Custom Window Coverings for Half Moon Windows

Alexander Blank Fabrics & Design • August 18, 2025

At Alexander Blank Fabrics & Design, our team has seen every type of arched—or half-moon—window. This style has a rectangular or square bottom part and an arch on top. It can be shorter, average height, or tall—we also see them called semi-circle windows, radius windows and arched windows. The interplay between straight lines and curves is a fascinating architectural feature that allows in more light—no wonder these windows garner so much attention.

Hunter Douglas Duette® Cellular Shades with the PowerView® Arch near Lutherville, Maryland (MD)

Half-moon windows also present specific design challenges. Store-bought blinds and shades don’t provide the customization needed to fit these special shapes. At Alexander Blank, we enjoy creating distinctive solutions that maximize your windows’ unique features. Our experience in installation techniques and partnership with Hunter Douglas give us an edge that benefits our clients—and their half-moon windows.

Hunter Douglas Window Coverings for Half-Moon Windows

Hunter Douglas customizes many of their styles for half-moon windows. We’ve selected our favorite ones below, but don’t hesitate to ask about other options.

  • Silhouette® Sheer Shades: This elegant, horizontal window covering has soft, adjustable S-shaped vanes between two sheer fabric panels. The rear sheer panel obscures the view into your home, for daytime privacy; tilt the vanes for light and privacy control. We can upgrade this with Alustra® Collection natural woven fabrics and other enhancements.
  • Duette® Cellular Shades: Half-moon windows are no match for these energy-efficient honeycomb shades. They offer superior insulation properties, and we customize them for half-moon windows. Ask us about options like the dual-layer insulation of Duette® Architella®, and the motorized PowerView® Arch system for smart home automation.
  • Vignette® Roman Shades: This style brings classic elegance to half-moon windows. These treatments operate smoothly and stack neatly for a sophisticated aesthetic. They come in a rolling or stacking Roman shade style; upgrades include The Alustra® Collection of Vignette® and Vignette® Duolite® Shades.
  • NewStyle® Composite Shutters: Here’s a classic, durable window covering for half-moon windows. Made with composite materials, they mimic the look of genuine wood and feature Truemill® dovetail construction and a stunning, low-luster Finetech® finish. We can customize these shutters to follow the shape of the window for a sunburst effect—or they can run horizontally.

Custom Drapes for Half-Moon Windows

You can layer those window coverings for half-moon windows with custom drapery or install the curtains as a standalone design. During a consultation, we’ll show you the fabrics, patterns, and color options sourced from the finest companies around the globe. 

Our exceptionally talented seamstress tailors these custom drapes to different lengths, from shorter for casual looks to floor-lengths that create dramatic statements. Drapes for half-moon windows add texture, color, and visual weight that transforms rooms, creating warmth and sophistication.

Window Treatment Mounting Solutions for Half Moon Windows

The most straightforward approach for mounting drapery and blinds involves mounting a rod above the window’s curved part on the wall. You can use rectangular panels that cover the entire window opening. If you want drapes for half-moon windows, this creates a classic look that frames the shape beautifully. Ceiling mounting is a second option, especially for windows high on the wall.

Installing window coverings for half-moon windows inside the arch is another approach that preserves arch as a decorative focal point that adds character to your decor.

Let your window covering choice determine which option works best for you—and the decision of whether or not you want to preserve the view of your arches.

Operating Systems for Half-Moon Window Coverings

When our clients compare our arched shading styles, we always ask a key question: “Do you want the window treatment to be adjustable or remain stationary?" 

Here’s why that’s important. In certain rooms, light filtering is appropriate because room-darkening isn’t necessary. One example is a central foyer, where a high-up half-moon window lets in considerable brightness. A light-filtering option like Silhouette® Sheer Shades creates a radiant glow and doesn’t need to be adjusted.

On the other hand, a lower half-moon window in a bedroom requires more light-blocking capabilities for a sound night’s sleep. In cases like these, we recommend adjustable styles that open and close. Hunter Douglas can enhance many of them with PowerView® Automation, a motorized system you operate with a remote, app, or voice commands.

We Have Custom Window Coverings for Half Moon Windows

Alexander Blank Fabrics & Design specializes in custom window treatments that celebrate a home's distinctive architectural features. We’re familiar with the challenges of half-moon windows and devise solutions that combine beauty and practicality. Visit our showroom or contact us for a consultation in Lutherville-Timonium and the greater Baltimore Metro area to customize your window treatment designs with a member of our team and explore our collection of custom fabrics, wall coverings, furniture, and more.

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