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: How long does polyjacking last?

• <div><p>Polyjacking can be a permanent solution to sunken concrete if you also address the underlying issue&mdash;like poor drainage&mdash;at the same time. The polyurethane material itself can last as long as or even outlast the concrete you&rsquo;re lifting it with. Your sunken concrete issue will likely return if you don&rsquo;t couple polyjacking with proper drainage to prevent future soil movement and sinking. </p></div>

Q: How do you level a sunken concrete patio?

• <div><p>Pros often use mudjacking or polyurethane foam injection to level a sunken concrete patio. Both methods lift the slab by filling voids beneath it. After properly compacting the soil beneath it to prevent future settling, the concrete may need to be removed and re-poured for severe sinking. </p></div>

Q: Do concrete mudjacking companies need to be licensed?

• <div><p>Most states and municipalities don&rsquo;t require concrete mudjacking companies to carry a specific license, but they usually need to have a general contractor&rsquo;s license, and they should be fully insured. The only exception is if the mudjacking company provides foundation repairs as well, or if it offers mudjacking for home foundations. In that case, they will typically need a foundation repair contractor&rsquo;s license. You can check state requirements and then use Angi&rsquo;s <a href="https://www.angi.com/angi-license-check.htm">license lookup tool</a> to confirm that a company is properly licensed to provide mudjacking services in your area.</p></div>

Q: How long does concrete leveling take?

• <div><p>Most projects take 1-3 hours, with immediate usability after completion.</p></div>

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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.

Polyjacking can be a permanent solution to sunken concrete if you also address the underlying issue—like poor drainage—at the same time. The polyurethane material itself can last as long as or even outlast the concrete you’re lifting it with. Your sunken concrete issue will likely return if you don’t couple polyjacking with proper drainage to prevent future soil movement and sinking.

Pros often use mudjacking or polyurethane foam injection to level a sunken concrete patio. Both methods lift the slab by filling voids beneath it. After properly compacting the soil beneath it to prevent future settling, the concrete may need to be removed and re-poured for severe sinking.

Most states and municipalities don’t require concrete mudjacking companies to carry a specific license, but they usually need to have a general contractor’s license, and they should be fully insured. The only exception is if the mudjacking company provides foundation repairs as well, or if it offers mudjacking for home foundations. In that case, they will typically need a foundation repair contractor’s license. You can check state requirements and then use Angi’s license lookup tool to confirm that a company is properly licensed to provide mudjacking services in your area.

Most projects take 1-3 hours, with immediate usability after completion.

The Terry, MT homeowners’ guide to concrete mudjacking services

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

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