Should you remove old insulation before adding new insulation?

• <div><p>You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.</p><p>However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.</p></div>

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*The Angi rating for Doorbell Installation companies in Bennington, 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 April 26, 2026

Reviewed in April 2026
We would highly recommend 24/7 Home Improvement Services. We would like to Thank Bob at 24/7 Home Improvement Services for the hard work he put in installing our new EPDM roof. We couldn't be happier or feel more confident in the work he has done.
24/7 Home Improvement Services
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Reviewed in April 2025
This is the team to call for any kind of home projects Matt and Britney did a great job measuring and installing a storm door for me. They are fast, responsive, knowledgeable, and have good rates. No hesitation to hire them again for future work. Glad I found them!
Stimpson's Home Improvement
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Reviewed in April 2025
Josiah and his team came in to do drywall installation as well and prime and paint. They are an A+ team to work with. Communication was great as well as the quality of the work. We had some challenges with other contractors that they worked around. Due to the other contractors Josiah wasn’t able...
Durf's Interior Solutions
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Reviewed in August 2024
George came to look at my electrical issue the same day i called. He looked it over, showed me what was wrong and what he needed to do to fix it. He came back two days later and took a decades old, unsafe cobbed up mess and restored it to a safe installation that looks good and works great!...
Koletas Electric
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Reviewed in April 2023
Generator installed today ahead of scheduled date. The two guys were super nice and kept me informed of everything they were doing. They cleaned up after themselves, and before they left went over all aspects of the generator. Also told me if any questions don't hesitate to call. Very very...
Hurricane Home Solutions, Inc.
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Reviewed in January 2023
Dave replaced our water heater which was connected to our oil fired boiler, with a new electric hot water tank. We had no problems. Very professional installation.
Dave's Plumbing
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Reviewed in October 2022
We hired Mr. Waterman earlier this year to remove a stone wall, grade and pave the area behind our house. Halfway through this process I asked him about adding a garage. So we agreed that he would install a two car steel building for a garage. To say that he and his crew have done an OUTSTANDING...
Waterman Paving
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Reviewed in May 2022
Very satisfied with the work done to replace and install a hot water heater. Timely, professional, knowledgeable, and fair. Will definitely be hiring this company again for future jobs. Thank you!
M J Digby Plumbing & Heating
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Reviewed in June 2021
They showed up exactly when they were supposed to, and finished the job in a very short time. They installed a retractable awning on our patio and put a small awning over one of our doors. I would hire them again and would rate them a 5 out of !
The Reynolds Group
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Reviewed in August 2020
Joe Mazza did a great job installing my tile floor. I will use his services in the future,
Precision Building & Remodeling
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Doorbell Installation questions, answered by experts

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation.

Ensures uniform application and maximizes insulation effectiveness and energy savings.

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.”

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

Through R-value assessments based on climate and existing insulation.

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