Foundation Evaluation & Repair Guidance

Foundation problems? Get clarity before choosing a repair.

Cracks, uneven floors, sticking doors, or other signs of movement? Request a property-specific foundation evaluation and understand the next step before committing to a repair.

Property-specific review

Foundation-focused help

Compare repair options

Mapped soil data can add useful context, but repair decisions should be based on evidence from the property itself.

Public Data Sources Referenced

USDAPublic Agency

NRCSSoil Survey Program

SSURGOMapped Soil Data

USGSPublic Geology Data

Foundation Warning Signs

Understand cracks, uneven floors, sticking doors, and other movement symptoms.

Local Soil Context

Use mapped USDA soil data to add context to what you are seeing at the property.

Foundation Evaluation

Request a property review and compare repair options before choosing a scope.

Free Property Tool

Check Your Foundation Risk

Look up mapped USDA soil context for a property address. Use the result as one piece of evidence when evaluating foundation symptoms and repair recommendations.

Mapped soil screening is not a diagnosis of the foundation.

Property Soil Check

Check Your Foundation Risk

Enter the property address to see mapped soil context, then use it to ask better questions about foundation movement and repair options.

Property address

Mapped soil screening only. This does not diagnose the foundation.

Why Foundation Repair Estimates Differ

Foundation repair estimates can differ because providers measure different areas, identify different causes, or propose different systems. The geological profile adds useful context, but the scope should ultimately be supported by property-specific observations and measurements.

What IS an “Active Zone”?

The Active Zone is the depth at which soil moisture fluctuates seasonally. Its depth varies by site and requires property-specific investigation to establish.

The practical question: Ask how the proposed system accounts for actual subsurface conditions, loads, access, and the evidence that movement is active.

How We Review Soil Context

1Identify your USDA Soil Map Unit.
2Explain mapped plasticity and shrink-swell indicators.
3Organize the questions to ask during a property evaluation.

Why Soil Data Matters

A crack does not automatically mean a home needs piers. The Foundation Risk Registry explains Plasticity Index (PI) and related USDA/NRCS soil-survey values so homeowners can place visible symptoms in context before requesting an evaluation or comparing repair proposals.

The Active Zone Phenomenon

Some fine-grained soils change volume as moisture conditions change. The depth affected by seasonal variation is often called the active zone, but its depth cannot be selected from a city map. Repair design should reflect site conditions, loads, and measured movement.

Engineering vs. Sales

Transparent soil context helps homeowners ask why a repair is recommended, how the affected area was measured, and whether drainage or plumbing is contributing. Those questions make competing proposals easier to compare without assuming that map data supplies the diagnosis.

Higher-plasticity soil can be more sensitive to moisture change, but map data does not establish whether a particular foundation is moving. Repair decisions should be tied to property measurements, observed progression, and the likely cause.
Foundation Risk Registry research guidance