Key takeaways
- Compare shared and stepped curtain-top lines for windows at different heights, with a wall elevation and clear hardware questions before ordering.
What's inside
Plan curtains for two windows at different heights by deciding which horizontal line the room should share. The window heads can remain visibly different while the curtain tops align, or each treatment can follow its own window. Neither arrangement is automatically correct: the useful choice depends on the wall, available mounting positions and whether both curtains need to close.
Draw the two windows together before ordering separate pairs. A decision made from one window at a time can produce a mismatched wall even when every individual measurement is accurate. Start with the intended appearance, then ask the supplier to translate that plan into compatible hardware and finished panels.
Record the wall as one elevation
An elevation is a straight-on sketch of the wall. Give the windows simple names, such as left and right. Include their outer trim, the ceiling line, adjacent walls, furniture and any feature that limits where a treatment can sit. Mark window-head heights from one shared reference rather than measuring upward from two potentially different points.
Record the head-height difference explicitly. If the left head is 210 centimeters above your reference and the right is 224 centimeters, the difference is 14 centimeters. These are fictional measurements for explaining the method, not recommended window or rod heights. Keep the original observations alongside the sketch so someone else can reconstruct the comparison.
Separate observed features from proposed lines. Use one pencil style for existing trim and another for possible curtain tops. A proposed mounting line is not confirmation that the wall or ceiling can support the chosen hardware there; that requires the appropriate installation assessment.
Compare three alignment choices
| Arrangement | What repeats across the wall | What to inspect before choosing |
|---|---|---|
| One shared curtain-top line | The treatments begin at the same level | Different gaps above the window heads and available support positions |
| Each treatment follows its window | The relationship between treatment and local trim | The visible step between treatments and nearby architectural lines |
| Different treatment types | A selected color or material connection | Whether each opening retains its required operation and coverage |
A common top line can make the treatments read as a pair, but it leaves a larger exposed area above the lower window. Following each head can respect the architecture, but emphasizes the height difference. Different treatment types may be appropriate when one opening has a completely different job. Keep that third option available instead of forcing identical panels onto incompatible openings.
Judge open and closed positions separately
Sketch both windows with curtains open, then with them closed. When open, compare how much wall appears above the trim and where the stacked fabric sits. When closed, compare the overall rectangles of fabric and any visible gap between the treatments. The preferred arrangement may change between those views.
Also mark whether the panels are working curtains or stationary decoration. Two decorative side panels do not establish that a window has full closing coverage. Ask the supplier to show the closing position and stack location for each window; do not copy the other window’s order merely because the tops share a line.
Keep hardware height separate from fabric length
The Shade Store’s drapery measuring guide distinguishes the mounting measurement from finished drapery length and gives different hardware deductions for different systems and headings. That is the source-backed point to carry into this plan: matching hardware lines does not by itself specify the correct finished fabric length.
For each opening, record the chosen hardware, heading and supplier’s measuring reference. Ask which visible part will actually align: top of pole, top of track or top of fabric. If two systems differ, an identical mounting measurement may not produce the visual line you intended.
Try the wall composition before placing the order
In the fictional 14-centimeter example, imagine both treatments sharing a proposed top line above the higher window. The lower opening then has 14 centimeters more wall between its head and that line. Represent that difference on a photograph or paper elevation. Look at the whole wall from the usual sofa position, not only directly underneath the curtain rod.
Compare the stepped option on a second copy. Ask each household member to choose between those two specific views and explain the reason. “I want the trim to remain prominent” is more useful than “make it balanced.” Keep the selected drawing with the order so the installer and workroom see the same intention.
Send one coordinated brief
The final brief should name both windows, show their measured heads, identify the chosen alignment line and state which panels must operate. Include unresolved mounting questions and ask the supplier to confirm the finished result before cutting or ordering custom fabric. Treat any later hardware substitution as a reason to recheck the alignment.
If the remaining problem is the lower edge over an uneven floor, use the separate curtain-hem planning guide. Head alignment and floor clearance are connected decisions, but solving one does not automatically settle the other.
