Material (To order)

Maybe I miss something, or do something wrong. When I look at resources I see options to assign a resource to a task, for example tools, a crane, etc.
But I am looking for an option to assign material (to order) to a task.

For example : Task = Tile walls
Resources/material required : x sq meter of tiles , SKU#, and price

This also to include in a T&M invoice. 

Hope someone can help me.
Kind regards, Bram