roof frame material
The material forming the structural framework that supports the outer covering of a building's roof.
The roof frame material for any building is the material used as the skeletal or underlying framework that supports the outer roof covering.
The framework carries the roof covering. A visible covering material does not necessarily reveal the material supporting it below.
Roof covering describes the outer surface, while roof form describes shape. The supporting material can change without changing either the roof's shape or its surface covering.
