General purpose of this article is to Discuss on Introduction to Rainscreens. The function of rainscreens is always to offer protection to the external walls of virtually any building from rains along with climatic changes. A rainscreen diverts the direction of rainwater, and therefore saves the construction from moisture problems. Generally, rainscreens comprise of an external cladding. Cladding for rainscreens could be made from stone, a glass, wood, masonry or metallic. Cladding reduces the force with which rain punches the protected surface, as you move the cavity at its back goes to reduce the thrust of rainwater more than a support wall.