No floor is 100% flat, so
the existence of high and low points is inevitable. Whether they are
problematic or not depends on the difference in elevation between the high and
low points and the frequency with which they occur. The larger and more
frequent they are, the less likely a floor is to meet its flatness
There are a variety of
different reasons for the existence of problematic high and low points in
concrete floors, including:
- Uneven placement of the
- Careless screeding.
- Careless floating.
- Surface defects, such
- Fresh concrete having
too low a slump.
If it has been found that a completed floor doesn’t meet the desired
flatness specification, it is possible to remove high points by grinding,
reducing the differences in elevation across the floor’s surface.