Void Filling
Underground voids can form beneath buildings and infrastructure due to washout, dissolved materials, collapsed drains, or old mine workings. These voids pose a significant risk of sudden ground collapse. Our void filling service uses controlled injection techniques to safely fill these spaces and prevent further settlement.
Key Benefits
Sub-surface void detection
Controlled injection process
Prevents sudden collapse
Suitable for all void types
Non-destructive method
Rapid completion times
Pros & Cons of Void Filling
Advantages
- Eliminates the risk of sudden, dangerous ground collapse
- Non-destructive — no need to dig up floors, driveways, or gardens
- Can treat voids at depth without surface disruption
- Rapid completion, often within a single day
- Suitable for residential, commercial, and infrastructure applications
Considerations
- •Requires specialist survey equipment to locate voids accurately
- •Very large or deep voids may need multiple treatment sessions
- •Not always possible to guarantee 100% fill in irregular cavities
- •Access constraints in tight spaces can limit injection point placement
How It Works
Detection
Ground penetrating radar and other methods to locate and map voids.
Planning
Injection plan designed based on void size, location, and cause.
Filling
Controlled injection of grout or resin to fill the void safely.
Verification
Post-treatment scanning confirms complete void filling.
Frequently Asked Questions
How do voids form under buildings?
There are several common causes. Voids typically form from collapsed or leaking drains washing away soil, dissolved limestone or chalk, old mine workings, or degraded fill materials that compact over time.
How do you detect underground voids?
We use a combination of ground penetrating radar (GPR), dynamic cone penetrometers, and trial pits. These methods allow us to locate, map, and measure voids beneath your property without destructive investigation.
What materials are used for void filling?
It depends on the void size and conditions. We use geopolymer resin for smaller, precision fills, cementitious grout for medium voids, and foamed concrete for larger cavities. Each is chosen for maximum effectiveness.
Is void filling disruptive?
No, the process is minimally invasive. Small injection holes are drilled through the surface and the filling material is pumped in under controlled pressure. There is no excavation and very little mess.
Void Filling Across West Yorkshire
We provide void filling services throughout West Yorkshire. Click a location for local details.
Free Void Filling Quote
No obligation — we respond within 24 hours