Curtain stackback is the horizontal space occupied by gathered panels when the curtains are fully open. It determines how much glass the open fabric covers and how much side-wall space the layout needs. Plan each panel's resting position before choosing rod or track width. As a starting point, Fredesigner's curtain pages estimate that open panels take up about one-fifth of the width they cover when closed—roughly 20 inches on a 100-inch rod. Header style, fabric, lining and hardware move that number up or down, so treat it as a planning figure.
Draw the open position first
Most shoppers picture curtains closed across the window. For a wide living-room window, start with the opposite view: where do you want the panels to sit when you are enjoying daylight? Sketch the glass, trim, adjacent walls, and anything occupying the sides.
Mark outlets, switches, furniture, and wall corners. A long stretch of wall can look available on paper but be difficult to use when a sofa arm or cabinet presses against the fabric. Leave the actual resting area clear.
Decide what you are willing to cover
If preserving the view is the priority, ask whether the chosen panels and hardware can place most of the open stack beyond the glass. If side wall space is limited, accept that some glass may remain covered or reconsider the treatment layout.
A worked example: a 96-inch-wide window with a center-opening pair. Fredesigner's drapery measuring guide suggests extending the rod 6–15 inches beyond each side; at 12 inches per side, the rod is 120 inches. With curtains covering all 120 inches, the stack is about 24 inches—12 inches per side—so the open panels sit just beside the glass. Cut the extension to 6 inches per side and the rod is 108 inches: each stack is then about 11 inches, so about 5 inches of it lands on the window.
Do not simply order narrower panels to make them disappear. Width still has to support the intended closed coverage and the requirements of the header. Solving the open position by compromising the closed position creates a different problem.
What affects curtain stackback?
- Header: sewn pleats, rings, and other top treatments arrange the fabric differently.
- Fabric and lining: a layered panel may gather differently from a lighter unlined one.
- Opening direction: two stacks split the fabric between the sides; a one-sided opening concentrates it.
- Hardware: supports, stops, and the chosen carrier or ring system can affect travel.
Use the header-style guide to identify your intended top treatment. Ask the hardware supplier how the selected arrangement moves past supports; do not assume every ring can travel across every bracket.
Ask for an estimate tied to your order
Heavier linings and some headers stack deeper than the one-fifth estimate. When reviewing Sedona Linen Blend Drapery Soft Top, a 350 gsm fabric, give support the proposed finished panel widths, selected header and liner, opening direction, and available side wall space, and ask them to confirm the stack for that combination.
If you plan to keep curtains open most of the day, explain that priority. If you close them every evening, also check the center meeting point and side coverage. Both positions should work before the rod location is final.
Then measure the confirmed layout
Follow the drapery measuring guide after deciding the hardware position and panel arrangement. Save the open-position sketch with your measurements so the reason for the chosen width remains clear.
Compare fabrics in the Linen Curtains collection with the complete layout in mind. A well-planned stack is not necessarily the smallest one; it is one that preserves the view you want without compromising how the curtains close.
