Free delivery on orders over £149
Always Low Prices! No Gimmicks!
LifestyleBlinds.com :: Measuring Instructions: Vertical Blinds For Boxed Bay Windows 89mm (3.5”) & 127mm (5”) Slats / Louvres

Measuring Instructions: Vertical Blinds For Boxed Bay Windows 89mm (3.5”) & 127mm (5”) Slats / Louvres

Boxed Bay Window

Boxed Bay Window
Tips

Use a metal tape measure to ensure accurate measurements

2 Options For Fitting Vertical Blinds On Boxed Bay Windows

The first thing to do is decide how you want to fit your blinds. Choose from the options below. Review the summary next to each image for tips on which is best for your window.

Option 1: The most common method of installation

This method is designed to ensure that the two side blinds butt up against the front blind which is measured to fill the entire width of the front window.

The allowances for the brackets and the louvre size chosen will the sizes of the side blinds. East to follow instructions are on the following page.

common-method-of-installation

Option 2: The most tricky method of installation

For the confident measurer, this gives a more professional fit as the blinds meet in the corner but is dependent on a minimum frame size of 70mm. Measure from the corner to the glass, if the frame is less than 70mm then go for option 1 or 3 to avoid the blinds not covering the glass properly.

tricky-method-of-installation

Bracket Types for Vertical Blinds ( these are chosen during the ordering process )

Vertical blinds can be fitted either top fixed, where you screw the blind into the top of the recess or face fixed, where the brackets are screwed facewards into the window frame. The same top fix bracket is used for 89mm/127mm slats widths, however there are different size face fix brackets for 89mm/127mm slat size.

Use the information below to determine the bracket allowance depending on the best fitting surface and slat size chosen. This will be referred to as X.

Top Fix

The brackets are fixed into the top of the recess.
BRACKET SIZE: 42mm
89mm louvres, bracket allowance: X = 70mm
127mm louvres, bracket allowance: X = 89mm
This will give a clearance of approximately 25mm between louvre and fitting surface allowing for louvres to rotate freely and for small window handles or obstructions.
(Allowances for any larger handles will be made later)

how to measure vertical blinds for angled bay windows - 42mm

Small Face Fix (only used on 89mm louvres)

The brackets are face fixed into the window frame.
BRACKET ALLOWANCE: X = 75mm
This will give a clearance of approximately 25mm between 89mm louvres and fitting surface allowing for louvres to rotate freely and for small window handles or obstructions.
(Allowances for any larger handles will be made later)

how to measure vertical blinds for angled bay windows - 75mm

Large Face Fix

The brackets are face fixed into the window frame.
BRACKET ALLOWANCE: X = 93mm
This will give a clearance of approximately 49mm on 89mm louvres and 25mm on 127mm louvres between fitting surface allowing for louvres to rotate freely and for any window handles.
(Allowances for any larger handles will be made later)

Note down X for the next step.

how to measure vertical blinds for angled bay windows - 93mm
Window Handle Allowance

Window Handle Allowance

Measure the protrusion of the window handle.

25mm or less move on to the next step as this is already allowed for on the previous step.

Over 25mm, you will need to make an additional allowance.

Measure the handle protrusion as shown in the image opposite e.g. 45mm.

Additional Allowance

45mm window handle - 25mm allowance = 20mm

Option 1: The most common method of installation

1) Measure the full width of the front window. Order as RECESS SIZE

2) Measure the full width of each side window separately as they are often different and note the sizes down then deduct X from that size.

e.g. Left hand side window 89mm louvres, top fix brackets, window handles 25mm or less
Top fix brackets, X = 70mm
870mm wide - X (70mm) = 800mm wide

e.g. Left hand side window 89mm louvres, top fix brackets
Top fix brackets: X = 70mm | window handles of 45mm = additional handles allowance of 20mm
870mm wide - x (70mm) - 20mm = 780mm wide


Option 2: The most tricky method of installation

On both corners measure from the corner of the bay to the start of the glass, if either measurement is less than 70mm then we recommend to not use this option and use option 1.

1) Measure the full width of the front window then deduct x and the additional handle allowance twice if necessary.
e.g. Front window 89mm louvres, top fix brackets, window handles 25mm or less
Top fix brackets, X = 70mm
2200mm wide - X (70mm) - X (70mm) = 2060mm wide

e.g. Front window 89mm louvres, top fix brackets
Top fix brackets: X = 70mm | window handles of 45mm = additional handles allowance of 20mm
2200mm wide - X (70mm) - 20mm - X (70mm) - 20mm= 2020mm wide

2) Measure the full width of each side window separately as they are often different and note the sizes down then deduct X from that size.

e.g. Left hand side window 89mm louvres, top fix brackets, window handles 25mm or less
Top fix brackets, X = 70mm
870mm wide - X (70mm) = 800mm wide

e.g. Left hand side window 89mm louvres, top fix brackets, window handles of 45mm
Top fix brackets, X = 70mm
870mm wide - X (70mm) - 20mm = 780mm wide


Drop

Measure from where the top of the bracket is to be fitted to the window sill. Check the drop all around the bay as it will often differ. DEDUCT 10mm from the smallest drop to allow for some clearnace.

Order all blinds as EXACT SIZE

Download a pdf of Measuring Instructions: Vertical Blinds For Boxed Bay Windows 89mm (3.5”) & 127mm (5”) Slats / Louvres
 
 

By clicking “Allow All”, you agree to the storing of cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts. Find out more