Whether you're planning to mount the blinds inside or outside the window, we've got you covered.
Time 20 to 30 minutes
ComplexityBeginner
CostFree
Introduction
Mounting window blinds is an easy DIY project as long as you measure the space properly. We'll take you step-by-step through the process.
Adding blinds to windows can create subtle and delicate light, eliminate light altogether and give you some privacy. Your needs will inform what type of blinds you want and the best place to mount them.
Typically, if your windows have curtains, you should mount the blinds inside the windowsill. For windows without curtains, mount them outside of the window frame. Each type of blind is measured and mounted differently.
Check out this step-by-step guide to learn how to measure for inside and outside mounting window treatments. But first, some tips:
- Don’t round down — measure to the nearest 1/8-inch;
- Measure the window itself, not the existing blinds (if any);
- When writing your measurements, it’s width, then height (W x H);
- Use a metal measuring tape rather than a cloth one for the most accurate results;
- Once you’ve measured the window frames and chosen the blinds, review the mounting requirements before attempting to install the blinds.
Tools Required
- Tape measure
Project step-by-step (4)
Step 1
How To Measure For Inside Mount Blinds
Measure the width
For width, measure across the top, through the middle and across the bottom of the frame. Go with narrowest measurement. Since the window might not be perfectly straight, measuring in three locations ensures the blinds fit.
Step 2
Measure the height
For height, again measure in three spots: to the left, middle and right side. This time, the longest length will ensure the window is completely covered.
Note: You can shorten window blinds if necessary, but save yourself the hassle by ordering them the correct length.
Step 3
Measure the depth
As with the height, measure the depth of the window in three locations. If the depth is shallow, a mini blind or outside mounting blind may be the best choice.
Step 4
How To Measure For Outside Mount Blinds
Measure the width and height
For these, measure the width and height of the window including the window trim in three locations like above.
- From those measurements, add about three inches to each to ensure light will be properly blocked.
- Outside mounts need to be placed on about two inches of flat surface, which may mean mounting them above the frame. If this is the case, you may need to purchase projection brackets to create space between the frame molding and the blinds.
- Headrails tend to be about 2-1/2-inches tall, so consider the headrail and mounting brackets when thinking about placement and space needed above the window.
