Visit Us article provides a detailed look into the world of uPVC windows, highlighting everything from their advantages to trade opportunities. What Are uPVC Windows? uPVC windows are made from rigid and durable plastic known as polyvinyl chloride. Unlike traditional plastic, uPVC does not include additives Trade uPVC Windows: A Comprehensive Guide for Businesses and Homeowners uPVC (unplasticized polyvinyl chloride) windows have become a cornerstone in modern construction due to their durability, efficiency, and aesthetic appeal.