Foundation Repair Methods: Helical Piers vs Push Piers vs Slabjacking

A Burbank homeowner in the Magnolia Park neighborhood noticed hairline cracks appearing along her living room baseboards in late 2022. She ignored them for months, assuming they were normal settling. By the time she called for a professional inspection, the cracks had widened into visible gaps, doors no longer closed properly, and the foundation had shifted nearly half an inch. What started as a manageable repair problem had become a structural emergency requiring extensive underpinning work. The lesson: foundation issues don’t improve on their own, and choosing the wrong repair method can leave your home vulnerable to further damage, water intrusion, and costly remediation down the line.

Burbank’s mix of older post-war homes and mid-century construction sits on diverse soil compositions—from clay-heavy areas prone to expansion in the Media District to sandy, compressible soils in Rancho. These soil conditions, combined with California’s dry summers and occasional heavy rains, create the perfect environment for foundation movement. Whether you’re dealing with settling, cracking concrete, or bowing basement walls, understanding the three primary repair methods—helical piers, push piers, and polyurethane slabjacking—will help you make an informed decision with your home contractor in Burbank.

Understanding Your Foundation Problem First

Before selecting a repair method, you need a clear diagnosis. Foundation issues stem from specific causes: expansive clay soils that swell when wet and shrink when dry, poor initial compaction under the slab, inadequate drainage allowing water to pool against the foundation, tree roots forcing concrete upward, or age-related deterioration in homes built before modern building codes. Burbank homes from the 1950s through 1970s often lack the drainage infrastructure that newer construction includes, making water management a common culprit.

A licensed structural engineer or foundation specialist can assess your specific situation by examining crack patterns, measuring settlement with laser levels, and analyzing soil composition. Vertical cracks indicate settlement; diagonal or stair-step patterns suggest differential movement; horizontal cracks signal possible bowing walls or hydrostatic pressure. This diagnosis determines which repair method will actually solve your problem rather than just mask it temporarily.

Helical Piers: Best for Light Structural Loads

How Helical Piers Work

Helical piers function like giant screws driven deep into the ground until they reach stable, load-bearing soil layers. Each pier consists of a steel shaft with helical plates welded around it. A crew uses specialized equipment to rotate the pier into the earth, similar to drilling, until it achieves the required torque—an engineering measurement that confirms the pier has reached competent soil. Once the pier is seated, hydraulic jacks lift the foundation back to its original level and anchor it to the pier system.

Ideal Applications and Advantages

Helical piers work best for single-story homes, additions, decks, and other structures with lighter loads. They’re particularly valuable for Burbank properties where expansive soil near the surface makes surface footings unreliable. Installation is relatively quiet and causes minimal disruption to landscaping or nearby structures. Unlike push piers, which require drilling through the foundation, helical systems can be installed entirely outside the footprint, leaving interior spaces undisturbed. They adapt well to sloped terrain common in some Burbank neighborhoods and perform reliably in clay-heavy soil once the pier reaches deeper, more stable layers below the active zone where seasonal moisture changes occur.

Limitations and Long-Term Performance

Helical piers aren’t suitable for heavy loads like multi-story homes or buildings with concentrated point loads. They require deeper drilling in areas with thick topsoil—a consideration in some Burbank locations. The helical plates can corrode over decades in aggressive soil environments, though epoxy coating mitigates this. Installation costs reflect the drilling depth and soil resistance, and warranty periods typically span 25 to 30 years when properly installed by certified contractors. Regular inspections every 5 to 7 years help identify corrosion or settlement patterns early.

Push Piers: The Heavy-Duty Underpinning Solution

Installation Process and Mechanism

Push piers (also called resistance piers) are hollow steel tubes that contractors install by hydraulically pushing them through the foundation into the soil below. The system works from inside the building, using the weight of the structure itself as leverage. A hydraulic ram pushes the pier tubes deeper until they reach stable bearing strata. Jacks then incrementally lift the foundation, restoring it toward its original elevation while the piers transfer the load to deep, competent soil.

When Push Piers Are Necessary

Push piers handle the demands of multi-story homes, structures with heavy point loads (like load-bearing walls), and foundations experiencing significant settlement. They excel in Burbank’s older neighborhoods where subsurface conditions vary widely. Because they work through the existing foundation, they don’t require extensive excavation or disruption to landscaping. Push piers can be installed in basements with limited headroom and work effectively even when access around the exterior is constrained. They’re the standard solution for severe settlement affecting multiple foundation points.

Trade-Offs and Performance Expectations

Push piers require interior access, meaning contractors must work inside basements, crawlspaces, or through openings in the slab. This creates temporary inconvenience but provides better control over the lifting process. The system demands precise engineering calculations and sequential installation—each pier is installed, seated, and jacked in a coordinated sequence to prevent uneven lifting that could crack walls or damage framing. Warranties typically extend 25 to 30 years. Push piers can settle slightly over time as soil consolidates, but competent installation minimizes this. They’re more expensive than helical piers due to labor intensity and equipment requirements, but the longevity and reliability justify the investment for serious structural issues.

Polyurethane Slabjacking: Fast Concrete Lifting

The Chemistry and Application Method

Polyurethane foam slabjacking (also called foam jacking or leveling) injects expanding foam beneath a sunken concrete slab through small holes drilled across the affected area. The two-part polyurethane compound expands and hardens in minutes, generating lifting force that gradually raises the concrete back to level. Unlike traditional mud jacking, which pumps heavy slurry that can compact and settle, polyurethane creates a lightweight, closed-cell foam structure that maintains stability long-term.

Ideal Use Cases in Burbank

Slabjacking is perfect for concrete patios, garage slabs, pool decks, and driveways that have settled unevenly due to soil consolidation or moisture loss. Burbank homeowners with mid-century homes often face sunken concrete porches or garage slabs where soil beneath has settled. Polyurethane jacking lifts these surfaces quickly—often completed in a single day—without the excavation and replacement required by removing and repouringconcrete. It’s especially valuable for properties with mature landscaping where replacing concrete would destroy established gardens or hardscaping. Exterior concrete is often part of the property’s value proposition, and leveling it preserves curb appeal while preventing trip hazards.

Advantages and Limitations

The speed and minimal disruption of slabjacking make it attractive: no heavy equipment, no extended construction timelines, and typically no need for reinforcing steel. The foam is waterproof and won’t recompact like traditional mud jacking. However, slabjacking doesn’t address the underlying cause of settlement—if poor drainage or expansive soil caused the problem, the concrete may sink again. It also requires precise diagnosis to confirm the void beneath the slab; if settlement stems from deep foundation movement rather than surface soil consolidation, foam jacking alone won’t solve the structural issue. Warranty periods vary by contractor but typically cover 5 to 10 years. The foam can expand differently in cold weather, so timing of installation matters in California’s temperature variations. For serious foundation problems involving the home’s primary structure, slabjacking is a supplementary solution, not a replacement for piering systems.

Comparison Table: Which Method Fits Your Situation

Factor	Helical Piers	Push Piers	Polyurethane Slabjacking
Best For	Light loads, single-story, additions, decks	Multi-story homes, severe settlement, heavy loads	Concrete slabs, patios, garage floors, driveways
Installation Location	Exterior, below foundation	Interior (basement, crawlspace)	Drilled through concrete surface
Disruption Level	Minimal to moderate (excavation)	Moderate (interior work)	Minimal (small holes only)
Installation Time	3–7 days (multiple piers)	5–14 days (sequential jacking)	1–3 days
Warranty Period	25–30 years	25–30 years	5–10 years
Addresses Root Cause	Yes (transfers load to stable soil)	Yes (transfers load to stable soil)	Partial (solves surface settlement only)
Soil Conditions (Burbank)	Excellent in clay-heavy areas requiring deeper piers	Reliable for variable subsurface conditions	Works for surface consolidation, not deep settlement

Soil Conditions and Local Burbank Considerations

Burbank’s geology varies significantly across its five ZIP codes. Downtown Burbank and areas near the Magnolia Park neighborhood sit on older alluvial deposits with high clay content—ideal for helical piers that need to reach deeper, stable strata. The Media District and Rancho areas have sandier soils that compact differently, sometimes favoring push piers when settlement affects the primary structure. All Burbank neighborhoods face seasonal moisture variations: summer drying shrinks clay soils, winter rains expand them, creating cyclical stress on foundations. This makes proper drainage management critical alongside any repair method you choose.

Homes built before 1970 in Burbank often lack proper grading and perimeter drainage. Water pooling against the foundation accelerates settlement and allows hydrostatic pressure to compromise basement walls. Before committing to any piering system, have a licensed contractor evaluate your site’s drainage. Sometimes the most cost-effective solution combines modest grading improvements, gutter extensions, and foundation drainage systems with conservative piering rather than aggressive underpinning of a well-drained site.

Selecting the Right Contractor and Ensuring Proper Installation

Credentials and Licensing Requirements

California requires foundation repair contractors to hold a C-53 Underpinning and Foundation Repair license, plus general contractor (Class B) licensing. Verify these credentials with the California Department of Consumer Affairs before hiring anyone. Ask for proof of liability insurance (minimum 1 million dollars) and workers’ compensation coverage. Check references from completed projects in Burbank specifically—local experience with area soil conditions matters. A licensed contractor in Burbank can explain why they recommend a specific method for your property, not just push the cheapest option.

Getting a Structural Engineer Report

Insist on a structural engineer’s report before starting work. The engineer should diagnose the cause of settlement, specify the repair method, calculate required pier depth and load capacity, and establish elevation targets. This report protects you by ensuring the solution addresses your actual problem and prevents contractors from over-building or under-building the repair. Many foundation companies employ or partner with engineers; some charge separately for reports. This transparency matters for your property investment—Burbank homes averaging around $880,000 require professional-grade solutions, not guesswork.

Checklist for Your Foundation Repair Project

Before You Hire: Obtain written estimates from at least three licensed contractors. Have a structural engineer assess the problem independently. Verify licensing, insurance, and local references. Get a detailed scope of work specifying the repair method, number of piers or slab areas, elevation targets, and warranty terms. Ask about soil testing and how the contractor determined pier depth requirements.

During Installation: Request daily progress photos documenting pier installation and jacking sequences. Ensure the contractor is performing soil testing or torque verification as specified in the engineer’s report—these confirm piers reach stable soil. Monitor elevation measurements to confirm the foundation is being restored within engineer-specified tolerances. Confirm drainage improvements (if recommended) are completed alongside piering work.

After Completion: Obtain a copy of all pier installation reports, jacking records, and elevation surveys. Take photos of cracks for future reference. Schedule a walk-through with the contractor to confirm all work matches the scope. Get written warranty documentation specifying coverage duration and what’s included. Plan annual inspections for the first few years to monitor for any additional movement.

Long-Term Maintenance: Maintain gutters and downspouts to prevent water pooling near the foundation. Keep landscaping at least 3 to 5 feet from the foundation to prevent tree roots from destabilizing repairs. Monitor for new cracks or doors that stick—these indicate potential ongoing settlement requiring follow-up assessment.

Protecting Your Investment and Home Value

Foundation repairs directly impact resale value. Buyers conduct professional home inspections, and a well-documented foundation repair with structural engineer reports and long-term warranties demonstrates that the issue was taken seriously and solved correctly. Conversely, visible cracks without evidence of professional repair create doubt and appraisal problems. Burbank’s median home value of $880,000 means foundation problems can cost you significantly in buyer confidence and negotiating power if left unaddressed or repaired poorly.

Rental properties face additional considerations. Tenants rarely understand foundation issues, but settling can cause doors to stick, windows to jam, and walls to crack—leading to maintenance complaints and potential habitability disputes. Addressing foundation problems protects your rental income and reduces liability risk.

If you’re facing foundation concerns in Burbank, don’t wait for problems to worsen. Contact Hollywood Contractor Corp today at (818) 264-1955 for a free evaluation. Our licensed team has repaired hundreds of Burbank homes using helical piers, push piers, and other proven solutions. We’ll connect you with a structural engineer, provide detailed recommendations, and handle installation with the precision your home’s stability demands. Your foundation isn’t something to compromise on—it’s the literal foundation of your $880,000 property investment.