Stabilize Subsurface Voids Fast
Voids beneath critical infrastructure are silent threats—often undetected until damage is visible. These gaps can form from erosion, washout, or long-term settlement and must be addressed before structural failure occurs. Our void filling solution targets these hidden gaps using precise, expanding structural materials that reestablish contact between foundations and the soil below.
What Is Void Filling?
Void filling is the process of injecting high-density structural materials into subsurface gaps beneath infrastructure. These voids often form due to soil erosion, water infiltration, or degradation of fill material. Left untreated, they compromise support systems and increase the risk of collapse or settlement.
This solution restores subgrade continuity without excavation, making it ideal for treatment beneath roads, bridges, culverts, utility structures, and industrial slabs.
Where Might Void Filling Be Needed?
- Beneath roadways and highways
- Around manholes and utility vaults
- Under bridge abutments or footings
- Below culverts and storm drains
- Adjacent to retaining walls
- Under building additions
- Near tanks, silos, or equipment pads
- Around piers and columns
We Recommend Void Filling If You See:
- Surface depressions or sinkholes
- Voids visible during camera inspection
- Pavement cracking or deflection
- Water pooling around structures
- Unstable manholes or vaults
- Exposed utility lines or conduits
- Seepage along foundations
- Erosion near drainage systems
- Recurring structural movement
Is Void Filling Really Needed?
Yes—voids pose immediate and long-term threats to critical structures. Even if surface symptoms are minimal, the lack of soil contact can lead to catastrophic failure when loads shift, water infiltrates, or vibration occurs.
Void filling provides a fast, non-invasive fix that restores support, seals off infiltration paths, and mitigates further soil loss before deeper damage sets in.
What Are the Advantages of Void Filling?
Void filling provides measurable benefits across commercial, industrial, and municipal applications.
Prevents Structural Failure: Restores subgrade support to prevent collapse or settlement.
Non-Disruptive Installation: Completed without removing slabs or interrupting operations.
Seals Water Pathways: Reduces infiltration that causes erosion and instability.
Fast Cure, Minimal Downtime: Structures can often be returned to service within hours.
Versatile Application: Used beneath concrete, asphalt, or gravel across many industries.
Common Problem Areas
- Roadway subgrades
- Manholes and access vaults
- Bridge and culvert approaches
- Industrial foundations
- Utility trenches
- Retaining wall bases
Secure Your Structures with Groundworks’ Reliable Void-Filling Solutions.
How Does Void Filling Work?
Void filling uses precise injection to fill and stabilize hidden gaps beneath infrastructure.
- Site inspection and mapping of suspected voids
- Non-destructive testing or camera inspection (if needed)
- Marking injection grid
- Small-diameter port drilling
- Delivery of structural polyurethane into void spaces
- Material expansion fills gaps and compacts adjacent soils
- Surface movement monitored for lift or sealing
- Port removal and surface restoration
- Final inspection with reporting and confirmation
Why This Is the Best Choice
- Avoids full excavation or teardown
- Compatible with active infrastructure
- Works in wet, sandy, or granular soils
- Reduces infiltration and erosion
- Scalable from small voids to large undercuts
- Short installation time
- Suitable for emergency repair
- Proven across public and private sectors
Contact Groundworks for Void Filling
Void Filling for Critical Infrastructure
If your project involves aging infrastructure, unstable soil conditions, or known erosion risks, Groundworks offers the precision and speed to keep things moving. Our void filling service seals hidden threats before they cause major damage. Schedule your inspection today and protect your structure from below.
Names You Know Trust Groundworks with Their Toughest Foundation Issues
We want to learn about your project.
FAQs
Camera inspection, ground-penetrating radar, or surface movement often reveals void locations.
No. Injection is performed through small ports drilled directly into the surface.
Yes. Once injected, the material remains stable, inert, and water-resistant.
Yes. Our process is highly controlled to avoid disturbing utility lines or conduits.
Bridges, roads, vaults, retaining walls, tanks, foundations, and more.
Disclaimer / Terminology
Void: An empty space beneath a structure due to erosion, settlement, or washout.
Void Filling: Process of injecting materials into voids to restore soil contact and support.
Structural Polyurethane: Expanding resin used to fill gaps and compact surrounding soil.
Infiltration: Groundwater or surface water entering subgrade soils and causing erosion.
Subgrade: The soil layer beneath a structure or pavement.