TwinSash is a unique window product that delivers unrivalled thermal and acoustic performance.
The clever design of the patented TwinSash outerframe accommodates two sash frames and positions them one in front of the other. The result is an air-tight pocket, sandwiched between two thermally efficient sash frames. TwinSash was the UK's first 'A' rated window.
All components are compatible with System10 and Rustique, minimal tooling is required and it accepts all standard hardware. You can be manufacturing TwinSash within days. TwinSash is easy to manufacture, simple to install and more than meets the demands of today’s market.