Littleton Walkway Contractors

Most failed front walks around here never cracked from traffic. They tilted. A panel dropped a half inch over a wet winter, the joint pulled open, water got in, and the next February pried it wider. That story happens below the concrete, in six or eight inches of dirt, and it starts with water somebody pointed at the walk years ago. A downspout. A sprinkler head. A yard falling the wrong way.

So the trench gets our attention. Go Denver Concrete is licensed, bonded, and insured, with a structural engineer on staff. On a path job the most valuable hour comes before anyone orders concrete: the one with a shovel, a compactor, and a hard look at where your water ends up. Handle the ground and the walk stays boring for twenty years. Boring is the objective.

The first eight inches decide the next twenty years

We strip topsoil, roots, and anything spongy until the shovel stops sinking. What shows up next depends on your side of town. On the flats near the historic core and through Columbine it's tight clay that holds water like a bowl. Push west into Ken Caryl and the ground turns coarse and rocky, with cobble big enough to argue with. Southbridge hands us both in one trench.

The recipe barely changes. Soft pockets get dug deeper and filled with road base instead of hope. Then four to six inches of aggregate, damp, placed in two lifts, each one run over with a plate compactor. Two lifts, not one. Dump it all at once and the gravel packs on top while the bottom stays fluffy, and that fluffy layer is what drops a panel three winters later.

Where the water under a walk comes from

Width, fall, and how a skinny slab behaves

Thirty-six inches is the narrowest walk we'll build, and we don't recommend it. Forty-eight lets two people reach the door side by side and lets you carry a basket without walking the edge. Wide also fights heave. A ribbon that skinny carries almost no mass and a lot of edge, so it lifts in a winter that leaves the driveway beside it untouched.

Fall matters as much as width. About a quarter inch of drop per foot, running across the walk toward the lawn, moves water off before it freezes in place. Joints go in tight, spaced near the width of the slab, sawed the same day. Through a curve they run out from the center of the radius so the crack has an honest place to go. Four inches thick, 4,000 PSI air-entrained mix, steel where the walk ties into a porch. Builder paths in Highland Walk and The Hills at Piney Creek often came in thin and jointed wide, which is why those crack mid-panel.

What goes in under a Littleton walk

• Topsoil, roots, and old sand bedding stripped to firm ground
• Soft clay pockets over-excavated, replaced with compacted road base
• Aggregate in two lifts, moisture conditioned, plate compacted
• Sleeves for irrigation or downspout lines while we're open
• Grade shot with a laser, fall to the lawn and never the house
• Joints sawed the same day, tight spacing, radial through curves
• Old walk hauled off, sod edges cleaned, cure instructions in writing

Rock on the west side, and the months we like

Digging toward the foothills is slower work. The trench hits rock, the crew changes tools, and now and then the right answer is to raise the walk a little and bring base up to it instead of fighting a stone that's been winning since before the subdivision. On slope we also watch what a new ribbon does to water that used to cross that ground freely. Concrete is a dam if you let it be one.

September is our favorite stretch for path work: warm days, cool nights, no afternoon storm racing the finishers. April through October all works, and summer pours start early. Winter walks happen too, with warmed mix water, accelerators that carry no chloride, and blankets over the fresh slab. Frozen subgrade is a hard no. It thaws, it drops, and your walk goes with it.

We pulled a front walk last spring that had an inch of loose sand under it and nothing else. Somebody screeded the sand flat and poured. Held up fine until the first wet fall, then every panel went its own direction.Our crew lead, after the walkthrough