The owner of a home in Montana contacted Yellowstone Structural, a geotechnical specialty contractor, about a distressing issue: one side of their house was starting to settle into the soil. This 1970s-era home did not have the proper drainage systems in place, allowing rainwater to accumulate and erode away at the soil underneath. Poor compaction of soil during the construction process was another likely cause of instability. This property owner needed a permanent solution quickly before the exterior, interior, and even the roof of the home were damaged beyond repair.

Powerful Polymer

The contractor chose to perform deep soil stabilization with Alchemy-Spetec’s AP Lift 430. This high-strength structural polymer is ideal for challenging soil compaction and void-fill jobs. AP Lift 430 also meets NSF/ANSI/CAN 61 standards for contact with drinking water, an important quality for any material to be installed around a residential dwelling. 

Painless Procedure

Contractors performing the Deep Lock® soil stabilization process strengthen the soil at all levels with minimal imposition or downtime to the property owner. In this case, the crew installed a pair of injection tubes every three feet along the footing of the house on the side that was beginning to sink. Next, they stabilized the supporting soil with AP Lift 430, injecting the structural polymer to depths of eight feet, and then four feet at each injection point until full compaction was achieved.

Rapid Result

Two technicians completed this job within six hours. They permanently stabilized the soil underneath the sinking side of the house with minimal equipment and no collateral damage to the structure or surrounding property.

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