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>

Get matched with top insulation pros in your area

Q: Do interior walls need insulation?

• <div><p>Interior walls don't require insulation. However, there are a couple of reasons you may consider adding it in some situations. Insulation in interior walls is excellent for sound-dampening between rooms and can help maintain a regulated temperature in insulated rooms by lowering the heat transfer between adjacent areas of the home. </p><p></p></div>

Q: Do tankless water heaters need to be insulated?

• <div><p>Insulation provides additional protection for your tankless water heater. Even if the unit is installed inside the house, it&rsquo;s still a good idea to wrap the unit up with insulation batts, especially if you live in cold climates. For outdoor units, you can build an insulated box around the tankless water heater for freeze protection.</p></div>

Q: Can I install injection insulation myself?

• <div><p>DIY installation is not recommended, as professionals ensure even distribution, proper sealing, and compliance with building codes.</p></div>

Q: Will adding insulation stop ice dams?

• <div><p>Yes, proper insulation in your attic or ceiling can help prevent ice dams. When attic spaces are too warm, they cause the snow on the roof over those areas to melt more quickly than the rest of the roof and then travel downward to a colder section of the roof where they refreeze. If less heat is allowed to escape from underneath the roof, snow will melt at a more consistent rate, making ice dams less likely.</p></div>

Enter your zip and get matched with up to 5 pros

Need a pro for your insulation service project in Mt-juliet, tn?

Select your specific project to find the pro for you.

Verified Reviews for Insulation Service pros in ,

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

*The HomeAdvisor rating for Insulation Service companies in , is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on January 17, 2026

Reviewed in June 2024
The three Techs did a great job of removing all the old bat insulation. Cleaned the attic, then sprayed the Intier attic space with mold neutralizer, before installing the new insulation. Arrived at 8:45, completed the installation cleaned the Intier area, and left by 2:30. Great group of Guys....
Insulation Co., LLC - Removal & Clean Outs
Request a quote
Reviewed in April 2023
Window Depot did an amazing job on my deck. I wasnt sure what I wanted to do, but their composite decking was affordable and will last a long time. I am excited to have family over, and I am no longer embarrassed by my backyard. Jeff and the ground crew were polite, respectful, and caring for...
Window Depot USA of Central Ohio
Request a quote
Reviewed in February 2023
They were so pleasant and efficient; it also turned out that due to the structure of our home they couldn’t insulate as much as we wanted, but they cut the cost accordingly so that we didn’t have to pay the original quote amount.
RetroFoam of Central Ohio
Request a quote
Reviewed in February 2022
My husband and I hired Home Insulation Experts, Inc to work on the recently flipped home we just purchased. The crew removed all the old insulation, disinfected the entire attic and installed new blown insulation.
Home Insulation Experts, Inc.
Request a quote
Reviewed in March 2021
Scott & Doug were amazing to work with. We needed a full basement remodel following water proofing. They exceeded our expectations and have provided us with a beautiful, warm and cozy new living space in our home. Full scope of project entailed framing, insulation and drywall, electrical outlets...
HOME REMEDIES
Request a quote
Reviewed in December 2020
From the first call I received explaining my options to the workers who put the insulation in, I think they did a great job. I would highly recommend them.
SC Insulation
Request a quote
Reviewed in July 2020
The experience was terrific. Zach is very personable and professional. He explained what needed to be done which other companies hadn't done. He told us things we could do to reduce the cost or we could fix ourselves. His estimate was far below others. I'd hire him again and recommend him highly.
Mold Mentor
Request a quote
Reviewed in July 2020
I requested competitive bids form multiple contractors. After research, I felt confident in the consultation I received from Paul at Polar Bear. I purchased an A/C system from him, and I would use him again in the future, and I recommend this company to others. I feel Paul is a straight...
Polar Bear Air
Request a quote
Reviewed in April 2020
The project went smoothly. They arrived on time and worked all day. Completed the project the following day. Crawl space walls are now insulated, and 20 mil barrier installed throughout.
Ohio Basement Authority
Request a quote
Reviewed in October 2018
The team showed up on time, and insulated/air-sealed throughout the day. I was busy that day, and was not able to fully inspect until after the work had been completed. Afterwards, I noticed several things: 1) Two can lights that were not insulation-contact rated had had foam insulation applied...
Energy Tech Insulation
Request a quote

Find Insulation pros in Mt-juliet

No results for Insulation pro in

Try adjusting your search criteria.

Insulation questions, answered by experts

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.

Interior walls don't require insulation. However, there are a couple of reasons you may consider adding it in some situations. Insulation in interior walls is excellent for sound-dampening between rooms and can help maintain a regulated temperature in insulated rooms by lowering the heat transfer between adjacent areas of the home.

Insulation provides additional protection for your tankless water heater. Even if the unit is installed inside the house, it’s still a good idea to wrap the unit up with insulation batts, especially if you live in cold climates. For outdoor units, you can build an insulated box around the tankless water heater for freeze protection.

DIY installation is not recommended, as professionals ensure even distribution, proper sealing, and compliance with building codes.

Yes, proper insulation in your attic or ceiling can help prevent ice dams. When attic spaces are too warm, they cause the snow on the roof over those areas to melt more quickly than the rest of the roof and then travel downward to a colder section of the roof where they refreeze. If less heat is allowed to escape from underneath the roof, snow will melt at a more consistent rate, making ice dams less likely.

The Mt-juliet, tn homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Melissa Graham
•
Dec 10, 2025Dec 10, 2025
How Much Does It Cost to Insulate a Basement? [2026 Data]
The cost to insulate a basement varies based on materials, size, and other factors, as well as how much of the work you wish to perform yourself.
Haley Nothstein
•
Dec 16, 2025Dec 16, 2025
How Much Does Spray Foam Insulation Cost? [2026 Data]
Trying to calculate how much spray foam insulation costs? Our in-depth guide breaks down pricing by type, amount, and where you install it.
Haley Nothstein
•
Dec 28, 2025Dec 28, 2025
How Much Does a Radiant Barrier Cost to Install? [2026 Data]
How much does a radiant barrier cost? Our guide breaks down prices by type of barrier and size of your attic space.
Kyle Schurman
•
Nov 5, 2024Nov 5, 2024
Fiberglass Insulation vs. Foam Board: Pros, Cons, and Cost
When comparing fiberglass insulation versus foam board, each has certain areas where it works better. Learn more about these home insulation options.
Jouviane Alexandre
•
Oct 3, 2025Oct 3, 2025
Should You Insulate Interior Walls? 4 Reasons to Consider
Insulation does more than keep your house warm in the winter and cool in the summer. Consider these factors when deciding to insulate your interior walls.
Taylor Sansano
•
Oct 2, 2025Oct 2, 2025
How to Install Insulation the Right (& Safe) Way
Learning how to install insulation requires technique, patience, and safety training. Read our guide to see if it’s a DIY project you should take on yourself.