Frequently Asked Questions
Can sash window cords be replaced without removing the whole window?
Yes. An experienced joiner or glazier can replace sash cords by removing the staff bead, lifting the sash out of its channel, replacing the cord, and refitting — all without taking the whole frame out.
Is it worth repairing old sash windows rather than replacing them?
Often, yes. A well-repaired and draught-proofed timber sash window can perform well and last for decades. Replacement makes sense when the timber has seriously deteriorated or when you need significantly better thermal performance and are free to change the window type.
Can I get double glazing in sash windows?
Yes — but the sealed unit needs to be thin enough to fit within the sash rebate, which is typically shallower than in a casement frame. We use 4-12-4 slim sealed units designed specifically for sash retrofit applications.
Can secondary glazing work with a sash window that still needs to open?
Yes. Secondary glazing for sash windows uses sliding or lift-out panels that allow normal operation of the original sash. It's a common solution for listed buildings and conservation areas.




