You’ve been thinking about your windows. Maybe you’re finally doing something about that room that’s never finished. You’ve looked at fabric samples, scrolled through photos, and now you’ve landed on a decision: you want a top treatment—something to give the window presence, elegance, and a reason to look up.

Now you’re staring at three words—valance, cornice, and swag—and wondering what the difference is.

These terms get used constantly in window design, often interchangeably, and rarely explained.

So here’s a plain-language guide to all three. What they are, what they do, which rooms they suit, and how to choose the right one for your space. By the end, you’ll know exactly what to ask for.

What Is a Valance?

A valance is a fabric panel that hangs across the top of a window. It does not have a structural frame but has soft fabric mounted on a rod or board. It can be gathered and relaxed, sharply pleated, or shaped with a scalloped hem. Because it’s purely fabric, it’s the most versatile of the three: casual or polished, used alone or layered over blinds and curtains.

Best for: Kitchens, casual living rooms, and anywhere you want softness without formality.

What Is a Cornice?

A cornice is a rigid box structure—wood, MDF, or foam—mounted above the window and upholstered in fabric.

Where a valance is soft, a cornice is architectural. It gives the window a finished, intentional look, and it’s especially good at hiding curtain rods, blinds, hardware, or anything you’d rather not see at the top of a window.

Because it’s upholstered, a cornice can be made in any fabric—velvet, linen, or a bold pattern—and shaped with a straight or decorative bottom edge to suit the room.

Best for: Bedrooms, home offices, formal living rooms, and commercial spaces where clean lines matter.

What Is a Swag (and a Jabot)?

A swag is a length of fabric draped across the top of a window in a soft, sweeping arc. It’s almost always paired with jabots—the vertical fabric pieces that hang down on either side, framing the window.

Together, a swag and jabot create one of the most classically elegant window treatments in interior design.

Swags can be formal or relaxed, depending on fabric and drape depth. A swag in heavy silk reads grand; the same silhouette in loosely draped linen reads romantic. They require more fabric and skilled draping, which is why they’re made custom.

Best for: Dining rooms, primary bedrooms, entryways, and spaces with high ceilings where vertical drama can breathe.

Which One Is Right for Your Room?

The honest answer is, it depends on the feeling you want the room to have. Here’s a practical breakdown.

1. If the room is casual and lived-in, go with a valance. Kitchens, breakfast nooks, playrooms, and relaxed living spaces all benefit from the softness and informality of fabric. A gathered valance in a cheerful cotton or a tailored linen valance over your kitchen sink will feel exactly right without trying too hard. 
2. If the room is meant to feel polished and purposeful, go with a cornice. Home offices, formal living rooms, master bedrooms, and commercial spaces respond well to the clean lines and architectural quality of an upholstered cornice. It signals intention. It says the room was designed, not just decorated. 
3. If the room deserves a moment of drama, go with a swag. Dining rooms, primary bedrooms, and formal sitting rooms are natural homes for a swag treatment. If you have beautiful hardware, high ceilings, or simply a window you’ve always wanted to make more of, a swag will do it.

Can You Layer Them?

A layered window treatment: a cornice board at the top with sheer panels below, or a swag over Roman shades. This shows the ‘layered’ concept visually. Search stock: ‘cornice with curtain panels layered window treatment’ or ‘swag over roman shade window.’

Yes—and it usually looks better. A cornice over blackout blinds is one of the most practical and polished combinations there is: the blinds handle the light, and the cornice hides all the hardware.

A swag over sheer panels adds softness without heaviness. A valance over blinds is the simplest version of layering, and it works in almost any room.

The key is proportion—the top treatment should conceal the hardware without crowding the window.

Custom Window Treatments in Herndon, VA

At Designs & Interiors by The Upholstery Shop, we make all three—custom, from our Herndon workroom.

The process is straightforward: we talk through the room, you choose from over 200 fabric options in our showroom, we measure, we make, and we install.

No guesswork. No online ordering, and hoping it fits.

We’ve been doing this since 1977, and the part that hasn’t changed is this: we don’t tell you what you want.

We help you figure out what’s right for your space—and then we build it.

Not sure which treatment is right for your windows? Make an appointment and stop by our showroom, we’ll show you samples of each in actual fabric, so you can see exactly what it’ll feel like in your home. 

📍 757 Elden Street, Herndon, VA     

📞 703-471-9390 

Open Mon–Fri 10 am–4 pm |  Sat 10 am–3 pm | Closed Sunday