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>

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Q: Is mudjacking worth it?

• <div><p>Mudjacking can be an expensive foundation repair process, but in many cases, it&rsquo;s well worth the investment. This is especially true if you&rsquo;re lifting a portion of sunken foundation slab back into place. In that case, mudjacking can help avoid major structural damage and even home collapse by restoring the integrity of your structure with minimally invasive procedures. Mudjacking a concrete patio, walkway, or sidewalk can be worthwhile because it removes tripping hazards and makes your outdoor area more aesthetically appealing.</p></div>

Q: How long does mudjacking take to dry?

• <div><p>Mudjacking normally takes between one to three days to dry completely. The larger the project area, the more time it will take to dry. You should not walk on the concrete or place furniture or vehicles on the lifted concrete until it&rsquo;s completely cured, which a pro can help determine. If you&rsquo;re polyjacking instead, the polyurethane foam can take just a few minutes to dry, but wait an hour to be sure.</p></div>

Q: What is the best underpinning method?

• <div><p>Generally speaking, push piers&mdash;or steel piers&mdash;are the best option for underpinning, as they reach down to solid bedrock to find support for your foundation rather than relying on soil, which could be subject to the same issues as the soil directly below your foundation. However, the best underpinning method for your home depends on your location, how far down the bedrock is, and the type of soil in your area. Helical piers are usually the best option for sandy soil or in areas where the bedrock is too deep to use steel piers. </p></div>

Q: How long does it take for polyjacking to cure?

• <div><p>The polyurethane used for polyjacking will expand and cure in 15 to 30 minutes. After that point, your slab will be safe to walk on and even drive on in the case of a sidewalk or concrete driveway. Double-check with your concrete lifting specialist to confirm a curing timeline, as products can differ. </p></div>

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Verified Reviews for Concrete Mudjacking pros in Cowansville, PA

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

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Last update on November 25, 2025

Reviewed in June 2024
I highly recommend Mitchell Masonry. Brent is very knowledgeable and does excellent work. Had new flashing installed as well as tuck pointing on my chimney. The concrete crown he installed on the chimney is a huge improvement over the original and looks great.
Mitchell Masonry and Restoration
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Reviewed in November 2022
Beware of this contractor, do your homework. Steve is a personable guy and comes across very friendly but doesn't listen, cuts corners, and will defer you to his attorney if you have problems with his work. Our property is now de-valued because he was there. - Water lines all over the building...
Steve Wright & Associate Inc
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Reviewed in July 2019
The four-man crew did great work installing interior french drains around the entire perimeter, two sump pumps, and a drain on our concrete patio (foremen: George and Bobby, supervisor: Steve). Everything is working and the basement is dry. They were efficient and did everything I expected. ...
Highlander Waterproofing, Inc
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Reviewed in July 2017
If Cathy and I could give Bob and his workers and finishers 10 stars here on Home Advisor, we would surely do it!! Bob and his crew consistently show up early and on time. Our project was a complicated one that was very large (over 4000 square feet) including a stamped patio and had multiple...
RC Guffey Construction Company
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Reviewed in June 2016
They confirmed each appointment and showed up when they said. The salesman was very knowledgeable and explained any potential pitfalls including a potential $1200 extra charge if the needed to rent air hammers to break up the concrete. The quote I got was a lot less than expected especially...
Advanced Basement Solutions
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Reviewed in October 2013
It went very well. They masked off the garage walls and concrete sidewalks to prevent over-spray. They put up a barrier to keep vehicles off the driveway. This is a family operated business and I have dealt with them in the past. They are very professional and extremely honest to deal with. ...
Josh Lovell Paving
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Reviewed in June 2013
The construction started last fall with the excavation for the footer of the wall and then the wall was built on top of that. The wall was built with approximately 500 versa lok blocks. Once the wall was built it was backfilled with gravel to provide the proper drainage and then top soil was...
R Bergia Construction
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