What are foundation conditions like in Ardmore, Oklahoma?

Reviewed by Preston · Updated 2026-11-12

In short: About 39% of Ardmore is mapped in soils rated high shrink-swell and 20% moderate ¹. Which of these a house sits on decides whether clay swell, water, rock or soft ground is the thing to watch.

What does the soil survey show for Ardmore?

Ardmore covers about 50 square miles ² and had 24,725 people in the 2020 Census ².

Which soils matter most for houses in Ardmore?

• Windthorst, about 14% of the area ¹: Very deep, moderately well drained, moderately slowly permeable soils that formed in sandy and clayey residuum weathered from claystone and sandstone of Cretaceous age ³.
• Normangee, about 14% of the area ¹: Soils that are deep to weakly consolidated shale ⁴.
• Durant, about 10% of the area ¹: Very deep, moderately well drained, very slowly permeable soils that formed in clayey residuum weathered from clayey deposits and shales of Cretaceous age ⁵.
• Weatherford, about 10% of the area ¹: Deep, well drained, moderately permeable soils that formed in sandy and loamy residuum weathered from sandstone and siltstone of Cretaceous age ⁶.
• Steedman, about 7% of the area ¹: Moderately deep, well drained or moderately well drained, slowly permeable soils that formed in material weathered from shale containing thin strata of sandstone of Pennsylvanian age ⁷.
• Water, about 4%, is open water ¹.

What does this mean for houses in Ardmore?

Clay that swells and shrinks. Where high shrink-swell soil sits under a house, wet spells lift the slab edges and drought drops them, and uneven watering does more harm than uniform change. See perimeter wetting heave, edge drop in drought and tree-root drying.

Flood-prone soils. Floodplain soils are layered stream deposits: softer, wetter and more variable than upland soils, and they flood. See soft soil consolidation and Quaternary alluvium and terraces.

Which soils cover Ardmore?

Looking for a foundation company near Ardmore?

Companies that serve Ardmore can appear on the company map in the Homeowner Hub. Paid listings there are marked Sponsored; the library and the AI guide don't rank or recommend any of them.

Buying or selling a house in Ardmore? Realtors who serve the area can be on the same map, also marked Sponsored, and for realtors covers the seller disclosure form, inspections and the sale timeline. Seeing cracks at home? Start with for homeowners.

How were these numbers measured?

We overlaid the city limits from the Census Bureau ² on the USDA soil survey's map units ¹ and added up the area of each soil. Where a map unit is a mix of soils, its area was split by the percentages the survey lists for its major soils, so shares leave out minor inclusions and do not add to 100%. Shrink-swell is rated by the linear extensibility of a soil's most expansive layer, the survey's measure of how much it changes length between wet and dry (6% or more is high). Water table, bedrock and flooding come from the survey's map-unit summaries: the shallowest water table in any month, the shallowest bedrock, and the most common flooding frequency. Bedrock here includes soft, weathered sandstone and shale that a pier can push through, so it is not the depth where piers stop. These are mapped averages, not a test of any one lot; fill, grading and the soil actually under a house can differ, which is why a site visit or soil boring still decides a repair.

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