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>

Does insulating windows with plastic work?

• <div><p>Insulating windows with plastic works, but it can be time-consuming, and the end results can—and often do—end up lacking in aesthetics. Window film and <a href="https://www.angi.com/articles/how-to-caulk-windows.htm">caulking your windows</a> to make sure there are no drafts are two options that increase the energy efficiency of your home in a low-cost way. Plastic can be a good strategy while you consider alternatives.</p></div>

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*The Angi rating for Doorbell Installation companies in Altaville, CA 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 October 30, 2025

Reviewed in October 2025
***** Absolutely top notch handyman :: 10/10 John has saved the day at our house many times. He’s repaired our fence, organized our garage, installed pull-out drawers, built a work bench, placed a gorgeous block of cement under our whole house generator and built a gate for it as well. My...
Larsen Home Maintenance
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Reviewed in October 2025
James did an amazing job installing a 200amp panel at my property. Communicated excellent, gave me a very favorable quote and professionally knocked the job out in no time. He was meticulous with his work and clearly took a lot of pride in providing a perfect finished product. 10/10 would...
Level Up Electrical
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Reviewed in March 2025
This company has been the best landscaping company to work with in my area. They came in to install plants, lawn, slate paths, drainage, and did a total overhaul of my old broken-down irrigation system. Steve?s expertise and craftsmanship has made our outdoor space come alive again. The only...
Mountain Side Landscaping
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Reviewed in January 2025
I used Chuck and Brighton EV to do a panel swap and install an Electric Charger and some other odds and ends like adding can lights. I couldn’t be happier with the experience. Chuck was on time, communicative, professional, and fairly priced. I highly recommend him and his company and he will do...
Brighton EV, LLC
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Reviewed in June 2024
Josh and his company did far more than a yard install. They did front and backyards. Concrete driveways , curbs and lighting. The quality of work is exemplary and we have received numerous compliments of the work. I would highly recommend Josh and his team.
J T URBANO CONSTRUCTION
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Reviewed in July 2023
Provided bid, was able to locate our garage door and installed without delays, This was an all around great experience and we will recommend Eric to our neighbors.
Door Nation Garage Doors and Gates LLC
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Reviewed in March 2023
Poor communication between project manager and installers
Arizona Turf Professionals, LLC
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Reviewed in March 2023
We received several bids since occupying our new home. Some offered very efficient systems, but their costs were prohibitive. Others designed a system with just enough capacity to qualify for lower SRP rates. When contacted by Grand Energy, I told them not to waste my time with promises they...
Virtual Horizons
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Reviewed in February 2023
Edison with AAA was very respectful, nice, patient and courteous. He went above and beyond installing this security gate. Iâ m very happy with his work ethic and ability to get the job done thoroughly.
AAA Handyman Service
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Reviewed in January 2022
The survey, measurement, quote, approval, and install were all super easy, fast, and painless.
Ergeon
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Doorbell Installation questions, answered by experts

Each of the three types of wool insulation has particular disadvantages. While their R-value is higher, they all cost more than fiberglass versions. Installing mineral wool and sheep wool requires protective gear. Because of its vulnerability to insects, chemicals are used in its production. Hemp wool is more costly to install than other types because additional tools and labor are involved.

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.

Ductwork should be wrapped in insulation in certain locations. This includes unconditioned interior parts of the home, such as attics, crawl spaces, basement ceilings, and between floors. Duct joints should also be insulated since they're more likely to leak air than other parts of your system. Building codes in some areas also require ductwork to be insulated.

Yes, including recycled denim and cellulose from natural fibers.

Insulating windows with plastic works, but it can be time-consuming, and the end results can—and often do—end up lacking in aesthetics. Window film and caulking your windows to make sure there are no drafts are two options that increase the energy efficiency of your home in a low-cost way. Plastic can be a good strategy while you consider alternatives.

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