"Donald and Guiles came to complete a job at my home in Granby, MA in September 2026. They were extremely professional from start to finish. They arrived on time and took the time to thoroughly explain everything before beginning the project. Throughout the process, they kept me informed and made sure I understood what was happening every step of the way. They worked slowly, carefully, and thoughtfully to ensure the project was completed without causing any damage to my concrete slab. They also pitched my slab perfectly, which was very important to me. I truly appreciate the care, attention to detail, and professionalism they put into the entire job. I would highly recommend them!"
"Thrasher did an excellent job repairing our driveway. They leveled out the entire driveway with amazing precision, and they fixed all the gaps with an attractive sealant that blends beautifully with the concrete. All of the team members I interacted with were professional and polite. I am very pleased with the results and only wish I’d called them sooner."
"Our sump pump broke and the line froze, so they replaced it with a triple pump system with freeze guards that keep the water from freezing outside and blocking the line. The new sump pump system is so much nicer, bigger, and SO quiet. The electrician, Greg, went out of his way to find a circuit with one item on it and tied into that so we did not need any drywall ripped up...very nice. We have also been battling a basement leak for almost ten years. Jason came and identified the problem and the required fix, then went above and beyond to make sure that all the prep work was done properly and that we were satisfied with what was about to happen, he even came and helped the guys for a while! Mel and his team came, dug up the concrete, and laid a drainage system across one wall of the basement, and took it into the sump pump. At first, I was scared to death listening to all the jackhammering, but from the minute they walked in, the guys were so conscientious about doing everything right and without major upset to our house, it put me right at ease. They were very fast, and the finished product looks amazing, so professional and clean. The entire experience was unbelievable, they all were so helpful, pleasant, knowledgeable, professional. I would recommend Thrasher, hands down, to anyone with any type of basement issue!
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.
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.
Most projects take 1-3 hours, with immediate usability after completion.
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.
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.
The O Neill, NE homeowners’ guide to concrete mudjacking services
From average costs to expert advice, get all the answers you need to get your job done.
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.
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.
