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 Cleora, OK 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 15, 2025

Reviewed in December 2025
Unfortunately, this is set up for just fence work. Jake did a gut and remodel and partiallybuilt a deck! He did not get it right and then he walked. He put post covers on, sent me pictures showing them on, then took them off and left them off. He didn't do the railing as instructed and said...
Trails End Roofing And Construction
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Reviewed in August 2025
50 percent of the estimated cost was paid to start the the project first to build a retaintbg wall second to replace a garage side door with a awning over the door to protect it from the weather next to repair a 20 ft roof over the back yard deck.additional concrete was poured for the garage...
Dream Builds Construction
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Reviewed in May 2023
They were prompt and got the job done. Courteous, clean, and called me Miss Cathy. Cleaned up afterwards. UPDATE: A trench digger was run and they broke the sewer line. Never told me about it or even tried to fix. I requested my breaker box be changed from 100 amp to 200. They left old one in...
Vibe Electrical Services, LLC
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Reviewed in May 2022
Roger was here promptly & ordered a part after 1st visit. 2nd visit Roger came out again to install part. He was very friendly and spent the time to assist me moving around the food in my freezer. That was above and beyond customer service.
Straight Edge Appliance Service & Repair
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Reviewed in February 2022
This company installed some fence for me! Answered all of my calls, were on time, did great work, all at a reasonable price!! Definitely give ‘em a call!!
Crawfords Fencing and Dirt Work
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Reviewed in April 2021
Hard working friendly crew who installed my roof and took exceptional care for detail with the install and the clean up. They were not the cheapest or the most expensive. I told them I'd call when I was ready and they were patient and was not pressured in any way. The professionalism they...
JSI Roofing
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Reviewed in February 2021
Amazing company! Has very competitive prices, explained everything quickly and concisely. They installed my water conditioner and purifier the next day and even fixed a lot of sloppy work that had been done by the previous installers of an existing water softener & heater. Highly...
H2O to Go
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Reviewed in December 2020
Installers were on time and did neat detailed work, cleaning up everything before they left.
Rain Guard of Tulsa, Inc.
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Reviewed in November 2018
On time for both estimates and work. Completed on time....installer was a great guy!
The Original Plumber, Inc.
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Reviewed in March 2018
Landis was very quick to contact us and came to do a free estimate timely as well. After we chose to install our ceiling fan we were quickly scheduled and the installer was early to the appointment. The Fan was installed quickly!
Landis Enterprises, LLC
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Doorbell Installation questions, answered by experts

A plastic vapor barrier should completely cover your basement to prevent water from penetrating through the walls. This typically goes before installing insulation to prevent moisture from building up and becoming trapped on the inside of your insulation, where it can collect and lead to mold damage. Installing insulation after the vapor barrier allows for any moisture to exit the walls for better ventilation.

One of the clearest signs that your insulation isn’t working as well as it should be is a noticeable difference in temperature throughout your home. One room might feel icy while another is hot as Arizona—this indicates that some parts of your home are either retaining or losing heat more than others. Additionally, a sudden increase in your energy bills, evidence of pests or rodents, or evident water damage are other signals that warrant a thorough inspection of your insulation and potential replacement.

The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years.

They recommend sustainable materials and water-saving fixtures, tailoring choices to balance sustainability and style.

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.

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