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  3. How to measure for a bay window

How do I measure for a bay window?

How you can measure for a bay window! Here we cover how to measure for square and angled bay windows. You'll need a pen, piece of paper and a metal tape measure before you start.

Angled Bay Measuring Instructions

  • Step 1
    If you haven’t done so already, order a sample back from us. Not only will you receive samples of your selected fabrics and materials, but you’ll get some handy measuring templates that make measuring for a bay window even more simple. 
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  • Step 2
    Time to check for any obstructions in your window such as handles or air vents. If you do have any obstructions, you’ll need to take these into account. Measure the distance between the front of the window frame and the outer edge of the obstruction. This is shown as ‘A’ in the diagram below. Make a note of this measurement.

step2

  • Step 3
    You will need to add this measurement to the depth of your desired blind. For example, if your installing aluminium blinds, with a head rail depth of 4cm, and your measurement ‘A’ from the diagram above is 3cm, the effective depth of your headrail is now 7cm. So on our guide, you would use the yellow line labelled ‘Wooden Blind – 50mm or Roller Blind under 2m.’
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  • Step 4
    Now you’ve got your effective headrail depth its time to mark your measuring points on your window sill. Lay your measuring guides flat on the window sill against the face of the window frame. Move the two guides towards each other until the two ar- rows (your effective headrail depth) meet.

step4

  • Step 5
    With the two measuring templates touching, you’ll need to make a small pencil mark on the window sill where the edge of the measuring template meets your window frame. You now have your first measuring point. Repeat this step for all angles in your bay. For the windows on the outer edge of the bay simply mark where you’d like your blinds to stop.
step5


  • Step 6 
    Now you have your measuring points, it’s time to measure the distance between them. This will give you the width of the blind you need to order. Repeat this step for all windows.
step6


  • Step 7
    Now, measure the length of your windows. We recommend taking three measurements to ensure accuracy. Make note of the smallest measurement. You’ll use this number for the ‘drop’ when ordering your blinds.
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  • Let's order!
    Now you’ve got your measurements you’re ready to place your order. When ordering your blinds, we recommend selecting the ‘recess’ option. When this option is selected we will make a small deduction from the width to ensure a snug, yet easy fit.
    If you’d prefer to make a small deduction from the width yourself (we recommend 1.2cm) then do so and order your blinds as Bracket to Bracket or Exact size - depend- ing on the product you’re ordering.

Square Bay Measuring Instructions

Option 1.

Use these instructions if you want the front of the bay window, usually the largest window in the bay, to span the entire width of the bay, and the two return blinds to over-lap the large one. This is the most popular way to install in a square bay as it provides maximum coverage from front on.
It’s important to note, some blinds have a minimum width, so make sure the smaller return blinds on either side exceed the minimum width of your chosen blind style. The minimum width is listed on each product page.

  • Step 1
    Measure the total width of the front bay window, usually this is the largest window in the bay, shown as ‘A’ in the diagram below. Measure to the nearest millimetre. Make a note of this measurement as you’ll use this measurement as your width when ordering your new blind.
square_1

  • Step 2
    If you have handles on your bay window you’ll need to account for how much they protrude. Measure out the distance of your handle, air vent or any other obstruction from the window frame. Make a note of this measurement, shown a ‘B’ below.
square_2

  • Step 3
    Now combine the depth of the blind and the handles you've just measured for, measure this distance away from the main window and mark this point. This combined distance is shown as 'C' on the diagram. 
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  • Step 4
    Measure from the pencil mark you’ve just made to where the you would like the blind to finish, shown as ‘D’ in the diagram below. This is the width of your ‘return’ blind. Make sure you measure both sides, as the sizes may be slightly different.
square4

  • Step 5
    Now, measure the length of your windows. We recommend taking three measurements to ensure accuracy. Make note of the smallest measurement. You’ll use this number for the ‘drop’ when ordering your blinds.
step7

  • Let's order!
    Now you’ve got your measurements you’re ready to place your order. When ordering your blinds, we recommend selecting the ‘recess’ option. When this option is selected we will make a small deduction from the width to ensure a snug, yet easy fit.
    If you’d prefer to make a small deduction from the width yourself (we recommend 1.2cm) then do so and order your blinds as Bracket to Bracket or Exact size - depending on the product you’re ordering

Option 2.

Use these instructions if you want the two side windows in a square bay to span the full width of the side window returns and for the large, front bay window, to sit between them. This is usually used when the side windows are very narrow and we can not manufacture blinds small enough. The minimum width of each blind is listed on the product pages.

  • Step 1
    Measure the total width of the side bay windows into the corner of the frame, usually these are the smallest in a square bay window, shown as A in the diagram below. Measure to the nearest millimetre. Make a note of this measurement as you’ll use this measurement as your width when ordering your blind new blind.
option2

  • Step 2
    If you have handles on your bay window you’ll need to account for how much they protrude. Measure out the distance your handle, air vent or any other obstruction extends out from the window frame. Make a note of this measurement, shown a ‘B’ below.

option2.1

  • Step 3
    Add the depth of the handle or obstruction ‘B’ (if you have one) to the headrail depth of your chosen blind (refer to the table at the bottom of this page), this will form measurement ‘C’ below. Mark this location with a pencil. You should now have two pencil marks, one on the left of the bay window and one on the right. These are the starting and finishing points of the front window blind.
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  • Step 4

Measure the distance between the two pencil marks you’ve just made, shown as ‘D’ in the diagram below. This measurement is the width of your new front window blind.

2.4

  • Step 5
    Now, measure the length of your windows. We recommend taking three measurements to ensure accuracy. Make note of the smallest measurement. You’ll use this number for the ‘drop’ when ordering your blinds.
step7

  • Let's order!
    Now you’ve got your measurements you’re ready to place your order. When ordering your blinds, we recommend selecting the ‘recess’ option. When this option is selected we will make a small deduction from the width to ensure a snug, yet easy fit.
    If you’d prefer to make a small deduction from the width yourself (we recommend 1.2cm) then do so and order your blinds as Bracket to Bracket or Exact size - depending on the product you’re ordering