Overall Window Size Semi-circular window

Please enter the overall total sides of your window including any cill minus approx 10mm, then click Resize.
Click "Size is correct" to continue to prices.
Please read the instructions below and/or watch the measuring video.

Guide for measuring your shaped windows

Circular and semicircular windows

In the case of circular and semicircular windows we will take the width of the opening and assume that the window is a true arch, using the measurement provided as the diameter. If your opening is not a true arch, then we will require a template before manufacture. You can check whether your semicircular window is a true arch by measuring the height, In the case of a true arch this will be half of the width, if this is not the case, we will require a template.

Windows are usually measured from the brick to brick opening from the outside of the property, always in millimetres (mm).

Firstly, measure the width of the bottom of the shaped aperture brickwork to brickwork and deduct approximately 10mm from your measurement.

Secondly measure as many of the remaining heights and widths within the aperture and input where applicable on the measuring page. If you are able to supply us with any of the angles from your shape, then please add these as comments on the cart.

Once you have input your measurements the measuring page will generate the height of your shape (unless you are able to input this), Check this measurement against the highest point of your opening remembering to include any cills.

Most windows sit on a cill, if so then please measure from underneath the existing cill unless it's not removable (e.g. stone).

Please note: If your property is rendered then it's a good idea to remove some of the render in order to view the brickwork edge. Depending on the thickness of your render you may require frame extenders.

Some important points to remember when measuring shapes

Measure from outside, brickwork to brickwork.
If that is not possible, measure your existing window.
Provide us with the overall window sizes including cills or extenders/add-ons (except stone cills or if you're ordering windows without cills).
If in doubt when measuring a shaped frame, we can manufacture your window from a template of the opening.

Please note: We are unable to accept responsibility for incorrect measurements.
If in doubt, we recommend to consult a professional installer/builder.

Overall Window Size Semi-circular window

Guide for measuring your shaped windows

Always measure from under any existing removable cill

unless you are keeping the existing cill or buying a cill from somewhere else

Always measure from under any existing removable cill

unless you are keeping the existing cill or buying a cill from somewhere else

Overall Window Size Semi-circular window

Guide for measuring your shaped windows

Always measure from under any existing removable cill unless you are keeping the existing cill or buying a cill from somewhere else

Always measure from under any existing removable cill unless you are keeping the existing cill or buying a cill from somewhere else

Always measure from under any existing removable cill

unless you are keeping the existing cill or buying a cill from somewhere else

Always measure from under any existing removable cill

unless you are keeping the existing cill or buying a cill from somewhere else