Should you remove old insulation before adding new insulation?

• <div>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.</div>

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Verified Reviews for Doorbell Installation pros in Dexter, MO

*The Angi rating for Doorbell Installation companies in Dexter, MO 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 Dexter, MO 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 November 22, 2025

Reviewed in November 2025
Amazing customer service. Prompt and friendly. Efficiently completed work and apprised me of all changes that needed done
The Honey Do Crew
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Reviewed in January 2024
They have completed several projects of drainage tile installation, road repair and septic tank installation. All projects were completed on schedule and an excellent manner.
HeartLand Dirt Works, Inc.
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Reviewed in November 2020
Installation went smoothly. Workers were very professional and efficient.
Jim Bollinger & Son LLC
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Reviewed in January 2020
Hired this outfit in 2018. 14K worth of work.Started out ok but as soon as we left the state for 6 months they figured since we weren't there to keep an eye on everything they would do it as quick and crappy as possible. Where to start? When they put the kitchen cabinets in they put a screw from...
Nygard Construction Llc
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Reviewed in October 2019
I would have liked to see an itemized list of charges before final charge, it would be good to see final appearance of all the items chosen together as in a computer picture. I had only one choice of contractors but wanted the job done asap so I proceeded with Bath Fitter. Mike the installer...
Bath Fitter
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Reviewed in May 2019
K B Contracting found defects in my roof the prior roofing company had missed. His skill set and eye for detail was exemplary. Brandon went out of his way and took his time to make sure the roof was installed correctly. He did not charge me extra for it.
K B Contracting
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Reviewed in October 2015
kyle did a wonderful job installing the metal roof on my house was very courteous and did the job in a timely manner
Semo Fence and Home Improvement
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Reviewed in September 2013
A. Identified problem and ELECTRONIC parts needed for repair. B. Called, got part prices, relayed information. C. Will get and install parts at my authorization. (Also saw the same precipitating...
BEAUFORD'S APPLIANCE SVC
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Reviewed in November 2012
Our furnace broke down the day before my husband was to have major surgery. We were going to be in hospital for about 5 days. I called Aire Solutions and they came out that afternoon to check it out. We were able to make arrangements to purchase a New furnace that day. We were given detailed...
Aire Solutions
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Reviewed in December 2009
Everett came on time, installed an upgraded humidifier at a much lower price than others I talked too. Price and work was as quoted. Looking over his work, he did a good job and used top of the line parts.
Jones Air And Water
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Doorbell Installation questions, answered by experts

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.

Through R-value assessments based on climate and existing insulation.

Insulating your home's exterior walls can realize up to a 20% reduction in your monthly energy bills. This means that regardless of how much the project costs, it can begin to pay you back immediately. Additionally, adding spray foam and other high-end materials can increase the selling value of the property.

The primary reason that insulation saves you money over time is that it reduces your energy bills by making your home more energy efficient. A crucial part of an insulation system is a properly installed vapor barrier. Local building codes dictate whether your insulation requires a vapor barrier based on the type installed. While some high-quality wool insulation may not technically need a vapor barrier, most municipalities still require one to meet code.

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.

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