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 Clarkrange, TN

*The Angi rating for Doorbell Installation companies in Clarkrange, TN 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 Clarkrange, TN 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 May 21, 2026

Reviewed in May 2026
Chris was very polite. He was punctual and gave me plenty of notice of when he would be here. He installed two huge ductless heat a/c units. He was very knowledgeable and gave me options for different units. I saw him measure at least twice and used a level to ensure everything was level. I...
Worley Heating and Cooling LLC
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Reviewed in April 2026
Installed Jacuzzi shower in May 2023. Highly overpriced. They did not finish exterior wall they built, and shower has leaked ever since. Technician has been out 4 times to stop leak and shower is currently unusable, as they have said they need to reorder bottom rail. Would not recommend at all.
American Home Design, Inc.
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Reviewed in April 2026
Fast Johnny's is really good at what they do. They installed custom handrails for our stairs leading down to the basement and railings for the stairs outside. They were professional from the time they showed up to look at our projects and are detail oriented. We are extremely happy to have...
Fast Johnny's Welding and Fabrication
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Reviewed in January 2025
Justin Cook is very efficient and diligent in getting the job done. He installed a new septical and hooked up spare cable from our house to our barn. I recommend him for sure!!
Cooks Installs and Repairs
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Reviewed in October 2023
Showed up right on time - had everything needed for the job -worked well with me in installing a semi-difficult project. He cleaned up after himself & left me feeling good about the experience.
Madison Handyman LLC
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Reviewed in March 2022
Travis installed a Minisplit heating/air unit for me in my garage. He had everything installed quickly and it runs like a dream. He's been very helpful and knowledgable when I've had a question on it also. Highly recommend!
Knight Home Specialists LLC
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Reviewed in August 2021
Carmine completed a number of projects (painted pool deck, replaced kitchen faucet, replaced leather strip on bottom of exterior door, installed blinds in windows, re-chalked shower, replaced light fixtures by garage door, cleaned dryer vent, etc.). We're preparing our home for sale -...
Mr. Fix It Guy, LLC
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Reviewed in April 2020
Great service, quality and quick install. Cleaned up wonderfully. A veteran owned business worthy of your trust!
E-5 Construction
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Reviewed in September 2019
They originally installed my security system. When I moved they moved my security system and cameras to my new home. Very happy with the system, their advice and their professionalism. Always available to answer any questions that I have. I never had to wait for an appointment and I am over 2...
Smart Home Technologies
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Reviewed in April 2018
I would recommend Mr. Doss to anyone looking to have a fence installed. He returned phone calls quickly and will text if you prefer. The job took a little longer because the weather was absolutely horrible and worked against us every chance it could. Mr. Doss was at our home with every break in...
Doss fencing
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Doorbell Installation questions, answered by experts

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation.

It is generally completed in a day, depending on the attic size and access difficulty.

Open-cell foam insulation has a life span ranging between 15 to 25 years when well cared for. However, the material may degrade sooner in areas with high humidity or after prolonged water exposure. Proper installation and maintenance can maximize its longevity but requires close monitoring. Closed-cell foam insulation has a longer life span of 30 to 50 years.

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.

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.

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