Angled Bay Window Measuring Guide

See BRACKET IMAGES & SIZES at foot of page.

Standard Window Measuring

Measuring for Conservatory Blinds

Box Bay Windows

Things to consider, and measuring instructions

Are there any obstructions that will hinder the operation or fitting of the headrails?

Is the fixing area clear, with no ridges of PVC is it a flat fixing surface?

If not do you need to make allowances or consider how you will get your fixings?

Do you need to make allowances for dado rails or phone sockets and so on? Is there anything that will hinder or stop the blind from working properly?

Guide for angled bay windows

Once you have chosen the type of blind you want, you have to decide how you are going to mount them.

If you have handles then you will have to top fix them from the ceiling. If you do not have that option then you may have to mount some wood battening the depth of your handles above the window frame. Blinds must be free of handles so you can raise, lower and open them free from obstruction.

Some of our blinds have the option of face fixing and still give handle clearance of up to 45mm. These are listed below.

Image title Standard or Reverse roll fabric.

Blinds that can be provided with face fix extension brackets

  • Roller blinds standard bracket but reverse roll fabric rolls from the front of the barrel, See Fig 7 & 8
  • Vertical blinds 89mm louvers only on a SF 5'' face fix bracket
  • Venetian blinds on a face fix extension bracket.
  • Venetian wood effect on a face fix extension bracket.

Below is all the blind headrail width dimensions for either face fix or top fix applications.

Angle Bay measuring guide fig 3 & 4


Angled bay examples of bracket location.

Pic (1)

Pictures 1 and 2 shows the position of the face fix brackets for roller blinds within an angled bay apex (picture 1 shown near the window cill for measuring purposes only).

Mark your window frame where shown. Red marks indicate where the end of the blind would fall, position just short of the brackets tips touching.

Pic (2)

Picture (3) shows how to adapt some card to replace the brackets for measuring provided from our bracket pictures and chart below. This example is a roller blind and the bracket is 48mm long.

If you reverse roll the blinds on your order, it will provide 4cm handle clearance.

Cut some card to match the size. Where the tips of the card meet in the apex mark where shown. X this will be the ends of the individual blinds. Order as exact possibly allow a little extra for fitting clearances.

Best carried out with some stiff cardboard work out your blind headrail width. Cut two pieces of cardboard to 15cm in length and your required headrail width.

For example, a 35mm slated wooden venetian blind with handles that are 4cm in depth and a headrail of 4.6cm. The card would be cut to 15cm in length by 8.6cm width (seeFig 4).

Place the two pieces of card into the apex of the window frame at the top where the blind headrail will sit. Then move them together until the two corners meet. Mark on the inside edge where shown with a pencil. See Fig (4) And repeat this for each angle.

Now the ends as shown in Fig (3). The following will be down to how you decide to fit your blinds along with brackets used. If you are face fixing off the window frame there are no handles and the type of blind chosen can not be provided with face fix extension brackets, see the list provided above 1 -- 4. Then the blind will fit tight to the corner where the frame meets the wall.

If you are top fixing or using the option of extension face fixing brackets for the following blinds: roller, vertical 89mm louvers , aluminium venetian, wood effect venetian that provide extended face fixings, you could possibly make the two side blinds a little wider to close down the gap on the side window ends. This would be determined by the angle of the brickwork and the depth of your handles. Give some consideration to how you get a fixing and be sure the blind will not touch the wall.

Note: you will need to top fix if you use this option with a roller blind as the brackets are attached at the ends of the blind.

You now have all the blind widths. See Fig (4) marked on the frame measure A-B, C-D, E-F. Deduct 1cm from all the widths.

Now for the drop. Measure left to right in three places from where the blind headrail will sit down to the window sill in three places. Make a note of the smallest drop this will be the measurement you will use when you place your order.

Remember when you place your order you need to select (Exact) Blind Size. 

This will indicate to us that you wish your blind to be made to your exact dimensions and that you have allowed for clearance of 1cm between the blinds, and that you have provided all drops as the shortest noted.

All blinds. with the exception of verticals, will be supplied to your exact drop given. In all cases we will deduct 1cm from all vertical blind drops given if ordered as recess or exact to give window sill or floor rotation clearance.

  • Please note this information is for your guidance only. It is how our trained fitters measure for bay windows, We cannot be held responsible and do not accept responsibility for errors and possible oversight on your part when you measure and supply us with your dimensions.
  • Sizes provided by the customer are your own responsibility. Refunds or replacement blinds free of charge will not be possible if you mis measure.
  • Dependant on the size of your window frame work, you may find that in the corners of the bay by the time you have allowed for handles and the blind headrail there may be a small amount of glass showing when the blind is in the closed position. To try and avoid this, when measuring look down the window from your marks on the ceiling to see if the position of the blinds will give you total glass coverage, in some cases it may have to be a compromise.
  • If you are unsure on any of these instructions then we suggest you order and fit the main blind first then order the side blinds to fill in the gaps to the sides. If you decide on this option we cannot guarantee the blinds will be a total match in colour. or that slats will line up.
NOTE: Child safety loose cords and looped cords.
Installation height not known.
“Please advise us immediately after placing your order quoting your order number via email, if your blind headrail is to be installed in excess of 2.5 metres from the floor. This is essential so that control lengths can be adjusted, otherwise blinds will be supplied with controls compliant with EN 13120 so will be supplied up to a maximum of 1 metre long.”
*If drop is greater than 2.5m then cord and chain length must be less than or equal to drop of blind minus 1.5m.


It is important for us to have accurate measurements for your blinds, as they are made to your specific measurements. If you have any problems or questions, please contact us.

Image title

Picture 4 Wooden blinds 50mm slats: this option would require, if face fixing, some battening to match your handle depth if your fixing position does not offer this, Otherwise you can top fix. This example is 4cm for handles on a 50mm slat headrail so bracket = 66mm handle is 40mm totals 106mm.

Cut some card to match the size 106mm. Where the tips of the card meet in the apex, mark where shown (1). This will be the ends of the individual blinds.

Order as exact and possibly allow a little extra for fitting clearances. Use the same principal for all blind types.



Angled Bay Window Measuring Guide.

Headrail width dimensions for top fixing & face fixing Angled bay windows

Remember you need to add the handle depth to these dimensions*
The dimensions given are for our made-to-measure blinds and do not represent an industry standard.

ANGLED BAY BRACKET SIZES

Wooden venetian blinds

Image title Wooden Blind box bracket 25mm & 35mm.


25mm slats 46mm Face Fix: no handles.
25mm slats 46mm Top Fix: + your handle depth*
35mm slats 46mm Face Fix: no handles.
35mm slats 46mm Top Fix: + your handle depth*



Image title 50mm Wooden blind box bracket.


50mm slats 66mm Face Fix, no handles.
50mm slats 66mm Top Fix, + your handle depth*






63mm Wooden blind box bracket.



63mm slats 76mm Face Fix, no handles.

63mm slats 76mm Top Fix,+ your handle depth*





Standard aluminum / venetian blinds wood effect.

Image title Venetian blind standard swivel bracket



25mm / 16mm slats 31mm Face Fix, no handles.

25mm / 16mm slats 31mm Top Fix, + your handle depth*




25/16mm Face FiImage title UEB EXT bracket face fix Venetian Blind.x UEB Ext Bracket 73mm, provides 4cm handle clearance.





Pleated blinds.

Image title Standard Pleated blind face fix bracket.Standard 20mm headrail Face Fix 36mmno handles.







Image title PLeated blind UEB EXT face fix bracket.



20mm UEB Face Fix Ext 70mm, provides 4.7cm handle clearance.




Image title Pleated blind top fix clip.


Standard 20mm headrail 22mm Top fix + your handle depth*





Roman blinds.

Image title Roman blind sidewinder swivel bracket top and face fix.

Sidewinder with headrail 44mm Face Fix, no handles.
Sidewinder with headrail 44mm Top Fix,+ your handle depth*

* Both headrails will provide 35mm clearance from handles.




Image title Cord & Cleat Roman Blind top and fac fix.


Cord & Cleat 45mm Face Fix, no handles.
Cord & Cleat 45mm Top Fix, + your handle depth*

* Both headrails will provide 35mm clearance from handles.



Roller blinds.

Pic 1

Ø32mm barrel Roller Blinds up to 2mt.*Note roller blinds over 2mt are upgraded to larger barrel size

we can match all blinds so all manufactured on the larger barrel size. So you would need to allow for this in the corners by measuring with the larger bracket see pic 2 & 3.

Ø32mm barrel Face Fix 6.2cm for a width under 2m, Order as REVERSE ROLL.

Ø32mm barrel Top Fix 4.9cm for a width under 2m, + your handle depth* standard roll.




Pic 2

Ø40mm barrel width from 2mt all fabrics marked with an *


*Note roller blinds over 2m are upgraded to larger barrel size all Solas fabrics marked with a * will have this bracket.

We can match all blinds so manufactured on the larger barrel size.

So you would need to allow for this in the corners by measuring with the larger bracket see pic 2.

Ø40mm barrel Face Fix 6.8cm for widths between 2 and 3.0 metres, Order as REVERSE ROLL. 

Ø40mm barrel Top Fix 7.3cm for widths between 2 and 3.0 metres, + your handle depth *Order as standard roll.



Pic (3)

Ø45mm barrel 2mt plus fabrics NOT marked with an *

*Note roller blinds over 2m are upgraded to larger barrel size all fabrics NOT marked with a * will have this bracket.

We can match all blinds so manufactured on the larger barrel size.

So you would need to allow for this in the corners by measuring with the larger bracket see pic 2.

Ø45mm barrel Face Fix 8.3cm for widths between 2 and 3.0m, Order as REVERSE ROLL. 

Ø45mm barrel Top Fix 8.1cm for widths between 2 and 3.0m, + your handle depth *Order as standard roll.





Vertical blinds.

Image title Vertical blind SF 5

We would not recommend fitting 5" louvres in a conservatory.

89mm Louvres allow 96mm SF 5"Face Fix Ext Bracket.

Provides 45mm handle clearance.






Image title Vertical Blind top fix bracket.


 89mm Louvres allow 40mm Top Fix: this allows for free rotation of louvres from handles. + your handle depth*