Roof
A roof is the covering on the uppermost part of a building. A roof protects the building and its contents from the effects of weather.
The roof of a complex building is considered to be a component of the building in many asset management systems.
The following are possible roof sub-components.
If the useful life of a roof truss and the material it is made from is similar to that of the building envelope, it might make more sense to make the trusses a sub-component of the envelope.