Polyurethane Injection Technology

What Is Slabjacking?

Understanding the Concrete Lifting Process

Slabjacking—also known as mudjacking, polyjacking, or pressure grouting—is the process of lifting and stabilizing settled concrete slabs by injecting a specialized grout or polyurethane foam beneath them. This proven technique restores concrete surfaces quickly, cost-effectively, and with minimal disruption to ongoing operations.

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What Exactly Is Slabjacking?

Slabjacking is the process of lifting and stabilizing settled concrete by injecting grout or polyurethane foam beneath the slab. Also known as mudjacking, polyjacking, or pressure grouting, it restores the slab’s level and structural integrity without costly demolition. The process begins by drilling small access holes and pumping material into the voids below—lifting the slab evenly and securely.

A Smarter Alternative to Replacement

Traditional “rip and replace” methods require tearing out slabs and halting operations. Slabjacking provides the same structural correction in hours instead of days—keeping your facility running and costs under control.

Problems Solved by Slabjacking

Concrete Settlement and Voids

Soil movement, erosion, and poor compaction leave unsupported voids beneath slabs, leading to cracking and uneven surfaces.

Disrupted Business Operations

Replacing concrete can shut down operations for extended periods. Slabjacking allows work to continue with minimal downtime.

High Replacement Costs

Traditional rip-and-replace methods involve heavy demolition, debris removal, and long curing times. Slabjacking minimizes labor and material waste.

Key Advantages of the Slabjacking Process

Precision Lifting Control

Modern polyurethane systems allow precise lift control through multiple injection points, preventing overcorrection or stress on existing slabs.

Fast Curing, Minimal Downtime

Polyurethane expands and hardens within minutes—returning floors, highways, and warehouse slabs to service almost immediately.

Smaller Access Holes, Cleaner Finish

Unlike traditional mudjacking, polyurethane requires holes about the size of a penny, resulting in a neater surface and less visible repair marks.

Ideal for Occupied or Operational Sites

Because it’s quiet, clean, and fast, slabjacking can be performed in active industrial facilities, warehouses, or commercial settings without interruption.

The first step in slabjacking involves drilling small diameter access holes in the concrete slab.

Once the holes are drilled, a specialty grout is injected through the concrete, ultimately lifting it from below.

The access holes are patched with a fast-setting cement once the lifting work is complete.

Why Choose EFT for Slabjacking in New England

Over two decades of slabjacking and structural repair experience
Specialized polyurethane injection systems for precise control
Proven success with warehouse floors, highways, and industrial slabs
Minimal disruption and rapid return to service
Fully licensed, insured, and locally owned

Testimonials

Concrete Lifted, Business Uninterrupted

"EFT lifted our loading dock slab during production hours. Their precision and cleanup were impressive—we never had to stop operations."

Chris - Operations Manager, Tyngsboro, MA

Highway Slab Restored Overnight

"The team completed a section of settled roadway in one evening. Traffic resumed the next morning as planned. Excellent work!"

Angela - DPW Engineer, Concord, NH

Warehouse Floor Back in Service the Same Day

"They stabilized a large section of our warehouse floor using polyurethane injection. The floor was ready for forklifts within an hour."

Mike - Operations Supervisor, Manchester, NH