assignment of materials

[stellinatn]

Hello, everyone.
I just started using revit and I'm already in front of a huge problem.
If I wanted to assign to a wall a material and another wall as I do? because it seems that the material is related to the family and therefore the same material applies to the whole family of walls!
help please:_)

 

[lance]

is the philosophy of revit you have to duplicate the family and assign a different material.This will then guarantee you a correct computation in the abachi.