Underslab / Radon Rock & Gravel

Under-Slab Gravel. Placed Fast. Graded Right.

When time is money and a concrete contractor is waiting, Ground Solutions | Slingers delivers. Our stone slinger trucks quickly and accurately place gravel, sand, roadbase, or aggregate for radon mitigation, post-tension, and concrete slab prep – without driving over vapor barrier, plumbing, or conduit.

About Radon in Colorado

Radon is a naturally occurring radioactive gas found in Colorado soil and well water, formed from the natural breakdown of uranium. It can enter a home or building and accumulate over time, and long-term exposure has been linked to lung cancer. Colorado has some of the highest radon levels in the country, making proper mitigation a critical part of any residential or commercial build.

A properly installed layer of gravel beneath a concrete slab allows radon gas to move freely rather than accumulating under the structure. The gas travels through the gravel layer and exits safely through plumbing specifically installed to vent it away from the building – protecting occupants for the life of the structure. Getting that gravel layer placed correctly, at the right depth and grade, is not a step to cut corners on.

Materials We Place for Under-Slab Applications

  • Radon mitigation rock and gravel
  • Sand and structural fill
  • Roadbase
  • Post-tension prep aggregate
  • Recycled concrete aggregate

Why Stone Slinger Trucks for Under-Slab Work

Traditional aggregate delivery drops material in a pile and requires a skid-steer or hand crew to spread and grade it. That means more equipment on site, more labor hours, more time before the concrete contractor can start. It also means equipment rolling over vapor barrier, plumbing stub-outs, and conduit the exact things that can’t be disturbed.

Ground Solutions stone slinger trucks eliminate all of that and speed up the process! The remote-controlled conveyor arm places up to 90 feet from the truck and places material directly where it needs to go, without the truck moving, and without anything touching the vapor barrier or utility runs beneath it. Material goes in clean, lands accurately, is laser-graded and the site stays protected throughout.

Our Turnkey Gravel Placement Process

SCHOOLS

COMMERCIAL PROPERTY MANAGERS

HOAS

MUNICIPAL PARK DEPARTMENTS

We handle the full scope from start to finish. We purchase the material, deliver it to the job site, place it using our stone slinger, and laser-grade it to spec. Your concrete contractor can start pouring the moment we leave. No skid-steer. No material stockpile. No mess left behind. On smaller residential pours, our over-the-road slinger with a 25–30 ton capacity is in and out with minimal site impact. On larger commercial projects where there is more room to work, we deliver and stockpile material, then deploy our on-site “OS7” slinger for installation. With a loader, stone slinger, and grading crew working together, we can place and grade up to 500 tons per day – approximately 25,000 square feet of finished floor area.