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>

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>

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Verified Reviews for Doorbell Installation pros in Sugarloaf, CA

*The Angi rating for Doorbell Installation companies in Sugarloaf, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

*The HomeAdvisor rating for Doorbell Installation companies in Sugarloaf, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

Last update on May 18, 2024

Reviewed in May 2024
Benicio and his team did an excellent job installing our cedar wood fence: - responded very quickly to my Yelp message - came the next day for an estimate - gave an on-the-spot, competitive price for what I wanted - did the work on time, quickly, to a high standard
B&D Construction and Painting
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Reviewed in May 2024
Hot Springs Pools hired GVL to build me a large retaining wall, with 4 stairs in the middle, that is absolutely beautiful! I meet Mick while they were building the wall and asked him if he could prep the soil and install the sod from the pool installation. GVL was easy to work with and did an...
GVL Landscaping
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Reviewed in February 2024
My system was installed in March of 2012. Had a great selling agent. Very patient and explained everything. In fact most of the Culligan personnel have been congenial. It was only accidentally discovered recently that only a portion of the system had been installed. I was never told they...
Culligan of Ontario
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Reviewed in January 2024
Very pleased with the final install. The Workmen were professional and cleaned up after the project
Earthquake Bracing, Inc.
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Reviewed in December 2023
They were amazing to work with. Julio helped find a solution to our unique property and heating needs. Emilio and his installation team were very accommodating, and worked very hard to get all the work done in a short period of time. I couldn't recommend them more.
One Stop Heating and Cooling
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Reviewed in July 2023
JZL Designs did some designed and installed custom cabinetry for my home. They were very responsive and the works was fantastic. I couldn't be happier with their work.
JZL Designs, Inc.
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Reviewed in July 2022
We hired Adrian from All Valley Hauling & Demo to install a glass shower, paint patio railing, shim kitchen cabinets, and tile a small balcony and we had to do touchups on almost all of the work that was done. Attention to detail needs improvement and left a messy work area for us to clean....
All Valley Hauling & Demo - Unlicensed Contractor
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Reviewed in June 2021
Five star customer service. Offering quality windows and installation. Best window company and discount prices. Very professional. They do what they say.
American Window Company
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Reviewed in May 2021
Punctual, honest and professional. If you're looking for a garage door expert, Edi is your man. We called him on a Saturday morning seeking a quote for a garage door opener. He came right on time -- within a half hour or less of the call -- and we booked him for a Monday installation. He did a...
EM Garage Doors And Gate Service Inc.
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Reviewed in November 2020
They solved a problem that was from the original installation of the plumbing. The concret floor had to be dug up and correct fittings and lines put in. Large job and well done. They were promt and effeciant in their work and scheduling. Would recommend this company.
A A A Reasonable Plumbing
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Top-Rated Doorbell installation pros in Sugarloaf - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

The life span of insulation is between 20 and 100 years. At that time, existing insulation can fall victim to gravity, resulting in compression, which reduces its insulating protection or R-value. If you can't simply add more insulation over the existing material, removing the old to increase the effectiveness of the new can reduce your energy bills and make the project worth the time and money investment.

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.

Mineral wool has an excellent life expectancy of up to 50 years, provided it's kept dry and free of pests. Compared to fiberglass, with a life span of 20 to 30 years, mineral wool stacks up well for long-term cost savings. Sheep wool maintains a similar life span to fiberglass, while estimates for hemp wool insulation life expectancies are all over the board, ranging anywhere from 20 to 100 years.

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.

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

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