Concrete isn't just poured on the ground. It's a system: a prepped base, a steel grid, and the concrete itself, mixed to spec.
Before any concrete is placed, we strip the topsoil and build a compacted base of road base over a prepped subgrade. On the Front Range that base does real work: it spreads the load, drains water away from under the slab, and gives expansive clay somewhere to move without cracking the concrete. Skipping or shorting the base is the most common reason a slab fails early.
A grid of rebar, tied and set on chairs in the middle third of the slab, ties the pour together and controls where it cracks. Concrete is strong in compression but weak in tension, so the steel carries the tension and a hairline crack stays a hairline instead of spreading. Driveways and structural pads get a heavier grid than a basic patio.
The concrete itself is cement, sand, stone, and water, batched to the strength the job needs and air-entrained for freeze-thaw. After the pour we screed, float, and finish it, cut control joints to guide cracking, and let it cure properly. Mix, finish, and joints are where a slab is won or lost.
See it built for your project:
Most residential slabs and patios are poured 4 inches thick over a compacted base. Driveways that carry vehicles, and pads for heavy loads like an RV or shop, are typically 5 to 6 inches and reinforced. The right thickness depends on the load and the soil, which is why we spec it per job.
Both add tensile strength, but a rebar grid tied on chairs in the middle third of the slab holds its position during the pour and handles bigger loads. Wire mesh is lighter-duty and easy to step flat into the subgrade if it isn't supported. For driveways and structural slabs we reinforce with a rebar grid.
Air-entrained concrete has microscopic air bubbles mixed in that give freezing water room to expand, so the surface doesn't spall and flake through freeze-thaw cycles. On the Front Range it's standard for any exterior flatwork, and a big part of why a slab lasts through Colorado winters.
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