The puddle at the back door started under the patio
Most patio calls we get in Highlands Ranch begin the same way. Rain or snowmelt is pooling against the house instead of running off the slab, or the step down from the back door has gotten noticeably taller. Both are symptoms of one thing: the patio has settled, usually tilting back toward the foundation, and now it's directing water exactly where you don't want it.
That tilt matters more here than it would in a wetter climate, because Douglas County clay reacts to every drop. Water held against the foundation feeds the bentonite in the soil, the clay swells, and a patio problem starts auditioning to become a foundation problem. Lifting the slab so it drains away from the house again is cheap insurance against a much worse conversation.
Wind is the underrated patio killer up here
Highlands Ranch sits high and open, and the wind works on backyards all year. In summer it strips moisture out of the top layers of clay faster than it does on the sheltered, tree-heavy lots in older parts of the metro. Bentonite that dries, shrinks. Shrinking clay drops away from the underside of the patio, the corners lose support first, and the slab starts leaning into the gap. Then a wet fall swells the soil back unevenly, and the patio ends up sitting crooked on ground that keeps changing its mind.
The worst stretch for patios here is really two stretches: late summer, when wind-dried clay has shrunk its furthest, and early spring, when chinook thaws send melt under a slab that refreezes by midnight. Both leave patios lower than they were the year before.
Builder-grade patios on a builder's timeline
Most housing here went up between the 1980s and 2000s, dense and quick. Patios in those neighborhoods were commonly poured on backfill that had only months to settle before the concrete went down. Decades later, that backfill has finished compacting and the patio has followed it down, most often at the corner nearest a downspout. If your subdivision was built in the same wave, the patios around you are running the same experiment on the same soil.
What it costs to put the slab back
A patio lift lands around a fraction of replacement cost, quoted free and in person. Trevor will tell you at the estimate when you can walk on the patio. Stamped and colored patios lift the same way; the 1-1/2" holes get patched flush.
Where we draw the line: a patio in many small pieces doesn't lift well. Pieces rise unevenly, joints open, and you'd be paying for a repair that won't hold, so we'll tell you to replace it instead. Most patios we see here haven't reached that point. A quick guide to where yours stands:
- Settled but still in big, sound pieces: prime lifting territory
- Tilting toward the house: lift it before the foundation pays for it
- Two or three large pieces: usually liftable back to one plane
- Many small pieces: we'll be straight with you, that's a replacement
One visit, and the drainage talk
We drill, pump, bring the slab up to grade, and patch. Before we leave, we'll show you where the water that sank the patio came from, because if a downspout keeps dumping at the slab edge, no lift will outrun it. Solve the drainage and the lift lasts.
Timing is flexible, too. We pump year-round in Highlands Ranch, cold weather included, because the slurry cures fine in winter. The only thing that pauses us is ground frozen too hard to drill a clean hole, and up here that usually costs a day or two of waiting, not weeks.
Trevor does every estimate himself, in person, at no charge. If the back patio has started collecting water or leaning where it shouldn't, request a free estimate or call (303) 526-2222. You can read more about the method on our main patio leveling page.