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>

Should wall insulation be faced or unfaced?

• <div><p>Unfaced wall insulation is easier to cut and install, making it the better choice for a DIY project. It’s also more affordable. But if it’s unfaced, you’ll likely need to add a vapor barrier to reach your desired R-value and efficiency, as it doesn’t offer any moisture barrier.</p><p>Faced insulation uses paper or foil to create a built-in barrier and doesn’t require an extra step. It’s also more fire-resistant and safe. But it’s quite a bit more expensive and a little bit harder to work with as a DIYer.</p></div>

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Last update on June 25, 2026

Reviewed in June 2026
Jeff did a good job on the fence repair and door installation.
Premier Remodeling
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Reviewed in March 2026
Very friendly and communicative. Upgraded our electric panel and also happened to notice our doorbell wasn't working and helped with that too! Registered contractor with Focus on Energy so costs for panel upgrade are reduced based on income. Absolutely will call again when future needs arise.
All Nations Solar and Electric LLC
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Reviewed in July 2025
Great experience. Good communication and everything was installed in one day! Thank you!
Haulin Install, LLC
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Reviewed in October 2024
So far very well waiting to install storm door. Carlos is meticulous. Don Tolkacz
Peña Renovations LLC
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Reviewed in January 2024
Quote was great price. Fast install! Over all great company to work with
MNM DESIGN AND CONSTRUCTION
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Reviewed in August 2023
Arrived prompty, worked efficiently, answered my questions and thoroughly explained the product and installation process.
NEW Seamless Gutters
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Reviewed in May 2023
Great service, affordable pricing for the product, wonderful follow-up and installation process. They send someone out to follow-up post-install to make sure everything was done proper and to expectations. Very pleased with experience.
Creative Home Technologies, LLC
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Reviewed in May 2023
The door installation was completed to our satisfaction.
Happy Contractor
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Reviewed in January 2023
From estimate to installation everything went right on time. They worked with us around the holidays. The installation crew did a great job and cleaned the house before leaving. We had to move a piano so they could work and they even helped move it back in place! Thom, Mike, Jordan and Dave...
Windows of Wisconsin Inc
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Reviewed in October 2022
The installers were efficient and professional.
All Weather Insulation
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Doorbell Installation questions, answered by experts

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.

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.

Ensures uniform application and maximizes insulation effectiveness and energy savings.

Yes, you can install insulation behind drywall yourself, but only if your walls are not finished. If your studs are exposed, installing fiberglass insulation in roll or batt form is very straightforward and just requires a few tools and some safety equipment. If your walls are already finished and you’re looking to add insulation, it’s better to hire a professional, as you’ll likely need blown-in insulation, which can be dangerous to work with and a challenge to get into the proper areas in your wall voids.

Unfaced wall insulation is easier to cut and install, making it the better choice for a DIY project. It’s also more affordable. But if it’s unfaced, you’ll likely need to add a vapor barrier to reach your desired R-value and efficiency, as it doesn’t offer any moisture barrier.

Faced insulation uses paper or foil to create a built-in barrier and doesn’t require an extra step. It’s also more fire-resistant and safe. But it’s quite a bit more expensive and a little bit harder to work with as a DIYer.

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