In this master thesis, we focus on composite materials and building materials in general, and their categorisation by composition, properties, application, and fire safety. The experiment chapter is focused on measuring the fire safety of chosen materials with similar application: wood plastic composite panel WPC and aluminium composite panel ACP. The experiment is focused on comparing these two materials by their ignitability, mass loss rate and duration of ignition, as valuable fire safety characteristics. For this purpose, we proposed the experimental methods of radiation heat source test (a non-standard method) and an ignitability test (a standardised method). By evaluating WPC and ACP boards by an ignitability test (STN EN ISO 11925-2) we reached the conclusion that both materials meet at least one of the criteria to classify them as class B by reaction to fire.