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 Onamia, MN

*The Angi rating for Doorbell Installation companies in Onamia, 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 Onamia, 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 March 11, 2025

Reviewed in March 2025
These guys are absolutely awesome! We had a cracked heat exchanger and it was dangerous to continue heating because of carbon monoxide leaking. The original duct work was all done incorrectly and caused the furnace (and A/C} to overwork. We had their representative, Danny come to our house one...
Total Comfort Heating and Cooling
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Reviewed in January 2024
No mess was left behind after completing the install. Process was quite seamless. I would hire Richard again for future projects.
Brown's LLC
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Reviewed in May 2020
David Kottke came to do our annual inspection for the waterproofing job on our basement. It was the first inspection since we bought the property and he explained everything that had been done and answered all of our questions. We inquired about a battery back up on our sump pump and he was able...
Groundworks
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Reviewed in May 2020
We bought this property last year and this was our first inspection-David Kottke did a great job explaining to us everything we have going on. We inquired about a battery back up on our sump pump and he was able to install it on the spot! Great work!
Groundworks
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Reviewed in November 2019
The owner is very professional, sells a top quality product, and does a professional job of installation. I am also confident he will stand behind his product and work.
Rny Day Service, Inc.
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Reviewed in October 2019
Great service and very good group of installers. They did a great job and did it quickly. Very fair on Price. Joe was a pleasure to work with. I highly recommend these guys. Thanks again guys. Jeff Nelson, Isle, Minnesota
Ferrara's Heating, Air Conditioning and Refrigeration, Inc.
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Reviewed in December 2018
Steve designed a new Combi-Boiler System to replace an old water heater set-up used for DHW and in-floor heat. This is a much more efficient system and the installation was very professional and aesthetically pleasing to boot. He also came up with a relay setup so the thermostat in place would...
Anderson Aire
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Reviewed in May 2017
Extremely expensive, excellent quality but do not question there work and make sure you pay close attention to what you agree to have done and what actually is done. When you receive your call to set up an appointment for your estimate you will be told any estimate is good for 18 months but when...
Your Home Improvement Company
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Top-Rated Doorbell installation pros in Onamia - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.

If you feel your energy bills are too high or your HVAC system is working harder than necessary to maintain the correct temperature in your home, you may have an under-insulated home. If you’re unsure, consider having your system’s efficiency assessed by a local independent energy auditor.

Insulating an unheated garage can still be worth it. For instance, insulating an attached garage can help with heat loss from your house in general, and it can also make it easier to store electronics in your garage without worrying about them being exposed to extreme temperatures.

If you use your detached garage as a workspace, insulation can still make a difference. Plus, you can use space heaters and a window unit AC to help condition the space while you work without installing heating.

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.

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