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 June 02, 2026

Reviewed in June 2026
Mirrored closet doors installed. Good job!
R.R.R LLC
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Reviewed in January 2025
Punctual, helped me pick my door and also installed.
A-Team Garage Door Service, LLC
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Reviewed in October 2024
This project was on-time, professionally executed from the initial sales visit to the post installation call. The installation team was clean, courteous, and very skilled. We love our new patio door!
Illinois Energy Windows & Siding, Inc.
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Reviewed in June 2024
I was interested in a new garage door quote and when tech came out I told him I had purchased the opener and was waiting to get the garage floor fixed and have a new driveway installed before the garage door was installed so it didnâ t get damaged during the work and he offered to install my...
ProLift Garage Doors of Plainfield
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Reviewed in December 2023
Matt at Installect Solutions responded to my request in less than 2 hrs! He understood the issue with my security doorbell camera and dispatched a service person within 24 hrs! The repair was made quickly and at a very reasonable rate. I’m pleased with their work ethic and highly recommend them!
Installect Solutions
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Reviewed in October 2023
Excellent installation and service. Recommended to my neighbor.
Water Works, Inc.
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Reviewed in July 2023
On time, professional install with excellent communication
EDM Garage Doors
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Reviewed in September 2022
The window was expensive but seems to be of good quality. Craig the installer done a great job. I'm happy with the window and installation.
Kraz Construction, Inc.
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Reviewed in April 2022
Professional and courteous from office to installer.
Bath Planet of Fort Wayne
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Reviewed in March 2022
Tom installed my outdoor ring security system. He was very excellent and professional at doing the ring install. His fee was very reasonable. Definitely get this guy to do your job.
Dupage Electric
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Doorbell Installation questions, answered by experts

Improves water efficiency, reduces oversight, and enhances landscape health.

Yes, usually you will need some kind of vapor barrier on the exterior walls when the framing is attached to concrete and masonry surfaces.

Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2.

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.

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