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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Verified Reviews for Doorbell Installation pros in Waldo, AR

*The Angi rating for Doorbell Installation companies in Waldo, AR 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 Waldo, AR 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 October 10, 2025

Reviewed in October 2025
Needed to get my new shop insulated and called 4 States, their work was fast and efficient! The changes that the insulation made were huge!
4 States Spray Foam LLC
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Reviewed in June 2023
On time and very respectful of the home .
Southern Carpet Cleaning and Maintenance Services
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Reviewed in September 2022
Perfect. They worked within my timeframe and performed the work while I was out of town. They also cleaned the work area after the job was done
Larry Martin Roofing
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Reviewed in February 2022
He is sooooooo dayum good at his craft I would hire him a million times over again!!!! Thank you so much
Carrier Drain & HVAC
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Reviewed in June 2021
Very professional and always on time!
Jackson's HVAC and Appliance
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Reviewed in April 2021
The gentleman that came out went above and beyond to make sure the job was done and done right. Would highly recommend to anyone needing their services.
A Trac Excavation & Septic, LLC
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Reviewed in July 2013
I sold my house about 3 weeks ago. After 3 years, he had yet to install the cover on the hop. He installed the a/c unit properly, but did not complete the contracted job fully. He got mad at me for calling repeatedly in the same morning. He said that I was doing nothing but making him mad. Even...
Reid's Quality Service
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Reviewed in September 2011
They were excellent to work with. They knew what they were doing with the installation and it went great.
STOREY'S FLOOR & CARPET
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Reviewed in June 2011
This summer our AC began giving us some problems. David and his folks made several service visits (always responding promptly to our calls.) Finally they recommended that we really needed to replace our very old A/C. After looking over our system, they told us we didn't really need a new...
LAFFERTY'S SERVICE CO
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Reviewed in June 2010
It goes well. My A/C stopped blowing cold air, he came and discovered that the unit needed some freon and cleaning out, he did that and he comes back to check that it is working ok and top off freon if needed. I bought new chandeliers and he installed them for me as well as new light fixtures...
Jeffrey Hardwell
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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.

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.

While not every wall requires a vapor barrier, if you do need one and don’t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.

If you plan on heating your garage, you must install a vapor barrier when drywalling the garage. A vapor barrier protects your garage from frost and mold that can occur through condensation. If your garage is unheated, you don't need to install a vapor barrier. The only exception is if you regularly crank the heat in your car before getting in it. In this case, you may still want to install a vapor barrier, as your car can heat your garage.

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