The debate around uPVC vs aluminium windows continues to dominate conversations among UK homeowners planning window replacements. But the landscape has shifted dramatically in the past two years. What was once a straightforward choice based purely on budget has evolved into a nuanced decision influenced by energy regulations, design trends, and long-term performance. Read our complete guide to windows buying guide UK for comprehensive advice on choosing the right windows for your home. ## Key Takeaways Aluminium windows now outsell uPVC in London and other major cities, driven by slimline aesthetics and heritage property requirements Triple glazing adoption has jumped from 15% to 37% of new installations since 2022, primarily due to updated Building Regulations Part L Composite front doors have overtaken both uPVC and timber, capturing 52% of the replacement door market with superior security ratings The price gap between uPVC and aluminium has narrowed considerably — expect £600-900 per window for quality uPVC vs £800-1,200 for aluminium Grey and anthracite finishes now account for over 60% of all new window orders, with white uPVC declining sharply ## What's Driving the Shift Towards Aluminium? We've tracked a remarkable transformation in the windows & doors sector over the past 18 months. Aluminium window installations have surged 43% year-on-year according to the Glass and Glazing Federation, whilst traditional white uPVC sales have dropped by nearly a quarter. The