SashWise is a family-run timber window company based in Twickenham, West London. We have been operating in South West London since 2006.  We have a longstanding history of working in conservation areas and on heritage buildings.  We are specialists in the restoration, replacement and reinstatement of traditional timber sash and casement windows. 

We can completely replace timber sash or casement windows to replicate the original design and architectural features.

All our new joinery is made with Accoya timber, this includes new double-glazed sashes, new sash boxes, new casement windows, replacement sill’s, replacement single glazed sashes and French doors.

We have an experienced team of craftsmen and we pride ourselves on the quality of our work and our high level of customer service.