A suitable coating resistance against impact plays an important role in the protection of wood, as in the case of low film resistance against impact the film cracks and thus opens the way for intensive penetration of moisture into the wood substrate. Therefore, we examined the impact resistance of 12 different surface joinery systems of a Slovenian manufacturer. The systems differ from each other in different substrates and coating systems. Results were compared with the already known data on the impact resistance of coating systems for protection of wood in exterior use, intended for wide consumption. The results show that the resistance against impact of selected surface systems for wooden windows depends on a substrate, coating system and finishing. It has been proved that the resistance against impact of a surface system depends on both the substrate as well as on the coating system. We have also found that the impact resistance of selected surface systems of wooden windows is better than the resistance against impact of comparable coating systems intended for general consumption.