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 La Plata, 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 La Plata, 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 April 18, 2026

Reviewed in April 2026
DO NOT CALL THIS GUY. INCOMPLETE WORK. INCREDIBLY OVERPRICED. HE WILL NOT TELL YOU HOW MUCH ANYTHING WILL COST UNTIL HE WANTS TO LEAVE. Unless you want to get ripped off and left with more work for another electrician, look elsewhere. He showed up with 2 guys for a simple/basic job,...
NEMO ELECTRIC CO
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Reviewed in January 2021
I was referred by Home Depot. The representative was knowledgeable and professional. I ordered three windows and was very happy with the difference it made in the bedrooms. I am ordering the rest of my windows to be replaced. The installers were efficient and did a wonderful job.
Continental Siding Supply, Inc.
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Reviewed in November 2020
The sales team and service installers were all very professional. The windows are HIGH quality. I am very pleased.
Continental Siding Supply
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Reviewed in September 2020
The first time I called him, Jim showed up in 20 minutes on a Sunday afternoon! He came to unplug the sink due to a clogged garbage disposal, which only took about 10 minutes. Since he charged by the hour, he actually asked if there was anything else he could do! I've never had any other...
Elite Handyman Services - Home Facebook
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Reviewed in November 2019
I had a 700 sq ft porch enclosed and wanted it insulated with closed cell foam, at less than an ideal time of the year to spray due to cold temperatures and moisture concerns. The crew that arrived, at a last minute request by me was on time, and extremely helpful in getting the project done on...
Hawkeye Enterprises
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Reviewed in January 2016
Fast install, really friendly folks at every step of the process. We love our new windows!
Continental Siding Supply, Inc.
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Doorbell Installation questions, answered by experts

Yes, you can use too much bubble wrap. If you overdo it with the wrapping, it can strain the top of your box and break open the taped seal, risking the chance that the contents of the box could fall out or break. Use enough wrapping to fully cover your item without compromising the security of your box.

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

Installing insulation helps reduce energy usage, improve home comfort, and lower utility bills by maintaining stable indoor temperatures year-round.

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.

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