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 Everton, 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 Everton, 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 July 24, 2026

Reviewed in July 2026
We can always count on Jimmy, Chris and the A-1 Guarantee Roofing team for top-notch service! They not only answer all of our questions, but they are great to work with our insurance and their crew does a very efficient and professional install. We will always call and refer A-1!
A-1 Guarantee Roofing Inc
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Reviewed in July 2024
Mark and Dustin do great work! Fair prices. Attention to detail. Our guest bathroom door was sticking. Mark came back out and fixed our problem. No extra charge. Gutter guards installed a couple weeks ago. A fraction of the cost of Leaf Filter. Will have these guys back later in the year to...
Carpenter’s Kids Handyman Services
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Reviewed in March 2024
Very good professional experience and great installer A1 experience well done Sir.
Electric Geek Squad
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Reviewed in March 2023
They installed my ventless firplace and later installed the blower on it. They are very professional and do great work. I highly recommend using this company. I will use them again for future projects.
Page Plumbing & Handyman Services LLC
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Reviewed in December 2022
We are happy with the work that was done on our attic. Our utility bills have been less since the job was completed. The installers (owner and assistant) were great to work with. We are very glad we found them!
Climate Shield Insulation
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Reviewed in November 2022
This is great company. Was without air for 4 weeks. Called and had new install of unit within days. Very kind technician and reasonable cost!
HVAC Kings
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Reviewed in September 2021
Vertical I-beam supports were installed. The crew lead kept me informed during the whole process & explained each step. The crew was very professional & cleaned up great.
Foundation Recovery Systems
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Reviewed in July 2021
I hired Precision Asphalt & sealcoating for asphalt install and Sealcoating. Josh gave me a fair price and assured me he would start the job once he was done with his current job. At every instance he did what he said he would do at the time he said he would do it, as well as keeping me...
Precision Paving and Sealcoating
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Doorbell Installation questions, answered by experts

When installing board and batten siding, make sure there is wall sheathing and a moisture-resistant barrier installed. Behind that sheathing should be plywood or OSB for you to nail the boards and battens into. If there isn’t plywood or OSB, you can install vertical furring strips at 1½- to 2-foot intervals to nail the boards and battens to.

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.

Ensures uniform application and maximizes insulation effectiveness and energy savings.

It is generally completed in a day, depending on the attic size and access difficulty.

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.

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