What happens when you change a type parameter for a door material?

When a type parameter for a door's material is changed, all instances of that door type within the Revit model are updated to reflect the new material. This is because type parameters are associated with the entire type, meaning that the change is applied universally to every instance of that type, rather than just affecting a single instance.

In Revit, doors are categorized by types, which determine characteristics shared by all instances of that door type. When a type parameter like material is modified, it propagates throughout all instances, ensuring consistent representation across the project. This functionality is particularly useful for maintaining uniformity in design elements across multiple locations in a building, making it easier to manage changes and maintain design integrity.

In contrast, changing instance parameters would only affect the selected instance, whereas type parameters influence the entire type, demonstrating the structural hierarchy within Revit's data management.