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 are the best ways to insulate an attic?

• <div><p>Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into <a href="https://www.angi.com/articles/diy-spray-foam-insulation-kits.htm">spray foam insulation</a> or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.</p></div>

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Last update on January 20, 2026

Reviewed in January 2026
The tile work was very well done, and finished timely. We have used them several times for other work as well: small bath remodel; installation of wall mount air conditioner; and other minor things. Always pleasant, very professional, and hard workers. Recommend
Traveling Transformation
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Reviewed in November 2025
We had a fence with two gates installed on the perimeter of our 10+ acre property, H&P did a fantastic job. They were extremely professional and had great attention to detail. They were very easy to work with, highly responsive, flexible and accommodating to our ever changing schedule and...
H & P Fencing LLC
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Reviewed in October 2025
Hi-Tide Tech service was OUTSTANDING! First, they were 5 minutes early for the appointment! Being from the “old school” I believe in punctuality. They knew exactly what they were doing and wasted no time doing the work I’d hired them to do! (Install a wall mounted 75” TV). They completed...
HI-TIDE TECH INC.
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Reviewed in January 2025
Hefe fence did a great job on our aluminum and vinyl fence at our condo in Englewood Florida. The crew were courteous, professional and worked quickly ton install what we needed. Their pricing was very competitive and the work was exactly what we wanted. Ken Jxxxxxx
Hefe Fence LLC
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Reviewed in May 2024
Service call was prompt. After negotiations for new unit they arrived 4 hours later and it was completely installed today. Workers were fast efficient and worked together effortlessly to get the job completed in a timely manner. Went above and beyond to make sure we were happy with installation...
Purtz Air Service, Inc.
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Reviewed in October 2023
Windows and Door Storm Protection Professionals, LLC replaced all the windows and doors on our home. Everyone we dealt with were true pro's. From Rich Derrig their sales rep, the crew who installed the windows, and the customer support people were a pleasure to deal with throughout the...
Window and Door Storm Protection Professionals, LLC
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Reviewed in May 2023
The crew was very timely and professional. I live on lake and they install Rip Rap. Looks good and will stop future erosion. All workers were extremely polite and hard workers. I highly recommend them as they did a great job at a affordable price. Jerry Shoemaker. 5/31/2023
Greentopps Landscape, Maintenance & Tree Services, LLC
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Reviewed in December 2022
Had 3M sunscreen applied to all windows in my travel trailer. It was an awkward job because the window screens are hard hard to remove, and the windows have curved corners. Plus, the installer had to crawl over two sofas, a bed, and a kitchen sink to make the installations. He did a terrific...
Total Shield Protection
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Reviewed in June 2022
Fast, reliable and transparent. I recently hired Jantz Electric for work on a house. There were a few appliances that needed upgraded electrical cords, we needed GFCI outlets installed, and additional outlets that needed fixing and repair. The work was very professional, quick and all done in a...
Jantz Electric LLC
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Reviewed in March 2021
Doug is wonderful to work with . He is very dependable,. I am very pleased with the fence he installed for me. The fence is very good quality . His staff did an excellent job . I would highly recommend MasterCraft Home services
Master Craft Home Services of Florida, Inc.
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Doorbell Installation 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.

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

Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into spray foam insulation or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.

Yes, usually you will need some kind of vapor barrier on the exterior walls when the framing is attached to concrete and masonry surfaces.

Insulating windows without plastic is usually the better method. Outside of simply replacing your windows, you could buy cellular shades, which trap air between the window and the home, add a window film that blocks UV rays and traps heat, or cover your windows with a low-emissivity coating called “low-E.”

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