The problem
What we found
The pharmacy in Cascade caught fire and when the fire department came to put it out water ran from the pharmacy downhill under the library causing a void under the concrete slab on grade.
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Soil Stabilization, Chemical Shoring & Permeation Grouting
Cascade Library Slab on Grade Void Fill
Cascade, Idaho Sep 25, 2026
Download project slidesThe solution
How we repaired it
After determining the area of void under the concrete we used a two-part structural foam to inject and fill the void and stabilize the concrete to make sure it stays strong.
Explore Soil Stabilization, Chemical Shoring & Permeation Grouting →The result
What changed
The goal was not to lift the concrete but to fill the void. We use special measuring instruments to monitor pressure under the concrete during the void fill process so as to not lift the concrete but only to pressurize the voids.
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