The document discusses different types of uPVC frames that can be used for doors and windows. It defines uPVC as unplasticized polyvinyl chloride, which is a thermoplastic commonly used for window and door frames due to its durability, insulation, and low maintenance. The document then describes the key benefits of uPVC frames and provides details on different frame types including casement, sliding, tilt-turn, top hung, French, and fixed windows. It also introduces the company AIS Vue that provides uPVC door and window solutions.