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 Miner, 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 Miner, 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 December 29, 2025

Reviewed in December 2025
The Honey Do Crew did an excellent job installing my interior barn door. They also built and installed a custom rustic header that fits the space perfectly and really enhances the overall look of the room. The work was clean, professional, and well done, and they even took the time to share...
The Honey Do Crew
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Reviewed in November 2024
Professional install and great service. MattÃ¢Â Â s very easy to work with. Contact you fast with an questions or concerns.
Comfort Kings Southeast Missouri
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Reviewed in November 2021
Great professional service meeting the deadline before deadline date. Quality craftsmanship work. Excellent attention to detail
Good News Development Inc.
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Reviewed in March 2021
After researching and getting several estimates decided to hire Armstrong construction to extend my deck and screen it in. I chose them because their price was less than all the other bids (should have been my 1st clue), and I looked at pics of previous work and reviews were great, also they...
Armstrong Construction
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Reviewed in January 2020
I had a very positive experience with Freddy. He is professional and prompt with communications and appointments. His work was very good. He installed a manufactured handrail for a staircase and purchased towel rack for the bathroom. I was pleased with both installations. Additionally,...
FC Handyman Services
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Reviewed in June 2015
We called Dan and he was really covered up, but he came over and had our air working in no time at all. He is the one that originally installed my unit in 2009. It was under warranty still, which I had not idea, so the new motor cost nothing. I would recommend Dan for all of your heating and...
Dan's Heating & Air Conditioning
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Reviewed in August 2014
They came out the same day that I had called. I had my quote the vey next day. We set up a day for install and they were on time and very professional and had everything installed within about 4 to 5 hours.
HEISE HEATING & COOLING INC
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Reviewed in July 2014
Ken's crew worked very hard installing and cleaning up work site after making home improvements. Highly recommend this company.
SOUTHEAST HOME IMPROVEMENT
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Reviewed in August 2013
I had Sears deliver and install a new washer and it did not sound correct the first time I used it. Sears could not get a service man out for sometime and I needed the use of the ew wash machine.I then called Rogers Appliance service to check it out. It was necessary for him to level the new...
ROGERS APPLIANCE REPAIR
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Reviewed in February 2012
On 11-04-11 SEMO Flooring installed vinyl flooring in my kitchen and dining area. On 11-06-11 I noticed wrinkles in the flooring. I called SEMO Flooring and they said they would come by to look at. They never showed ar called. It has been 3 months and they still don't return my calls and I still...
Semo Flooring
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Doorbell Installation questions, answered by experts

Installing sheets of plywood over attic insulation is a popular choice, especially in storage spaces. That said, insulation works by trapping hot air—so it needs extra space to expand and be effective, or you might reduce the energy efficiency of your home.

It’s important that you never compress the insulation by installing flooring directly on top of it. In many houses, you’ll need to install a subfloor before putting plywood over insulation in your attic.

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.

Ensures uniform application and maximizes insulation effectiveness and energy savings.

It is usually possible to install insulation yourself, but it’s often better to hire an insulation professional. An experienced insulation pro can determine which type of insulation is best for your space and the R-value get the most value and comfort in your home. Certain types of insulation can cause skin, eye, and lung irritation, and a professional will have the equipment necessary to keep themselves safe and limit the effect on your indoor air quality after the installation. Certain types of insulation—like blown-in and loose-fill insulation—demand a professional for proper functionality and safe installation.

Depending on where you live and the conditions of your basement, you may not need to insulate your basement. Your best bet is to talk to a basement remodeling company to find out what they recommend doing.

Insulating your basement can help improve your home's energy efficiency, but it will also increase the cost of your basement remodel project. The average cost of installing basement insulation is $2,400.

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