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Dec 31, 2019
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Four Scenarios When Your Insulation Needs to Be Replaced

In many situations, it’s possible for quality contractors to replace insulation or make enhancements to your current attic insulation and ventilation to make it more effective.  However, in certain scenarios the best course of action is to remove the old insulation and start over.  Here are a few concerns that should make you consider an insulation replacement at your home.

Damaged Insulation From Animal Infestation

Once pests such as mice, raccoons, squirrels, and bats enter a home, they’re able to tunnel through cellulose and fiberglass insulation which can cause attic problems for homeowners.  This prevents attic insulation from working as it should. It isn’t long before the animals begin using your attic as a bathroom.  The pheromones their droppings contain can even attract more company from pests.  In addition to the overall gross factor of animal feces in your attic, they also pose a serious risk to your home’s indoor air quality, which warrants making insulation replacement a priority.  This is because pathogens can be inhaled without ever having to come in direct contact with them as air flows from the attic and throughout the home.

bat droppings in attic
This attic inspection turned up a sizable amount of bat droppings.

Consider An Insulation Replacement If You Have Vermiculite

Mined from the earth, vermiculite is comprised of lustrous flakes. When brought to a high temperature, the flakes expand. In its unadulterated form, vermiculite insulation is nontoxic. However, a mine in Libby, Montana was the source of most of the vermiculite sold in the country from 1919 to 1990. Incidentally, the mine also contained a deposit of asbestos, contaminating the vermiculite used for home insulation. While not all vermiculite insulation contains asbestos, attics with vermiculite insulation should be tested for the presence of asbestos. Asbestos fibers that are disturbed can become airborne and increase the risk for lung cancer and mesothelioma. Removing and replacing insulation contaminated with asbestos should only be completed by a licensed and reputable ventilation and insulation contractor with extensive experience in this area.

Replace Attic Insulation That’s Moldy

Attic mold flourishes in warm, humid, damp environments.  Leaky roofs, bath fans venting into the attic, and an insulation installation completed by amateurs can all lead to mold growth on attic insulation.  Once mold on insulation is present, it quickly spreads.  Moldy insulation proves problematic because it causes an array of health issues such as watery eyes, persistent fatigue, and continuous headaches.  If you’re wondering if your old insulation or mold could be attributing to your sickness or allergies, it could likely be a mix of the two.  After a trustworthy contractor has pinpointed the source of water and moisture with a proper solution, replacing insulation should be addressed.  After that, new insulation should be installed.

attic mold

Watch Our Ventilation & Insulation Contractors Complete A Project:

Prioritize Replacing Insulation Damaged By Fire

When a home catches on fire, the smoke rises to the attic.  Even if the home is not a total loss, the attic insulation will take on a strong, smoky smell.  In addition, the properties of the damaged insulation have been compromised, rendering it useless.  After a fire, it’s best to remove and replace the insulation as quickly as possible. Moderately burned insulation can conceal a covert spark which can re-ignite after smoldering.

Browse Our Home Insulation Installation Projects:

See Browse Our Insulation and Ventilation & Insulation Replacement Reviews:

"Tyler with Lindus did an amazing job of looking over my home and identifying some critical areas of need regarding insulation. I’ve spent my whole career in the trades and always enjoy learning new things and I definitely learned from Tyler. If you’re looking for honest and insightful help with insulation issues with your home, I would highly recommend Tyler at Lindus."

Andrew L.
St. Paul, MN
January 8, 2025

"Tyler was professional in his assessment of our house condition and did a great job explaining my options all without overselling. It turned out for my situation I did not need to book a big project.  Thank you all for being real about what is needed rather than trying to sell me something that I did not need."

Mike H.
Savage, MN
January 2, 2025

"Brian came out to check the attic insulation in our home that we recently purchased. His opinion was we were up to par and code, but we could always use more. The consensus was we would go through our first winter and see how the heat bills were. Thanks to Brian and Lindus for your free analysis of our home."

Keith J.
Hudson, WI
November 14, 2024

"My house is 30 years old, and I've never had my attic insulation evaluated. I felt I was overdue to get an inspection and I contacted Lindus Construction via their website. I received a call in a matter of minutes to schedule an inspection. A few days later, Kevin came out and conducted a thorough inspection. The good news was that I had adequate insulation and there was no need to add any more. The bad news was that he identified some mouse activity that I will need to address. Highly recommended contractor!"

Dave R.
Maple Grove, MN
October 12, 2024

"Lindus Construction has lived up to its promises and more. We had the Insulation in our roof replaced. They showed up on time, completed their work in two days, cleaned up so that you would never believe they had been there. Randall, the Supervisor came often to check on the progress and helped as well.  We would highly recommend this company to anyone considering some type of home remodeling. Grading AAA+."

Gary G.
North Branch, MN
June 12, 2024

"We did a major re-insulation which included vacuuming out old insulation, spraying a layer of foam, and blowing in additional insulation. A different crew performed each operation. All did an excellent job. We'd use Lindus again for insulation work, though we hope never to need it again."

Bob J.
White Bear Lake, MN
May 25, 2024
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