Our house has the old kind of sash weights. Those sash weights perform two functions. They counterbalance the window so that it moves up and down freely and, since this is Los Angeles, they knock together loudly in an earthquake letting us know the rough magnitude and whether we should duck under a table.
When we moved into the house nearly every sash cord was busted and none of the windows functioned. Repairing these old windows is as lost an art as Roman augury. Most homeowners and house flippers here throw out the old windows and replace them with the sort of cheap sliding aluminum portals like you find on 1970s era truck camper shells.
That’s too bad, since the old windows look a lot better and are easy to repair. Here’s how you do it:
1. Look for an access panel in the window channel. If there is one, you’ll be able to access the weights and tie the cord to them through the panel. We weren’t so lucky. If you don’t have an access panel you’ll need to remove the window trim on either the inside or outside of the house in order to access the weights and the broken cord. I chose to remove the outside trim since it would make less of a mess and be easier and more forgiving to patch up.
2. If the cord is still in good condition you should be able to just retie it to the weight and the window should be back in operation. If not, you’ll need to get some replacement cord at your local hardware store.
3. To install a completely new cord remove the window from the frame and locate the circular hole seen in the diagram below:
Having lived with old windows now for seventeen years, I’m a fan. The cord/sash weight/pulley combo works a lot better than many newer windows I’ve dealt with. The downside is that the cotton cords break eventually. But they are easy to fix.