Stylish, secure and sustainable, uPVC windows for every home, office or building. Our double glazed units use 24 & 28mm low emissivity (Low-E) glass along with a warm edge spacer bar to improve the thermal efficiency. Secure locking system. Internally beaded for added security. Trickle vent system allowing clean fresh air ventilation even when the window is locked and secure. Stippolyte Glass Supplied with chrome handles and grey on white sill Complies with 2022 Building Regulations regarding thermal performance Part L replacment & extensions