Flood-Damaged Foundations Restored in a Single Day
- Kingsgrove, Sydney, NSW
The Brief
After spending several months interstate, the homeowner returned to his Kingsgrove property to find an alarming situation—the lower section of the rear of his home had shifted significantly. Small cracks that had gone unnoticed for years had worsened into large, jagged fractures. The sudden and dramatic damage left him shocked and unsure of what to do next.
The culprit was a flood caused by surface water flowing down the driveway during heavy rain. The water settled at the lowest point of the property, where blocked drainage allowed it to pool and seep into the soil, eroding the foundation. On the verge of hiring builders to demolish and rebuild the damaged walls—a costly and time-consuming process—he reached out to a family friend for advice. That friend recommended Buildfix, having experienced our innovative solutions firsthand. Hoping for a better alternative, he decided to give us a call.



The Challenge
When Buildfix arrived to assess the property, it was immediately clear the situation was critical. The wall on the western elevation was under immense stress. A large zig-zag crack ran halfway down the wall, accompanied by smaller cracks spreading toward the bottom corner. Most concerning of all, the wall had shifted outward at the corner halfway up, creating a visible and alarming step-out.
The flooding had destabilised the foundation, causing subsidence and a significant structural shift. The homeowner feared his house could collapse at any moment. He needed the foundation stabilised, the wall realigned, and the property made safe as quickly as possible.

Our Solution
To address the complex damage, Buildfix implemented a meticulous, multi-step approach. First, our team set up props to apply controlled lateral force to the wall, preparing it for realignment.
Next, we tackled the foundation issues by using our advanced GeoPoly™ resin technology. We injected the resin deep below the wall to fill voids created by the flood’s surface water erosion. Once stabilised, we injected the resin a further two metres below to create a solid, load-bearing base for the structure.
As the resin expanded and raised the wall by 20mm, our technicians carefully maintained lateral pressure, forcing the wall back into alignment. This precise method ensured the foundation was stabilised and the brickwork was perfectly realigned, restoring the structural integrity of the home.

The Outcome
The results were extraordinary. Buildfix not only stabilised the sinking foundation but also raised the structure and realigned the wall with millimetre precision, making the damage almost invisible.
The entire process was completed in just one day, allowing the homeowner to move back into his home far sooner than he imagined. He was overjoyed with the result and couldn’t believe how seamless the process was compared to the costly and disruptive rebuild he had initially considered.
“I feel so fortunate I found Buildfix,” he said. “You’ve saved me months of stress and thousands of dollars. It’s like the problem was never there.”
At Buildfix, there’s nothing more rewarding than restoring not just a home, but a homeowner’s peace of mind.
