With or without draperies, window blinds offer light control, privacy, and beauty to any room. It's critical to measure accurately for inside-mount blinds. We'll tell you how.
Difficulty: Easy
Time Required: Varied
Here's How:
- For an "inside mount blind" you must determine if there's enough room to install a blind and its heading in the window opening. If the edge of the window is flush with the wall, you'll need to use an "outside mount" blind.
- Measure the width of the window opening in 3 places--at the top, in the middle, and along the bottom edge or sill. Use the measurement to within 1/8 inch. You'll use the narrowest of these three measurements for your inside-mount blind width.
- Measure the height of the window opening in 3 different places--along the left side, in the middle, and along the right side. Use the measurement to within 1/8 inch. You'll use the longest of these measurements for your inside-mount blind length.
Tips:
- Always measure to the nearest 1/8 of an inch. Do not round the measurement up or down.
- When writing the measurement, list the width first, then the height. The proper measurement would be "width X height."
- If you are not sure about how to make accurate measurements, you'll want to pay to have someone from the blind company come to your home to measure.
- If you provide your own measurements, you'll be responsible if the blinds do not fit. Blinds are custom items and must be perfect to look right.
What You Need:
- Steel measuring tape
- Paper and pencil
- A ladder or step stool if the window is high

