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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*The Angi rating for Doorbell Installation companies in Harrison, ID 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 22, 2026

Reviewed in June 2026
In early May, I contacted Straight Shooter Plumbing because a toilet and bathtub on my property were backing up with sewage. The technician recommended removing the toilet and using an auger to clear the line, which I approved. Shortly afterward, I discovered the technician had broken my shop...
Straight Shooter Plumbing and Rooter LLC
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Reviewed in December 2025
Cole did an awesome job installing a tankless water heater in a home where it was difficult to find a suitable installation location. His pricing was fair & he is a pleasant person to work with. 5-Stars.
Buckaroo Plumbing
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Reviewed in September 2024
Eduard, the owner of E&E Electric transformed my spec home into one that people think was custom built home upon entry. I had him either change existing fixtures or install new circuits, chandeliers and switches literally in every room. The best thing about the entire two week job was that...
E & E Electric LLC
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Reviewed in January 2024
Service requested: Installation of new windows and sliding glass door. Quality: Anderson Windows are of the the highest quality; the glass is so clear it's as there is no glass and the frames/seals are first rated. Value: In maintaining a property especially one in a remote location it...
Renewal by Andersen of Washington
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Reviewed in July 2022
We are very satisfied with the new composite deck and cable railing installed by Bugle Construction. The finished product has exceeded our expectations! Mike was easy to work with from doing site survey and understanding what we wanted to have done, to providing an estimate and providing status...
Bugle Construction JMJ, LLC
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Reviewed in February 2022
I spent 12 years on the real state field and I flipped the remodel of 17 high end homes and I would put James on the top of my list for cabinets installation, I have work with many providers but James is a really good professional
James Willard Finley
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Reviewed in September 2021
We were somewhat skeptical that these windows could justify the cost and meet the workmanship and efficacy our salesman claimed, but our expectations were exceeded with the way our job turned out. We had a large job (33 windows) our installers (Jared Boesl, Kyle Boesl, AJ Sebek and Dustin...
Renewal by Andersen of Washington
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Reviewed in May 2021
Due to covid etc there was delay in getting materials but it was ok since weather was better later. All through this I was kept informed of progress. Installation was just completed and it is beautiful.
Fireside Windows, LLC
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Reviewed in April 2021
Timely response to initial inquiry and then stayed in contact. Stayed on schedule. The quality of work was more than we could expect. Matt listened to what we wanted, gave us options, and made it happen. Installed new hardwood floors to match existing hardwood and then refinished old floors...
Character Hardwood Floors
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Reviewed in August 2018
The technician was polite and cleaned up the area after the mitigation fan installation. He was proactive and pointed out plumbing deficiencies he observed while working. I was very grateful as it eliminated a potential crisis situation.
Aqua-Max of Maine
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Doorbell Installation questions, answered by experts

When it comes to fiberglass insulation versus foam board, there are a few notable differences, both aesthetically and functionally. Fiberglass insulation is soft and flexible, meaning it can be squeezed into tight spaces more easily than foam board. Fiberglass insulation also has a higher R-value, making it a better pick for colder climates. However, foam board insulation can resist moisture and pest damage much better than fiberglass.

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.

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.

Fiberglass is the best insulation for HVAC ducting because it's inexpensive, widely available, versatile, and long-lasting. Fiberglass also offers acoustic insulation in addition to thermal insulation, which can contribute to a more peaceful home environment. You can use other materials like mineral wool, but fiberglass is the industry standard.

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.

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