My current project is restoring a large sash window in my breakfast room. I've put it off for 20 years, so glad to be finally getting round to sorting it. I had thought about putting a Upvc replacement in as this is Westerly facing, but have decided to see how well this goes. Total cost will be well short of £100 which includes draught proofing, wood treatment, painting etc.
The top sash is in great condition despite not having been opened or painted for probably 30 years.
The bottom sash has some rot on the bottom rail, but I intend to cut out the rot and put a timber fillet in. It looks a lot worse than it actually is.