Important test - Remember you are measuring aperture sizes, not door sizes.
Once you’ve measured your width and height in three places, always provide us with the largest width dimension and the shortest height dimension. You do not have to allow for the thickness of Spaceslide liners or end panels, as our software will automatically reduce the aperture size by the correct amount. The normal overlap on the doors is about a frame’s worth.
However if you are installing your own liners, or installing batons to level up the aperture you must measure the aperture within your installed sections