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 basement insulation need a vapor barrier?

• <div><p>Yes, basement insulation needs a vapor barrier due to its susceptibility to moisture seeping in from the outside of the house. You should install a moisture barrier before you <a href="https://www.angi.com/articles/how-to-install-insulation.htm">install insulation</a> or purchase insulation that comes prebuilt with a moisture barrier to avoid water damage in your insulation and costly mold and water remediation expenses. </p><p> </p></div>

Best doorbell installation pros near Dickinson, ND

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Verified Reviews for Doorbell Installation pros in Dickinson, ND

*The Angi rating for Doorbell Installation companies in Dickinson, ND 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 Dickinson, ND 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 October 24, 2026

Reviewed in October 2026
Prompt and efficient service. The gentleman who did the work was professional and respectful of my property. He did a very nice job and cleaned up after he was done. I was very impressed.
LeafFilter Gutter Protection
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Reviewed in March 2023
Martyniuk remodeling does a fantastic job! Highly recommended. Did my tile, my carpets and installed my deck. Phenomenal work!
Martyniuk Remodeling
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Reviewed in April 2022
Install went smooth, installer showed up in a timely manner, he cleaned up and removed the old tub as well. Finish work and calking was exceptional done. I would recommend Bath Planet.
Your Home Improvement Company, LLC
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Reviewed in December 2021
Jason answered my phone call right away, set up a time to meet within a few days, scheduled to install the linoleum shortly after, and installed it in a very timely manner to complete the project!! He is very friendly and kind to work with! We highly recommend Jason Golden. He does good work!
The Golden Handyman, LLC
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Reviewed in July 2021
The work done was of a great quality. Even with a couple interesting twists when getting to installation of the new windows, the installers did a really nice job. The follow up after the installation was a good touch, making sure that it was done to our satisfaction and specifications.
Your Home Improvement Company, LLC
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Reviewed in February 2021
Very professional and easy to work with. They were knowledgeable and helpful with questions and did a tremendous job on the install.
Hellman & Sons Landscaping, LLC
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Reviewed in November 2020
Very satisfied with his work. He installed an insulated double door, put in a new window for me, and did electrical work in my chicken coop. Everything has been working great since he installed them over a year ago ?? Would definitely recommend Alpha Electric!
Alpha Electric
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Reviewed in May 2010
They came out and gave me an estimate for the gutters. Once I decided to use them I gave them a deposit and they were here later that same week to put up the new gutters. I do wish they had called before they came out instead of calling me at work once they were already here. Still everything...
Simon's Homes
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Reviewed in February 2007
PB&J did a magnifacent job in installing two shelves in my laundry room. They were very cooperative in meeting my limited schedule. I will most definitely rehire PB&J for later projects.
PB & J Remodeling
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Top-Rated Doorbell installation pros in Dickinson - Updated Nov 2026

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Doorbell Installation FAQs, answered by experts

While not every wall requires a vapor barrier, if you do need one and don’t install it, moisture can get between the walls of your home. This can lead to water damage from mold growth or rot, and the excess moisture could also attract pests, including termites, cockroaches, or ants.

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.

The cost to install a radiant barrier ranges from $700 to $2,800, depending on the size of your roof and the type you choose. Most people pay an average of $1,700 to install a radiant barrier. Foil options, both single- and double-sided, cost between $0.10 and $0.90 per square foot, while spray-on options start at $0.60 and go all the way up to $1 per square foot—which can add up quickly.

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.

Yes, basement insulation needs a vapor barrier due to its susceptibility to moisture seeping in from the outside of the house. You should install a moisture barrier before you install insulation or purchase insulation that comes prebuilt with a moisture barrier to avoid water damage in your insulation and costly mold and water remediation expenses.

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