Should you remove old insulation before adding new insulation?

• <div><p>You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.</p><p>However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.</p></div>

Does ductwork need to be insulated?

• <div><p>Insulating your ducts offers several benefits, including:</p><ul><li><p>Improved energy efficiency: Duct insulation prevents energy losses, reducing heating and cooling costs.</p></li><li><p>Cost savings: Lower energy bills make insulation a cost-effective investment.</p></li><li><p>Environmental benefits: Enhanced efficiency reduces your carbon footprint.</p></li><li><p>Consistent comfort: Insulated ducts help maintain a stable indoor temperature.</p></li><li><p>Better indoor air quality: Reduced allergens and pollutants improve air quality.</p></li></ul><p></p></div>

Do insulation companies need to be licensed?

• <div><p>In some areas, insulation companies require a special license, while some states only require them to hold general contractor licenses. Some municipalities may not mandate any license, although you should always ensure a contractor is fully insured. You can use Angi’s <a href="https://www.angi.com/angi-license-check.htm">license lookup tool</a> to confirm whether or not an insulation contractor you’re considering holds the necessary license for your area. You can also contact the company for information regarding licenses, certifications, and insurance.</p></div>

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Q: How do I know if my insulation needs replacing?

• <div><p>One of the clearest signs that your insulation isn&rsquo;t working as well as it should be is a noticeable difference in temperature throughout your home. One room might feel icy while another is hot as Arizona&mdash;this indicates that some parts of your home are either retaining or losing heat more than others. Additionally, a sudden increase in your energy bills, evidence of pests or rodents, or evident water damage are other signals that warrant a thorough inspection of your insulation and potential replacement.</p></div>

Q: What is the life expectancy of wool insulation?

• <div><p>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. </p></div>

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Verified Reviews for Doorbell Installation pros in Edgemont, SD

*The Angi rating for Doorbell Installation companies in Edgemont, SD 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 Edgemont, SD 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 January 09, 2026

Reviewed in January 2026
I hired April to clean my home due to being laid up from a surgery. She went above and beyond what I expected. My home looked and smelled amazing. I was also very impressed with her professionalism. Highly recommend!
April's Signature Cleaning Co
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Reviewed in August 2025
Jeff Storhaug and crew with Roofing Plus Construction did a fantastic job replacing the roof and vents. They were working in intense heat and completed the job.
Roofing Plus Construction, LLC
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Reviewed in April 2023
Great company to deal with would definitely use them again in the future.
Summit Seamless RainGutters
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Reviewed in July 2022
This professional called me the same day I notified home advisor and set up services for the next day. Anthony travelled over two hours to come to my home in 100+ degrees to fix my radon system. Thanks!!!
ALO Radon
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Reviewed in December 2021
I've used the service for 18 years and he did odd jobs for me. It was a good quality. I like his timely manner.
Antrim Enterprises
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Reviewed in February 2020
So far, no more scorpions! That's the best recommendation I can offer.
Friendly Pest Control, LLC
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Reviewed in September 2019
Roofing crew were very knowledgeable and did an excellent job. My house is a two story Victorian with dormers. several peaks and valleys. Quite challenging. They handled it very well. They kept me well informed as to what they were doing and why.
Swett Construction, LLC
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Reviewed in August 2018
Very happy with our new windows. The salesperson was friendly and very knowledgeable, and the installers were very professional, friendly and cleaned up their work areas. Highly recommend Renewal by Andersen and would use them again.
Renewal by Andersen of Rapid City
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Reviewed in July 2017
Sears did not want to make and install two kitchen cabinets I needed. They only wanted to install and replace all new only. That would have cost me thousands of dollars. I finally found a cabinet maker that was more flexible and he built and matched the new cabinets to my satisfaction.
Sears Home Improvements - Kitchens
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Reviewed in July 2017
We had him clean our guest room as our dogs urinated in it. he cleaned it and got the stains out they now look and smell like new again. He also cleaned a sofa we want to sell also two area rugs. All have been returned to like new condition. I would recommend him to my friends and family.
ABC Carpet Cleaners
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Doorbell Installation questions, answered by experts

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

Insulating your ducts offers several benefits, including:

Improved energy efficiency: Duct insulation prevents energy losses, reducing heating and cooling costs.
Cost savings: Lower energy bills make insulation a cost-effective investment.
Environmental benefits: Enhanced efficiency reduces your carbon footprint.
Consistent comfort: Insulated ducts help maintain a stable indoor temperature.
Better indoor air quality: Reduced allergens and pollutants improve air quality.

One of the clearest signs that your insulation isn’t working as well as it should be is a noticeable difference in temperature throughout your home. One room might feel icy while another is hot as Arizona—this indicates that some parts of your home are either retaining or losing heat more than others. Additionally, a sudden increase in your energy bills, evidence of pests or rodents, or evident water damage are other signals that warrant a thorough inspection of your insulation and potential replacement.

In some areas, insulation companies require a special license, while some states only require them to hold general contractor licenses. Some municipalities may not mandate any license, although you should always ensure a contractor is fully insured. You can use Angi’s license lookup tool to confirm whether or not an insulation contractor you’re considering holds the necessary license for your area. You can also contact the company for information regarding licenses, certifications, and insurance.

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.

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