How to Measure Your Windows for Perfect Fitting Blinds
Why Precision is Essential for Custom Blinds
Because custom blinds are built to your exact window dimensions, even a fraction of an inch error can prevent the blind from fitting inside your frame or cause light leaks. Before ordering, always use a steel measuring tape—never a soft fabric ruler—and measure to the nearest 1/8th of an inch.
How to Measure for Inside Mount Blinds
Inside mount blinds fit neatly inside the window recess. Measure the exact width of the window opening in three places: top, middle, and bottom. Write down the narrowest width. Next, measure the height in three places: left, middle, and right, and record the tallest measurement. Check your window depth to ensure there is enough space for the headrail.
How to Measure for Outside Mount Blinds
Outside mount blinds are mounted on the wall or trim above the window. First, measure the exact width of the window opening and add 3 to 4 inches on each side to ensure full light blockage. Then, measure the height from where you want the headrail to sit down to the windowsill, adding 2 to 3 inches of overlap at the top.
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