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>

Can I use fiberglass insulation to soundproof a room?

• <div><p>We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. <a href="https://www.angi.com/articles/diy-dangers-fiberglass-insulation-hazards.htm">Fiberglass insulation is dangerous</a>, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.</p></div>

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Last update on September 05, 2026

Reviewed in September 2026
Left the place so you never knew they had been there. New windows installed in 2.5 hours. Professional.
Joyce Windows, Sunrooms & Baths of Asheville/Greenville
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Reviewed in June 2025
Robby Was great installing a wall mounted television…the BEST!!!
Audio Video Specialists
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Reviewed in October 2023
Devin N and Charlie R. Did a great job on the door installation!
West Shore Home Greenville
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Reviewed in June 2023
great job building and installing a new back kitchen and bathroom vanity
Tavares Custom Cabinets
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Reviewed in February 2023
My consultant, Jamie Duncan, was great! Any time I had a question, he was quick with an answer. When I had trouble signing into my installation portal, he help facilitate communication with the company! Such a pleasure to work with!
KR Solar
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Reviewed in May 2022
Superior installation, above and beyond the average knowledge.
Twisted Links Fence Co LLC
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Reviewed in February 2022
very efficient installation -- one day and they were through , pricey but prompt and kept me informed when there were delays because of weather
Quantum Roofing
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Reviewed in January 2022
Bought an older house that had been redone quickly & flipped. A real head scratcher as to why it was constructed in certain ways. Found Devin & Perry who helped us take care of all the issues we needed to make this home functionable & homey including: building a new set of stairs for a second...
CTE Builds
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Reviewed in February 2021
The quality of the garage door was very good. The installation went smoothly. We are very happy with the finished product.
Magnolia Garage Door Company
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Reviewed in September 2020
Very professional.Communicated well.Very satisfied with the end result.Happy with cleanup upon completion of the installation.
HomePro Mobility
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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.

We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. Fiberglass insulation is dangerous, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.

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

Reflective and high R-value batt or roll insulation are often considered energy-efficient, offering significant thermal resistance benefits.

One of the clearest signs that your insulation isn’t working as well as it should be is a noticeable difference in temperature throughout your home. One room might feel icy while another is hot as Arizona—this indicates that some parts of your home are either retaining or losing heat more than others. Additionally, a sudden increase in your energy bills, evidence of pests or rodents, or evident water damage are other signals that warrant a thorough inspection of your insulation and potential replacement.

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