uPVC — unplasticized polyvinyl chloride — has become one of the most trusted and long-lasting materials for modern windows and doors. Known for its excellent weather resistance, energy efficiency, and low maintenance, uPVC has redefined how we think about home longevity and performance. But what exactly makes uPVC so durable? In this article, we’ll explore the science, engineering, and practical benefits behind the impressive lifespan of uPVC windows and doors — and why they remain a top choice for homeowners, builders, and architects worldwide.