Polyjacking cost in Los Angeles depends on what is being lifted, the size and depth of the void, access, slab condition, drainage, and whether the movement is limited to a concrete slab or reflects a larger foundation problem. Polyjacking can be useful for certain sunken slabs, but it is not a universal substitute for structural foundation repair.
This guide explains when polyurethane foam lifting may be appropriate, what affects price, how it compares with other repair methods, and what an inspection should establish before work begins.
What Is Polyjacking?
Polyjacking—also called polyurethane foam injection—uses small drilled ports to place expanding material below a concrete slab. The material fills accessible voids and can raise the slab in controlled increments. Common applications include walkways, patios, driveways, garage slabs, pool decks, and some non-structural interior slabs.
The method does not repair every cause of movement. A cracked or settled slab may also be affected by poor drainage, leaking utilities, erosion, expansive soil, inadequate base preparation, tree roots, or a structural support problem.
When Polyjacking May Be Appropriate
- The slab remains sufficiently intact to lift.
- Settlement is associated with a void or loss of support below the slab.
- Access for injection is practical.
- The planned lift will not create drainage, doorway, or trip-height problems elsewhere.
- The slab is not being relied upon to solve a deeper structural-foundation issue.
What Affects Polyjacking Cost in Los Angeles?
Slab size and number of affected areas
A small walkway panel differs from a large driveway or multiple disconnected areas. Contractors should measure the affected surface and identify the anticipated injection pattern rather than quoting only by property size.
Depth and distribution of voids
Material use depends on the volume and accessibility of unsupported space. Hidden conditions mean estimates should explain how additional material will be handled if the void is larger than expected.
Amount and precision of lift
Minor stabilization may require less time than correcting several elevations around doors, drains, adjoining slabs, or finished surfaces. The objective should be agreed upon before injection begins.
Cracks, deterioration, and prior repairs
Polyjacking does not restore badly deteriorated concrete. Concrete with significant spalling, unstable cracks, failed reinforcement, or extensive patching may need a different repair plan. The American Concrete Institute’s concrete-repair guidance emphasizes evaluating the cause and removing unsound material when deterioration is present.
Drainage and soil conditions
If runoff, erosion, or a leak created the void, lifting without correcting the source can lead to renewed movement. EPA moisture-control guidance recommends directing surface and subsurface water away from foundations and building assemblies.
Permits and site constraints
Whether permits or engineered details are required depends on the address and scope. The Los Angeles Department of Building and Safety should be consulted for work within the city.
Polyjacking vs. Mudjacking
Both methods attempt to restore support below settled concrete. Polyjacking uses expanding polymer material; traditional mudjacking uses a cementitious slurry and usually requires larger holes. The best choice depends on the slab, access, desired lift, void conditions, and the contractor’s repair plan—not on a single marketing claim.
Polyjacking vs. Structural Foundation Repair
A sunken patio or walkway is different from settlement affecting a load-bearing foundation. Warning signs such as widespread floor elevation changes, sticking doors throughout the home, significant wall separation, damaged posts or beams, or movement at a perimeter foundation call for a broader foundation inspection.
For slab-specific damage, review NE Construction & Design’s concrete slab repair service. If the issue involves deeper bearing failure, underpinning may be evaluated separately.
Questions to Ask Before Approving Polyjacking
- What evidence indicates a void below the slab?
- Is the slab structurally suitable to lift?
- What caused the loss of support?
- What elevation is the contractor trying to achieve?
- How will drainage be preserved or corrected?
- What happens if more material is required?
- What cracking or cosmetic repair is excluded?
- What warranty applies, and what conditions are excluded?
Request a Site-Specific Evaluation
NE Construction & Design evaluates settled concrete and foundation concerns throughout Los Angeles County. The first step is identifying whether the problem is a limited slab void, deterioration, drainage, soil movement, or structural settlement.
Request a consultation to determine whether polyjacking or another repair method fits the actual site conditions.