Originally posted by MarkJerling Quite a pain when restringing a weighted double-hung sash. The new ropes stretch and break quickly while the old ones can be 90+ years old and still serviceable.
Tell me about it. Our home is 115 years old. We have several windows where the ropes for the lower sash have broken. To retrieve the weight and string new rope requires removal of trim and a blind-secured panel. Truly blind after 115 years of new paint. If you are fortunate in removing the irreplaceable* trim without breaking it, found and removed the blind screw securing the weight pocket panel and removed the panel without damage, you will still likely have to strip and refinish the wood and replace the rusted steel screws to reassemble.
*If you break the (usually brittle) trim such that it cannot be repaired via glue and clamps, you have two choices - replace ALL the window trim in the room, or use the remaining bits of trim to create a custom planner knife and create new trim - further, if the wood is stained rather than painted, you have to try to find wood and finishes that match the rest of the room's woodwork.
Needless to say, we have some nice finished dowels to use as props for some of our windows because I haven't taken the time or risk to replace sash weight ropes.