Required Dimensions (mm)

PRO TIP: Please ensure all measurements are in millimetres. All measurements should be taken from outside.

*The width and height provided will be the overall product size - including any cills and trickle vents if requested.

Measuring the Width

1. Take three measurements at points A, B and C from brick to brick
2. Write down the three figures
3. Take the smallest figure and deduct 10mm to allow for fitting and sealing

Measuring the Height

1. Take three measurements at points A, B and C from lintel to brick
2. Write down the three figures
3. Take the smallest figure and deduct 10mm to allow for fitting and sealing