Is a radiant barrier better than insulation?

• <div><p>Radiant barriers and insulation serve different purposes, so one is not inherently better than the other. Radiant barriers reflect radiant heat, helping keep spaces cool, especially in hot climates, while insulation slows heat transfer through conduction. For optimal energy efficiency, it’s best to use both together. </p><p>Radiant barriers can enhance the performance of insulation by preventing heat gain in the summer and heat loss in the winter. The choice between them depends on specific climate conditions and the building’s design requirements.</p></div>

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>

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Last update on August 18, 2026

Reviewed in August 2026
I had some nice and polite installers here. We talked like friends, like we had known each other. They answered all my crazy questions & made me feel very comfortable with a big home improvement. We had a good time & lots of laughs. They even did it in one day!!
All Weather Seal of West Michigan Inc.
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Reviewed in June 2026
The installers that dis our windows were very friendly and efficient in their work.
All-Weather Seal of West Michigan
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Reviewed in April 2025
Quick service and installation. Work with us on price. Nice outcome.
Perfection Metal Roofing, Inc.
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Reviewed in September 2024
Great company to work with from start to finish...the installers were there on time and finished the shower install in 1 day as promised
Bathworks of Michigan, LLC
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Reviewed in February 2023
The install was fast; the operating instructions were totally understandable. The both guys both professionals AND personable.
1st Choice Water Solutions LLC
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Reviewed in March 2022
Fantastic company to work with! The installers, led by Dan were professional, knowledgeable and respectful. The project was completed fast and efficiently. I highly recommend them!
TUMMONS HEATING & COOLING
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Reviewed in August 2021
Order and install were as promised. Installer were excellent and professional.
Betterliving Sunrooms and Awnings of Northern Michigan
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Doorbell Installation questions, answered by experts

Radiant barriers and insulation serve different purposes, so one is not inherently better than the other. Radiant barriers reflect radiant heat, helping keep spaces cool, especially in hot climates, while insulation slows heat transfer through conduction. For optimal energy efficiency, it’s best to use both together.

Radiant barriers can enhance the performance of insulation by preventing heat gain in the summer and heat loss in the winter. The choice between them depends on specific climate conditions and the building’s design requirements.

According to a report from Energy.gov, radiant barrier installations can save between 5% and 10% on your energy bill each month that your HVAC cooling is in operation. That fact can mean savings of up to more than $325 per year for homes that experience frequent direct sunlight and high summer temperatures.

Insulation is professionally installed by measuring spaces, cutting materials to fit correctly, and placing them without gaps for optimal thermal resistance.

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.

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.

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