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>

Does ductwork need to be insulated?

• <div>Insulating your ducts offers several benefits, including:<ul><li>Improved energy efficiency: Duct insulation prevents energy losses, reducing heating and cooling costs.</li><li>Cost savings: Lower energy bills make insulation a cost-effective investment.</li><li>Environmental benefits: Enhanced efficiency reduces your carbon footprint.</li><li>Consistent comfort: Insulated ducts help maintain a stable indoor temperature.</li><li>Better indoor air quality: Reduced allergens and pollutants improve air quality.</li></ul></div>

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*The Angi rating for Doorbell Installation companies in Salem, 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 July 17, 2026

Reviewed in July 2026
The work was done in a timely and very professional manner. The patio looked really nice when completed. We would highly recommend J & M and would hire them again. They were very accommodating and met all our needs.
J&M Concrete
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Reviewed in February 2026
I needed help with a minisplit install, and David was on top of it. He had all the required tools, and was a huge help in getting it installed and ready for the electrician. A+
Poston Handyman & Remodels
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Reviewed in June 2024
Had c&g pluming come out and give me an estimate on installing a new sink and faucet as well as a toilet and look at a few things I had concerns about and they quoted me a good price and I let them start the work and Iâ m amazed with how well everything turned out and how professional and...
C & G Plumbing
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Reviewed in April 2024
Work included framing, installation, decorative wood working and custom design work. Best contractor I have ever worked with and I have used him on small and large scale projects for over 3 years.
Evergreen Building Solutions
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Reviewed in November 2023
He also did a good bit of tree trimming and brush removal. I have already hired him again for another project.
Enloe's Logging and Landscaping
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Reviewed in September 2021
After researching Continental Siding through the Better Business Bureau, we found that everything was rated very well and we thought it would be great company to choose for our siding project. We chose to go through Continental Siding after getting multiple company comparisons and found out...
Continental Siding Supply, Inc.
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Reviewed in September 2021
These guys were wonderful to work with. I kept adding other things that I wanted done and they jumped up and did the work. Kept the area cleaned.
Ritzco Tree Care
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Reviewed in November 2017
Jim and Joe were great to with. Toilet got pushed through the wall, so not only did I need it replaced, but I also needed drywall repair! Here comes Joe to the rescue. He fixed the wall and painted and then was able to get him back to complete the toilet install. My only criticism is that I...
Meinert Plumbing, Inc.
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Reviewed in February 2017
Great work, professional, went out of their way to earn my business. Adam was timely, neat, installed water softener and UV filter and cleaned up after he was finished. Walked through the system and insisted I call if I have any questions in the future.
Ecowater Midmo
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Reviewed in September 2012
Great Service! Called to ask for quote and came out within 48 hours. When we called to ask for installation, he informed us, unlike other providers we have worked with in the past, that he had a full schedule that week but would be able to come out the following week. He and his team came. They...
Rainbow Siding & Seamless
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Doorbell Installation questions, answered by experts

Insulating windows without plastic is usually the better method. Outside of simply replacing your windows, you could buy cellular shades, which trap air between the window and the home, add a window film that blocks UV rays and traps heat, or cover your windows with a low-emissivity coating called “low-E.”

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.

Insulating your ducts offers several benefits, including:

Improved energy efficiency: Duct insulation prevents energy losses, reducing heating and cooling costs.
Cost savings: Lower energy bills make insulation a cost-effective investment.
Environmental benefits: Enhanced efficiency reduces your carbon footprint.
Consistent comfort: Insulated ducts help maintain a stable indoor temperature.
Better indoor air quality: Reduced allergens and pollutants improve air quality.

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

Ductwork should be wrapped in insulation in certain locations. This includes unconditioned interior parts of the home, such as attics, crawl spaces, basement ceilings, and between floors. Duct joints should also be insulated since they're more likely to leak air than other parts of your system. Building codes in some areas also require ductwork to be insulated.

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