Void Filling in Northern Colorado

Yes. If the slab is still level, filling voids restores support and can prevent future settlement.

Mudjacking uses a heavy slurry to fill space. We use lightweight polyurethane foam. The foam expands to fill small voids and adds less weight to weak soil.

When installed properly and drainage issues are addressed, void filling provides long-term stabilization.

That depends on whether the slab has already settled. We assess your concrete and give you a clear recommendation during your estimate.

One common sign is a hollow sound when you tap on the slab. You may also notice soil washing out along edges, gaps forming underneath, or small cracks starting to appear. In some cases, water drains under the slab instead of away from it.

If you are unsure, we can inspect the slab during your estimate and determine whether stabilization alone is enough or if lifting is also needed. You can learn more about how we assess slabs on our concrete leveling Process page

Yes, in many cases it can. If the slab is still level and structurally sound, filling the empty space underneath restores support and helps prevent settlement before it starts.

However, if the slab has already sunk, we may combine void filling with lifting. If you are already seeing uneven areas.

Water is the main cause. Poor drainage, heavy rain, downspouts discharging near slabs, irrigation overspray, and freeze-thaw cycles all contribute to erosion.

Over time, that erosion creates empty pockets beneath the concrete. Filling those voids and correcting drainage issues helps protect the slab long term.

Void filling stabilizes the slab and prevents additional movement. While it does not remove existing cracks, it helps stop further cracking caused by soil movement.

If your slab is both cracked and uneven, you may also benefit from concrete repair to address surface damage along with stabilization.

Yes. The polyurethane foam used for void filling expands and hardens beneath the slab, creating stable support. It is designed for structural soil stabilization and works for both residential and commercial concrete surfaces.

If you are unsure whether your slab qualifies, we can evaluate it during a free estimate.

Yes. We provide void filling for residential and commercial slabs, including sidewalks, parking areas, warehouse floors, and building entrances.

If your business has uneven concrete or hollow spots forming, you can also learn more about our commercial concrete lifting services.

Most residential void filling projects are completed in just a few hours. The foam cures quickly, so the slab is typically ready for use the same day.

Unlike full replacement, there is no demolition and no waiting days for concrete to cure.