Void Filling
Concrete Void Filling in Kansas City & Surrounding Areas
Voids beneath concrete slabs are a common but often unseen problem. When soil erodes or washes away, empty spaces form under concrete, leading to sinking, cracking, and structural instability. Olympic Concrete Lifting provides professional concrete void filling services that stabilize the soil beneath slabs and help prevent future settlement — without replacement.
Serving Kansas City, Overland Park, Olathe, Lenexa, Shawnee, Leawood, Lee’s Summit, Liberty, Belton, and surrounding Kansas & Missouri communities
What Is Concrete Void Filling?
Concrete void filling is a soil stabilization process that fills empty spaces beneath concrete slabs. Instead of lifting the concrete, the goal is to support it by injecting material into underground voids to prevent future movement or collapse.
We use high-density polyurethane foam to fill voids, compact loose soil, and restore stability beneath the slab.
Common Signs of Voids Beneath Concrete
Voids can exist even when concrete looks intact. Common warning signs include:
Hollow sounds when walking on concrete
Cracks forming without visible settlement
Sudden sinking or shifting of slabs
Water pooling near concrete edges
Gaps between slabs or adjacent structures
Early void filling can prevent the need for more extensive repairs.
Why Voids Form Under Concrete in the Kansas City Area
Voids beneath concrete typically form due to:
Soil erosion from water runoff or drainage issues
Poor soil compaction during construction
Plumbing or irrigation leaks
Freeze–thaw cycles that loosen soil
Natural soil settlement over time
Once soil washes away, concrete loses the support it needs.
Our Void Filling Process
We use polyurethane foam injection to fill and stabilize voids beneath concrete slabs.
The process includes:
Drilling small, discreet holes into the concrete
Injecting expanding polyurethane foam into void areas
Allowing the foam to fill empty spaces and compact soil
Sealing injection points and verifying stability
Void filling can often be completed quickly with minimal disruption.
Benefits of Concrete Void Filling
Stabilizes soil beneath concrete
Helps prevent future settlement
Protects existing concrete slabs
Minimal disruption to surrounding areas
Fast cure time and same-day use
Long-lasting, moisture-resistant solution
Void filling is often used as a preventative or complementary service alongside concrete lifting.
Void Filling vs. Concrete Lifting
While concrete lifting raises sunken slabs, void filling focuses on stabilizing the soil beneath concrete that hasn’t yet settled significantly.
Void filling is ideal when:
Concrete is stable but hollow underneath
Settlement is likely but hasn’t occurred
Preventative stabilization is needed
Used in combination with lifting for long-term support
We’ll evaluate whether void filling, lifting, or both are needed.
Why Choose Olympic Concrete Lifting?
Expertise in soil stabilization and concrete support
Advanced polyurethane foam technology
Knowledge of Kansas City soil conditions
Honest assessments and tailored solutions
Efficient service with minimal disruption
We focus on addressing problems beneath the surface to protect your concrete long-term.
Frequently Asked Questions (FAQs)
Does void filling lift concrete?
No. Void filling is designed to stabilize and support concrete, not raise it. If lifting is needed, we’ll recommend the appropriate solution.
How long does void filling last?
The polyurethane foam used is designed to last for decades and resist moisture and erosion.
Can void filling prevent future sinking?
Yes. By filling empty spaces and stabilizing soil, void filling helps prevent future settlement.
Is void filling disruptive?
No. The process is minimally invasive and typically completed in a short time.
Can void filling be used with other services?
Yes. Void filling is often used alongside concrete lifting for added long-term stability.
Schedule a Free Void Filling Inspection
If you suspect voids beneath your concrete or want to prevent future settlement, Olympic Concrete Lifting can help. Our void filling services stabilize your concrete and protect your property.
Contact us today to schedule a free inspection and find out if concrete void filling is right for your project.