By the Sill Shade workroom team — sliding doors are just very wide windows that people walk through, and that one difference changes every measurement.
Curtains for a sliding glass door should be floor length, hemmed to float about half an inch above the floor — never touching, never puddling. The panels have to travel across a door you use daily, and any fabric resting on the floor will catch under your feet or the door track within a week. For a standard 80-inch door with the rod mounted 4 to 6 inches above the frame, that means 95-inch panels hemmed to fit.
The Length Rule
| Door height | Rod height | Panel length to buy | Hem to |
|---|---|---|---|
| 80″ (standard) | 84–86″ | 95″ | Half an inch off the floor |
| 96″ (8-foot door) | 100–102″ | 108″ | Half an inch off the floor |
| Door to ceiling | 2–3″ below ceiling | Custom | Half an inch off the floor |
Why float rather than kiss the floor? Because a slider is traffic. A kissing hem drags every time you open the panel, picks up dirt from the track, and frays at the leading edge. Save the kissing and puddled hems for stationary panels on ordinary windows — the reasoning is in our curtain lengths guide.
Width Matters More Than on a Window
The mistake we see constantly: the rod is exactly the width of the door. When the curtains open, the fabric stacks over the glass, and now half the door you paid for is covered. Prefer a hard covering instead? Vertical and panel-track options are compared in our guide to the types of blinds.
Extend the rod 12 to 18 inches past the frame on the side where the panels will stack — more than a normal window, because there is more fabric to park. If panels stack on both sides, extend both. That extra foot and a half of wall is the difference between a door that reads as a wall of light and one that feels curtained-in.
Total fabric width still needs to be 2 to 2.5 times the full rod length. A 72-inch door with a rod extended to 100 inches needs 200 to 250 inches of panel — usually three or four panels, not two. See our measuring guide for the full calculation.
One-Way or Two-Way Draw?
One-way draw stacks all the fabric on a single side. Best when the door opens from one side only, or when there is wall on one side and none on the other. Ask for a one-way draw rod, or simply hang all panels on one half of a standard rod.
Two-way (center) draw splits the fabric to both sides. Looks more symmetrical, and each side has less bulk to stack. This is our default when there is wall on both sides.
Whichever you choose, make sure the stack does not block the handle or the door’s travel path.
Best Header Styles for a Slider
You will open these panels every day, so glide is not optional:
- Grommet — the best glide of any header, and the one we recommend most for sliders.
- Ring clips or pinch pleat on rings — excellent glide, more tailored look, slightly more expensive.
- Back tab — clean flat folds, acceptable glide.
- Avoid rod pocket and tab top — both drag on the rod. Fine for a stationary window, miserable on a door.
Full comparison in our guide to the types of curtains.
Hardware Notes
A slider rod is long and usually carries heavy fabric. Use a rod at least 1 to 1.25 inches in diameter, and put a center support bracket on any span over 60 inches — non-negotiable with lined or blackout panels. Anchor into studs where you can; where you cannot, use toggle bolts rated for the weight, not plastic plugs.
If the door is your main light source and you want daytime privacy without darkness, layer: a sheer panel behind, a lined panel in front. Both travel on the same rod with a double bracket set.
4 Sliding Door Mistakes
- Hem touching the floor. It will drag, catch, and dirty within days.
- Rod the same width as the door. Open panels then cover the glass permanently.
- Two panels on a wide door. Not enough fullness — the panels look stretched and stack into a fat lump.
- Rod-pocket panels. They will not slide, and you will stop opening the curtain entirely.
Stack-Back Math: Making Panels Clear the Door
The number that decides whether a slider works day to day is the stack — how much wall the open curtain occupies. Fabric at proper two-times fullness stacks back to roughly a fifth of the width it covers. In practice:
| Glass width | Stack per side (pair) | Rod length to clear the glass |
|---|---|---|
| 60″ | ~7–9″ | ~76–80″ |
| 72″ | ~8–10″ | ~90–94″ |
| 96″ | ~10–13″ | ~118–124″ |
| 120″ | ~13–16″ | ~148–154″ |
If the wall beside the door is shorter than the stack, the curtain will always hang over the glass — that is the moment to switch to a one-way draw toward the fixed pane, or to a ceiling track that can run past the architrave.
One Panel or a Pair?
A single panel drawing one way, toward the fixed side of the door, keeps the walkway clear and stacks everything over glass that never opens — it is what we fit on most sliders. A pair splitting in the middle looks symmetrical in photos but puts the join exactly where people walk; choose it only when the door’s slide direction varies or the room demands symmetry.
Sliding Door Curtain FAQ
What length curtains for a sliding glass door?
Floor length, hemmed to float about half an inch above the floor. For a standard 80-inch door with the rod 4 to 6 inches above the frame, buy 95-inch panels and hem as needed.
Should curtains touch the floor on a sliding door?
No. Unlike a stationary window panel, slider curtains move daily — a floating hem keeps them clean and prevents catching in the track.
How wide should the curtain rod be for a sliding door?
12 to 18 inches wider than the frame on each side you plan to stack fabric, so open panels clear the glass entirely.
How many curtain panels for a sliding glass door?
Usually three or four. Total panel width should be 2 to 2.5 times the rod length, and a slider rod is long.
Can I use vertical blinds and curtains together on a slider?
Yes — mount the curtain rod outside and above the blind headrail. Details in our guide to hanging curtains over vertical blinds.
Related: curtain lengths guide · how to hang curtains · how to measure curtains · all curtain guides