Not every window needs to be replaced. In many period homes across South West London, existing sash frames are structurally sound and can be brought back to life through professional sash window repair. Whether it’s a question of broken cords, stuck sashes or rotten timber sections, targeted repairs offer a cost-effective and conservation-friendly solution.
Homeowners in areas like Streatham, Clapham and Wimbledon often find their properties come with original joinery that, while tired, is fundamentally solid. Repairing these elements helps retain the value and character of the property while improving usability and insulation.
Sash window repair typically involves replacing failing putty, splicing in new timber where rot has taken hold, and updating hardware. Cords, pulleys and draught seals are also upgraded to improve functionality and thermal performance. Glazing units may be swapped for slimline or acoustic variants, improving comfort without compromising design.
In a recent Wandsworth project, a five-window bay was restored using a blend of repair and selective reproduction. The homeowner wanted to preserve the original look but improve energy efficiency. After careful assessment, we retained the box frames, replaced the sashes with identical profiles, and installed new glazing. The visual continuity was perfect—and internal temperatures rose noticeably in colder months.
For developers, repairing original joinery can reduce costs and satisfy conservation constraints. It also speaks to the growing preference for retaining and upgrading rather than demolishing and replacing.
The decision to repair rather than replace depends on the condition of the frame, glazing and internal hardware. But with professional assessment and modern materials, even 100-year-old sash windows can be restored to full working order.
To assess whether your windows can be preserved or need replicating, explore our range of hardwood timber windows and refurbishment services.