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Concrete & Masonryaka: fresnoaka: float

Bull Float

In Plain English

A wide, long-handled tool used to smooth freshly poured concrete right after it's leveled, while the mix is still wet.

Definition

A large, flat, rectangular tool on a long handle used to smooth and level freshly poured concrete flatwork immediately after screeding, prior to final finishing. Bull floating closes surface voids, embeds large aggregates slightly below the surface, and produces a relatively flat, open surface for subsequent floating and troweling. It is typically made from aluminum or magnesium.

Why It Matters in Bidding

Bull floating is a timing-critical step in concrete flatwork, and the window between screeding and floating affects crew sizing and labor cost in a concrete bid. While the tool itself is minor, an estimator pricing large slab pours must staff enough finishers to bull float the full area before the concrete sets, especially in hot weather.

Example

When bidding a 10,000-square-foot warehouse slab, the concrete estimator sizes the finishing crew so the placed concrete can be screeded and bull floated within the working window before the surface stiffens in summer heat.

Related Terms

Frequently Asked Questions

Bull floating must happen in a narrow window after screeding and before the surface stiffens, so the slab size dictates crew count. Underestimating finishers on a large pour can cause part of the slab to set unworked, leading to defects, rework, and lost margin.
Rarely as a standalone item; the tool cost is negligible and folded into finishing labor and small tools or general conditions. What estimators actually price is the finishing labor crew and its productivity rate per square foot, of which bull floating is one sequenced step.
Heat, wind, and low humidity shorten the working time, forcing larger or faster crews to bull float before the surface crusts. Cold slows set and extends the window. Estimators planning seasonal pours adjust crew productivity and may price evaporation retarders or hot-weather measures accordingly.

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