Should I remove old attic insulation before adding new?

• <div>Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: <ul><li>If the insulation is over 15 years old</li><li>If the insulation is wet or moldy</li><li>If it is <a href="https://www.angi.com/articles/what-is-vermiculite-insulation.htm">vermiculite insulation</a></li><li>If you see signs of pest infestation</li></ul>Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.</div>

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

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

Last update on November 21, 2025

Reviewed in November 2025
Tim from Spring Well Plumbing installed two faucets in the kitchen and bathroom and had to replace two shutoff valves which no longer worked. He did a great job in less than 2 hours. The price was very reasonable and I would hire him again in a minute.
Spring Well Plumbing, Inc.
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Reviewed in May 2025
Pierce Creek Electric was great to work with on our project, from the quote to the final install their communication was excellent . Jacob was professional in all aspects of the project and did a great job of coordinating with the other contractors working on the project. I would highly...
PIERCE CREEK ELECTRIC LLC
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Reviewed in February 2025
The communication with both Taylor and Jeremy was great leading up to the install. They installed my wall oven quickly and professionally. Great guys. I would definitely hire them again for another project.
RRR HOME SERVICES LLC
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Reviewed in June 2024
I have had Bill Christianson install many wood floors and carpeting in several properties over the years. He has Always done a wonderful job at a reasonable price. Upgrading the property. I would recommend him highly. He is a professional in his field.
Christiansen Floor Coverings
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Reviewed in November 2023
Sandy, the owner of Suite Home Customs, is very knowledgeable and detail oriented. She installed a stone fireplace mantle surround for us. I could have probably did the install, but there is no way I could have duplicated her expertise and craftsmanship. Would not hesitate to hire her for future...
Suite Home Customs LLC
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Reviewed in September 2023
They installed a perfect system for my business. Quickly and perfectly
Miles Security Solutions
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Reviewed in April 2023
They were on time, clean and respectful. The install was done well and looks great. We had one minor issue with a bad fitting and they were very responsive. It was fixed immediately
Harvest Valley Specialties
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Reviewed in April 2023
We were very pleased! Mike got us early installation and he and his crew were on time and good guys! Would use him again and again. Thanks to Mike and his crew.
Michael Hill Construction, LLC
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Reviewed in May 2022
Excellent pro install and love the quality flooring! Recommend highly
CVK Construction, LLC
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Reviewed in March 2022
I had them come install a new roof they where quick and efficient. The workers where knowledgeable and friendly and made sure i understood every step of the process, since then i have had them come and do several other projects including new floors and a closet remodel as well as a new patio and...
I.C. Touch, LLC
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Doorbell Installation questions, answered by experts

They recommend sustainable materials and water-saving fixtures, tailoring choices to balance sustainability and style.

Reflective and high R-value batt or roll insulation are often considered energy-efficient, offering significant thermal resistance benefits.

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.

Experts use advanced techniques and tools to assess existing insulation levels and identify gaps. They implement strategic placement of new insulation to ensure complete coverage, optimizing thermal resistance and energy efficiency.

Installing sheets of plywood over attic insulation is a popular choice, especially in storage spaces. That said, insulation works by trapping hot air—so it needs extra space to expand and be effective, or you might reduce the energy efficiency of your home.

It’s important that you never compress the insulation by installing flooring directly on top of it. In many houses, you’ll need to install a subfloor before putting plywood over insulation in your attic.

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