The diploma thesis deals with the issue of flame propagation on the surface of combustible materials at different positions of the source. The work describes the basic characteristics of fire, forms of combustion, initiation and flame. The work deals in more detail with the description of flame propagation and the influence of material characteristics and the position of the ignition source on the flame propagation. The results and discussion section presents experiments, standard tests and their results focused on the study of flame propagation. Further described herein are the experimental equipment used and samples of various solid materials for which flame spread was observed in the experiment and standard tests. The annotated results of the published experiments show that the flame propagates the fastest ascending and the slowest descending. The rate of flame propagation is influenced by the characteristics of combustible materials, in particular the production of combustible gases by its thermal decomposition, as well as the amount of oxygen available.