The quality and precision of casted industrial floor is often a dispute between an investor and a contractor. Its geometrical and physical properties divert from values defined by the project and also often do not meet the criteria of National Standards requirements. The aim of this paper is to evaluate the practical use of the Terrestrial Laser Scanning (TLS) in non-destructive testing of selected industrial floors. Our focus is on the geometric flatness evaluation. With TLS technology we assess the surface quality and flatness more precisely, faster and moreover, investigate 100% of area. This may lead to better evaluation of the relative position of investigated areas, points and constructions. However, a further investigation, which would define the methodology for evaluation the geometric tolerance from point clouds is needed.