China windows and doors

 The earliest mullioned windows are found in Han tombs and Taowu Ming wares. There are also a large number of brick, wooden buildings and murals in Tang, Song, Liao, and Jin. Since the Ming Dynasty, it has been gradually replaced by sill windows in important buildings, but it is still used in civil buildings. Before the Tang Dynasty, there were still many mullion windows, which were fixed and could not be opened, so their functions and shapes were restricted.  Since the Song Dynasty, there have been more and more open and closed windows, and there have been great developments in type and appearance. In the Song Dynasty, a large number of lattice windows were used, in addition to square lattices, there were ball patterns, ancient money patterns, etc., which improved the lighting conditions and increased the decorative effect. The threshold windows of the Song Dynasty have been applied to the sill walls on each side of the hall door. They evolved from lattice doors, so they are similar i

 Wood: Convenient processing and repair, more light blocking, excellent heat preservation performance, solid wood easily deformed, integrated wood for high-end wooden windows Steel: Standard steel window material (solid web, empty web) is strong and durable, fireproof, less light-blocking, economical, poorly maintained, easy to rust, and poor thermal insulation performance Stainless steel: excellent decorative effect, no rust, high cost Aluminum alloy: extrusion molding, good decoration effect, poor heat preservation, high energy consumption Plastic steel: good overall performance, cost-effective Broken bridge aluminum: There are two forms of wear strip and glue injection, energy-saving and heat-insulating, strong and beautiful. Glass: often used to make indoor partitions, frameless pop-up doors, etc. FRP, glass fiber reinforced material, is a new type of composite material, which has many advantages such as light weight, high strength, anti-corrosion, heat preservation, insulation, so