Prestige seamlessly integrates the sleek aesthetics of aluminum with outstanding thermal efficiency, achieving up to an A+ Window Energy Rating.* Our revolutionary Thermlock multi-chamber thermal design, discreetly embedded within each window and door, ensures superior insulation against harsh UK weather conditions. This closed-cell, insulating chamber serves as a thermal barrier, working in harmony with high-performance glazing to deliver top-tier thermal performance, surpassing conventional polyamide thermal breaks. Sheerline's sills incorporate the same advanced technology, complemented by innovative built-in weather sealing, effectively keeping draughts and rain at bay.

Thermal transmittance, often referred to as the U-value, quantifies the rate of heat transfer through a window. The lower the U-value, the more effectively insulated the window is. Our windows are available with up to 44mm triple glazing, offering unparalleled thermal performance. Additionally, triple glazing can significantly reduce noise infiltration, providing exceptional acoustic dampening to block out unwanted sounds.

Our patented corner jointing method establishes remarkably robust frames, leveraging the inherent strength of Sheerline's aluminum construction to the fullest. Incorporating a full-depth eurogroove allows us to provide the latest high-security, multipoint locking mechanisms, enhancing the safety and security of you and your home. Additional features such as unique hinge protectors further elevate security measures to exceptional levels. Prestige's innovative integrated design ensures that both window and door lock cases are fully enclosed, preventing them from protruding into the glazing or beading areas, which could potentially compromise the frame's integrity. If you prioritize peace of mind, rest assured, we've got you covered. Opt for our laminate glass upgrade for Secured by Design accreditation*, endorsed by the official UK Police initiative, aimed at "designing out crime" through physical security measures.

Sheerline aluminum windows offer a selection of two opening sash styles: 'Stepped', inspired by traditional steel windows, and 'Contemporary', featuring a modern minimalist aesthetic. Both styles are available with either our standard outer frame or as a 'Flush' option, aligning both the perimeter and the opening sash seamlessly with each other. We're pleased to provide guidance on which option would perfectly complement the style of your home if needed..