Most projects complete in a few days to about a week depending on the void's size and how many injection points the design requires.
Void filling injects grout, typically a low-mobility compaction grout or an expanding polyurethane, directly into a confirmed subsurface cavity to displace water and air and restore structural support to the ground above it. Unlike compaction grouting used for general soil densification, void filling targets a specific, already-identified cavity rather than treating a broad zone of loose soil.
Across Orange County, those voids trace back to ongoing dissolution in the Ocala Limestone, often detected during pre-construction geotechnical investigation required for new development in the county's expanding unincorporated growth areas. GSI's Orange County void filling work typically includes:
Most projects complete in a few days to about a week depending on the void's size and how many injection points the design requires.
Cost depends on void size, depth, and grout type, which we confirm with subsurface investigation before providing a fixed-cost proposal.
Void filling addresses a cavity before it has collapsed at the surface. Sinkhole repair addresses a void after the ground above it has already given way.
GSI offers 24/7 emergency response and can mobilize a crew within hours if a void is discovered beneath an occupied structure or active roadway.
We use ground-penetrating radar and test borings to map subsurface cavities, standard practice for pre-construction investigation in the county's known karst zones.
Not always required by code, but it's a common recommendation when geotechnical investigation identifies a cavity that could affect a planned foundation.
Yes, that's its primary purpose. Filling a confirmed cavity before it collapses is generally less disruptive and less costly than repairing a sinkhole after the fact.
A properly engineered void fill restores structural support to the treated area permanently, though nearby untreated karst features can still develop independently over time.
A subsurface void in Orange County's karst limestone stays hidden until it isn't. Call (855) 599-5217 to get an Orange County void filling assessment from a licensed engineer.
