Voids beneath slabs or foundations can develop from erosion, poor compaction, or soil movement. These empty spaces reduce support and can lead to cracking or settlement if left untreated.
Structural Systems applies controlled void filling techniques to restore contact between your foundation and the supporting ground.
Subsurface voids weaken the performance of your foundation by removing the support it depends on. As these gaps expand, they can cause uneven settlement, slab deflection, and structural stress. Void filling is a precise process that injects engineered materials into empty spaces beneath the foundation. This restores uniform support, improves load distribution, and helps prevent further deterioration.
Depending on site conditions, void filling may be used as a standalone solution or combined with other foundation stabilization methods such as compaction grouting or underpinning systems.
Evaluate the structure, site
conditions, and visible concerns.
Identify the underlying
soil or structural cause issues.
Develop a safe, reliable,
site-specific solution design.
Restore stability, integrity,
and long-term performance.
Voids can develop from erosion, poor soil compaction during construction, or natural
soil movement over time. In Hawai‘i, heavy rainfall often accelerates this process by
washing away supporting soils beneath slabs and foundations.
Common signs include cracks in floors or walls, uneven or sinking slabs, and hollow-
sounding areas when walking on concrete. A professional assessment can confirm
the presence and extent of subsurface voids.
Void filling injects engineered materials beneath the foundation to fill empty spaces
and restore contact with the supporting soil. This stabilizes the structure, improves
load distribution, and helps prevent further settlement or damage.