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 Ashley, OH 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 Ashley, OH 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 June 08, 2026

Reviewed in June 2026
Fast and efficient install at a reasonable price.
Logan Services A/C, Heat & Plumbing
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Reviewed in April 2025
Fantastic company to work with from start to finish. I had a new garage door installed and my sales associate, Steven, was very professional and helpful. He walked me through all of my choices and was even able to bring everything up on his laptop with a pic of my house and my door choice. It...
The Door Guys
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Reviewed in January 2025
Very professional. Helped with install
First Class Home Repair, LLC
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Reviewed in October 2022
Very satisfied with the quality of the doors and the professional installer!
Columbus Window & Door LLC
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Reviewed in August 2022
Backyard patio paver installation. Very good!
DLG Property Services, LLC
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Reviewed in May 2022
Great professional! Jeff was very patient with all my questions before the install and very professional during the installation. Was a pleasure to work with.
A-1 Quality Carpentry
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Reviewed in March 2022
The Precision Door installer was kind, courteous and answered all my questions. He got right to work finished the job in good time.
Precision Door Service of Columbus
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Reviewed in January 2022
Ryan was very helpful and professional when discussing pricing and options. The installation was quick and the windows looked wonderful.
Freedom Windows, LLC
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Reviewed in October 2021
The communication was excellent, the installation was done in a timely manner, and the price was just right! Thank you, I love my new floors!
Team Thompson, LLC
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Reviewed in October 2021
C I did a wonderful job installing a new front door and storm door for us. Both doors were top quality and the installers were quick and did a great clean up. Door function and seal were perfect. We have lived in several houses over the years and there is always work to be done but I don't...
Classic Exteriors, LLC
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Top-Rated Doorbell installation pros in Ashley - 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.

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.

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

Fiberglass is the best insulation for HVAC ducting because it's inexpensive, widely available, versatile, and long-lasting. Fiberglass also offers acoustic insulation in addition to thermal insulation, which can contribute to a more peaceful home environment. You can use other materials like mineral wool, but fiberglass is the industry standard.

You don’t need to staple insulation, as your drywall and studs will hold it into place. But if you already have a staple gun and staples lying around, it can help keep the product in place and avoid any shifting. But, most experts agree it’s an unnecessary step.

If you’re adding a vapor barrier, you will need to staple that in place.

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