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 is the best type of attic insulation?

• <div><p>The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation. </p><p>Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.</p></div>

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*The Angi rating for Doorbell Installation companies in Fayston, 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 28, 2025

Reviewed in August 2025
He called to set up a date to look at my house and see how to install the heat pump. He then had a date and installed the heat pump. He was on time, answered all my questions and was very professional. I would hire him again in a minute!!
Lone Wolf Energy, LLC
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Reviewed in July 2025
Mad City Windows & Baths installed all new windows in my house last Tuesday. Rich & Hunter Rager & John Holliday did a fantastic job with the install and had it done in a day! They were pleasant & efficient as was Dustin Arnold, the field rep who came becuz I had an issue with what I was...
Mad City Windows & Baths
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Reviewed in June 2024
Top quality retrofit and installation of insulated ductwork for heat pump, air Conditioning , and furnace system. Soup to nuts. Terrific work, price, and responsiveness.
Paradise Heating and Air Conditioning
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Reviewed in August 2023
Customer service is superb. They pick up the phone every day. Gutters are working perfectly. Installers did the whole project in less than 4hours.
LeafGuard
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Reviewed in March 2023
Paul and Matt did a great job with our basement renovation - installing drywall, doors, a closet, and painting. Paul purchased all the materials, provided detailed invoices and was communicative throughout the whole process. He also began the project on very short notice and did great work at a...
Paul Winauski
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Reviewed in September 2022
John and his team installed a concrete pad and pavers for our new hot tub and patio. They provided professional and friendly service and had the job done in no time. Everything looks great and I will hire them again!
Hovnanian Landscape Excavation
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Reviewed in April 2022
Very professional, efficient and courteous company from quoting to install. Very happy with the entire experience!
Greenland Masonry
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Reviewed in February 2021
Ben came out and was super helpful as we thought through where to add new outlets, sconces, lights, and ceiling fans. After we completed that installation, we had the crew out again to install ethernet cable and support electrical elements of a kitchen renovation. Crew was professional,...
Benjamin Electric, Inc.
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Reviewed in April 2020
Mark was quick to reply to our questions, patient in delaying our job while we waited for cabinets to be installed at our site, completed the job to our happy satisfaction and was priced right too! Couldn't recommend more highly! The countertops are lovely, workmanship was great! Thank you,...
All American Stoneworks, LLC
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Reviewed in February 2020
It was pretty bad, they didn't ask the right part and they kept charging us. They seemed knowledgeable with their work, but they just installed the wrong part.
Peak Mechanical
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Top-Rated Doorbell installation pros in Fayston - Updated Nov 2026

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Doorbell Installation FAQs, 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.

Depending on the item, several different materials are beneficial for long-term storage. Bubble wrap and plastic wrap help ensure delicate ceramics or furniture are safe and secure. High-quality moving boxes made of durable materials like plastic also help ensure the longevity of your storage, as cardboard will degrade faster over time.

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

The most affordable way to insulate a garage involves choosing cost-effective materials like fiberglass, which comes in batts or rolls and is relatively easy to install. You can often install this type of insulation without needing to add drywall, which helps reduce costs. While a DIY approach might seem cheapest, hiring a professional installer can be highly cost-effective. Experts can accurately determine your garage's specific insulation needs and ensure the best results for your investment, often using batt insulation for the bulk of the project.

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