After the removal of a wooden deck, dangerous voids under the brick pavers were revealed in a luxury apartment pool deck, threatening its integrity and safety. The property owner contacted Helicon, a trusted foundation repair company.
Initial Assessment
Subsurface investigation confirmed extensive voiding with no practical access for excavation during occupancy. Demolition/replacement would take weeks, cost tens of thousands, and the pool would need to be closed during peak season.
Proposed Solution
The contractor selected AP Lift 430 for its hydro‑insensitivity, ~15‑minute cure, and ~50 psi compressive strength. This material was ideal for increasing the soil's bearing capacity and restoring the pool to its correct state.
Procedures
- Map the void locations using ground-penetrating radar and probing.
- Establish an injection grid targeting the largest voids first.
- Drill strategic injection ports through pavers to void spaces.
- Inject AP Lift 430 to refusal using calibrated pressure monitoring.
- Allow 15-minute cure
- Seal injection ports and restore surface aesthetics.
Results
- Structural integrity fully restored with 1,200 lbs of AP Lift 430, filling all voids.
- Zero operational downtime; pool deck remained accessible throughout repair.
- Approximately 70-90% cost savings compared to demolition/replacement alternatives.
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