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How to Measure Venetian Window Blinds

//How to Measure Venetian Window Blinds

How to Measure Venetian Window Blinds

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How to Measure Venetian Window Blinds


There are a number of things you need to consider when measuring for new blinds. Below is a quick guide to help you. Firstly make sure you have a pencil and some paper and a tape measure (preferably a metal one).

What to measure in…

Always measure in millimetres (mm) as most blind suppliers require a size in millimetres.

Where to measure…

In normal window areas there are 2 potential places for your blinds to be installed, these are known as the window face, or the window recess. All Venetian Blinds can be fitted to the face of your window frame or wall, or into the top of the window recess. This gives you complete control over the positioning of your blind.

For a recess measurement:

Make sure you have enough depth to mount the Venetian Blind inside the window frame area. 50mm should be fine; any less will result in the blind protruding out of the recess. If you have less than 50mm it may be worth considering installing your blind outside the window recess as a face fit.

  1. Measure the width of the recess from wall to wall at the top. This is where the brackets will be fitted. Be sure to measure across 3 areas of the width to ensure the area is the same width (or very similar) and the walls do not have bulges that will affect the operation of the blind
  2. Note down the shortest measurement
  3. Take off 10mm each side – this will give you some flexibility in case of any variants in your walls and will ensure your blind doesn’t get damaged when operated. If you want to cover the total window area we suggest you fit your blind to the window face
  4. Measure the drop by taking the measurement from the top of the recess to the bottom
  5. Note down the measurement

For a face measurement:

  1. Measure the exact width of where you’d like your blind to be. As a guide, add an overlap from the window frame of between 50mm and 100mm, this will help reduce the gap at the side of the blind, providing better light control and more privacy
  2. Note down the measurement
  3. Measure the drop from the top of where you want your blind positioned to the bottom
  4. Note down the measurement

And remember…

  • Ensure that on all recess width measurements that you have deducted 10mm from each side
  • Measure at least twice to make sure there are no errors
  • Note the side you wish the controls to be so that they are easily accessed
  • To be sure of a great fit it is important that when measuring you account for any obstructions like window handles
  • For full-length windows we recommend that you measure to approx 20mm off the floor. This will give enough clearance and allow the base rail to move freely
  • For face fit installations remember to raise the blind by 250mm above the frame to allow the Venetian Blind mechanism to clear as much glass as possible when raised. This will allow more light into the room and is important when blinds are on doors, to allow for clearance

Other installation considerations

Shallow sill depth (recess fitting):

Around 50mm minimum sill depth is required to fasten all brackets as the minimum depth necessary for a flush mount (where the product does not protrude into the room). If your sill depth does not cover this you should probably consider a face fit installation.

Corner windows:

When two Venetian Blinds meet in a corner or in a corner where there is only glass, there can be a privacy problem. That’s due to a gap where the products fit together. In order to minimize the problem, consider making one product bypass the other, then specify the other product to fit flush into the first.

It is important to consider the side your controls are on when specifying Venetian Blinds for corner windows. Make sure you do not block the control mechanism with the overlap.

French doors and sliding doors:

Venetian Blinds are not the best solution for installation over French Doors and Sliding Doors. When raised Venetian Blinds leave a stack of slats which fall down between 50 and 250mm depending on the length of the blind. If you want to keep the full door area cleared when the blind is raised then the blind needs to be specified wider and taller. You will need a minimum of 50mm (width) x 250mm (drop) additional space per Venetian Blind for the mounting brackets at the top. This higher and wider measurement means that when the Venetian Blind is raised it blocks less of your view and space to move in and out of the door.

We recommend you consider Roller Blinds for installation over French or Sliding Doors. Roller Blinds have less depth when raised than Venetian Blinds. However this is your choice, by no means does this mean you cannot install Venetian Blinds.

Venetian Blinds can be installed on either a wood or metal doors. For metal doors, you’ll need “metal screws” designed for attaching to metal doors.

By | 2017-12-21T18:14:14+00:00 January 29th, 2017|Blinds|4 Comments


  1. Anna 13th March 2017 at 2:32 pm - Reply

    Great service ,well organised ,clean work,

    • Michal Wedler 13th March 2017 at 6:31 pm - Reply

      Thank you Anna 🙂 It’s my pleasure 🙂

  2. Thomas 21st March 2017 at 9:13 pm - Reply

    Great information. Thank you so much

  3. Meredith 7th April 2017 at 1:41 am - Reply

    Michal did a good clean job, excellent service given and right on time. No issues up to date.

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