Replacing old sash cords - worth the hassle or just call a pro?

Totally get what you mean about the stubborn streak - it’s almost like these old windows are testing your patience on purpose. I replaced my first set of cords last winter, and honestly, the fiddliest part wasn’t even the cords themselves. It was getting those stops off without splintering the wood, then realizing one had warped just enough to make everything a pain to line up. Ended up sanding and shimming to get it to sit flush again, but wow, what a difference in drafts.

One thing I’m still not sure about is whether it’s worth using the original-style cotton cords or just going with the synthetic ones. The old-school look is nice, but I’ve heard the synthetics last longer - though they seem a bit more slippery to tie off. Anyone tried both and noticed a real difference? And did anyone bother repainting the stops before putting them back, or just leave them as-is? I always wonder if it’s worth the extra step or just overkill for something nobody sees.

- Used both types of cords. Synthetics definitely last longer, but yeah, they’re slick - double knots help.
- I usually slap a quick coat of paint on the stops if I’ve got the brush out anyway. Not perfect, but keeps things tidy if you ever open them up again.
- Honestly, after wrestling with those stops, I’d say patience is the real MVP here.

Yeah, patience is half the job - especially when you hit a stop that’s been painted shut since the ‘60s. I’m with you on synthetics lasting longer, but they can be a pain to tie off if your hands are dusty or cold. I’ve seen folks use a tiny dab of wood glue on the knot, just to keep it from slipping, but that’s probably overkill for most. Painting the stops makes a difference too… I’ve come back to jobs years later and actually appreciated my own laziness there. Just wish the weights were easier to fish out sometimes - those things always find a way to wedge themselves in weird spots.

That bit about fishing out the weights is so true - last time I did it, I swear one got stuck behind a chunk of old plaster and I had to rig up a bent coat hanger just to get it loose. I agree, painting the stops makes a surprising difference, especially if you ever have to pop them off again. For tying knots with synthetic cord, I keep a damp rag handy to wipe my hands - makes a world of difference if you’re working in a dusty room. I’m still not sure glue is necessary, but maybe I’m just stubborn.

Funny you mention glue - I've actually had a few cords slip on me over the years, especially the slicker nylon stuff, and a dab of wood glue right on the knot has saved me some headaches. Maybe it’s overkill, but after rehanging the same sash twice in one week, I figured a little insurance couldn’t hurt. That said, I totally get not wanting to deal with the extra mess. I’m always torn between “good enough” and “do it once, do it right”… probably why my projects drag on forever.

That said, I totally get not wanting to deal with the extra mess. I’m always torn between “good enough” and “do it once, do it right”… probably why my projects drag on forever.

- Totally get the “do it once, do it right” struggle - been there.
- Using glue on knots is clever, especially with nylon. I’ve had those slip too.
- Quick tip: cotton sash cord holds knots better and is less slick, but doesn’t last as long as synthetic.
- If you’re already rehanging the sash twice, a little extra effort now could mean less wasted energy from drafts later.
- Sometimes the mess is worth it for the peace of mind... but yeah, projects always take longer than I expect.

- Had a job last fall where the homeowner tried to shortcut with cheap cord - ended up calling me back when it snapped a month later.
- Agree on cotton vs. nylon, but I’ve had old cotton fray in humid houses.
- Honestly, if you’re already deep into the mess, taking the time to seal gaps while you’re in there pays off.
- Not gonna lie, sometimes the “do it right” approach feels endless... but it does keep the callbacks down.

Yeah, cutting corners with cheap cord is just asking for trouble. I’ve tried both cotton and nylon - nylon holds up way better, especially if there’s any moisture around. Sealing gaps while you’re at it makes a difference too, even if it’s a pain. It’s a hassle, but at least you’re not fixing the same window twice.

nylon holds up way better, especially if there’s any moisture around

I’ve actually had the opposite experience with certain old windows - nylon can stretch a bit over time, which throws off the balance. Cotton swells and frays, sure, but with the right waxed sash cord, you get decent longevity. The real game-changer for me was using polyester rope; it’s got the durability of nylon but doesn’t stretch as much. Sealing gaps is a pain, agreed, but I’d argue that if you’re already in there, swapping out weatherstripping is just as crucial as new cord. Otherwise, you’re losing efficiency no matter what cord you use.

I hear you on the nylon stretching - ran into that myself a few years back in my 1920s place. Thought I was being clever, but after a couple of humid summers, the sashes started drooping like tired eyelids. Polyester rope’s been my go-to since then. It’s not perfect, but at least my windows don’t slam shut unexpectedly anymore.

And yeah, weatherstripping is one of those things you swear you’ll do “next time,” but if you’re already deep in the guts of the window, might as well just bite the bullet. I skipped it once and regretted it every winter - felt like I was heating the whole neighborhood. The hassle is real, but unless you’re allergic to paint chips and cursing under your breath, I’d say it’s worth tackling yourself. Pros are great, but they charge like you’re restoring the Louvre. Sometimes DIY just makes more sense, even if you end up with a few extra bruises and a story to tell.