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>

Can I use canned spray foam as insulation?

• <div><p>Canned spray foam has an R-value of R-3.7 per inch. However, it’s not great for use as insulation. Also known as single-component spray foam, it doesn’t expand as much as two-part types that work for insulating the whole house. Save the canned foam for gaps around doors and windows.</p></div>

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Q: What type of window covering is most energy efficient?

• <div><p>When it comes to window coverings, cellular shades are typically known as the most energy-efficient option. Cellular shades are also known as honeycomb shades. They are made of a soft fabric and take the form of &ldquo;honeycomb&rdquo; cells. These cell pockets trap air in and around your windows, providing insulation.</p></div>

Q: How long does it take to remove blown-in insulation from an attic?

• <div><p>Depending on the size, insulation condition, and removal method, it can take anywhere from four hours up to twenty hours. Therefore, be prepared to split the projects into phases, or leave it to a professional. Insulation is an intermediate project with various risk factors and can be challenging to someone unfamiliar with the process.</p></div>

Q: Does a monolithic slab need insulation?

• <div><p>Monolithic slabs don&rsquo;t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.</p></div>

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*The Angi rating for Drywall Insulation companies in Underwood, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Drywall Insulation needs.

*The HomeAdvisor rating for Drywall Insulation companies in Underwood, WA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Drywall Insulation needs.

Last update on November 28, 2025

Reviewed in October 2025
I’ve hired Spencer multiple times and would definitely hire him again! He did an excellent job building railings for my back porch and stairs, did some great plumbing and drywall work, and has helped me with various other home improvement tasks. He’s reliable, professional, trustworthy, and...
S & G Builders
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Reviewed in September 2024
If you're looking for a business that communicates well, hears you & values your input and BEST of all, handles your project as if it was theirs personally.... you've found them! They built a 30x36 post frame, fully insulated metal shop for us and we couldn't be happier. They...
Abel Construction LLC
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Reviewed in October 2022
Answered any questions I had on the project. All costs up front. Owner did the work with a helper to finish the job in a timely matter. Pipes and pressure tank rerouted and insulated to my satisfaction! Overall excellent work.
Mountain Pumps & Plumbing LLC
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Reviewed in June 2022
Efficient and professional - came on time and got our attic insulated
Puget Partners Insulation, LLC
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Reviewed in March 2022
It's tough to find an electrician. They were prompt, told me exactly what they were going to do, showed me the work after they were done, and did a great job cleaning up all the dust and insulation.
Emerge Electrical, LLC
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Reviewed in May 2019
This was a major project, a two-story, five bedroom house, that naturally caused disruption in our daily routines, but Edwin and his crew were especially sensitive to our needs and our comings and goings. The house was being prepared to go on the market, and Edwin seemed to know exactly what was...
JC Custom Painting LLC
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Reviewed in July 2015
He worked one day for nine hours. At the end of the day I asked if he was coming back tomorrow and he said he had "obligations" and wouldn't be back for two weeks. I don't believe I should pay him the $450 he says I owe. He left two black indentations in my brand new walls, insulation and dust...
C T Building Inc
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Reviewed in December 2014
This project was to replace the floor that had become soft with a leak. In tearing it apart, black mold was found as well as dry rot. Not suprising, since our home was built in 1890. He replaced all of the old drywall, floor joists, and lath and plaster that was affected; Then proceeded to...
Duncustom Home Finish
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Reviewed in October 2014
They were so into checking the operation and functionality of the pre-existing equipment as well as the new installation. They were thorough. They were professional. They were careful. They cleaned the new garage doors after installation on the front and back. They didn’t charge me extra for the...
Genuine Garage Doors
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Reviewed in June 2014
John Eaton is an old-fashioned professional craftsman. He really knows his business and provides exceptional service with quality results. We are doing a major home remodel (2012) and he has done several areas of the house as we go from room to room. In some areas we are tearing drywall out and...
Eaton's Drywall Inc
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Golden Craft Construction

Golden Craft Construction

[email protected]

[email protected]

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BeeHouse

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BHR

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Columbia Insulation

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Boesel interior construction llc

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Easylivin' Home Repair Services

Towers United LLC

Towers United LLC

Integrity Foam Solutions Inc

Integrity Foam Solutions Inc

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