If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.
Attic framing styles.
The upper portion of the roof is heavily pitched and the lower slope is gently pitched.
Collar ties are horizontal members that like rafter ties extend from rafter to rafter but.
Installing attic flooring for light storage only.
If you re familiar with basic carpentry and framing techniques installing decking for attic storage is a diy friendly project.
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.
A combination roof is quite literally a combination of types of roofs.
As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom.
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.
Often incorporating two or more designs for aesthetics and practical reasons combination roofs can feature a range of styles.
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.