Here are the real advantages.
Mansard roof structure.
The steep roof with windows creates an additional floor of habitable space a garret and reduces the overall height of the roof for a given number of habitable stories.
After the initial popularity the mansard roof was revived during the re building of paris and became an extremely fashionable feature in architecture for most of the buildings during the second empire 1852 1870 a period during the rule of napolean iii.
You can consider gambrel roof to be a modified version of a gable roof.
If you are not familiar with a gambrel roof then let us first explain its architecture in brief.
While the sides typically come in the either flat or curved.
It depends upon what type of design customer wants to implement.
The ends may alternately attach to the base flashing where a change in roof slope occurs.
Due to its design in the extremely close to nature of this attic space a mansard roof is very efficient in terms space management and the format is related to green roof design.
Simply put the mansard roof also known as the french roof or curb roof is a hybrid between a gambrel roof and a hip roof.
The lower ends of the pans are typically hooked over an edge strip to form a drip.
The lower slope has steeper gradient than the upper one.
There is a sort of visible distinction between flat roofs and mansard roofs.
The mansard itself is used to describe the distinct roof which has double slope on four sides.
A mansard or mansard roof also called a french roof or curb roof is a four sided gambrel style hip roof characterized by two slopes on each of its sides with the lower slope punctured by dormer windows at a steeper angle than the upper.
Mansard is a four sided roof with double slopes on each side so its sides can either be curved or flat.