Sliding folding door looks like a frameless frame with its frame at the upper and lower ends of the glass. Frameless windows are safer than framed windows. The frameless window adopts the national safety tempered glass that has passed the test. Compared with the general glass used for the frame window, the tempered glass has the advantages of impact resistance and friction resistance, and also has the function of anti-theft. It has good air tightness and water tightness, and has obvious advantages in terms of visual lighting and glass cleaning, as well as solving arc-shaped balconies, so it is currently popular.sliding folding doors let you get close to the sun.