Let’s talk about hats.
All hats have one thing in common: they protect heads.
A firefighter's hat is hard, to protect against falling objects. The very wide brim is worn on the back of the head to divert water away from the first responder's head and onto the back of a rubber coat. The front has no brim maximize vision.
A baseball cap, on the other hand, sports a wide brim on the front to shade the eyes from summer sun. And a classic Stetson does it all. The deep front brim shades the eyes; the smaller rear brim sheds water on the back., and the side brims turn up to shed the elements to the back, but are the smallest, enabling optimal hearing.
So it is with roof overhangs, brimming with purpose.
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