You pay for pounds of resin, not square feet of slab, and on graded ground the light weight is the whole reason to pay it.
Polyurethane costs more per lift than a bucket of slurry. Nobody argues that. What people want to know is where the extra goes and whether they're getting anything for it, which is a fair question and one most quotes answer badly.
Short version: you're buying weight you don't add, holes you barely see, and a slab back in service the same hour. On a lot of Arvada properties, especially the newer ones west of town, the first of those three is worth more than the other two combined.
It arrives as two liquids in separate drums, warm, and it does nothing until the gun combines them. Then it reacts with itself. Not with air, not with moisture, not with the temperature of your driveway, which is why we can inject in February and why a wet void doesn't ruin the job. The mixture expands, finds the gaps, presses against the soil until the soil pushes back, and then it starts pushing the slab.
That reaction is over in minutes. Closed-cell foam doesn't take on water, doesn't wash out, and doesn't lose volume over the years, so what you get on the day is what you keep. It's also the reason we watch the slab with a laser instead of a stopwatch. Material goes in slowly, in small shots, and the second the panel breaks free we back off. Lifting concrete is easy. Stopping at the right elevation is the skill.
Candelas, Leyden Rock, and Whisper Creek were built on ground that got rearranged first. Hills cut down, low spots brought up, everything shaped and compacted in lifts before the first footing went in. Done properly it performs fine for decades. Done thin in one corner of one lot, it keeps compressing under its own weight for years, and the flatwork above it goes along for the ride.
Now think about what a heavy slurry does to that situation. You're putting hundreds of pounds of wet sand and cement onto soil whose entire problem is that it can't carry what's already on it. It works, briefly. Then the fill takes the new load the same way it took the old one. Polyurethane weighs a small fraction of that, so the lift doesn't come with a bill attached to it later.
Closer to Olde Town the calculus flips. Thick old concrete on native ground with a water-carved cavity underneath is textbook slurry work, and we'll tell you so rather than sell you resin you don't need.
| What you do | What it solves | What it leaves on the table |
|---|---|---|
| Nothing, for another year or two | Costs you nothing today | The cavity keeps growing, the trip hazard stays, and water keeps running to the low corner |
| Grind the lip or shim the step | Removes the immediate hazard for very little | The slab is still unsupported and still dropping; you've filed down a symptom |
| Inject polyurethane | Restores support and grade in an afternoon, adds almost no load | Doesn't repair a broken surface and doesn't fix your drainage |
| Tear out and repour | New concrete, new base, new joints, thirty-year answer | Costs the most, ties up the area for a week, and is overkill on sound concrete |
Measure the drop at its worst point, count the panels, and call it in. We'll tell you what drives your quote. (303) 569-4046.
Most concrete work here lives inside a weather window. This one mostly doesn't. The chemistry brings its own heat, the drums stay warm in the truck, and a January driveway lifts about as well as a June one. We'd rather you not wait, because a cavity under a slab is a place for meltwater to collect, freeze, and pry.
Two things do stop us. Snow and ice on the surface have to come off before we can read grade or set a port, so a storm can bump a morning. And frozen soil won't compress or accept material the way thawed soil does, which occasionally means holding a job until an afternoon thaw. Spring is our busiest stretch anyway. Runoff opens up every void in town and people notice their walks right when the grass greens up.
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.
Accessibility
Adjust the site to fit how you read and browse. Your choices are saved on this device.