Learning how to measure for roller shades takes about ten minutes, yet it is the step where most orders go wrong. A shade that is five millimetres too wide will jam. One that is too narrow lets in a bright halo of light around the edges.
The good news is that you only need a steel tape measure, a pencil, and a bit of patience. Here is the process we use, plus the one detail people forget: window depth.
Step One: Decide Inside Mount or Outside Mount
Inside mount sits within the window frame and gives a tidy, built-in look. Outside mount sits on the wall or trim above the window and covers the frame.
When Inside Mount Works
Your frame needs to be deep enough to hold the shade bracket and the rolled-up fabric. In most cases that means at least 5 to 6 cm of clear depth. If you have a crank handle or a protruding lock, the frame needs to be deeper still.
When Outside Mount Is Better
Shallow frames, uneven walls, and windows with trim you want to cover are all good candidates. Outside mount also reduces light gaps, which helps in bedrooms.
Step Two: Measure Width and Height Three Times
Older Toronto homes are rarely perfectly square. A window can be wider at the top than at the bottom by a centimetre or more.
For Inside Mount
Measure the width at the top, middle, and bottom of the frame. Use the narrowest number. Measure the height on the left, centre, and right, and use the tallest number so the shade covers the whole opening.
For Outside Mount
Measure the width you want covered and add at least 5 cm on each side to block light. For height, start where the bracket will sit and measure down past the sill by a few centimetres.
Step Three: Check the Window Depth
This is the detail that trips people up. Window depth is the distance from the glass to the front edge of the frame. Measure at the shallowest point.
If anything sticks out, such as a latch or a handle, measure from the front of it. A shade that cannot clear the hardware will not sit flat, and you will see it every day.
What About Condo Windows?
Condo frames are often shallow, and some have sprinkler lines or ceiling bulkheads nearby. If you are unsure, take a photo and send it to us before ordering. Our team is happy to check it, which is part of the exceptional customer service we aim to give every customer.
Common Mistakes to Avoid
People often round numbers, measure with a cloth tape, or deduct from the measurement themselves. Do not deduct anything. We make the adjustments for fit, so give us the exact measurements.
Write measurements in millimetres if you can. It reduces errors. Label each window with a note such as Kitchen Left or Bedroom Window 2, so nothing gets mixed up when the order arrives.
Why Accuracy Pays Off
Our high-end, quality products are made to your size, so a good measurement means a shade that rolls evenly and lasts for years. Competitive pricing makes custom sizing accessible, and a careful measurement protects your investment.
Frequently Asked Questions
What tools do I need?
A steel tape measure, a pencil, paper, and a ladder if your windows are tall.
Should I measure the glass or the frame?
Measure the frame opening for inside mount. For outside mount, measure the area you want covered.
Can you measure for me?
Yes. Book a consultation and we will take care of it.
What if my window is not square?
Use the narrowest width for inside mount, or switch to outside mount for a cleaner result.
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