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 Cabot, VT 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 August 20, 2025

Reviewed in August 2025
Doug installed windows in our rental house. He also blew in insulation. He did a very good job.
Doug Hodge Company
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Reviewed in April 2025
Wonderful crew! Jeff, Ray, Wendy, Dave, Casey, Josh, Tony, Rich, Don, Francois, Nick, and the whole crew, thank you so much. They are experts in their field, personable, and professional. I worked in contracting for 32 years, so I am a tough customer, and these folks far exceeded my...
N A Manosh Corp
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Reviewed in June 2024
Travis had a lot of valuable knowledge on outdoor boilers and how to install them efficiently
Martin Excavation
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Reviewed in August 2023
The folks at Jay Mechanical were amazing! We got our quote quickly and within 3 days they were at the house installing our new hot water tank. The technicians were courteous and very considerate - even putting down drop cloths so no dirt would be on the floors. Their pricing was very fair and...
Jay Mechanical, Inc.
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Reviewed in August 2021
Fantastic! Alex was incredibly responsive throughout the preparation and installation process. I'm building an unconventional house, an Earthship, and it was an interesting challenge to bring together the original roof construction design, required updates, and the rubber roof requirements. Alex...
Big Als Roofing
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Reviewed in March 2021
Installation was professional and clean. They arrived early in the morning and were finished by lunch, the best part was there was no trash left around the house like other contractors after finishing a job. Side note, don't opt out of gutter covers, saves you a lot of hassle down the road just...
Snj Seamless Gutters
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Reviewed in October 2020
Eric is a true professional and master of his craft. I had him install a gravel driveway to access my land, and the result was outstanding. There was no pre-existing roadway, so Eric did all the excavation, as well as installing a large culvert for proper drainage. He also excavated and...
Gracie Masonry, LLC
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Reviewed in April 2020
In a word, "fabulous." Complete large bathroom remodel with a walk-in knee wall only shower, new kitchen countertops in two homes, and small bathroom countertop. Very responsive, professional, and fair. I suspect the bad reviews are the result of very unreasonable clients. When we had a problem...
Atlantic Stone Works Inc
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Reviewed in February 2020
I find Robert to be very trustworthy and his work is exemplary. He installed flooring while I was away and I left my keys with him. He assembled furniture, provided grounds work, and seems willing to help with anything I require.
Robert Rathbone Handyman
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Reviewed in October 2019
Hired them thru Home Advisor, they quoted the job, I accepted the quote, they gave me an install date and showed up as scheduled and did a fantastic job. Neat, clean, and complete!
SNJ Seamless Gutters
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Doorbell Installation questions, answered by experts

For your safety, you should always wear a mask when cutting batts of fiberglass insulation. We also recommend wearing eye protection, safety gloves, and long sleeves to protect your skin. Properly suiting up helps you avoid several fiberglass issues, such as cuts from the tiny shards of glass and inhaling small bits of fiberglass.

Insulating a detached garage won't reduce your home's heating or cooling bills—and insulating an attached garage will only have a small effect on your home's energy efficiency. However, insulating an attached garage can reduce the transfer of heating and cooling to and from the outdoors, which can reduce the amount of energy your home needs to stay comfortable. Also, having an insulated garage is just more pleasant. Balance the cost of insulating your garage with how you'll use the space to determine if the project is worth it.

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.

Yes, winterizing your mobile home is helpful for your safety and savings. Keeping your mobile home safe, secure, and warm during the winter will protect it against damage from harsh weather, which can lead to expensive repairs. Not only that, but winterization also helps to lower your energy bills by keeping warm air in and cold air out.

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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