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 best type of attic insulation?

• <div><p>The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation. </p><p>Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.</p></div>

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Verified Reviews for Doorbell Installation pros in Lamar, SC

*The Angi rating for Doorbell Installation companies in Lamar, SC 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 August 08, 2025

Reviewed in August 2025
I couldn’t be happier with the service I received! Handyman Stanley did an outstanding job installing my brand new AC unit. He was professional, punctual, and really knew what he was doing. The installation was smooth and efficient, and he made sure everything was working perfectly before...
Handyman Stanley
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Reviewed in September 2024
They did an excellent job and were very professional. Ray A and Carlos did an excellent job on the new shower. Thanks to Donoven Christian, Robbie, Mark Q and Mike for an outstanding installation on the windows, front door and the sliding patio door. Thanks again! T. Thomas
West Shore Home Columbia
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Reviewed in May 2024
Pleased with sod install. I referr to a friend. Very professional job.
Southern Design Landscaping, LLC
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Reviewed in December 2023
Val, Devo, Mike, and Wes were great! They got started as soon as they arrived and worked until the install was complete. They cleaned up after finishing and showed me the features of my new doors. I definitely recommend West Shore Home and this team of installers.
West Shore Home Wilmington
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Reviewed in December 2023
The customer service was amazing! They answered every question I had. Very direct and straight to the point and listen instead of talking over me. And the service was done in a timely manner and the pricing was very much affordable I definitely will be doing business in the future thank you!! I...
Falon's Neat Cleaning Service LLC
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Reviewed in January 2023
Adam is very easy to work with and communicated with me all the time through the process of it getting installed. He got it done as quick as he could and if not for the hold up on Lowe’s part he’d have gotten it done even faster.
Eagle Pro Construction, LLC
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Reviewed in January 2023
I was really pleased with the installation of my flooring. The job was complete in no time. Will definitely be hiring for future services ?
D-CO
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Reviewed in September 2022
Lee , Nick and Cody did the install. Great and professional job, would definitely recommend.
West Shore Home Myrtle Beach
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Reviewed in April 2022
Mr. Oakley returned to my house on 4/18/22 to install the springs for the garage door. I returned in just a short time and he was almost finished. My garage door works great and as it should. I would highly recommend him for your garage door needs.
CKC Designs
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Reviewed in August 2021
Charles was very professional and got my light fixtures installed quickly. I would definitely recommend him if you are in need of an electrician!
Smith Electric
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Top-Rated Doorbell installation pros in Lamar - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

The life span of fiberglass insulation can be as long as 80 to 100 years, but because of changing building codes, it’s best to get your insulation checked every 10 to 15 years. Signs of degrading fiberglass insulation include bits of batts on the floor or batts detached from frames. Having optimal, healthy insulation in your home will improve its energy efficiency, lowering your monthly bills.

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.

Periodic checks for moisture or pest issues ensure consistent performance.

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

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