Exterior facade designs in construction are generally for the front or exterior of a building. Building facades are among the largest and most important elements in the aesthetic and artistic performance of a building. On the other hand, it is one of the most expensive and perhaps the most risky elements of any large project. Because of its great importance in achieving the overall safety of the project, facade engineering has become a science in itself that includes a combination of art and engineering sciences that contribute to solving aesthetic, environmental and structural issues to achieve effective enclosure of buildings.