Aurora Slab-on-Grade Contractors

Nobody hires a concrete crew for the part of a slab that decides its life. You want a floor: flat, clean, ready for a vehicle or a workbench. What you're buying is everything below it. Proven dirt. Base placed in shallow lifts and compacted through. Clean angular rock. A sheet of plastic that crews still argue about. Then, last and least interesting, four or more inches of concrete.

Aurora makes that under-slab work matter more than it would somewhere flatter and more uniform. The city covers a lot of ground and the dirt doesn't stay the same across it. A shop floor near Murphy Creek and a garage slab out toward Saddle Rock can want different assemblies underneath, and the way to find out is to open it up and look.

What happens between demolition and the first truck

• Old floor saw-cut, broken out, and hauled off, with dust control on interior work
• Subgrade proof-rolled once exposed, so soft areas get found rather than covered
• Soft or organic material dug out and replaced with something that compacts
• Old utility trenches located, since a ditch backfilled loose is a settlement line waiting to happen
• New conduit, drains, and rough plumbing set, tested, and protected before base goes over them
• Base in shallow lifts, each one compacted, then screeded so slab thickness stays honest
• Capillary break of clean rock, then vapor retarder lapped, taped, and sealed at penetrations
• Steel on chairs and tied, layout matched to the loads you described

Proof-rolling: the ten minutes that decide the next thirty years

Once the old floor is gone we run weight across the exposed dirt and watch what it does. Ground that pumps, springs, or ruts under a loaded machine is telling you it won't hold a slab no matter how much rock goes on top. That's the moment to spend money. Digging out a soft pocket costs a few hours. Finding it later means the floor cracked and stepped, and the tool for that is a jackhammer.

Compaction can't be faked either. Base dumped in one deep pile and rolled across the top stays loose underneath, and loose base is a slower version of bad dirt. Shallow lifts, every one run. Moisture counts as much as effort: too dry and it won't lock together, too wet and it moves around under the plate.

Then the retarder argument. Plenty of crews skip the plastic under a garage and shrug. Concrete isn't waterproof. It's a strong sponge that passes whatever the ground offers straight up into your epoxy, your flooring adhesive, or the boxes stacked on it. Anything heated, coated, floored, or lived on gets one from us.

What we find when the old floor comes off

Thickened edges, and the seasons that suit this work

A floor spreads load. A wall collects it into a line, and a uniform slab under a bearing wall dishes and cracks every time. Wherever a wall, a post, a lift, or a masonry run lands, we drop a thickened section poured monolithically with the slab, detailed off the framing plan. Same thinking at overhead door openings, where a slab most wants to crack.

Interior slabs hand us a scheduling advantage nothing else does. A garage that closes, a basement, a shop with walls and a roof: heat the space, thaw the ground, and January pours like June. Access becomes the only real limit, since a pump line still has to reach inside.

Exterior slabs follow the Front Range calendar. Summer means early starts and an eye on the western sky, because a hard cell during finishing beats water into fresh paste and the bill arrives later as scaling. Fall is the best stretch of the year. Winter needs warm water, blankets, and unfrozen ground. Whatever month it goes in, keep salt off it the first winter. Shovel, sweep, sand for grip.