Yes, polyurethane foam can be used to stabilize a house foundation, though its application depends on the severity of the settlement and the specific soil conditions.

In many cases, polyurethane foam injection is used for slab stabilization and to fill underground voids, which restores integrity to sunken concrete surfaces like garage floors. It is particularly effective in Denver’s expansive clay soils because the foam is waterproof, lightweight, and resists moisture intrusion.

However, for more significant foundation issues, the following considerations apply:

• Deep Foundation Settlement: In areas with highly expansive clay, such as Centennial, polyurethane foam is often used in combination with helical piers to provide deep structural support.
• Void Filling: The foam expands to fill eroded voids beneath slabs, providing a stable base that resists soil movement and heavy loads.
• Soil Compatibility: This method is recommended for stabilizing slabs in sandy, mixed-gravel, or clay-rich soils common throughout the Front Range.

Because foundation needs vary, a professional on-site inspection is required to determine if polyurethane foam alone is sufficient or if a combination of structural piers is necessary for long-term stability.

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