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>

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*The Angi rating for Doorbell Installation companies in Dover, TN is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Doorbell Installation needs.

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Last update on June 24, 2026

Reviewed in June 2026
Would not hire this company. I was scheduled 2 times for gutter installation. He canceled on me the first day said his last job was taking longer than expected and he would be out tomorrow to install my gutters. He called the next day and said he was going to have to reschedule me again and...
Harts Seamless Gutters
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Reviewed in July 2024
Could not be happier with the service from the guys at Ideal Siding. Took the time to make sure the cladding was installed just right. Turned out just like I had imagined.
Ideal Siding Chattanooga
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Reviewed in January 2024
Helped with multiple projects and was tidy. Worked on installing new shower walls, siding, enclosing under deck, replacing outside faucet and installing 2 gates.
Noble handyman service
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Reviewed in July 2023
They have done so much work at my home. He installed an interior door in my guest bedroom. He also installed a door at the top of my stairs. He has installed a few ceiling fans, a vanity in my bathroom and he has touched up the paint in various areas of my home. They are very dependable, and...
J French Doors & More
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Reviewed in June 2023
Gumber flooring responded to my call quickly and was very knowledgeable in the type flooring i wanted they did a fantastic job installing my flooring will definitely get them to do the rest of my house
gumber flooring
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Reviewed in July 2020
A Country Gentleman , Skilled Workman , Trustworthy, Timely, Honest, Caring, Dependable, Friendly. Initial contact was for wind damage repair. Provided low cost solution and went the extra mile to answer my questions , gave good advice on the proper course of action. I selected the high option...
Robert Mooney
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Reviewed in June 2015
Morgan and Donald came to perform the annual service on the Waterguard system in our basement. Both were very pleasant and professional, taking the time to explain what they did and why. They also delivered and installed a SaniDry basement dehumidifier. I was apprehensive about spending big...
Frontier Foundation & Crawl Space Repair
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Reviewed in September 2013
Our bathrooms are back to back. The master bath was smaller than the guest bath and we needed just the opposite. We called Scott to come and give us ideas and estimates. From the very beginning Scott exhibited the professionalism and knowledge that we were seeking in a contractor. We...
Kentucky Lake Remodeling
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Reviewed in July 2013
They called first; came when expected. After installing the brand new Whirlpool dishwasher it wouldn't work and they suspected a sensor problem.. Lowes was contacted and they took it back and brought another brand new one out to install without complaining. They had another promised job which...
Smart Plumbing Repair And Drain Cleaning LLC
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Doorbell Installation questions, answered by experts

While not every wall requires a vapor barrier, if you do need one and don’t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.

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.

Yes, they address underlying issues, providing long-term seals and energy savings you might need help to achieve.

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.

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