Double piping is one of those small details that makes a DIY upholstery project look like it actually came from a high-end furniture store. If you've ever looked at a vintage armchair and noticed that nice, thick corded trim covering the staples along the wood frame, you're looking at double piping. It's essentially two rows of welting (piping) sewn together to create a wide, elegant finish that hides all the messy bits of a project.
I remember the first time I tried to finish a chair without it. I thought I could just use a single row of piping or maybe some gimp braid. The result? It looked… okay, but it definitely lacked that "finished" punch. Once I figured out how to make and apply my own double piping, everything changed. It's not nearly as intimidating as it looks, and honestly, it's kind of satisfying to put together once you get into the rhythm.
Why Use Double Piping Instead of Single?
You might be wondering why you'd go through the extra effort of making two rows of cord instead of just one. The biggest reason is functionality. In upholstery, when you're attaching fabric to a wooden frame, you're usually using staples. Those staples need to be hidden. A single row of piping is great for seams on a cushion, but it isn't wide enough to bridge the gap between the fabric edge and the wood while successfully hiding the hardware.
Double piping sits perfectly over those raw edges. Because it has two distinct humps, it creates a little "valley" in the middle where you can apply glue or even hide tiny tacks. It also adds a bit of architectural weight to the piece. It makes the lines of a chair feel more intentional and sturdy. Plus, it just looks more expensive.
Getting Your Materials Ready
Before you even touch your sewing machine, you've got to get the right supplies. You can't really "wing it" with double piping because the thickness of the cord needs to match the width of your sewing machine foot.
Most people use tissue cord or a polyester welt cord. For a standard chair, 5/32" or 1/4" cord is pretty typical. If you go too thick, it starts to look a bit chunky and becomes a nightmare to bend around tight corners. If you go too thin, it won't hide those staples.
You'll also need fabric, obviously. One of the best things about making your own is that you can match your chair perfectly. Or, if you're feeling bold, you can use a contrasting color to make the trim pop. Just make sure the fabric isn't too thick. If you're using heavy velvet or a thick tapestry, the double piping can get really bulky and hard to manage.
The Magic of the Bias Cut
I cannot stress this enough: always cut your fabric strips on the bias. If you just cut straight strips along the grain of the fabric, you're going to have a bad time.
Cutting on the bias—meaning at a 45-degree angle to the finished edge—gives the fabric a natural stretch. This is crucial for double piping because you'll likely be navigating curves. If your fabric has no "give," it will pucker, wrinkle, and look generally messy when you try to wrap it around the top of a chair back.
The Sewing Process
Okay, let's talk about the actual construction. This is where a lot of people get nervous, but if you have the right tools, it's a breeze.
Ideally, you want a double piping foot for your sewing machine. This foot has two grooves on the underside that the cords sit in. It keeps everything aligned so you aren't fighting the fabric as you sew. If you don't have one, you can use a zipper foot, but you'll have to be much more careful about keeping your lines straight.
Step-by-Step Breakdown
- Wrap the first cord: Lay your fabric strip (wrong side up) and place the first cord in the center. Fold the fabric over and sew close to the cord.
- Add the second cord: Here's the trick. You don't wrap the second cord separately. You tuck it right up against that first sewn cord.
- The final pass: Fold the remaining fabric over the second cord and sew down the middle—right in that "valley" between the two cords.
The goal is to have the two cords sitting snugly against each other. If there's a gap, it'll look sloppy. If they're overlapping, it'll be too thick to glue down. You want them to look like two peas in a pod.
Attaching the Piping to Your Furniture
Once you have your long strand of double piping, it's time to put it on the furniture. Most modern upholsterers use hot glue. I know, it sounds a bit "crafty," but it's actually the industry standard for a reason. It's fast, it holds incredibly well, and it's easy to control.
The key is to use a high-temp glue gun and be sparing. You don't want giant globs of glue oozing out the sides. You apply a bead of glue into the "valley" of the piping or onto the staple line of the chair, and then press the piping firmly into place.
A little pro tip: Keep a small bowl of cold water nearby. If you get hot glue on your fingers (and you probably will), dipping them in water immediately will save you from a nasty blister. Also, keep a pair of sharp snips handy for those end joins. Joining the two ends of double piping so the seam is invisible is an art form in itself, but usually, if you tuck the raw edge under at the least visible part of the chair (like the bottom back), no one will ever notice.
Common Mistakes to Avoid
Even if you've been sewing for years, double piping can throw you a curveball. Here are a few things I've learned the hard way:
- Wrong Tension: If your sewing machine tension is too tight, the piping will want to curl like a pig's tail. If it's too loose, the fabric will slip around the cord. Do a test strip first!
- Ignoring the Grain: I mentioned this before, but it's worth repeating. If you don't cut on the bias, the fabric won't "hug" the cord properly, especially on the inner curves.
- Bulk at the Joins: When you reach the end of your run, don't just overlap the cords. It creates a huge lump. You should actually trim the inner cord back about half an inch, fold the fabric over, and then lay it down. It makes the transition much smoother.
It's Not Just for Chairs
While we usually talk about double piping in the context of furniture, it shows up in other places too. I've seen some incredible cake decorating techniques that mimic this look using fondant. It's also used in high-end fashion, particularly on structured jackets or vintage-style handbags.
In the world of home decor, you might see it on the edges of fancy throw pillows or even as a decorative border on heavy curtains. It adds a level of "heft" that single piping just can't match.
Final Thoughts
At the end of the day, mastering double piping is just about patience and having the right foot for your machine. It turns a "homemade" project into a "hand-crafted" one. It's that final touch that says you actually took the time to do things the right way.
Next time you're at a thrift store and see an old chair with good bones but terrible fabric, don't let the trim intimidate you. Grab some cord, find some fabric you love, and give it a shot. You'll be surprised at how much of a difference those two little rows of cord can make. It's one of those skills that, once you have it in your back pocket, you'll find yourself wanting to add it to everything you make. Happy sewing!