Should I remove old attic insulation before adding new?

• <div><p>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: </p><ul><li><p>If the insulation is over 15 years old</p></li><li><p>If the insulation is wet or moldy</p></li><li><p>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></p></li><li><p>If you see signs of pest infestation</p></li></ul><p>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</p></div>

What are the four common types of insulation?

• <div><p>While there are many different kinds of insulation, spray foam, blown-in, foam board, and batt and roll are the four types you’re most likely to see. That doesn’t mean they’re alike, though. Each one varies drastically in terms of cost, materials used, and how they’re installed—not to mention, how well they limit heat transfer.</p></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

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, they address underlying issues, providing long-term seals and energy savings you might need help to achieve.

Insulation is professionally installed by measuring spaces, cutting materials to fit correctly, and placing them without gaps for optimal thermal resistance.

Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2.

While there are many different kinds of insulation, spray foam, blown-in, foam board, and batt and roll are the four types you’re most likely to see. That doesn’t mean they’re alike, though. Each one varies drastically in terms of cost, materials used, and how they’re installed—not to mention, how well they limit heat transfer.

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