CEMENT-SAND TILES WERE DEVELOPED in the 19TH Century As An Alternative to A More Expensive Ceramic Roof. A Few Simplified Technology of Its Production Made It Possible to Reduce the Cost Without Influencing the Quality. The Advantages of Cement-Sand Tiles the Following Characteristics: Environmental FriendLance, Low Thermal Conductivity, Excellent Sound Insulation, Water Resistance, Durabilit Y, High Resistance to Aggressive Media and Ultraviolet Radiation, The Absence of Static Electricity Accumulation, Resistance to Tempertures, Excellent Appe, there is no Need Departure Douring Operation.