When you walk into a building most of the time, the first thing you notice is the appearance of the floor. Does it shine or is it dull and dirty? If it seems extra shiny it could be that the floor is wet and if so, there should be wet floor signs indicating such.
Wet floor signs are not simply to let you know the floor is wet, rather to give a visual warning that there is the possibility of unstable footing which could cause a person to slip and fall sustaining injury. If you mop or refinish your floor causing it to be wet and someone slips and falls and the warning signs are not in place, there is a big chance are you will get sued and you will lose. Insurance companies and private industry lose millions of dollars every year because a wet floor was not marked with warning signs or wet floor cones.
A good rule of thumb to remember when using wet floor signs is to insure they are visible from every point of entry into the area where the work is being conducted. This will insure that anyone entering your work space will notice the warnings and take extra care as they pass through. Many of the signs today will not only be bi-lingual but have a pictogram as well giving an extra visual aid of the warning.