Different weather conditions can wear down the roof structures of buildings in the course of time. Snowy winters place a load on structures and strong winds wear down joints. The rooftop itself is affected by changes in weather: sunshine causes changes and thermal motion, while rain, snowfall and pollution wear the material down. The endurance

Tomorrow, on Saturday, the lights will go out in many households, as well as businesses and office buildings. This will also happen at our company headquarters, where the facade lighting will be turned off for an hour. The reason is Earth Hour, a worldwide environmental event, through which we are expressing our concern about the