Make sure you place it within the boundary of the floor element.
How to make a sloped floor.
Mix up some concrete mix in the mixer.
You can envisage that this point may represent a drainage point in our floor that we want to slope down to.
As soon as you place the point revit resolves the new surface by triangulating it.
Except for that slope the floor itself might be flat.
Use one of the following methods.
If we switch to a 3d view it is far easier to see what is going on.
You can create sloped floors in the building model.
For example a floor that extends 4 feet away from the drain should have 1 inch of overall slope.
For rooms that have a general slope the issue may be foundation problems that require the assistance of a foundation repair company or a general contractor.
Specify a value for the offset from base property for parallel floor sketch lines.
Specify a value for the defines slope and slope properties for a single floor sketch line.