If you cannot find the data plate follow the instructions below and note down the information required.

1) Measure the visible glass size, and width first, then the drop in millimetres. Using the tables below find your window sizes in the visible glass width & visible glass drop columns. Once located look left of the table for the window code. e.g. in the table below 384mm x 544mm is Window Code 5/7

2) Check if the frame is made from Wood or PVC. Look in the first column in the tables below for wood or PVC to choose any of the Series numbers.

Please note: The frame type must match the glass size. For example, a window code 5/7 in a wood frame is a different size from a 5/7 with a PVC frame.

IF YOU NEED ANY ASSISTANCE IN FINDING YOUR WINDOW CODE THEN PLEASE USE THIS LINK TO SUBMIT YOUR SIZES AND WE WILL BE IN TOUCH SHORTLY.