Sternfenster has expanded its premium PVC-U portfolio with the launch of Timberline, a next-generation flush sash system designed to deliver the warmth and authenticity of timber with the efficiency, practicality and consistency of modern manufacturing.
Developed to meet growing demand for high-end heritage and contemporary installations alike, Timberline replicates the refined proportions and subtle detailing of a traditional timber flush sash, but with a number of engineering innovations that set it apart in the market.
The most significant is its unique square-welded internal and external joints. While other manufacturers rely on a 45-degree internal mitre, Timberline achieves a clean, perfectly squared finish on both sides of the sash and frame. This not only enhances authenticity but creates a sharper, more architectural aesthetic that homeowners and designers increasingly favour. “Timberline is a leap forward in timber-alternative design,” said Nathan Court, Sternfenster’s Chief Sales Officer. “Installers told us they wanted a flush sash that truly stood out – something with the craftsmanship and visual depth of timber but the efficiency and reliability of PVC-U. Timberline delivers exactly that, and the square weld is a genuine USP that sets a new benchmark for the category.”
Performance has been engineered to match its aesthetics. Timberline achieves outstanding thermal efficiency, with U-values as low as 1.2 W/m²K, and has been designed to meet the latest security requirements, including PAS 24 options.
“Timberline gives our customers a product that is both beautiful and technically robust,” added Nathan. “It expands their ability to win work in the premium and heritage sectors while offering homeowners a window that combines authentic design with modern-day performance.”
