Application segmentation delineates the end‑use environments where unplasticised rigid PVC windows and doors are installed. In the residential segment, the product’s low maintenance, thermal efficiency, and cost advantage drive the majority of demand, accounting for roughly 55 % of total market volume. The commercial segment—comprising office towers, retail complexes, and hospitality facilities—contributes about 30 % as developers prioritize fire‑rating compliance and acoustic insulation, which unplasticised PVC can meet without compromising structural rigidity. The institutional segment, including schools, hospitals, and government buildings, represents the remaining 15 % and is characterized by stricter regulatory scrutiny and longer procurement cycles, which influence adoption rates. Collectively, these application categories shape the overall market size by allocating resources, R&D focus, and distribution channels according to the distinct performance criteria of each end‑use. This Unplasticised Rigid PVC Windows and Doors segmentation framework enables analysts to forecast growth patterns across the three primary demand pools.