Architecture is often considered the second skin of the Earth. It covers the ground and opens up space for human habitation. Yet most buildings, except open-air pavilions, have a skin or facade. Human skin covers 90% of the human body, and building skins cover the facades and sometimes the top of buildings. Building skins come in many materials, patterns, and textures. They are applied to the surface of buildings. Building skins are sometimes also called “shells or envelopes.” Building skins clad or cover the building. This skin encloses and shelters the interior spaces and is a key component determining a building’s personality. Building skins is under construction. If you have any ideas, please share!