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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Last update on August 10, 2026

Reviewed in August 2026
Text set up with NMB Electric for EV level 2 charger installation was quick & effortless. They planned using my submitted breaker/garage photos. Their suggested (highly rated) brand/model came from Amazon overnight. Jesus showed up as specified, fielded a few of my questions and had the...
NMB Electric
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Reviewed in November 2025
Beto did a great job installing seven interior doors in our house. Did quick and accurate work. I would hire him again in a heartbeat.
Elite Windows & Glass, Inc.
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Reviewed in October 2025
I couldn’t ask for better service and results. I needed to install a replacement wood slider door that also had to be stained to match my existing windows…….perfect!
EC Construction & Remodel, Inc.
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Reviewed in April 2025
Great job , very clean , on time , very friendly and pretty affordable prices. They surprised us , Maldin told us that they would install 6 interior doors in the same day and we were thinking it was going to take 2 or 3 days because of our experience with all our other contractors that we used...
MB WINDOWS CO
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Reviewed in February 2025
Excellent service. Arrived right on time. Went with me to return a generator which was incompatible with my home. Then went with me to purchase the correct generator. Installed the new one.
Gold Coast Power Inc.
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Reviewed in December 2023
We called at the last minute for 2 new faucets to be installed and JEM came to give a bid and was able to install right away. Great problem solving and workmanship. He's in our contact's now!!!
Handymen Professional. JEM - Unlicensed Contractor
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Reviewed in September 2023
Amazing and quick customer service. Corey came to my rescue to replace my lost car key, when my car dealer didnâ t respond. He is very friendly and professional and helped turn a stressful situation into a fun learning experience. I have continued to use him and his expert team of locksmiths...
Friedman Lock & Key
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Reviewed in December 2022
Felix & Santangelo not only arrived on time, they handled the installation and removal of toilet in record time. Great.
All American Plumbing & Drain
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Reviewed in November 2022
Kevin helped me install an EV charger in my garage. He had great communication skills, he was very knowledgeable on the million questions that I had asked him. I would definitely hire him again. Thanks again Kevin!
Kevin Konzmann
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Reviewed in July 2022
Great experience. Prompt, and did outstanding work on the installation. Best price for the type of system. I would definitely recommend.
Pro Water Solutions, Inc.
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Doorbell Installation questions, answered by experts

It's essential to use insulation materials specifically designed for air ducts. Common types of duct insulation materials include fiberglass, foam board, and reflective foil. These insulation materials have the right properties to withstand the temperature and airflow conditions within the ductwork. Using the appropriate insulation not only ensures efficient temperature control but also prevents potential safety hazards or the release of harmful particles into the air.

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.

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.

Through R-value assessments based on climate and existing 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.

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