WPC Window Frames: A Durable Alternative to Traditional Frames When it comes to long-lasting and efficient window frames, WPC (Wood-Plastic Composite) frames lead the way. These frames are designed to overcome the limitations of traditional wood frames by offering enhanced strength and resistance to environmental factors. WPC window frames do not warp, crack, or corrode, ensuring a s... http://mayoworld.com/suppliers/wpc-window-frames