The siding underneath the overhang is known as the soffit.
The overhang of a roof.
Overhangs on all four sides of barns is common in swiss architecture.
An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building.
Roof overhangs at the eaves and rakes protect the walls below from rain and sun.
Roof overhangs are the amount that the roof hangs over the top of the siding in residential home construction.
They also help to frame windows on upper stories.
But are they really necessary.
An overhanging eave is the edge of a roof protruding outwards beyond the side of the building generally to provide weather protection.
The length of the overhang depends primarily on the climate.
That is their functional purpose.