted to replace it. We called the original installer for a second estimate and all it needed was a new burner and igniter. <br /> <br />
CHARLIE'S REPAIR
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Reviewed in July 2013
After six months the carpet in the living room and hall started bubbling. We thought it just needed re-stretched. So when we later bought more carpet for our basement we had the same installers re-stretch the carpet. Shortly after it bubbled again, not just in the two areas but in every room....
Dixon's Floors & More
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Doorbell Installation questions, answered by experts

The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years.

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.

While fiberglass is dangerous to work with, it’s a perfectly safe material once it’s installed. If you’re tackling the installation yourself, make sure you take the proper safety precautions and wear the right gear to avoid skin and eye irritation and lung complications. Working with a professional insulation company can mitigate these risks.

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, crawl space insulation is worth it if installed correctly. Installing insulation in your crawl space will improve the air quality, help stabilize your home's temperature, lower your energy bills, and prevent pests from entering your home. Though you’ll pay more to install insulation initially, the savings you get from installing insulation can help offset those initial costs over time.

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