Should you remove old insulation before adding new insulation?

• <div><p>You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.</p><p>However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.</p></div>

Can I use fiberglass insulation to soundproof a room?

• <div><p>We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. <a href="https://www.angi.com/articles/diy-dangers-fiberglass-insulation-hazards.htm">Fiberglass insulation is dangerous</a>, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.</p></div>

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*The Angi rating for Doorbell Installation companies in Dexter, OR 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 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 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 September 2022
I called them and they came right out and got my phone line installed in a very timely manner!! I was impressed how fast they came out and got things up and running.
TTC Communications, Inc.
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Reviewed in June 2022
Very accommodating with purchase options. Helped make it affordable. Quality install. Quality product.
DaBella - Eugene (Roofing)
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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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Doorbell Installation questions, answered by experts

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

Professionals can install a radiant barrier in a day or two, but DIY installation will take several days. The time it takes to install a radiant barrier depends largely on the size of the space and the installation method. Larger homes can take a pro two to three days to finish the job. It’s also quicker to lay foil over existing insulation.

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

A radiant barrier is a form of insulation topped with a reflective material designed to keep homes cool during hotter months. It is generally considered worth the investment if you live in a hot, sunny climate, as the cost can be recouped over time through lower energy bills. Installation costs typically range from $0.10 to $1 per square foot. After installation, homeowners in warm climates may save between $7 and $15 per month, potentially reducing their electric bill by 5% to 10%. The exact savings will vary depending on your location and the type of barrier chosen.

We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. Fiberglass insulation is dangerous, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.

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