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>

How do I add insulation to existing walls?

• <div><p>If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install <a href="https://www.angi.com/articles/blown-in-insulation.htm">blown-in insulation</a>. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than <b>$100</b>. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.</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 Cayucos, 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 July 11, 2025

Reviewed in July 2025
I recently had Good Neighbors Electric replace my old unsafe electrical panel and rewire my kitchen. They also updated lighting and installed new outlets. They were quick, professional, easy to communicate with, flexible with scheduling, and respectful of the space. They also charged me less...
Good Neighbors Electric, LLC
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Reviewed in May 2025
Chase was great! Excellent communication in providing a quote and leading up to the installation. Arrived early and was well prepared. Installed our ceiling fan quickly and safely. Took extra care to work in a tidy, efficient manner - even wiped the finger prints from the blades and ceiling. He...
RDK Handyman Services and Repair
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Reviewed in April 2025
I hired Ryan from Hotleg Electric to upgrade an electrical panel. While we had him there we also decided have him install some can lights and move a few switches around. The work in the panel was perfect. Everything was labeled clearly, and all the wiring was impressively neat. He cleaned up...
Hot Leg Electric
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Reviewed in January 2024
Jeff did a great job repairing my door frame and installing the new exterior door.
Cottage Industries Handyman Services
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Reviewed in January 2024
Will and his team installed 2400 feet of pipe and barbed wire fence and two gates for us. We had good communications with Will throughout the project and the results were excellent. Will use Will again for some fencing around the house.
RBS Welding and Fab LLC
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Reviewed in October 2023
Very well, excellent installer. Completed in a timely manner.
Hamon Overhead Door Co
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Reviewed in September 2023
Great customer service from design consultation to delivery and install. Thomas was very responsive to my questions and timely in construction and delivery of the queen wall bed unit. Very pleased with the result!
Murphy Wall Beds Unlimited
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Reviewed in July 2023
This was an installation of an EV circuit and a Tesla Wall Connector for non-Tesla vehicles. Markus was outstanding! He was competitively priced, on time, extremely responsive by email, text, or cell, and did a perfect installation! I will definitely use him again!
Link Electrix
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Reviewed in January 2023
Joe is on time, polite, and his work is precise and he cleans up after himself. I had him change all of my door casings and install new baseboard in my Master suite. I am very pleased with the outcome.
Redneck Rubbish Removal
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Reviewed in September 2021
Took some time to get delivery but when they did get delivered I was given ample notice to prepare the area, clear communication on when the installers would give notification of arrival. Installers obviously have significant experience and expertise and the project was completed expeditiously.
Renewal by Andersen of Oregon & SW Washington
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Doorbell Installation questions, answered by experts

Spreading tin foil over your windows works similarly to radiant barrier insulation, but not as well. It will reflect some of the sunlight that would otherwise come through the glass and warm up the inside of your home, so it might help a little to keep your home cool in the summer. However, the appearance isn’t preferable to blinds or drapes that can offer the same benefits. You might also consider tinting your windows instead, which is a more aesthetically pleasing change that can still block a good portion of the solar heat coming through your windows.

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.

If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install blown-in insulation. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than $100. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.

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.

Improves water efficiency, reduces oversight, and enhances landscape health.

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