How do I add insulation to existing walls?

• <div><p>If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install <a href="https://www.angi.com/articles/blown-in-insulation.htm">blown-in insulation</a>. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than <b>$100</b>. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.</p></div>

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Q: What is the best R-value or thickest insulation for a 2x4 wall?

• <div><p>For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.</p></div>

Q: What's the best insulation for a garage?

• <div><p>Fiberglass is considered a favorite garage insulation choice due to its combination of affordability, ease of installation, and overall effectiveness. Fiberglass provides good thermal resistance, helping regulate garage temperatures and minimize heat transfer. Additionally, fiberglass is moisture-resistant, reducing the risk of mold or mildew formation. </p></div>

Q: Do I need a vapor barrier in my basement?

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

Q: Should you insulate your entire attic?

• <div><p>Yes. Proper, complete insulation will ensure that you trap the most cool or warm air inside your home, preventing high energy bills. In addition, insulation tends to settle and compress, leaving gaps over time; the more you insulate completely during the initial installation, the less you&rsquo;ll need to do down the line. </p></div>

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Verified Reviews for Doorbell Installation pros in Eureka, MT

*The Angi rating for Doorbell Installation companies in Eureka, MT 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 Eureka, MT 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 December 23, 2025

Reviewed in December 2025
Dynamic Plumbing was quick to respond, personable and provided options to get me the deal I was happy with. I would 100% recommend and hire again!
Dynamic Plumbing LLC
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Reviewed in August 2025
Good product but the absolute worst customer service.
Montana Dock and Deck INC
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Reviewed in June 2024
Luke's Service & Repair is excellent! Luke is very knowledgeable, professional and prompt. I highly recommend him!!
Luke's Service and Repair LLC
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Reviewed in November 2023
Hired company to tear down and replace wood patio cover. I expected the same style of patio. However, I was surprised when a better, more architectural design was presented, at no extra charge. Lumber was hauled away promptly. Patio installed and neatly painted. Honest people who do a great job....
J&M Home Inspections
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Reviewed in May 2023
They were really nice and did a quality work. They had a reasonable price and were on time. They were respectful of my property.
Handy Homes
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Reviewed in April 2023
Clint really cares about what he is providing and matches it up with the needs of the client.
Post Water Works LLC
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Reviewed in May 2021
They are hard working, personable, professional and great painters. They stand by their work, as they should for their work is amazing!! Our home looks like a million dollars and they are more than fairly priced and the quality is Extrodinair.
Blue Skies Painting
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Reviewed in May 2021
Absolutely fabulous! Renewal by Andersen did a great job. The windows are amazing and the workmanship is top notch. Waylin’s installation crew was fast, professional and a pleasure to work with. They installed the windows cleanly, and you couldn’t tell they were even there after all was said and...
Renewal by Andersen of Montana
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Reviewed in October 2019
Very thorough,took time to get the preparation work done, work done with care and protection for the house, no mess for me to clean up, delightful personality and very professional work completed, timely,highly recommend without reservation
Darryl Johnson Services
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Reviewed in August 2016
Marty was very professional and methodical while trying to figure out what was wrong my hot water tank. He didn't want to have the tank on less he had to, come to find out, the previous plumber installed a line wrong. Problem solved, I will definitely call him again for my plumbing needs.
The Plumbing Master, LLC
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Doorbell Installation questions, answered by experts

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

Fiberglass is considered a favorite garage insulation choice due to its combination of affordability, ease of installation, and overall effectiveness. Fiberglass provides good thermal resistance, helping regulate garage temperatures and minimize heat transfer. Additionally, fiberglass is moisture-resistant, reducing the risk of mold or mildew formation.

If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install blown-in insulation. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than $100. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.

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

Yes. Proper, complete insulation will ensure that you trap the most cool or warm air inside your home, preventing high energy bills. In addition, insulation tends to settle and compress, leaving gaps over time; the more you insulate completely during the initial installation, the less you’ll need to do down the line.

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