Choosing the Right Top Treatment for Your Window Type

Top treatments do more than decorate a window — they frame it, add height, and finish the entire look. But not every top treatment works for every window. To get a custom, designer-quality result, it’s important to match the style with the window type.

Different window types call for different top treatments - from arched valances to tailored cornices, these styles enhance both function and elegance.

In this post, we’ll walk you through choosing the right top treatment for your window type - from rectangular to arched, bay, and beyond.

Choosing the Right Top Treatment for Your Window Type - Room by Room and Shape by Shape

1 - Standard Rectangular Windows

These are the most common window type and the most versatile when it comes to top treatments.

Best Top Treatments:

• Flat or pleated valances

• Boxed cornices

• Swags with cascades for traditional styles

Design Tip:

Add height by mounting your top treatment a few inches above the window frame.

2 - Arched or Curved Windows

Arched windows require a top treatment that highlights — not hides — their shape.

Best Top Treatments:

• Custom arched cornices

• Shaped valances that mirror the curve

• Swagged treatments with soft draping

  
  

Design Tip:

Avoid cutting across the arch — let the curve remain visible.

3 - Bay or Bow Windows

These multi-panel windows need flexibility and segmentation to avoid awkward gaps.

Best Top Treatments:

• Individual valances or cornices on each panel

• Continuous soft treatments shaped to the curve

• Stationary side panels with shaped valances above

Design Tip:

Ensure the angles or curves are measured precisely to avoid gapping or crowding.

4 - Wide or Picture Windows

Large windows benefit from top treatments that scale proportionally and manage visual weight.

Best Top Treatments:

• Deep, tailored cornices

• Layered valances with trim

• Centered swags for formality

Design Tip:

Use top treatments to “break up” the length and give the window visual structure.

5 - French Doors or Transom Windows

These aren’t traditional windows — but they still benefit from finishing touches.

Best Top Treatments:

• Slim cornices that clear door swing

• Relaxed valances for softness

• Flat valances for transom windows

Design Tip:

Keep top treatments shallow so as not to interfere with function.

Why It Matters:

Choosing the right top treatment for your window type enhances:

• Visual balance

• Proportion and height

• Functionality (like shade coverage or light filtering)

• Design cohesion in the room

When done well, it’s the final layer that pulls the room together.

Custom Top Treatments at DDCD

At DDCD, we create custom valances, cornices, swags, and shaped treatments to fit any window — whether it’s a standard rectangle or a curved architectural feature.

• Any shape, width, or projection

• Coordinated fabric, lining, and trim

• Templates for complex window shapes

• Designed for both function and finish

Explore Custom Top Treatments

Request a Window Design Consultation

Final Thoughts

When it comes to choosing the right top treatment for your window type, there’s no one-size-fits-all solution. The best results come from designs that work with your window’s shape, proportions, and function — not against them.

Want help getting it just right? Our workroom is ready to craft a treatment that fits like it was always meant to be there.