Kesvir

Kesvir sells architectural aluminium glazing—slim-framed sliding doors, lift-and-slide patio systems, and frameless glass walls—priced in the premium band. Typical residential projects run £15-40 k per installation before VAT. The company trades only through its UK website and a Buckinghamshire showroom; all units are made-to-measure and delivered nationwide. The brand promotes “thermally broken aluminium with 20 mm sightlines” and U-values as low as 0.74 W/m²K, positioning itself at the intersection of minimal design and Passivhaus-level performance. Its Invisible Wall system, which hides the outer frame inside the building structure, is frequently cited on Grand-Designs-style self-build blogs. Every order is engineered in the Netherlands then pre-glazed in the UK, allowing RAL colour matching and triple-track options within a 4-week lead time. Customers are architects, luxury self-builders and upscale renovators who want daylight maximisation without sacrificing SAP ratings. They value the clean, steel-look aesthetic, the ability to span 6 m single spans, and the fact that Kesvir will provide structural calculations for building-control sign-off. Kesvir competes with mainstream aluminium fabricators that sell through builder’s merchants and with ultra-premium German systems houses. It differentiates by offering German-level thermal and sightline performance at a lower landed cost, while keeping the specification process direct-to-consumer and supplying UK-specific certification and after-sales support.