Pencil-sized ports, two-part polyurethane, and a patio you're eating dinner on the same evening.
Think about how you actually use the concrete that's gone crooked. The garage apron gets crossed twice a day, in the dark, usually with an armload of something. The back patio holds a table, a grill, and whatever the kids left out. The walk between the driveway and the front door is where every delivery driver and every grandparent puts a foot down. None of that pauses for a month while concrete cures.
Foam leveling is built around that reality. We drill ports the width of a pencil, inject a two-part polyurethane that expands and pushes the slab back to grade, and the material reaches its working strength in about the time it takes to fill the holes. Furniture goes back the same afternoon. Cars go back the same afternoon. Most people are surprised how little of their day it takes.
Start with the obvious one. Nobody catches a toe on the walk anymore. That lip at the joint, the one that grabs a stroller wheel and dumps rainwater into a puddle that never dries, is gone by lunch. Then there's the quieter set of wins. Your garage door seals against the apron again instead of leaving a gap that pulls leaves and snowmelt inside. Patio furniture sits flat, so the table stops rocking every time somebody leans on it. The gate that had started to drag clears its swing.
Because the ports are small and the material sets fast, the disruption is measured in hours. We're not building forms in your yard. We're not blocking the driveway with a machine for two days. A crew shows up, works a hose in from wherever the truck can park, and leaves you with a slab you can immediately stand on. That matters most on the pieces of concrete you can't live without: the only path to the front door, the only way the car gets in.
And it matters on decorative work. Stamped and stained surfaces are expensive to replace and nearly impossible to match. A pencil-sized port patched into a stamped pattern disappears in a way a tear-out never could.
Foam lifts finish in hours, not weeks. Tell us which slab is in your way and we'll come measure the drop for free.
| Spec | Polyurethane foam | Cement slurry |
|---|---|---|
| Injection hole | Roughly five eighths of an inch, about a pencil | Closer to an inch and a half |
| Load added to the soil | A few pounds per cubic foot | Close to the weight of the concrete sitting above it |
| Time to working strength | Minutes | Hours, and longer when it's cool |
| Behavior around water | Closed cell, so it doesn't soften or wash out | Solid once cured, but it wants unfrozen ground to place |
| Best fit | Slabs over engineered fill, decorative surfaces, tight access, shoulder-season work | Broad shallow voids under plain flatwork where added weight is a non-issue |
| Where it gives ground | Costs more per hole | Puts new dead load on soil that may already be tired |
Newer parts of town matter here. Subdivisions like Idyllwilde and Reata went in on graded pads with engineered fill under a good share of the flatwork, and fill compacts on its own schedule no matter how well it was placed. When a walk over that fill drops a half inch, the last thing you want to do is set a heavy pad of grout on top of the same material. Light fill under a light lift is the better answer. Stonegate gets its share too, mostly aprons and front walks sitting over old utility trenches.
The season runs longer for foam than it does for a slurry lift. The reaction generates its own heat and doesn't care much about a cool morning, so we keep injecting into late fall and pick up again early in spring. Frozen ground still stops us, because a slab locked in frost will not move evenly and forcing it is how you crack concrete. Fall is the smart booking either way. Get the joint closed before the first freeze and you keep meltwater from sitting in it all winter, freezing overnight, and prying the gap a little wider at an elevation where that cycle repeats dozens of times a season. Rain barely factors in either, since the material cures under the slab and shrugs off moisture.
Still unsure about something?
Call the crew at (303) 569-4046 and we will talk it through.
Get a free, no-obligation estimate from a crew that knows Colorado soil, Colorado weather, and how to finish concrete that lasts.
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