Basement floors move slowly enough that most Broomfield homeowners find the problem by accident. A marble rolls across the rec room. Vinyl plank telegraphs a hump that wasn't there when it went down. The washer starts walking during spin cycle. By the time a settled basement slab announces itself, it's usually been sinking for years, and the good news is that the fix doesn't involve a jackhammer or a dumpster in your driveway.
How dry wind above reaches a slab below grade
At 5,420 feet, on a corridor known for wind, Broomfield's clay gets moisture pulled out of it hard every summer. That drying doesn't stop at the surface. Over years and decades the moisture cycling works deeper, and the clay under a basement slab, placed there as backfill during construction, gives up volume the same way the yard soil does. The slab settles into the space the clay surrendered. Freeze-thaw and spring melt then push water down along the foundation walls, which is why so many of the basement floors we lift are low along the perimeter and near the sump corner.
Floor problem or foundation problem? We check first.
Before we quote a basement lift we look for signs the walls are moving: stair-step cracks at wall corners, doors upstairs that stopped latching, windows racking out of square. If we see them, we tell you to bring in a structural engineer before anyone pumps anything, because lifting a slab under a moving foundation hides the real problem. Most of the time the walls are fine and the floor simply lost its base. That one we fix.
The distinction matters because a basement slab in most Front Range homes floats free of the footings. It can drop an inch while the structure above stays perfectly sound. Scary to look at, routine to repair, and no reason to let a contractor talk you into piers you don't need.
What Broomfield's basements have in common, and what they don't
The housing stock here spans 1960s Broomfield Heights to 2000s Anthem, so we work in everything from unfinished 60s basements with the original slab to newer homes finished wall to wall. The method suits both. We drill 1-1/2" holes through the slab, one every 4 to 6 feet across the low area, and pump a slurry of water and sandy loam soil that spreads, fills the void, and floats the slab back up. In finished spaces we tarp and protect everything first, keep the holes away from finished perimeter walls where possible, and patch flush when done. Carpet, tile, or epoxy can go right over the patches later. There's no rubble, no dumpster, and no week of dust migrating upstairs, which is the part of a slab replacement nobody warns you about.
The price of lifting versus everything else
Basement floor lifts are priced by lift area and void volume, quoted free and in person. Compare that to slab replacement, which means demolition inside your house and rubble carried up the stairs, or underpinning, which starts around five figures. Worth knowing before you decide:
- The slurry is inert once cured. No foam chemistry, no solvents, nothing off-gassing under your living space.
- How long we need depends on access; Trevor covers that at the estimate.
- Mudjacking is not waterproofing. If water is coming in, that needs its own fix, and pooling along a low perimeter is often the clue that led you to us in the first place.
A low floor that collects water also invites the kind of damage we wrote about in our piece on uneven concrete and water damage. Sooner is cheaper.
Get eyes on it before you plan around it
If you're about to re-carpet, finish the basement, or list the house, have the slab checked first. A lift costs a fraction of the flooring it protects, and inspectors flag sloped basement floors on resale walkthroughs all the time. Trevor does every estimate in person, measures the settlement with a level rather than a guess, and separates floor problems from foundation problems for free. Call (303) 526-2222 and we'll tell you exactly what you're standing on.