Pavilion Concrete Leveling & Septic Line Rehabilitation

Over the years, the concrete slabs in the downstairs pavilion had gradually shifted, creating elevation differences of up to 1.5 inches between them. After evaluating several possible solutions, the Foundation determined that the best approach was to level the slabs by boring small holes in the concrete and injecting poly foam beneath to carefully raise and stabilize them. This work was completed by Foundation Support of Hawaii.

Prior to the leveling process, the septic lines beneath the slabs were cleaned and lined with an epoxy-saturated tubing to prevent foam intrusion during the concrete work. Given that the original cast iron pipes are over 70 years old, this rehabilitation will also help mitigate future plumbing issues. Commercial Plumbing carried out this portion of the project.

Most of the pavilion slabs were successfully leveled, with one exception. The section with the most significant elevation difference was not completed. Although work had begun, it was paused out of caution—further foam injection risked shifting the slab near the Playroom sliding doors, potentially rendering them inoperable. After careful evaluation, it was decided to leave this slab as-is to avoid potential damage to surrounding areas.

Though not a visually dramatic upgrade, this was a critical and complex project that required nearly two weeks of closure. We’re pleased to report its (mostly!) successful completion and are confident it will help mitigate future issues.