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>

What is the downside of radiant barriers?

• <div><p>The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important. </p><p>Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency. </p></div>

Can you install fiberglass insulation yourself?

• <div><p>If you’re a savvy DIYer around the house, own the basic tools, and have enough time on your hands, you can definitely install fiberglass insulation yourself. Doing the work yourself will certainly keep overall <a href="https://www.angi.com/articles/how-much-does-insulation-cost.htm">insulation costs</a> down. However, if you’re not confident in your handy skills around the house, call in a professional.</p></div>

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Last update on March 11, 2026

Reviewed in March 2026
Hired Wes for several projects, large and small. Completed extensive land clearing on my property with an excavator. Also re-painted living room and Installed wood panelling. Did a great job. Responsive, worked quickly and left site clean.
HomeCore Property Services
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Reviewed in October 2025
Needed a panel upgrade to accommodate new equipment being installed in my shop. James from Level Up got the job done fast. Installation was clean. Very professional and easy to work with. 10/10 would recommend.
Level Up Electrical
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Reviewed in September 2024
Highest Recommendation! We just had them install a new 4 ton HVAC and retro fit vinyl windows/slider door. Great service from Rep Scott Herold (contact him directly 916-956-2788) to measuring people to installers. Thank you Scott Herold, Skip Hunter, Mike, Bill, Clint, Chris, Jeff and all those...
Northwest Exteriors
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Reviewed in March 2024
Daniel was prompt to answer my request for help with a small install and repair of wood flooring. He came out the following day to look at the project. Seemed very knowledgeable and gave a very fair bid. He was able to do the project the following day! Arrived on time. Showed care and respect...
Daniel's Floor Refinishing
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Reviewed in December 2023
Mike did a great job with our project to lay a pad for a shed install. He takes a great deal of pride in his work and it shows in the finished product. He communicated throughout the sales and install process and made good on all commitments.
Concrete Innovations, Inc.
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Reviewed in April 2023
The installers Matt W. and Thomas S. were courteous and very professional. They removed the old bathtub and installed a new shower in about six hours. Their work was outstanding.
West Shore Home Lexington
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Reviewed in December 2022
Michael was great! The work was actually for a shed installation so we could put our washer dryer outside our house and he did the plumbing, sewer, and electrical and carpentry all himself. It is hard to find someone that can do everything like this and to do it well. He is also very friendly...
Integrity Plumbing & Water Purification INC
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Reviewed in December 2021
Joe repaired our deck and installed a railing. He does outstanding work. He returns calls and is very prompt. He follows through. I would highly recommend him for any handyman jobs. Will be using him again to repair another deck. Joe is awesome!
Fences, Decks, & Handyman Services - Unlicensed Contractor
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Reviewed in October 2021
Chuck installed three security doors, painted an interior room and fixed several other items. He works fast, does clean work, always shows up on time, and makes sure everything is complete. And he is so knowledgeable in his trade and very hard working! I am so happy that have already booked...
805 Custom Projects
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Reviewed in September 2021
This was an included maintenance / inspection of HVAC system installed in October of 2020. We are so pleased with the installation and follow up that I would recommend Gilmore to anyone. They are absolutely the best. We couldnâ t be happier. Gilmore should be proud to have a business with...
Gilmore Heat Air Solar Contractors
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Doorbell Installation questions, answered by experts

While fiberglass is dangerous to work with, it’s a perfectly safe material once it’s installed. If you’re tackling the installation yourself, make sure you take the proper safety precautions and wear the right gear to avoid skin and eye irritation and lung complications. Working with a professional insulation company can mitigate these risks.

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.

The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important.

Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency.

If you’re a savvy DIYer around the house, own the basic tools, and have enough time on your hands, you can definitely install fiberglass insulation yourself. Doing the work yourself will certainly keep overall insulation costs down. However, if you’re not confident in your handy skills around the house, call in a professional.

Installing insulation helps reduce energy usage, improve home comfort, and lower utility bills by maintaining stable indoor temperatures year-round.

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