The Complete Handbook of Window Valances & Cornices

Chapter 1: Understanding Window Valances & Cornices

A window valance or cornice is a horizontal structural element mounted above a window opening, typically spanning the full width of the window frame or wall. Its primary function is to conceal the rod, hardware, mounting brackets, and top folds of curtains or shades—elements that are visually distracting and mechanically necessary but not meant to be seen. In this way, a valance is as much an engineering solution as a design choice. It solves a practical problem: how to mount and operate window coverings while maintaining a clean visual line at the top of the window.

The distinction between a valance and a cornice is worth establishing at the outset, because the terms are sometimes used interchangeably but describe different constructions. A valance is typically a soft fabric element—gathered, pleated, or draped—that hangs from a mounting board or rod. It relies on the weight and drape of fabric to achieve its form. A cornice, by contrast, is a hard, rigid structure, usually made of wood, metal, or composite material, with a finished face and a specific geometric shape. Both serve the same concealment function, but they differ in construction, installation method, performance characteristics, and cost. Throughout this handbook, both will be covered as distinct types within the broader category of window top treatments.

To understand why a valance or cornice matters, consider a typical professional window installation. A standard roller shade or curtain rod mounts to the wall or window frame using metal