Choose Your Primary Blind
For square bay windows, you can have either the side blinds or the front blind be the primary blind.
Front Blinds
This style will give you the best coverage across the front window of your bay. Your front blind will span the full width of the bay, overlapping your side blinds.
Side Blinds
This style will give you the best coverage on the side windows of your bay. Your side blinds will span the full width of the bay, overlapping your front blind.
Choose Your Blind Type
The measurements that you need to take will differ depending on the type of blind you’re wanting to install.
Fixing Type & Rail Depth
Make note of your rail depth from the list below for step 2 of the measuring process.
You will also need to decide if you will be installing your blinds inside recess or face fixing.
A rail depth of 75mm for 50mm sized slats.
A 25mm aluminium venetian blind has a rail depth of 30mm.
89mm vertical blinds have a rail depth of 70mm.
Top-fix bracket allowance is 50mm (for blinds up to 2000mm wide), and 70mm (for blinds over 2000mm).
A face fixing bracket is 60mm (for blinds up to 2000mm wide), and 80mm (for blinds over 2000mm).
Note:Because the cloth cover is always narrower than the exact size, unless your bay window has a large corner window frame work, there will be an area of glass that is not fully covered by the blinds. This will be more noticeable when installing blackout blinds.
This applies to all roller blinds.
Measuring for Square Bay Windows with Front Primary Blind
Measure for your square bay window with the front blind spanning the full bay width.
Step 1
Measure the Primary Blind Width
Measure the full width of the bay that is in front of your front windows. This will become your width for your primary blind.
Step 2
Measure the Obstruction Depth
Measure the distance between the window frame and any obstructions, such as handles.
Step 3
Calculate Total Depth
Take the headrail depth of your blind from the list above and add this to your obstruction depth from step 1. This will give you your total depth.
For example, if you’re measuring for Wooden blinds, your depth would be 7.5cm. You would then do 7.5cm + 4cm to get a total depth of 11.5cm.
Step 4
Mark your Total Depth
Mark the total depth of your primary blind on each side of the window bay.
Step 5
Measure the Width
To get the width of the side blinds, measure the distances between the total depth mark and the edge of the window bay. Repeat this step for both sides for accurate readings.
Step 6
Measure the Drop
Take three measurements from the left, middle and right side of your bay window and use the smallest measurement as your drop.
Step 7
Enter your Measurements
Enter the width and height (drop) measurements for each blind. Select ‘inside recess’ as your fitting option. Repeat this for each blind you order.
When you select ‘inside recess’, we will make a small deduction to the width of your blind as to accommodate for the brackets.
Measuring for Square Bay Windows with Side Primary Blinds
Measure for your square bay window with the side blinds spanning the full bay width.
Step 1
Measure the Primary Blind Width
Measure the full width of the bay that is in front of your side windows. This will become your width measurements for your primary blinds.
Step 2
Measure the Obstruction Depth
Measure the distance between the window frame and any obstructions, such as handles.
Step 3
Calculate Total Depth
Take the headrail depth of your blind from the list above and add this to your obstruction depth from step 1. This will give you your total depth.
For example, if you’re measuring for Wooden blinds, your depth would be 7.5cm. You would then do 7.5cm + 4cm to get a total depth of 11.5cm.
Step 4
Mark your Total Depth
Mark the total depth of your primary blind on each side of the window bay.
Step 5
Measure the Width
To get the width of the front blind, measure the distance between the 2 depth marks of the side window blinds.
Step 6
Measure the Drop
Take three measurements from the left, middle and right side of your bay window and use the smallest measurement as your drop.
Step 7
Enter your Measurements
Enter the width and height (drop) measurements for each blind. Select ‘inside recess’ as your fitting option. Repeat this for each blind you order.
Well you select ‘inside recess’, we will make a small deduction to the width of your blind as to accommodate for the brackets.