Measuring for blinds

There are a number of options to consider before you start to measure.

What sort of blind do you want?

  • Roman Blind
  • Roller blind
  • Vertical Blind
  • Venetian

Then you will need to decide if you want to fit the blind inside the recess or outside.

Step back from your window and decide if you want to mount the window treatment inside the window recess, or outside on the wall or window frame. We usually recommend an inside recess fitting where possible because it provides a cleaner look.  An inside recess fitting will mean you may be able to add a second treat for emaple curtains or another blind on the outside.

An outside fitting can help to make a window appear larger or hide an unattractive feature. For an inside fitting, the window opening must have enough unobstructed depth to allow installation. When measuring for an outside fitting, be sure to allow for the height of the product’s headrail in your measurements.

Inside recess

Measure the opening width at the top, center, and bottom, recording the narrowest width.  Always measure to the nearest mm, and be sure to use a steel tape measure.

Measure the height left, right and center, recording the tallest height.

When you specify inside the recess, the blind supplier will make your blind slightly narrower than you specified to allow for operating clearance. They will deduct a small amount from the width on each side. The deductions are made so that the blind will not rub or scratch your window frame. Do not make this allowance yourself, provide the exact window opening width.

Outside recess

Measure the opening width. If there is room, add at least 8cm to each side of the window opening for minimum light gap coverage and maximum privacy.

Measure the opening height. Add a minimum of 6cm in height to allow space for mounting brackets above the opening plus enough overlap for the bottom. After determining the measurements that you want the blind to be, hold the tape measure up to your window and visualize what the overall size will look like on that window before proceeding.


Not confident to measure?

If you don’t have the time to measure and install, have hard-to-reach areas, or just don’t want to, MyFitter can measure and install your blinds for you. Simply contact us and we’ll give you a quote.

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