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 the paper on insulation go in or out?

• <div><p>If you’re using faced insulation with paper, face the paper toward the inside of the room during the installation process. </p><p>A good way to remember this is that the paper should face the “warm side” as it’s the vapor barrier, meaning it should face toward where the heat will be coming from.</p></div>

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Verified Reviews for Doorbell Installation pros in Dover, NJ

*The Angi rating for Doorbell Installation companies in Dover, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

*The HomeAdvisor rating for Doorbell Installation companies in Dover, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

Last update on May 17, 2026

Reviewed in May 2026
Satisfied with the installation of Garage Door Opener.
Garage Door Technicians LLC
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Reviewed in November 2024
Installers were excellent!! Dependable. Friendly.
Express Flooring Dallas
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Reviewed in November 2024
Seamlessly!!! Great install. The workers were very knowledgeable and respectful. Install went smoothly and quickly. I would definitely hire them again. I have had them here twice so far for installs and we raking with the company was great, very prompt replies and also they updated me on times....
WoodLand Carpet & Floors LLC
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Reviewed in July 2024
Excellent customer service from quote to installation. The process was smooth and without any problems. Installers work non-stop to complete the project on time and always consult me at every step. very knowledgeable about the local regulations. I highly recommend this company for fencing...
Virtue Fence Co
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Reviewed in January 2024
Joseph and Sons installed slider door for my basement, they were terrific from beginning to end. I would hire them for future jobs again, and recommend them.
Joseph & Sons Construction, LLC
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Reviewed in August 2023
I was able to get an appointment quickly. They performed the installation of replacement smoke alarms without an issue & worked quickly & courteously. Price was a bit high.
TJ Electric
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Reviewed in June 2023
This is one of the best companies I ever worked with. Removed and installed a huge half moon window over my front door, meticulous, no mess, wonderful people. Looking forward to doing business again.
Quicken Glass LLC
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Reviewed in July 2022
They showed up right on time and completed the installation in the time estimated. Technician was excellent.
Door Works
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Reviewed in December 2021
What a nice guy! I had a small issue my battery went, Kevin came installed a new one, no charge the next day 10 AM, if you don't get a door from this guy you doing it wrong!!!!!!
KC Garage Doors, Inc.
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Reviewed in November 2021
The work was done in a very professional manner. They were on time and polite. The window install was clean and neat. The area was cleanup nicely. Could not ask for a better install.
BAS Construction
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Doorbell Installation questions, answered by experts

Yes, including recycled denim and cellulose from natural fibers.

Fiberglass is considered a favorite garage insulation choice due to its combination of affordability, ease of installation, and overall effectiveness. Fiberglass provides good thermal resistance, helping regulate garage temperatures and minimize heat transfer. Additionally, fiberglass is moisture-resistant, reducing the risk of mold or mildew formation.

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.

If you’re using faced insulation with paper, face the paper toward the inside of the room during the installation process.

A good way to remember this is that the paper should face the “warm side” as it’s the vapor barrier, meaning it should face toward where the heat will be coming from.

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.

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