UPVC Door And Window Frame This UPVC Door And Window Frame is known for its high strength and supreme finish. Designed with the aid of innovative techniques, the offered frame gives excellent stability to one side of the doors and windows. Our frame is well coated using unplasticised polyvinyl chloride that helps to extend the durability and appearance of the doors and windows. It provides high security to the door locking system in order to facilitate them gently. Moreover, its L-shaped structure can easily be fitted at the corners.