Does expanding foam lift concrete?

• <div><p>Yes, expanding foam (also known as polyurethane foam) can lift concrete. This approach, called polyjacking, involves injecting the foam rather than concrete slurry to fill voids and raise the concrete slab back into place. It’s often faster and requires smaller drill holes than traditional mudjacking, though it may come at a higher cost. Some contractors also prefer <a href="https://www.angi.com/articles/mudjacking-vs-polyjacking.htm">polyjacking over mudjacking</a> for more damaged and delicate slabs.</p></div>

Get matched with top concrete mudjacking pros in King City, CA

Q: Is there an alternative to underpinning?

• <div><p>There is no real alternative to underpinning, although mudjacking and polyjacking are other repair methods that can add support from underneath your foundation. Rather than placing supportive piers under your structure, these involve pumping a material under your slab to lift a sunken section back into its original position. Polyjacking, in particular, is sometimes a suitable solution for stabilization issues under slab foundations, but underpinning is often accepted as the best and most permanent solution.</p></div>

Q: How much foundation sinking is too much?

• <div><p>Most houses are expected to settle over time, but foundation sinking of more than a few inches or uneven sinking of more than an inch for every 20 feet is cause for concern. Any significant or uneven sinking should be assessed by a professional to determine the cause and perform any necessary repairs. </p></div>

Q: How much does concrete leveling cost?

• <div><p>Costs range from $500 to $1,500, depending on the size and condition of the area.</p></div>

Q: How long does it take for mudjacking to dry or cure?

• <div><p>Mudjacking typically takes 24 to 72 hours (one to three days) to dry and cure completely before you can resume normal use. The total drying time can vary depending on the size of the project. Because the slurry mixture contains cement, it needs to harden fully to prevent the concrete slab from shifting under added weight. You should avoid walking on the concrete or placing heavy items like furniture or vehicles on the surface until it has fully set. Your concrete contractor can provide a precise timeline. As a point of comparison, if you opt for polyjacking, the polyurethane foam can dry in minutes, but it's recommended to wait about an hour before use.</p></div>

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Verified Reviews for Concrete Mudjacking pros in King City, CA

*The Angi rating for Concrete Mudjacking companies in King City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Concrete Mudjacking needs.

*The HomeAdvisor rating for Concrete Mudjacking companies in King City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Concrete Mudjacking needs.

Last update on July 29, 2026

Reviewed in July 2026
Miguel did an excellent job installing my Dog door through the wall. He was professional, respectful, and took the time to ask questions before starting to make sure everything was exactly how I wanted it. His work was clean, precise, and completed efficiently. One thing that really stood out...
Galvans Maintenance and Hauling
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Reviewed in November 2025
Had to replace my toilet and garbage disposal he responded very quickly and had both replaced in a very timely manner. Great customer service and the price was reasonable will definitely call him again.
Brewer Plumbing Solutions
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Reviewed in August 2025
Maplewood Landscaping did a commercial landscape install at our daycare facility and we were very happy with the results. Their pricing was honest, and Cesar, the project manager, kept great communication throughout the entire process. The work was completed professionally and on time. We look...
Maplewood Landscaping, Inc.
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Reviewed in April 2025
Velasco Landscaping did an amazing job installing pavement at my property! From start to finish, the team was professional, efficient, and detail-oriented. The quality of the work exceeded my expectations, and the finished pavement looks fantastic—clean lines, solid craftsmanship, and it’s built...
Velasco Landscaping
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Reviewed in August 2024
Golden State Roofing exceeded all my expectations. From start to finish, their professionalism, attention to detail, and quality of work were outstanding. They communicated clearly throughout the entire process and made sure everything was done on time and to the highest standard. The team was...
GOLDEN STATE ROOFING GROUP INC.
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Reviewed in July 2022
It was great working with this business and all work went smooth while I did not have to worry about anything, and end results were satisfactory.
Izzy's Handyman Services
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Reviewed in April 2021
I had a new roof and a high efficient hot water heater installed. I’m extremely happy with both. Every single person I had contact with was so professional, courteous, knowledgeable and clean. I would use them again for anything I should ever need for my home. I understand they do windows and...
Bright Home Energy Services
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Reviewed in March 2021
Great communication. Very professional. Prices are great. Wouldn’t go to anyone else!
rollingbayconstruction
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Reviewed in August 2020
Called on a Sunday afternoon, . Came out, ran my mainline for sewer. Great job and fast
Mr. Fix It Repairs - Unlicensed Contractor
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Reviewed in December 2019
Gilbert M Rosas Tile did good a job, in a timely manor. No problems what so ever.
Gilbert M Rosas Tile - Unlicensed Contractor
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Find Concrete mudjacking pros in King City

Just Stamping Concrete

5.0(

)

Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For Business

Serving King City, CA and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

"I hired this service to design my backyard and I couldn't be happier with the outcome. The designer was able to take my vision and turn it into a beautiful reality. They provided a detailed plan and were able to work within my budget. The installation team was professional and the work was completed on time. I highly recommend this service for anyone looking to enhance their outdoor living space."

Response time2 hrs

Response rate100%

4 neighbors recently requested a quote

Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For Business

Serving King City, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"Groundwork’s did an amazing job. Our home was settling and they were able to lift it. The process was quick and all employees from sales to crew were all very professional."

+16

109 neighbors recently requested a quote

Recommended by12%of homeowners

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NorCal Foundation Support

3.0(

)

Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For Business

Serving King City, CA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"My project is just a small one and they did took time to check it out. Good courtesy"

38 neighbors recently requested a quote

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Mega Power Electric, Inc

5.0(

191

)

Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For Business

Serving King City, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Mega Power Electric is an excellent company to work with. Gary and his team are knowledgeable, honest, and will go out of their way to get the job done right. We installed panels and solar battery storage unit in our home and we're reaping the benefits of being clean and green."

+32

Recommended by100%of homeowners

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Blue Pacific concrete

New to Angi

Concrete - Injection Leveling - Mudjacking

Serving King City, CA and surrounding areas

In business since 1999

Blue Pacific can take care of any concrete need you have. We use our 10 years of experience to bring you quality and customer service. We can do repairs, installs, residential, and commercial. Give us a call for all your needs!

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Dwayne Martin Jr., Bobcat Grading

New to Angi

Concrete - Injection Leveling - Mudjacking

Serving King City, CA and surrounding areas

In business since 2017

Free estimates

Offers commercial services

Our company is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customer's interests and make their concerns the basis of our business. Please give us a call today!

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Concrete Mudjacking questions, answered by experts

Yes, expanding foam (also known as polyurethane foam) can lift concrete. This approach, called polyjacking, involves injecting the foam rather than concrete slurry to fill voids and raise the concrete slab back into place. It’s often faster and requires smaller drill holes than traditional mudjacking, though it may come at a higher cost. Some contractors also prefer polyjacking over mudjacking for more damaged and delicate slabs.

There is no real alternative to underpinning, although mudjacking and polyjacking are other repair methods that can add support from underneath your foundation. Rather than placing supportive piers under your structure, these involve pumping a material under your slab to lift a sunken section back into its original position. Polyjacking, in particular, is sometimes a suitable solution for stabilization issues under slab foundations, but underpinning is often accepted as the best and most permanent solution.

Most houses are expected to settle over time, but foundation sinking of more than a few inches or uneven sinking of more than an inch for every 20 feet is cause for concern. Any significant or uneven sinking should be assessed by a professional to determine the cause and perform any necessary repairs.

Costs range from $500 to $1,500, depending on the size and condition of the area.

Mudjacking typically takes 24 to 72 hours (one to three days) to dry and cure completely before you can resume normal use. The total drying time can vary depending on the size of the project. Because the slurry mixture contains cement, it needs to harden fully to prevent the concrete slab from shifting under added weight. You should avoid walking on the concrete or placing heavy items like furniture or vehicles on the surface until it has fully set. Your concrete contractor can provide a precise timeline. As a point of comparison, if you opt for polyjacking, the polyurethane foam can dry in minutes, but it's recommended to wait about an hour before use.

The King City, CA homeowners’ guide to concrete mudjacking services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

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How Much Does Polyurethane Concrete Lifting Cost? [2026 Data]
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How to Raise a Sunken Concrete Slab With DIY Mudjacking
DIY mudjacking is an advanced task, but learning how to raise a concrete slab is great to know for many scenarios. Let's take a look at how to DIY mudjack.
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•
May 3, 2026May 3, 2026
5 Questions to Ask About Concrete Injection Leveling and Mudjacking
Sunken concrete can be a structural issue, but a professional can easily repair it. Ask these concrete injection leveling and mudjacking questions before you hire.