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>

Does bathroom insulation need a vapor barrier?

• <div><p>Yes. Bathroom insulation requires a vapor barrier. As a matter of fact, bathrooms and kitchens are the two areas of the home that should always get a vapor barrier because of the excess moisture. If you don’t have a vapor barrier in place in these rooms, the moisture will build up and eventually lead to mold and bacteria, not to mention the destruction of the insulation.</p></div>

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Last update on December 01, 2025

Reviewed in December 2025
Installer was very clean, efficient, and was able to answer all my questions. Would recommend to anyone.
Just Right Heating & Air
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Reviewed in November 2025
Installed custom size door. Zack and Taylor were great, timely, professional, and easy to work with. Highly recommend!
We Fix Garage Doors
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Reviewed in October 2025
We needed everything done from the panel to the outlets and switch’s. They were even great enough to hook every light fixture and ceiling fan up. They installed exterior lighting for us and probably saved our lives, since the previous “electrician” had things hooked up carelessly. My husband...
MDG Electric LLC
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Reviewed in September 2025
Excellent service and customer service, good price, good installation crew, and someone calls a few weeks later to see how everything looks now that it is all installed. This was a winning situation.
Perfection Metal Roofing, Inc.
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Reviewed in July 2025
The guys came out on time , made quick work of the fence project. Installed new posts on Saturday came back on Sunday put up new fence materials and cleaned up all the old materials. Would call them again if I needed a job done.
Tye-Dye Worx
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Reviewed in June 2024
Very professional installation and professional service. We had a new ac heatpump and furnace installed, it's so nice to come home to a comfortable house again. We would gladly recommend Bryans Heating and Cooling to anyone looking for HVAC replacement .Thank You
Bryans Heating and Cooling, LLC
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Reviewed in February 2024
Impressed with the service offered by Ideal installers. Quality materials and expert installation. Communication was excellent, and the project was completed on time. Our home now stands out beautifully.
Ideal Siding Columbus
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Reviewed in January 2024
Very happy with installation of stove pipe from stove to ceiling
Hatton Brick & Chimney
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Reviewed in September 2023
From the time the salesperson came to consult with us, until the installation was completed. Logan Services made it a painless experience.
Logan Services A/C, Heat & Plumbing
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Reviewed in July 2022
I worked with Randy on a job in Columbus where there were metal panels to install. This job required some equipment to be fabricated up in certain areas to be able to install the panels. Randy was tasked with fabricating the equipment and did so in a very timely manner. The equipment was well...
Callahan Custom Fabrication
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Doorbell Installation questions, answered by experts

Insulating your home's exterior walls can realize up to a 20% reduction in your monthly energy bills. This means that regardless of how much the project costs, it can begin to pay you back immediately. Additionally, adding spray foam and other high-end materials can increase the selling value of the property.

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.

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.

Yes. Bathroom insulation requires a vapor barrier. As a matter of fact, bathrooms and kitchens are the two areas of the home that should always get a vapor barrier because of the excess moisture. If you don’t have a vapor barrier in place in these rooms, the moisture will build up and eventually lead to mold and bacteria, not to mention the destruction of the insulation.

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.

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