What Is Concrete Flatwork?

Residential concrete flatwork includes ground-supported driveways, patios, walkways, garage floors, and equipment pads. The work usually consists of prepared support, formed concrete, planned joints, a specified finish, and curing or protection requirements. The concrete slab guide explains the element itself, while flatwork describes the category of horizontal concrete work. Some projects also include reinforcement, thickened edges, footings, vapor control, embedded items, or engineered details.

Walls, retaining walls, steps, columns, and structural framing may involve different forming, loading, and design questions. They should not be priced as generic flatwork merely because concrete is the material.

Common flatwork projects differ by their loads, dimensions, slope, drainage, finish, transitions, exposure, and connection to nearby structures or equipment.

Residential concrete flatwork is installed by defining the layout and drainage, preparing the supporting ground, setting the forms and specified reinforcement, placing and finishing the concrete, forming or cutting planned joints, and curing and protecting the completed surface.

1. Define the project: Confirm dimensions, elevations, slope, drainage, thickness, edges, transitions, finish, and any approved plans.
2. Prepare the support: Remove unsuitable material, establish the required grade, and prepare and verify the soil and aggregate base for the project conditions.
3. Set forms and project details: Establish the slab boundaries and elevations, then place required embedded items and the specified concrete reinforcement.
4. Place and finish the concrete: Deliver, place, level, consolidate, edge, and texture the concrete using methods appropriate to the specified mixture, weather, layout, and finish.
5. Complete joints and curing: Form or cut the planned joints, apply the specified concrete curing method, and protect the surface until it is ready for its intended use.

The exact sequence, verification, and timing depend on the project and may overlap. A contractor's written scope should identify who is responsible for each stage and how the completed work will be checked.

The flatwork system is defined by its support, geometry, concrete requirements, joints, reinforcement, finish, curing, and protection.

• Support: soil, excavation, aggregate, compaction, soft-area treatment, and drainage.
• Geometry: dimensions, elevations, slope, thickness, edges, footings, and transitions.
• Concrete: strength, exposure, placement limits, and approved mixture requirements.
• Crack planning: contraction, isolation, and construction joints for the actual layout.
• Reinforcement: type, location, support, and intended purpose when required.
• Finish and curing: texture, appearance standard, curing, weather protection, and return-to-service instructions.

One PSI, base depth, or joint spacing does not define every project. Use the subgrade guide and joint guide for those decisions. The written scope should also identify the curing method and weather protections.

A flatwork quote should define the complete work below, within, and around the slab, along with access, protection, approvals, cleanup, warranty, and exclusions.

• Removal, excavation, hauling, disposal, and unexpected conditions
• Subgrade, aggregate and compacted depth, drainage, and verification
• Dimensions, thickness, slope, edges, footings, penetrations, and embedded items
• Concrete requirements, reinforcement, joints, finish, curing, and weather plan
• Access, pumping, site protection, permits, cleanup, warranty, and exclusions