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 Erwin, NC 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 Erwin, NC 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 January 20, 2026

Reviewed in January 2026
Noel and his team did an excellent job on the installation No details were missed and the job was completed quickly. It looks great! Thanks for doing a great job!!
A & M Premier Roofing & Construction
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Reviewed in December 2025
This company did a great job installing my 6' privacy fence with cap board and facia trim. They were affordable and the turnaround time was amazing from start to finish they met my expectation. The pups are happy now to run free in their Yard. We be definitely use them again. Would recommend to...
J&J Construction of Raeford LLC
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Reviewed in July 2023
John installed an exterior door for my elderly mother who has dementia. Not only did he do a fabulous job for a fair price, but he was patient and understanding while working in her home. He won her over and that’s not an easy job. I will definitely call him in the future.
John Gaster Construction
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Reviewed in August 2022
The experience was incredible. The professionalism that was extended from the initial ring of the doorbell to the final cleanup was above and beyond what we expected. Hats off to everyone involved, especially the installers.
The Remodeling Company LLC - Raleigh
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Reviewed in May 2022
The install went very well, I am extremely happy. He showed up on time and was very polite and professional
GetIT Service and Installation
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Reviewed in February 2022
Luke and Dustin did an excellent job installing our new patio doors. The installation was done in a timely manner, looked great upon completion and the clean up afterward was fantastic. The installers were courteous and professional. Would highly recommend this company.
West Shore Home Raleigh-Durham
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Reviewed in August 2021
Very prompt in responding and with quoting the job. He arrived on time and did a good installation
Cyber Dish, Inc.
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Reviewed in August 2021
We were not notified what day they would do the installation of our fence. They just showed up one day. Luckily we were home so they we able to do the installation.
Season to Season Landscaping
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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.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

Yes, winterizing your mobile home is helpful for your safety and savings. Keeping your mobile home safe, secure, and warm during the winter will protect it against damage from harsh weather, which can lead to expensive repairs. Not only that, but winterization also helps to lower your energy bills by keeping warm air in and cold air out.

The time required for insulation installation can range from a few hours to a few days, with most projects taking 1-3 days to complete. The final duration depends on the project's size and complexity, the area size, and the type of insulation being installed.

Monolithic slabs don’t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.

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