How To Measure Bay Windows For Blinds

Measuring for Bay Window Blinds: How To

Angled bay window or square box bay window, The Online Blind Company are here to help you get the perfect measurement and fit for your new blinds. When measuring for bay windows the process is slightly different depending on what style of blind you want to hang in your bay window.

This guide hopefully makes measuring for your bay window easy and hassle free however if you do need some help, give us a call on 0800 246 1077 or send us a message using the form on our contact page.

 

 

To get started measuring for your bay window blinds, you will need:

  • A pencil
  • A metal tape measure
  • x2 pieces of A4 or A5 paper or card – for your template
  • A ruler

First, choose your blind type

The first thing to do is to choose your blind type, whether it’s a roller blind, vertical blind, wooden venetian blind, faux wood blind or aluminium blind.

Roller binds

You need to decide whether you will be fixing the blind to the roof or to the face of the window as this determines your allowances when measuring.

Blind Width Top Fix Bracket Depth
Roller Blind under 200cm wide 50mm
Roller blind over 200cm wide 70mm

 

Blind Width Face Fix Bracket Depth
Roller Blind under 200cm wide 60mm
Roller blind over 200cm wide 80mm

Faux wood venetian blinds & Wooden blinds

For both faux wood venetian blinds and wooden venetian blinds, you will need to decide on what slat width you want to use, from there you can use the table below to find your rail depth.

Slat Width Rail Depth
35mm Slat Width 65mm
50mm Slat Width 70mm

Vertical blinds

With vertical blinds, be careful when adjusting your measurements – don’t forget the slats have to be able to rotate. Typically fitted to the roof however can be face fixed.

Slat Width Rail Depth
35mm Slat Width 65mm

Metal Venetian blinds

Metal Venetian blinds, like vertical blinds, are typically fixed to the roof however can be face fixed.

Slat Width Rail Depth
25mm Slat Width 30mm

 

Step 2. Measuring

Measuring for Square bay windows

With square/box bay windows you should first measure the widths of all 3 sides. You then have two options:

  • Subtract the rail depth of both side windows from window A to get the blind size of window A (Example: A – (C rail depth + B rail depth) = Size A). See Below:
    You should order your blinds as recess fitting for this style of window.
  • Subtract the rail depth of window A from both side windows to get the blind size of windows B and C (Example: (C-A rail depth) = C and (B-A rail depth)= B). See Below:
    You should order your blinds as recess fitting for this style of window.

NB: For all products and in both options above you will need to make further allowances for any protruding handles or other obstructions, that will interfere with the use of the blind. Add the measurement of the protrusion onto the rail depth size given above. For Example: A handle protrudes 20mm plus 70mm for a 50mm slat width option, this requires a total deduction of 90mm to be made.

Measuring the drop/height: For both of the above options, you just need to measure from the top of where the blind will be fitted normally the underside of the ceiling, to the window sill or wherever you wish the blinds to hang down to. The drop will be recess size and we will deduct our standard clearance allowance from your given size.

Measuring for angled bay blinds

The different blind type rail depths given above are referred to as measurement ‘A’  below.
How to measure for angled bay windows

Once you have found your measurement ‘A’, you can correctly measure the width of blinds needed for your angled bay window, together with the drop length you require. Be sure to check every measurement twice!

Step one: Getting your angles
Using two pieces of card or paper align them so that their shortest edges are parallel to each other, and mark both of them with measurement A. Place these two pieces of paper on the window sill up against your frame, one on the left side and one on the right of the angle and slide them towards each other until the marks you made on the papers meet each other like below:

Step two: Marking the window sill

Using a pencil, lightly mark (so you can rub it off) the window sill or frame where each short edge ends nearest to where the windows panel meet. This will leave you with two marks on your frame or window sill, one either side of the ‘corner’ in the bay window. Now do this for the other windows panels.

Step three: Measuring the width
Using the edge of the window and the marks you’ve just made as your guide, measure the distance between the three separate sections (typically one larger, two smaller). This will be the width of the blinds that you need to order. Make a note of these measurements, and be sure to double check them. These will be your recess measurements.

Step four: Measuring the drop
Measuring the drop: For both options, you simply measure from the top of where the blind will be fitted normally the underside of the ceiling, to the window sill or wherever you wish the blinds to hang to. The drop will be recess size and we will deduct our standard clearance allowance from your given size.

By now, you’ll have all the measurements you need to order blinds for your angle bay window – just remember to order blinds for fitting into the recess.
Questions?

If you have any questions about how to fit your blinds why not give our customer services team a call on 0800 246 1077 or send us a message using the form on our contact page.

 

 

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