How to Repair a Cord Loop Control

Cord Loop Controls

Controls of this type are very reliable. A cord may need to be replaced because it has gotten dirty from handling. Cords can also fray and break due to normal wear and tear. Repairs are easy.

Measure the Old Cord Loop

The first thing you will need to do is determine the size of your old cord loop. You want the new one to be the same size. That way you can avoid having to move the pulley attachment and you won’t make any new screw holes in your wall or window frame. Measure the length of the loop, not the length of the string. Loops are normally measured in whole feet only – that is, they are available as 3 foot, 4 foot, 6 foot, etc.

2 foot long cord loop
A 2 foot long cord loop

4 thoughts on “How to Repair a Cord Loop Control”

  1. I have several windows with shades that have continuous cord loops that keep breaking at the butt weld for the loop. I would like to purchase a tool to repair the welded butt joint rather than purchasing several different prefabricated cord loops. Where can I obtain such a welding/splicing tool?

  2. Hi Jim,

    While I have never actually seen the cord loop fabrication process, it is my understanding that cord loops are welded together with high strength hot melt adhesives using machinery that is kind of pricey. I know from first hand experience that the hot melt available in craft stores is not strong enough.

    Cord loops are prefabricated in a set number of sizes and can’t be ordered made-to-measure. I suppose this is because cleanup after a production run is probably not the sort of thing you would want to have to do every day.

    To get a better feel for what kind of machinery we are talking about you may want to check out the videos at Hot Melt News, a blog site from a hot melt supplier. There aren’t any videos about cord loop fabrication machines but if you are a bit of a gear-head like me you might enjoy them just for what they are.

  3. I stumbled onto this discussion while trying to answer for myself the same question Jim Newsom asked. I have had success in customizing the loop length with a high-heat butt meld of the cut ends of a Hunter-Douglas cord loop. I hold the 2 ends against a tip of a soldering iron (the iron is stabilized in a clamp or vise) and then, as they start to melt, I pull them away and quickly push them against eachother and roll the joint with my fingers (hot, but not terrible). Once cool, careful trimming and shaping with a Dremel smoothes the joint and keeps it to the same calibre as the cord. Practice with some scrap pieces first, and although it doesn’t glow red, remember that the soldering iron is dangerous and keep your fingers and other flammables away.

  4. Hey Jeff,
    Good suggestion. I especially like the idea of the Dremel tool to trim the welded joint. I often encounter a rough weld on a new cord loop straight out of the factory. That’s a great solution and it gives me an excuse to buy a new tool. Thanks for contributing.

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