How does polyurethane concrete leveling work?

Sunken concrete slabs, like driveways or sidewalks, can pose trip hazards and structural risks if left unaddressed. The polyurethane concrete leveling process restores level surfaces by injecting expanding high-strength foam that fills voids and lifts the slab precisely. This minimally invasive method uses lightweight, high-density foams, reacting quickly with moisture to expand and stabilize—achieving results in hours rather than days. Follow these steps for a smooth, durable fix.

Application

• Step 1 – Assess the Site: Survey the slab for settlement points, voids, and soil conditions using tools like laser levels or probes to plan hole placement and foam volume.

• Step 2 – Drill the Holes: Use a concrete drill to create 3/8-inch holes every 2-3 feet across the surface, spaced to allow uniform foam distribution without weakening the concrete.

• Step 3 – Inject the Foam: Pump two-component polyurethane foam through the ports; it expands up to 30 times its volume to fill voids, compact soil, and gradually raise the slab to the desired level—monitored with laser levels or dial indicators for precision.

• Step 4 – Seal: Patch the holes with concrete mix and allow a brief cure time before use.

Benefits

• Precision and Speed: Achieves lifts with pinpoint accuracy, curing in 15 minutes to minimize downtime (e.g., a 1,000 sq ft driveway done in half a day vs. weeks for replacement).

• Lightweight Durability: Foam weighs just 4-8 lbs per cubic foot, reducing future settling risks while resisting water erosion—ideal for residential patios or commercial warehouse floors.

• Cost-Effective Versatility: Saves 50-70% over demolition methods, applicable to slabs, sidewalks, or pool decks; works in dry or damp conditions without heavy machinery.