How To Measure Corner Windows

What is a corner window?

A corner window arises when two windows meet at the corner of a room. Corner windows occupy more than one surface of the house, and the corner may or may not be supported by a window frame.

We can design one frame to occupy your entire corner window, with a special corner post supporting the panels in the corner of your window. Please refer to the instructions below for help with measuring up for a corner window.

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measuring for a corner window

Corner windows can be a little trickier to measure than stand-alone rectangular windows. We've tried to make the measuring process straightforward, but if you get stuck you can always reach out with photos of your corner windows and we'll guide you through the process. Essentially, you can treat your corner windows like two separate windows - one left (L) and one right (R). 

To get started, you'll also need to work out which frame type you'll be using on your window; will you be inside mounting or outside mounting your shutters? 

You will need:

  • Metal measuring tape
  • Paper
  • Pen

When designing your shutters, we will treat the corner window as two separate windows. First, design Corner Window L. Next, design Corner Window R. Once you’ve placed your order, we will combine the two windows into a single corner window for you!



measuring for an inside l-frame

Let's begin by separating your corner window into two separate windows - Left Corner Window (L) & Right Corner Window (R). We start measuring from the left.

Remember, we're measuring for an Inside L-frame, so we always measure inside the recess. Be sure to measure along the front wall - the section of the recess closest to the wall, not the window panes.

1. Measure the width of the left window (L)

  • Start inside and on the very edge of the left hand recess.
  • Measure to the corner (the point where the two recesses meet).
  • Measure this distance in 2 different places. 
  • Mark your Measure Point L with a pencil.

Shutters Dept Measuring for Corner Windows 03 Inside L Frame A 4

2. Measure the width of the right window (R)

  • Start at Measure Point L and measure to the end of your right window recess.
  • Measure this distance in 2 different places.

Shutters Dept Measuring for Corner Windows 03 Inside L Frame B 2

3.  Measure the drop

  • From bottom to top in 3 different places

4. Select the smallest of your 3 measurements

MEASURING FOR AN INSIDE Z-FRAME

Let's begin by separating your corner window into two separate windows - Left Corner Window (L) & Right Corner Window (R). We start measuring from the left.

If you don't have one already, you'll need to request a sample pack. Having a Z-frame template on hand will make this process much easier.

Remember, we're measuring for an Inside Z-frame, so we always measure from inside the recess

1. Find your measure points

  • Place the profile of the Z-frame up against the corner of your window (where the recesses meet) and make a mark for Measure Point L.
  • Repeat the above step, this time placing the profile against the opposite side of the corner and make a mark for Measure Point R.

Shutters Dept Measuring for Corner Windows 03 Z Frame A 1
Shutters Dept Measuring for Corner Windows 03 Z Frame B 1

 

2. Measure the width of the left window

  • Start inside the left hand recess.
  • Measure to Measure Point L.

Shutters Dept Measuring for Corner Windows 03 Z Frame C 1

3. Measure the width of the right window

  • Start at Measure Point R.
  • Measure to the end of the right hand recess.

Shutters Dept Measuring for Corner Windows 03 Z Frame D 1

 

4. Measure the drop of your window

  • Bottom to top from inside the recess
  • Measure in 3 different places
  • Provide the smallest of 3 measurements

 

MEASURING FOR AN OUTSIDE L-FRAME

Let's begin by separating your corner window into two separate windows - Left Corner Window (L) & Right Corner Window (R). We start measuring from the left.

Remember, we're measuring for an Outside L-frame, so we always measure from the edge of the architrave. If your window is square set (i.e. no architrave), measure from the edges of the inside of the window - we'll then add to your measurement to ensure your shutters can be installed as an outside mount.

1. Measure the width of the left window (L)

  • Start at edge of the left hand architrave.
  • Measure to the corner (the point where the two architraves meet).
  • Measure this distance in 2 different places. 
  • Mark your Measure Point L with a pencil.

Shutters Dept Measuring for Corner Windows 03 Outside L Frame A 1

2. Measure the width of the right window (R)

  • Start at Measure Point L and measure to the edge of your right window architrave.
  • Measure this distance in 2 different places.

 Shutters Dept Measuring for Corner Windows 03 Outside L Frame B 1

 

3.  Measure the drop

  • Bottom to top from the outer edges of your architraves
  • Measure in 3 different places

4. Select the largest of your 3 measurements

Measuring is a critical part of the Design Process. Once your order has been processed, we will always call you before finalising to ensure measurements are accurate. If you’re confused or have any questions about measuring, please send us an e-mail or give us a call. One of our team would be happy to help out!

 

Surcharge

Fitting custom made shutters to corner windows takes additional effort and time and also requires specialty parts. Due to this, we charge a further 10% for the price of all corner window shutters. 

 

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Gil Baker
By: Gil Baker Published: 19 Feb 2020