The research sheds light on the optimal choice of materials for 
external cladding, so it is considered complementary to the 
design of the outer casing of architectural facades, because the 
language of the material helps to highlight the aesthetic value of 
the plastic treatments of design, the merging of material with the 
design achieves a desired goal, which is evident through the 
design capabilities of the decorated designer. The outer casing of 
the architectural facades combined with the selection of the 
materials used that serve the form in the first place and then 
narrate the history and philosophical content of the design in the 
second place, and the raw materials for the external cladding 
represent one of the technological elements that witnessed a 
remarkable development in the twentieth century and was 
associated with architectural beautification where traditional 
materials were used and the development of their use and new 
ones And it is considered an apparent influence of its importance 
on the perceptual vision of design from several important aspects 
such as proportions, color, texture and others in the service of the 
design idea in accordance with the nature of the tasks of each 
institution, in addition to the diversity of the nature of the 
materials, some of them are agile materials GRP or interactive 
such as smart materials and others are easy to form such as 
credit, where it is determined The choice of material is based on its flexibility, the more flexible, light materials are used, the more 
The flexibility of the formation and the increase in the connection 
and continuity between the design elements, which gives the 
opportunity for the decorated designer to create advanced designs 
in rhythm and color and to use all the means available to him to 
adapt the materials to add an artistic and aesthetic appearance to 
the covers of buildings. What is more is the possibility of using 
certain materials to clad the outer covers of buildings and to treat 
them as a piece of plastic art, which changes the shape of the 
building as if it is reviving it again, based on the purpose of 
changing the facade of the building if it is for the purpose of 
renewal and repair or to change its identity. In both cases, the 
materials are adapted for cladding according to the executed 
design to achieve both aesthetic and functional value.