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 Atchison, KS is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

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Last update on July 18, 2026

Reviewed in July 2026
I have hired Efrain two times. Once to carpet an entire house I was selling and another to install carpet in a house I was buying. On both occasions he picked up the carpet from the carpet store where I purchased it. Delivered to my house. Installed the carpet and disposed of the old carpet....
Champions Flooring LLC
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Reviewed in May 2026
Justin recently framed in and installed a new garage door for me. He was dependable, easy to work with, and the finished work looks very well done. Communication was good throughout the project, everything was cleaned up afterward, and you can tell he takes pride in his work. Always glad to...
Ashlas Overhead Door
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Reviewed in May 2025
We are very happy and satisfied with our fence. We had two 6 ft privacy fences and picket fence with one drive through gate and 2 walk through gates installed around our yard. The 2 men that did the work were very efficient and friendly and completed the entire job in 2 days.
Renew Crew Contracting, LLC
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Reviewed in August 2022
Timely response. Installed plastic covering over everything. no mess, cleanup was super. Highly recommend!
Home Shield
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Reviewed in August 2022
The work was all awesome. The installers was very perfestionable and clean.
Continental Siding Supply, Inc.
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Reviewed in February 2021
Anthony responded instantly to my enquiry (literally, hit send, less than a minute later the phone rang), asked smart questions, did his due diligence, came back with a good quote. Took his time on the external antenna install, secured and grounded everything, and then sorted the spaghetti in...
GP.AV
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Reviewed in November 2020
Very friendly instalation team. Very fast.
Bordner Home Improvement
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Reviewed in April 2016
Kent arrived on time, installed the door. I had ordered the wrong length, so he found he had to get additional parts. He was back the next day, got it all done, looks wonderful. Great value, I would definitely recommend.
Top Line Glassworks, LLC
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Reviewed in September 2014
he ordered a part on Thursday late for our AC it was overnight ed delivered late Friday pm, he came out Friday night at 8 PM to install it so we did not have to go all weekend with out AC during the hottest week of the year! He went over and above the call of duty and i can not...
Dunn Heating & Cooling
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Reviewed in July 2014
It went fine. We were getting a house ready for sale and they installed a new toilet. There were no problems scheduling the service. They sent one plumber and it took him about an hour. He was very personable. We thought he could’ve been a bit more cleaner, like putting on the booties and...
R Mech Heating Cooling & Plumbing
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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.

According to a report from Energy.gov, radiant barrier installations can save between 5% and 10% on your energy bill each month that your HVAC cooling is in operation. That fact can mean savings of up to more than $325 per year for homes that experience frequent direct sunlight and high summer temperatures.

Yes, usually you will need some kind of vapor barrier on the exterior walls when the framing is attached to concrete and masonry surfaces.

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.

Three signs that you need crawl space insulation are drafts, high energy bills, and mold. Drafts can start in crawl spaces and cause hot or cold air to spread to the rest of your home through holes in the floors and walls. And even if your entire home is well-insulated, you can still feel an unchecked draft from your crawl space and in your utility bill. Uninsulated crawl spaces can let in air and moisture, and because they’re built directly on the ground and difficult to dry out, they are hotspots for mold and mildew.

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