How to measure a window for blinds & shades

If you’ve decided to install window blinds or shades there are a few preparatory tasks you’ll need to perform to ensure that they fit properly following installation. Taking accurate measurements is the most important, irrespective of whether you’ve chosen roller blinds, venetian blinds, vertical blinds or roman blinds. A bad installation is going to look fairly obvious, given that your blinds are going to be one of the room’s focal points. Here’s a brief guide on how to ensure an accurate installation.

To begin with, you’ll need to check if your window has a recess and then decide if the blind or shade should fit inside or outside of this space. Also, make sure that there’s nothing that will get in the way such as wall fixtures or protruding handles. The deeper the recess, the smaller the chance that things like this will cause an obstruction. You’ll also have an opportunity of fitting your blind/shade snugly and neatly inside of the space. However, should your window have a shallow recess carry out the installation on the outside.

Once you’ve decided on how best to approach the installation it’s time to take measurements. Use a metal tape measure as cloth tapes are not accurate enough. When measuring the width, use three points in case the window recess has inconsistent dimensions. Take your measurements at each end and in the middle, using the narrowest measurement as a guide. In most cases, it’s good practice to reduce the recorded width by around 1cm for a smooth extension.

With length measurements, use the same approach as you did when recording the width. Identify three points at the top of the recess and measure down to the windowsill, making note of the narrowest distance. Again, reduce the length by 1cm so that the blind/shade’s fabric doesn’t catch.

For windows without a recess, measure the width of the window and add an extra 7-10cm so that there’s a degree of overlap. This will guard against annoying shards of light which may slip through and will ensure that it’s blocked out properly when required. For roller blinds add another 5cm to account for its operating mechanism. Then decide how far you want your chosen window-dressing to hang by measuring the length of the window from the top to your desired hanging point.

If your window has rather unconventional dimensions, ready-made blinds might not fit that well. However all is not lost! Buy a blind with slightly longer dimensions than your chosen window and trim it down to size. Most ready-made products include a guide on how to do this. Alternatively seek out a specialist like us, who can provide you with made-to-measure blinds or shades. This is often the best way to go and guarantees that your window-dressing will fit properly.

Hopefully the above pointers will help you to install your blind or shade properly. Measurement is one of, if not the most important stages of a successful window-dressing installation.

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