Foundation Repair in Poway & San Diego County
Structural vs. Cosmetic: We Tell You the Difference

Cosmetic cracks are common in virtually all concrete foundations and do not indicate structural failure. They tend to be hairline width, run vertically, and stay the same width over time. Structural cracks are different in one or more ways: they are wider than 1/4 inch, they are horizontal (which suggests lateral soil pressure is loading the wall), they are diagonal and paired with other signs of differential settlement like sticking doors or sloping floors, or they are growing. BES distinguishes these at the free assessment. Most of what homeowners call to report turns out to be cosmetic, but the ones that are not need to be caught early.

It depends on the type of problem. Concrete crack injection, slab-on-grade surface repair, stem wall patching, and accessible slab leveling are within the scope of a qualified concrete contractor. Significant active settlement, wall deflection, deep underpinning, or engineered repairs requiring piers and calculations are structural engineering work and require a different type of contractor entirely. BES does not do pier-based underpinning or structural engineering. We tell you clearly at the assessment which category your repair falls into.

The main drivers in San Diego County's inland areas are expansive clay soils and drainage. Clay soils swell with moisture during winter rains and shrink during dry months, creating movement cycles that stress the foundation concrete over time. Poor drainage that directs water toward the foundation accelerates this. Plumbing leaks below the slab are another cause. Seismic activity can trigger or widen existing cracks. Unlike climates with hard freeze-thaw cycles, San Diego does not see frost heave, but the shrink-swell soil dynamic is more persistent than most homeowners expect.

A single foundation crack repaired with epoxy injection typically runs $300 to $800. Polyurethane injection for a water-bearing crack in a similar range. Stem wall surface repair is roughly $4 to $9 per square foot. Slab leveling depends on the area and how much lift is required. These are estimates, the assessment visit gives you a firm written number. BES does not quote over the phone on foundation repair because the conditions matter too much to estimate without seeing them.

Mudjacking, or slab jacking, is the process of injecting a grout or polyurethane foam mixture under a settled concrete slab to lift it back toward its original elevation. It addresses settlement of the slab itself, not structural cracking in foundation walls. It is appropriate for settled driveway panels, walkway sections, patio slabs, and in some cases garage floors or slab-on-grade sections where the underlying soil has compacted or eroded. BES assesses whether a settled slab section is a candidate for mudjacking or whether conditions make it a replacement job.

Signs of expansive clay soil movement in San Diego County include doors and windows that stick or do not close properly during different seasons, visible cracking in drywall near door and window corners, gaps between interior trim and floors or ceilings that change seasonally, and exterior concrete that shows repeated cracking at the same locations. Expansive soil issues do not resolve with foundation repair alone, drainage improvement and sometimes soil treatment are part of the long-term solution. BES notes soil and drainage factors at every assessment.

Yes, in many cases. Epoxy and polyurethane injection both work from the interior face of a foundation wall. For walls with water infiltration, interior injection needs to be paired with a waterproofing coat or crystalline treatment on the wall face. The most durable repair for a water-bearing crack in a wall that has exterior soil pressure is from the exterior side, but interior injection is often the practical option in a finished space. We assess the access options and tell you the trade-offs.

Monitor the repaired crack locations through at least one wet season. Use a pencil mark or crack monitor to track whether the crack width changes. If a repaired crack widens beyond its original measured width, it indicates continued movement and may warrant a structural engineer evaluation. New cracks at different locations, particularly horizontal or diagonal ones at corners, are also worth tracking. BES gives you the specific crack widths we documented at the repair and what to watch for before we leave the job.