Accurately measured dimensions are essential to ensure a perfect fit.
To make sure screens fit correctly we need the "tight dimensions" where the screens are to be installed, this means measurements should be taken from the finished surfaces to rule out any margin of error such as tile/adhesive bed thickness or out of true walls, this is particularly true for screens fitted on shower trays, it is common to tile down the wall onto the tray thus reducing the trays dimensions. Once we have the tight dimensions we can make all the necessary adjustments for a perfect fit first time. We can also work from templates if a panel is particularly difficult to measure.
Here are a few examples;
Measuring Wall to Wall for a Door or In-line Enclosure
a. Measure from the finished wall/floor surfaces so we have a "tight dimension".
b. Measure the wall to wall horizontal gap in three places.
c. Measure vertically from the floor to the screen finish height.
Measuring for a Floor to Ceiling Screen
a. Measure from the finished floor/ceiling surfaces so we have a "tight dimension".
b. Measure the floor to ceiling gap in three places.
c. Measure the width of the screen.
Measuring for a Angled Ceiling Panel and Corner Enclosure
a. Measure from the finished wall/floor/ceiling surfaces so we have a "tight dimension".
b. Measure all sides five of the angled panel as if it were being installed floor to ceiling.
d. Measure the finished screen height.
e. Measure the door side from the wall.
Measuring a Corner Enclosure on a Shower Tray
a. Measure once the tray has been installed and from the finished wall surfaces so we have a "tight dimension".
b. Measure from the wall to the outside edge of the tray.
d. Deduct 20mm.