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>

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 Rigby, ID 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 Rigby, ID 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 September 21, 2026

Reviewed in September 2026
These guys are the best. They did my install and do 6-month servicing as part of the deal. Very professional and thorough from initial bidding through install and service.
Elite Comfort Systems LLC
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Reviewed in August 2026
I have hired Jesse for multiple projects in my recently purchased hone. He has put together beds, tables , dressers and side tables. He also installed a gate on my front porch. He has trimmed my tress and modified the gate in my backyard and laid gravel so I can park my vehicles and camper in...
Jesse Services
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Reviewed in June 2026
We got four windows replaced in two bedrooms because our proximity to the highway our old windows allowed a ton of road noise. We were ready to spend for the top of the line the Bella windows and our sales rep suggested that we not spend for the three pain windows insisting that the two pain...
DaBella - Idaho Falls (Windows)
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Reviewed in February 2025
Installing blown in insulation is messy, but they did a great job keeping it to a minimum. Did not take long to complete the job.
Diaz Insulation, LLC
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Reviewed in November 2024
Not a very good install. They just ran the wires and did not install the ends. Did not put anything to isolate the wires from the metal they drilled through. Had to do that myself
Mr. Electric & Sons, LLC
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Reviewed in April 2024
Wonderful job installing ceiling fan and replacing a wall socket. I definitely will re-hire him again.
Horak Electric Inc
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Reviewed in January 2024
Ryan Seminario/Black Iron Construction installed a sliding door package in our living room. It was difficult to find someone willing to do a smaller project but Ryan was totally on board. This project required installing a header and re-constructing the wall to fit the doors, putting up...
Black iron construction
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Reviewed in July 2023
Install went great. He is committed to doing a quality job. I will definitely hire him again for the next project.
That1guy Restoration&Remodel LLC.
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Reviewed in March 2023
Dependable did a terrific job replacing my windows and doors. Robert gave me a good quote and said they are the best and that proved to be true. Jesus and his crew did a great job with the installation. They were prompt, tidy, and efficient. They did some extra things to make the whole...
Dependable Shutter & Glass
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Reviewed in January 2023
John Weber and Bill Sevey were excellent at installing the windows. They were friendly, professional and efficient. I enjoyed their good moods and great attitudes. I liked that they had only positive remarks about their business and felt they really enjoyed their jobs. Thank you!
Renewal by Andersen of Boise
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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.

The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years.

Through R-value assessments based on climate and existing insulation.

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.

When installing board and batten siding, make sure there is wall sheathing and a moisture-resistant barrier installed. Behind that sheathing should be plywood or OSB for you to nail the boards and battens into. If there isn’t plywood or OSB, you can install vertical furring strips at 1½- to 2-foot intervals to nail the boards and battens to.

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