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>

Is bubble wrap or dish foam better?

• <div><p>Bubble wrap is better for moving since it can be cut to size, whereas dish foam comes in precut sheets that are harder to manipulate. However, if you’re packing items like dishes, wine glasses, picture frames, or mirrors, dish foam will protect them better. Ensure you measure your box beforehand so you know what size dish foam to purchase. </p></div>

Should I remove old attic insulation before adding new?

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

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Last update on February 19, 2026

Reviewed in February 2026
Excellent service and very prompt
Henderson Roofing
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Reviewed in June 2025
Im very satisfied with the service i recieved from California Home Center. I had both my bathroom and kitchen remodeled in my vacation home in Temecula. The customer service was excellent. They kept me in the loop the entire time. They cleaned up well after too. I would definitely recommend...
California Home Center, Inc.
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Reviewed in December 2022
Steven did everything in the contract and was great with communication through out the process.
Dream Home Management Services, LLC
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Reviewed in October 2022
We contacted Mr. Arnold concerning some stumps (30 plus) that we needed removed from our property. We made contact on Tuesday and the work was completed on the Thursday of that week. Mr. Arnold was professional, prompt and did more than we had agreed toâ ¦all for an affordable price. We have...
Arnolds Land Management
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Reviewed in August 2022
Very professional, on point with communication. Truthful and honest at all times. Top notch business practices. We will be using Jones Construction for all of our home needs.
Jones Construction
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Reviewed in June 2022
The entire job went great from start to finish! Wesley was professional and courteous, he made the repair to my horse trailer on site, and I paid exactly what we agreed on. I would definitely recommend his services.
Weldology
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Reviewed in August 2021
Got a call the same day and arranged for a meeting. Punctual, kept me informed and did great work.
Service Pro We Get It Done, LLC
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Reviewed in February 2021
Chris was timely in his response, he was easy to get along with, he did everything he said he would do throughout the process, and when he came to install the door he worked hard and did an excellent job. I highly recommend Chris!
Saltgrass Garage Doors
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Reviewed in September 2013
After requesting a service call to repair my garbage disposal, I waited almost 2 weeks before CHW finally told me just to find my own repair person. I called them almost every day during that time frame and was told repeatedly "they were working on it" and would have an answer for me by the end...
Choice Home Warranty
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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.

Bubble wrap is better for moving since it can be cut to size, whereas dish foam comes in precut sheets that are harder to manipulate. However, if you’re packing items like dishes, wine glasses, picture frames, or mirrors, dish foam will protect them better. Ensure you measure your box beforehand so you know what size dish foam to purchase.

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.

Yes, winterizing your mobile home is helpful for your safety and savings. Keeping your mobile home safe, secure, and warm during the winter will protect it against damage from harsh weather, which can lead to expensive repairs. Not only that, but winterization also helps to lower your energy bills by keeping warm air in and cold air out.

Costs depend on area size, material thickness, and site preparation needs.

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