Should I remove old attic insulation before adding new?

• <div><p>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: </p><ul><li><p>If the insulation is over 15 years old</p></li><li><p>If the insulation is wet or moldy</p></li><li><p>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></p></li><li><p>If you see signs of pest infestation</p></li></ul><p>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</p></div>

What is the downside of radiant barriers?

• <div><p>The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important. </p><p>Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency. </p></div>

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Verified Reviews for Doorbell Installation pros in Oran, MO

*The Angi rating for Doorbell Installation companies in Oran, MO 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 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 January 2025
I had them come out to replace my toilet and repair my toilet flange. I bought the toilet and they provided the flange. First visit, a young guy came out and was nice however once he was done my toilet was leaking very bad from the base. I had them come out a second time (this time a more...
Hacker Plumbing & Heating
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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 August 2024
Installed a water main on my property, all the way into the house. Excellent and professional. Completed the job in no time! Would hire again for other jobs!
DTR Farms LLC
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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 November 2019
Came prepared when he met with me so decisions could be made quickly and the install is so pretty and professional!
Heartland ProGutters, LLC
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Reviewed in December 2017
called with early availability, then arrived on time, very professional, installed new a/c, handler & plenum, system is awesome. Great company and will hire again as needed and definitely HIGHLY recommend!!!
Polar Bear Air
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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 January 2015
John Heise came to my location for a site survey. He submitted a written proposal the same day. I accepted the next day, and his crew did the installation two business days later. They were totally professional, completing the installation in a minimum amount of time, and they left no mess...
HEISE HEATING & COOLING INC
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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.

Structural insulated panels and rigid foam boards have the highest R-value of any insulation that contractors commonly use, with R-values reaching up to around 8.0. These types of insulation are best in extremely cold climates, but they’re generally preferred for new construction, as they can be challenging to retrofit. Blown-in and loose fill insulation provide the next best insulative value, provided the installation is done properly. It’s important to choose an insulation type that meets your needs based on climate, as maximizing R-value may not always be financially worthwhile if you live in a moderate climate.

Air duct insulation typically lasts for 10 to 15 years or even longer, depending on the material and maintenance. It's important to conduct periodic inspections to check for signs of deterioration, such as water damage, tears, or general wear. If you find any of these issues, it may be time for repairs or a full replacement. You might also consider upgrading your insulation even if it's in good shape to improve your home's energy efficiency and enhance your HVAC system's performance with newer, more effective materials.

The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important.

Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency.

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.

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