What is the difference between a roof 'Footprint' and a 'Extruded' roof in Revit?

A Footprint roof in Revit is specifically created by defining its boundary within a plan view. This method allows designers to outline the shape and limits of the roof directly on the floor plan, establishing the edges and contours that define the roof's area. Once the footprint is defined, Revit generates the 3D roof automatically based on the defined boundaries and the selected height from the plan.

The concept of a Footprint roof relies heavily on plan view interactions, making it essential for architects to understand how to manipulate their designs in a two-dimensional layout, which is typically more intuitive for defining the layout of a building component like a roof.

In contrast, an Extruded roof is generated by taking a defined profile and moving it vertically, but primarily everything starts from that profile rather than having a boundary drawn in a plan. Therefore, understanding the fundamental distinction in how each type of roof is created is key for effective architectural design within Revit.