According to Mr Stanisław Karczmarczyk roof shingles are safe and unfailing even after 50 years of usage. This is possible thanks to appropriate technology and to the fact that in recent years significant changes in the development of wood protective agents have taken place.
Cracow, Poznań, Gdańsk or Warsaw are regions which are especially prone to a fashion for renovation of old houses. The purchase of old houses or country manors involves renovation, but also application of some original changes in order to return them to their former splendour. It follows that there is a demand for products such as roof shingles and for renovation services.