A roller shade that is a quarter inch off can look like a mistake. It can leave a light gap, rub the frame or hang crooked. The good news is that knowing how to measure for roller shades takes about ten minutes and a metal tape measure.
This guide walks you through both mount types and the errors we see most often.
Step One: Choose Inside or Outside Mount
An inside mount sits within the window frame. It looks clean and shows off your trim. An outside mount sits on the wall or trim above the window. It covers more area and works when the frame is shallow.
When to pick inside mount
Choose it when your window has a deep, square frame and you like the tidy, built-in look. You will need enough depth for the roller to sit without sticking out.
When to pick outside mount
Choose it when the frame is too shallow, crooked or has a handle or crank in the way. It also helps block more light, since the shade overlaps the opening.
How to Measure for an Inside Mount
Use a metal tape, not a cloth one. Cloth stretches, and a stretched tape gives wrong numbers.
Measure the width at the top, middle and bottom of the frame. Write down all three and use the smallest one. Do the same for height, measuring on the left, middle and right, and use the shortest.
Also check the depth. Make sure the frame is deep enough for the shade's bracket and roll. Do not round up. Report the exact number to the nearest eighth of an inch and we will deduct the right clearance for you.
How to Measure for an Outside Mount
Decide how far you want the shade to extend beyond the window. A good starting point is two to three inches on each side, and a few inches above. This overlap blocks light leaks and makes the window look larger.
Measure the full width you want to cover, then the height from the mounting spot to where you want the shade to end, such as the sill or floor.
Common Mistakes to Avoid
First, measuring only once. Windows are rarely perfectly square, so take three readings. Second, forgetting about obstacles like handles, trim or heat vents. Third, rounding up or down instead of writing exact numbers.
If you want certainty, our team offers exceptional customer service with professional measuring, so what arrives fits right the first time. High-end products deserve a precise fit, and our pricing stays competitive.
Frequently Asked Questions
Can I measure myself?
Yes, if you follow the steps above. We can also double-check your numbers before ordering.
How much gap should an inside mount have?
A small clearance is built in so the shade can move freely. We apply the correct deduction when we make it.
What if my windows are different sizes?
Measure each one separately. Don't assume matching windows are identical.
Can roller shades be motorized after install?
Many can be ordered motorized from the start, which is easier than converting later. Ask us during your consultation.
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