Best Window Treatments for Arched Windows

Updated: 10/02/2026 | 7 min read
The short answer

The best window treatments for arched windows depend on how much of the window you want to cover. Drapery mounted above the arch can cover the entire opening. Roman shades, cellular shades, or blinds mounted below the curve can provide privacy across the rectangular portion while leaving the arch visible. A covering that follows the curve requires a specialty product and careful measurement.

Book a free design consultation and see samples in your own space before you decide.

An arch brings something special to a room. Your window treatment should make that architectural detail feel intentional while giving you the light control you need. Before choosing a fabric, decide whether that beautiful curve should stay on display all day or disappear behind a treatment when you want privacy.

Should You Cover the Arch or Leave It Open?

Think about the room at its most challenging time of day. In a living room, an uncovered arch may add welcome light. Above a bedroom window, the same opening may let in early-morning sun even when the shade below it is closed.

There are three useful approaches:

Leave the arch uncovered

Treat the rectangular window below it. This preserves the shape and works when light through the upper glass is welcome.

Cover the entire window from above

Drapery on a rod or track can extend across the arch and the lower window for more complete coverage.

Investigate a specialty arched covering

Availability, fixed versus operable designs, and fit depend on the window and product. A rectangular shade is not automatically an arch-shaped shade because it is custom-sized.

If the arch is separate from the lower window, the dividing trim may provide a natural mounting location. If it is one continuous opening, have the mounting surface evaluated before settling on a design.

Drapery for Full Coverage and a Softer Silhouette

Custom drapery is a versatile choice when you want to cover an arched window from top to bottom. Mounting above the highest point allows the panels to close across the full opening. When open, the fabric frames the curve instead of cutting across it.

Plan for the fabric at the sides, too. The space occupied by open drapery is called the stackback. If there is not enough wall space, the panels may cover some glass even when fully open. A designer can balance panel fullness, hardware position, and the amount of view you want to preserve.

Sheer fabric softens daylight and keeps the room airy, but it is not a dependable nighttime privacy solution on its own. For bedrooms or media rooms, discuss a more opaque fabric or lining. Blackout fabric blocks light through the fabric; light can still enter around the top, sides, or center opening.

Ceiling-mounted drapery can be especially effective on tall arched windows when the ceiling and mounting conditions allow it. It gives the eye a continuous line from ceiling to floor and lets the arch remain the focal point when the panels are open.

Roman Shades Below the Curve

Roman shades bring the softness of fabric to a more tailored shape. On an arched window, a rectangular Roman shade can sit below the curve and cover the lower glass.

This is a lovely option for a dining room or sitting area where you want privacy without losing light from above. A simple fabric can echo the room’s wall color, while a pattern can connect the window to pillows, upholstery, or artwork.

Remember that a Roman shade gathers into folds when raised. Those folds take up space. Check how much lower glass they will cover and whether the shade will interfere with a handle or opening sash. If you need darkness throughout the entire window, leaving the arch open will not meet that goal.

Cellular Shades for the Lower Window

Cellular shades offer a quieter visual profile. Their folded fabric can suit a room where the window shape already provides plenty of detail.

For a standard rectangular cellular shade, the practical approach is usually to cover the rectangular section below the arch. Check the selected product’s mounting requirements and available controls. An inside mount can reveal attractive trim, but it still requires clearance and may leave light gaps at the edges.

If your goal is to cover the curved glass itself, ask specifically about specialty-shape availability. Do not assume that a standard lift system, top-down/bottom-up option, or rectangular shade can operate within an arch.

What About Blinds and Shutters for Arched Windows?

Wood blinds can complement traditional interiors when installed across a suitable rectangular portion of the window. Their horizontal slats offer a different look from soft shades and allow you to adjust the angle of incoming light.

Shutters are another category homeowners consider for curved windows, but Stoneside does not offer shutters. If you are comparing shutters with shades or drapery, separate the questions of appearance, full-arch coverage, and how much of the treatment needs to open. They are different products with different installation requirements.

Planning a treatment for an arched window?

Bring us a photo of the full wall. Our designers assess the mounting surface, compare coverage options, and measure the opening themselves.

How to Plan Window Treatments for a Large Arch

Start with a photo of the full wall, not just a close-up of the glass. Nearby doors, ceiling height, furniture, and wall space all influence the design.

During your consultation, explain when glare occurs, whether neighbors can see into the room, and whether the window opens. For paired arches, consider a consistent mounting height so the treatments feel connected. For one dramatic arch, a simpler fabric or hardware finish may give the architecture room to shine.

Bring Out the Best in Your Arched Windows

Stoneside’s designers can help you compare fabrics, mounting approaches, and light-control options in your own space. Schedule a free design consultation to create a window treatment that works with your architecture and the way you use the room.

Free in-home consultation. No obligation. We do the design, measure, and install.

Arched Window Treatment Questions

Can you hang curtains above an arched window?

Yes, where the wall or ceiling can support suitable hardware. Hanging drapery above the arch allows it to cover the full opening. The rod or track width and panel stackback determine how much of the window remains visible when the fabric is open.

How do you darken a bedroom with an arched window?

Plan to cover the curved glass as well as the rectangular section. Opaque or blackout-lined drapery above the arch is one approach to discuss. Review perimeter gaps and overlapping panels rather than relying on the fabric label alone.

Can you keep the arch visible and still have privacy?

Often, yes. A shade below the curve can cover the lower glass while leaving the upper arch exposed. Whether that provides enough privacy depends on the window’s height and the sightlines from outside.