As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom.
Attic framing styles.
Installing attic flooring for light storage only.
A clerestory and hip roof for example.
A combination roof is quite literally a combination of types of roofs.
Collar ties are horizontal members that like rafter ties extend from rafter to rafter but.
Four basic roof styles flat shed gable and hip serve as the foundation for complex styles such as mansard with its multiple hip planes and gambrel which features more than one gable plane.
It is a complex framing style that can be or usually is a variation of the hip roof but a gable home may also make use of bonnet frame.
The style depends first on the owners preference then on whether the building is a home barn church public structure or business along with the nature of its intended use.
Often incorporating two or more designs for aesthetics and practical reasons combination roofs can feature a range of styles.
If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.
Timber frame or post and beam structures can styled in many ways such as a saltbox farm house fancy barn two story colonial or a hammer beam cape.