Casement UPVC windows are hinged on one side and open outward, similar to a door. This design allows them to offer unobstructed views and excellent ventilation. Made from UPVC (Unplasticized Polyvinyl Chloride), these windows combine the traditional elegance of casement windows with the modern benefits of UPVC material. Casement windows have a rich history that dates back several centuries. Initially, they were constructed using metal frames and leaded glass. However, as the Victorian era began, timber became the primary material for both the casements and frames of these windows. These versions were often referred to as heritage casement windows and were designed with functional exterior shutters that opened outward.