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 downside of radiant barriers?

• <div><p>The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important. </p><p>Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency. </p></div>

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Verified Reviews for Doorbell Installation pros in Fullerton, CA

*The Angi rating for Doorbell Installation companies in Fullerton, CA 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 June 25, 2026

Reviewed in June 2026
Great job installing master toilet. Quick and efficient! My tech was Alsonso who was very polite and left the job looking perfect. Best price for toilet install out of 3 quotes. Donna
RT Olson Plumbing, Heating and Air Conditioning
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Reviewed in August 2025
Absolutely flawless installation service. The personnel were pleasant and spent time explaining how to maintain the door. The end product is a high-quality installation that increases the value of our property.
Anaheim Garage Dooor
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Reviewed in June 2025
Hector did great on the installation!!
Felipe Handyman Services
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Reviewed in April 2025
Mark provided excellent service from the initial consultation to the installation. Had great communication throughout the process. His guys, Cody and Sam, came to install the door and they were both knowledgeable and very friendly. Would definitely recommend this team for your door installation...
SHOWCASE DOOR
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Reviewed in February 2025
Alvaro did a great job communicating with me about the installation date and he followed up afterwards to make sure everything was done to my expectations. Don’t hesitate to hire Ergeon, I was really impressed by how fast and professional the installation of my fences and gates. Thank you Alvaro!
Ergeon
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Reviewed in January 2025
They installed a hand railing at my front door that had to match the railing already installed ay my side door and they mailed it. Arrive on time, worked quickly and kept the work area neat. Swept up the after after they were done. Very happy with the job. 5 Stars.
H Q Welding Services
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Reviewed in July 2023
Mike was great! Quick install after we went to his showroom to pick out our flooring. The install team was efficient and respectful. Great experience!
Universal Floor Covering
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Reviewed in January 2023
Richard kept me informed with their progress in getting the product, and the installation was good.
Screen Me - Unlicensed Contractor
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Reviewed in July 2022
We had very professional, knowledgeable service . All questions answered right away and quick turn around from order to installation.
Ed's Soft Water, Inc.
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Reviewed in June 2022
Extremely quick installation and zero hassleâ ¦ two thumbs up
Flo-Electric
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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.

When installing board and batten siding, make sure there is wall sheathing and a moisture-resistant barrier installed. Behind that sheathing should be plywood or OSB for you to nail the boards and battens into. If there isn’t plywood or OSB, you can install vertical furring strips at 1½- to 2-foot intervals to nail the boards and battens to.

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

Reduces energy costs, improves comfort, and prevents ice dams in winter.

The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important.

Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency.

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