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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Last update on August 20, 2026

Reviewed in August 2026
Oniel did an amazing job replacing my fence and installing and wiring new ceiling fans throughout my home. The work was professional, efficient, and completed with great attention to detail. I'm extremely happy with the results and would definitely hire them again. Highly recommended!
Home Complete Solutions LLC
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Reviewed in June 2026
We are very pleased with the attention to detail and the quality of work. The installer did exactly what he had promised at a fair price.
Superior Gutter LLC
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Reviewed in April 2026
Installed a mini split in my bonus room, which was 25 feet off the ground from the outside unit and not simple for wiring and copper. Had no issues and made everything look neat. Got the unit installed quickly and saved me money on some helpful suggestions.
Lynn Inman Cooling & Heating
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Reviewed in May 2025
Home Complete Solutions took on a project to repair the siding around our roof due to water damage. I called and within 3 days the project was complete. They were very professional and did everything we needed done in 1 day. We will be looking into using them again for a privacy fence install in...
Home Complete Solutions LLC
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Reviewed in April 2025
Professional, puntual and incredibly skilled. Installed our gazebo perfectly! The whole process was smooth from start to finish. Highly recommended if you want someone reliable and experienced.
Helping Hand
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Reviewed in July 2024
He also built my stair way to my upstairs, installed all my interior doors, finished my electrical in the garage and also hung my plywood in the ceiling of garage.
Level Up Construction
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Reviewed in June 2024
Jason worked with all my requests for our wood privacy fence. He listened to my concerns about keeping our husky fenced in and installed a beautiful, well-made, and secure fence! We get compliments all the time! You can trust him to get the job done and done well. Highly recommend!
Yard Pros
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Reviewed in August 2021
I could not be more pleased with Accent Outdoors! The owner was very friendly and informative. He came out and gave us an estimate and timeline, both were spot on. His carpentry skill is quite incredible and I am satisfied, knowing that I have a fence that will last many years. I even had...
ACCENT OUTDOORS
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Reviewed in December 2019
Arrived on time. Very courteous. Finished installation in timely matter. Cleaned area and locked door when finished. Very professional.
East Coast Mechanical
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Reviewed in August 2019
If you want an honest dependable contractor you need to go no further. Air max has worked for me with new installations for some of my investments and also repair and maintance for 10+ units for our church.
Air Max, LLC
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Doorbell Installation questions, answered by experts

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

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.

Yes, including recycled denim and cellulose from natural fibers.

When installing board and batten siding, make sure there is wall sheathing and a moisture-resistant barrier installed. Behind that sheathing should be plywood or OSB for you to nail the boards and battens into. If there isn’t plywood or OSB, you can install vertical furring strips at 1½- to 2-foot intervals to nail the boards and battens to.

DIY insulation installation is feasible, particularly for basic rolls or batts, if you have the right protective gear and knowledge. However, hiring a professional ensures even, full coverage for maximum efficiency.

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