Wave curtains
Wave curtains hang from a track in even S-shaped folds with a flat, clean top. See how they hang, what they need and what they suit.
What it is
A wave curtain hangs from a track in even, S-shaped folds.
The top is flat, with no gathers above the track.
Looks and hangs like
Each fold hangs from its own glider in the track.
One fold comes forward and the next goes back.
From one fold to the next is about 12 to 16 cm.
Drawn back, the curtain stacks into a narrow column that takes up much less room than a traditional heading.
The open curtains take up about a fifth of the track, pulled tight.
The stack is at most 16 cm deep, front to back.
Suits
Wave is a common heading for lounges and sliding doors.
It reads as modern and clean.
It shows plain cloth and sheers off well.
It suits soft cloth. Heavy or stiff cloth does not form wave folds well.
Light and privacy
A blockout wave curtain stops nearly all light when drawn.
A thin edge of light can show at the sides and the centre. Returns, an overlap at the centre and a track wider than the frame cut it.
A sheer wave curtain lets soft light through.
Fabric and layers
Wave takes 2.0 to 2.8 times the track width in cloth.
For sheer and blockout, each layer has its own track or its own channel on a double track.
The two layers sit about 4 to 10 cm apart at the heading.
A pair meets in the middle, and an overlap arm closes the gap.
What to check at fitting
Wave needs its own wave track, not a pole.
Fixing to the ceiling is recommended, and fixing to the wall is possible.
Makers run the track 15 to 50 cm past the window on each side.
Tell the installer if the window is a bay or a corner.
Cords and child safety
Some wave tracks are drawn by a cord.
Keep any cord at least 1.6 m above the floor and out of a child's reach.
Keep beds, cots and furniture away from the window, so a child cannot climb up to a cord.
Ask your installer how the curtain will be drawn and where any cord ends.
Measuring
Measure the window for a track, step by step.
Sources
Written by Sill from makers' fitting guides and published safety guidance, and last read on 18 October 2026. Sources are listed below.
- Hallis Hudson: How to make a Silent Gliss curtain (PDF)
- Gerster: Newave wave curtain system (PDF)
- Direct Fabrics: Understanding curtain stacking and stack-back
- Tinsmiths: Triple pleats, measuring and fitting
- Curtains Made For Free: Curtain heading information
- Poles and Blinds: Integra Ultraglide fitting instructions (PDF)
- NBS Source: Silent Gliss SG 3840 cord-operated curtain track
- Bargain Blinds: How to measure curtains
- The Interiors Group: How to double track ready-made curtains
- Sleepout Curtains: How to prevent light gaps in blackout curtains
- Ireland's Competition and Consumer Protection Commission: Window blinds
- US Consumer Product Safety Commission: Window coverings safety alert (PDF)
- Sill's notes from fitters' and makers' guides