Topic : F_F Number

What does F_F number in concrete finishing mean?

Since the 70’s, concrete finishers have been working with a unit called F-numbers. Basically, it is a measurement of the concrete surface quality. There are two types of these measurements.

The first one is F_L and it means “Floor Levelness”. It is a calculation of the concrete level and it says if there is a slope or if it is plane. The higher the number, the floor is more leveled.

Plate 2000’s products has only an impact on the F_F numbers which means ''Floor Flatness''. Basically, it’s a calculation of the evenness of the concrete surface. This number is affected by the quality of the finishing tools used, but also the time laps between each pass, the quality of the concrete and the talent of the finisher. The higher the F_F number, the flatter the concrete floor.

The F_F numbers are classified this way:

Conventional       FF 25
Good                   FF 38
Flat                      FF 50  
Very flat               FF 75
Superflat             FF 100
Ultraflat               FF 150

As an example, one of our talented concrete finisher succeeded in reaching a F_F number of 154 in a warehouse floor with P2K’s products!