Should I remove old attic insulation before adding new?

• <div>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: <ul><li>If the insulation is over 15 years old</li><li>If the insulation is wet or moldy</li><li>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></li><li>If you see signs of pest infestation</li></ul>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</div>

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Verified Reviews for Doorbell Installation pros in Brandon, MN

*The Angi rating for Doorbell Installation companies in Brandon, MN 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 Brandon, MN 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 19, 2026

Reviewed in May 2026
They installed a well pump in January. Took them about 2 hours. Well pump cost around $400 they demanded payment of $8000 due to working in Cold weather. When I questioned it that got extremely rude and bullied me into paying. I should have gotten a quote upfront and didn&#39;t. I sure would...
Klimek Bros Well Drilling
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Reviewed in February 2024
We are very thankful we chose Mad City. From the very beginning when we met with their team, they were kind, courteous and helpful. But above all the line of communication was always open and punctual, which is important when dealing with costly home projects. The team that installed the...
Mad City Windows & Baths
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Reviewed in September 2022
Trevor did an outstanding job installing a "somewhat" challenging shower door. I love my new shower! He was attentive to detail and helpful with his recommendations. I would hire him to do more work in the future.
Kratzke Holdings LLC
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Reviewed in June 2021
Josh, Kenny, Johnny and Nick were excellent to work with the drain tile installed in my basement, very courteous and did an excellent job of cleaning up too. Thanks for the top notch work!
Groundworks
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Reviewed in September 2020
We had a bidet installed. The project was somewhat complicated. The techs did an excellent job. Cost was reasonable. We have used this company several times. Highly recommend.
Current Flow Plumbing, Inc.
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Reviewed in July 2018
Kurt coordinated the Generac distributor, the electrician, installation of the concrete pad and hooked the generator up to our LP gas tank. Everything went smoothly and as planned. The site was cleaned up perfectly after the work was completed. Kurt is our first and only call for any plumbing...
Koegel Plumbing & Heating Solutions, LLC
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Reviewed in January 2018
Guy, the Installer, was punctual and professional. System works well. Great improvement in comfort after the humidifier was added. Mandy was helpful in getting me connected to Dustin. Appointments available within a couple of days.
Greeley Plumbing, Heating & Air Conditioning
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Reviewed in August 2017
We had a very good experience with this company. The young lady helping us to select what we wanted and needed was very informative and experienced with the various floor material. The replacement took two and a half days and they removed all the scrap materials. The man who installed the...
Alex Carpet One Floor & Home
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Reviewed in May 2017
Terrible, Installer came to put a new furnace in our home this winter to replace a system that was barely over one year old that had failed. We have a multistage system (gas furnace, heat pump, and plenum). Part of the system worked but he couldn’t figure out how to hook the rest up apparently...
High Road Heating & Cooling Co
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Reviewed in January 2017
I have had Your Home Improvement Company do several projects for me at my home. I appreciate the quality of the products used and the ease of working with them. Every project has been completed very professionally and I have found the follow up from sales, service and installation to be very...
Your Home Improvement Company LLC
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Doorbell Installation questions, answered by experts

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

Insulating a detached garage won't reduce your home's heating or cooling bills—and insulating an attached garage will only have a small effect on your home's energy efficiency. However, insulating an attached garage can reduce the transfer of heating and cooling to and from the outdoors, which can reduce the amount of energy your home needs to stay comfortable. Also, having an insulated garage is just more pleasant. Balance the cost of insulating your garage with how you'll use the space to determine if the project is worth it.

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.

Insulating your basement walls offers numerous advantages that make the project well worth it. By adding insulation, you can reduce the chances of moisture damage to the house's structure and lower the odds of mold growth. You'll also add comfort to the space by reducing temperature swings and increasing your home's energy efficiency, potentially reducing your energy bills to earn your investment back.

Open-cell foam insulation has a life span ranging between 15 to 25 years when well cared for. However, the material may degrade sooner in areas with high humidity or after prolonged water exposure. Proper installation and maintenance can maximize its longevity but requires close monitoring. Closed-cell foam insulation has a longer life span of 30 to 50 years.

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