The terms UPVC and PVC are often used interchangeably, but there is a slight difference. UPVC windows are made from unplasticized polyvinyl chloride, which is a more rigid and durable form of PVC. Regular PVC windows are softer and more flexible, making UPVC windows more suitable for long-term use in window installations. Because every house and installation is different, we recommend getting in touch for a free consultation with our Inverness installation experts. Call our Inverness branch today on 01463 641 256