Handmade in Britain since 1979
Craftsmanship with enough discipline to disappear into the building.
Box Sash combines traditional timber joinery with modern glazing, security and performance from a 25,000 sq ft UK joinery.
A workshop, not a catalogue
The product starts with the house.
Survey, proportions, mouldings, glazing, hardware and colour are developed as one specification. That is what lets a new window or door feel natural in a period room or on a formal façade.
Modern performance matters, but it should not flatten the detail that made the original architecture worth keeping.
About Box Sash
Bespoke timber windows and doors made in Britain
Box Sash was established in 1979 and says its bespoke products are handcrafted in a 25,000 sq ft UK joinery by a team with more than 200 years of collective experience.
The company manufactures and installs traditional hardwood windows and doors, combining classic mouldings and period detailing with modern glazing, security and weather performance.
