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Ripplefold snap tape is a narrow nylon or polyester strip, sewn to the back of the top of a drapery panel, with metal snaps set at a fixed distance apart. Those snaps clip into carriers on a traversing track, and the track is what produces the even, soft waves. Most tape is 1 inch wide with snaps 4 1/4 inches on center, and the same tape serves every fullness option. What changes the look is the carrier you pair with it, the fabric you cut, and the track you hang it on.

This guide covers how the tape works, how fullness translates into yardage, how carrier counts and spacing are worked out, what to know before you run ripplefold on a curved track, and which fabrics suit the style.

TL;DR

• Snap tape is a rigid anchor sewn to the back of the heading. The waves come from the carriers and track, not from the tape or the fabric.
• Standard tape has snaps 4 1/4 inches on center and works for 60, 80, 100 and 120 percent fullness. You choose fullness by choosing carriers.
• Fabric width is the finished track width multiplied by the fullness factor: 1.6x, 1.8x or 2x for 60, 80 and 100 percent.
• Panels are made for the hardware. A ripplefold heading cannot be changed on site to a different fold width or hung on rings.
• Curved tracks need extra planning before any fabric is cut. Confirm the track system and radius first.

Table of Contents

• What snap tape actually does
• Spacing: 4 1/4 inches and what it means
• Fullness: choosing the percentage
• Carrier counts and spacing
• Ripplefold on curved tracks
• Fabric choices that suit ripplefold
• Sewing the tape: what the workroom checks
• Our perspective
• Ordering fabric and custom panels from us
• Planning checklist before you order
• FAQ
• Sources

What snap tape actually does

A common assumption is that the heading style creates the waves. It does not. The wave is built into the hardware, where carriers are corded together inside the track at fixed spacing. The snap tape gives the fabric a rigid, evenly spaced attachment point so that each snap meets its carrier. Workroom Tech’s episode on ripplefold drapery describes the same arrangement: the tape is sewn to the top heading and snapped into special carriers on a traversing track.

Two practical consequences follow:

1. The panel is committed to its hardware. Once the tape is sewn on and the fullness is chosen, the fold width cannot be altered on site, and the panel cannot be repurposed for a standard rod with rings.
2. The tape is a small part of the cost and a large part of the result. A crooked or stretched tape line shows as uneven ripples across the whole window.

Ripplefold has a long history in commercial interiors. It is a flat drapery with basic fabrication, and the same source notes it is now popular in residential design, where the clean lines suit contemporary rooms.

Spacing: 4 1/4 inches and what it means

Retail listings for ripplefold tape are consistent on one number. Clear and white tapes are described as 1 inch wide, with snaps 4 1/4 inches on center, suitable for 60, 80, 100 and 120 percent fullness carriers. Some tapes are sold as fitting both Kirsch and Graber track, and some are made in a hard action or loose action snap. The action matters: the hard action version is usually matched with Kirsch hardware, so confirm which track you are using before ordering tape.

The spacing is the unit of measure for the whole job. Think of the tape as a ruler divided into 4 1/4 inch spaces. Each space corresponds to one snap position. The number of spaces you need, and the number of carriers that go with them, depends on your panel width and fullness.

Tape color and fabric

Transparent tape is the usual choice for light and sheer fabrics because it does not show through. White nylon tape suits opaque, medium and heavy fabrics. Snaps are typically nickel plated brass, which is why they do not rust at the window.

Fullness: choosing the percentage

Fullness describes how much fabric is gathered into each foot of finished track. The percentages used in ripplefold map to ordinary multipliers, as Workroom Tech lays out: 60 percent is 1.6x, 80 percent is 1.8x and 100 percent is 2x.

The trade-off is straightforward. More fullness gives a greater stack area at the sides when the drapery is open and a smaller ripple. Less fullness gives less stack and a wider ripple, as the tape supplier’s notes explain.

The 120 percent multiplier is not given in the sources we reviewed, so take it from the carrier manufacturer’s chart for your track.

A worked example

Suppose a window needs a single panel that covers 60 inches of finished track width.

• At 60 percent fullness: 60 x 1.6 = 96 inches of fabric, before hems.
• At 80 percent fullness: 60 x 1.8 = 108 inches.
• At 100 percent fullness: 60 x 2 = 120 inches.

With 54 inch wide fabric, the difference between 96 and 120 inches is the difference between two cuts and three cuts per panel, which affects both yardage and seams. Light fabrics tend to look best at the fuller end. Heavier, textured fabrics often read well at 60 or 80 percent because the weight already gives the ripple body. Also allow for side hems and returns in the calculation, and remember the figures above are fabric before hemming.

Carrier counts and spacing

The number of carriers is tied to the number of snap spaces on the panel, and the manufacturers publish charts so that no one has to guess. One such chart, Vesta’s ripplefold chart for Butt-Master carriers, lists the number of full spaces against the hemmed fabric width, then gives the stack back ranges for 120, 100, 80 and 60 percent fullness, followed by the standard snap carrier and front load carrier measurements and the number of carriers required. In its first row, for example, 7 full spaces goes with a hemmed fabric width of 35 1/2 inches and 8 carriers. The next row, 9 full spaces, goes with 44 inches.

The pattern is worth understanding even if you always follow the chart:

• Carriers are always one more than the number of spaces in that row’s simplest case, because each space sits between two carriers.
• Panel width moves in whole spaces, so fabric width is rounded to the nearest increment the chart allows rather than cut to an arbitrary number.
• Stack back changes with fullness, which is why you pick the percentage before you finalize the window layout.

Charts differ between brands and between carrier types, so use the one for the track that will be installed. For planning stack space beside the window, our guide to how much room drapery stack back really needs covers the general approach.

Master carriers and overlaps

On a center draw, the two panels meet or overlap at the middle. Motorized systems add detail here. Lutron’s published specification for its drapery track notes that ripple fold is offered alongside pinch pleat, that the system is compatible with Graber snap tape, and that a center draw overlap closure uses master carriers with different snap spacing from a butt closure. The lesson applies to any track: tell the workroom whether the closure is a butt, an overlap or a side draw before the tape is sewn, because the snap layout near the center changes.

Ripplefold on curved tracks

Readers often ask whether the style can follow a bay or a curved wall. Track makers do produce curved and bendable tracks for traversing drapery, but the answer depends on the system, the radius and the carrier type, and those limits are set by the track manufacturer, not by the tape. Before ordering fabric for a curved run:

1. Confirm with the track supplier that the exact system is rated for ripplefold carriers on a curve and for the radius you need.
2. Ask for the carrier and stack back chart for that track, since fullness math on a curve can differ from a straight run.
3. Measure the length of the curve along the track path, not as a straight line between its ends.
4. Keep panel breaks at the points where the track changes direction so seams do not fall in a corner.

If the curve is tight, a different heading style may be the better answer. Our hidden back tab drapes give a streamlined look on a rod without special carriers.

Fabric choices that suit ripplefold

Because the heading is flat and the fold is regular, the fabric is what the eye lands on. A few guidelines:

• Solid and tone on tone fabrics show the ripple shape most clearly. Woven textures and subtle patterns add depth without hiding the fold.
• Medium weight fabrics hold the wave. Very stiff fabrics resist folding, and very thin ones can look limp at low fullness unless you move to 100 percent or higher.
• Large pattern repeats are harder, because the ripple interrupts the motif. Embroidery works better when the design is evenly distributed. Browse our embroidered fabrics for custom curtains to see which scale of pattern holds up in a fold.
• Lining adds weight and improves the way the wave hangs. Discuss it at the design stage so the lining and face fabric are cut to the same measurements.

For modern interiors, our modern fabric collection is a practical starting point, with fabrics sold by the yard.

Sewing the tape: what the workroom checks

If you or your workroom are making the panels, the sequence matters more than any single trick.

1. Hem first. Finish the side hems and the bottom hem, then fold the heading allowance to the back.
2. Keep the heading stable. Interfacing or buckram at the top keeps the tape line straight, as the tape sits on the back of the heading.
3. Place the tape on the back, at the top. Align the snap line so that the carriers will hold the top edge at the intended height.
4. Center the spaces. Start and end with a snap position that matches your chart, so a half space does not land in the middle of the panel.
5. Sew both edges of the tape without stretching it. Nylon tape that is pulled during sewing will relax unevenly after installation.
6. Test on the track before final pressing, snapping into the carriers and drawing the panel open and closed.

Our perspective

We work with fabric every day, and the pattern we see is that ripplefold projects go wrong before sewing begins, at the stage where hardware and fabric are chosen separately. The tape is simple, but the system is not forgiving: the carrier spacing, fullness and panel width have to agree with one another, and the panel cannot be adjusted afterward.

Our advice is to decide on the track first, choose fullness from the look you want and the stack space you have, and only then order fabric. For custom work, a design consultation is the right place to settle these points, because it is cheaper to change a number on paper than a panel on a table. We would also encourage ordering a fabric sample and hanging it in the room’s light before committing to full yardage, since the same fabric can read quite differently at 60 percent and at 100 percent.

— Marrion

Ordering fabric and custom panels from us

We are a fabric store in Columbia, SC, with a custom drapery making service, design consultations, fabric samples and nationwide shipping. If you are planning a ripplefold installation, you can start with fabric by the yard from our shop and request samples, or talk with us about having panels made to your measurements. Pricing is not published on our site for the custom drapery service, so ask about your specific project.

Planning checklist before you order

• Track brand and type, and whether it is straight or curved.
• Finished track width and the stack space on each side.
• Draw type: center draw with butt or overlap, one way, or split.
• Fullness percentage and the resulting fabric width.
• Tape type that matches the track, including action and color.
• Fabric weight, lining and pattern scale.
• Finished length, allowing for how the panel will clear the floor or sill.

FAQ

What is the difference between S-fold and ripple fold curtains?

Both give a soft wave, but they are built differently. Ripplefold relies on snap tape and carriers fixed at set intervals inside a traversing track, so the waves are engineered by the hardware. S-fold is commonly made with a tape that creates the folds in the heading itself, and it can hang from carriers or rings. Check the product description for which hardware a heading needs before you order.

Can I use ripplefold snap tape on a regular curtain rod?

No. The tape snaps onto carriers designed for a ripplefold track, and the fold width is set by those carriers. A panel made this way cannot be adjusted on site or repurposed for a rod with rings, so choose the hardware first.

What fullness should I choose?

The common options are 60, 80 and 100 percent, equal to 1.6x, 1.8x and 2x the finished width. Lower fullness gives wider ripples and a smaller stack. Higher fullness gives smaller ripples and a larger stack. Light fabrics usually benefit from the fuller end, while heavier fabrics often look good at 60 or 80 percent.

How many carriers do I need?

The number depends on panel width and fullness, and it should come from the carrier manufacturer’s chart for your track. Charts list the number of snap spaces, hemmed fabric width and carriers required side by side, so you can read the count directly. Give your workroom or supplier the track type and measurements and they can confirm it.

Sources

• 30-Minutes with Workroom Tech: Episode 36, Ripplefold Drapery with guest Ann K. Johnson
• Vesta Drapery Hardware ripplefold chart, Butt-Master carriers
• 4-1/4" spacing ripplefold tape, transparent (product specification)
• Lutron drapery track chassis specification

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