However there is also an architectural purpose to them.
Normal roof overhang.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building.
Additionally forming this needs to pay attention to the edge of your roof.
A typical metal roof overhang may be 2 to 4 inches or even less.
As a rule there are two popular methods in framing it pant or flat roof overhang and gable roof overhang.
Ways to frame the roof overhang framing the roof overhang is basically in line with the style and shape of your flooring.
They also help to frame windows on upper stories.
Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
There is a certain logic in extending the gable overhang further the higher you get as you mention but that complicates the roof and i don t like the look of it.
The roof overhang will be 36 inches at the eaves measured horizontally and 36 inches at the gable ends.
That is their functional purpose.