Lutron Tech Tips – Measuring Roller Shade Height

March 31, 2020

Tech Tips by Erik Wickstrom from Market Share

Measuring Roller Shade Height

How should you be measuring height for shades, exactly?
We measure them from top of the mounting hardware to the bottom of the hembar, when closed.

For an inside mount, this is easy. Top of the window frame to the bottom. For an outside mount, it gets a little trickier. Typically, you’ll need to add the height of the mounting hardware to the height the window’s frame for your overall height measurement. If the shade will be mounted above trim, add the trim height as well.

Here, we are mounting a bare Roller 64 above trim. In this case, I need to measure the height of the window, then add 3” hardware height for universal brackets, 1” spacing, and 3” of trim. In total (red), I need to order my shade 7 inches taller than the glass.

Pocket mounted shades should be measured the same; effectively from the top of the inside of the pocket, down to closed position.

Although bracket options can change the requirements slightly, this chart provides a good idea of the hardware height adder you should be factoring in:

When in doubt, it’s okay on standard roller shade height to round up or add a couple inches extra; the cost is typically minimal. This excess fabric can be adjusted for later by changing the close limit. On the other hand, not enough fabric is a much bigger issue. For shades besides roller, (ie Honeycomb, Horizontal Sheer) exact height measurement is more important and should not be rounded.

You might have heard about the extra fabric on the tube; that our shades are always made a little bit taller than ordered. 1.5 tube circumference wraps, to be exact. This extra fabric is used so that the weight of the fabric is pulling on itself wrapped around the tube, as opposed to pulling on the tape adhesive directly. Intentionally using this extra fabric to compensate for a shade ordered with insufficient height could result in tape giving way over time; a failure cause not covered by warranty. In fact, the only time this extra f