Hello,
I once built a small house in the middle of a protected village and in order to make the roof line conform a bit to the existing, skyline, lets call it, I wanted it to look as if it were sagging a bit throughout its length so I snapped a line at a fairly steep angle to the side of the ridge beam rather than perpendicular and got about a 4 cm deflection on the 6 meter length which I then formed with an adze. Well, in the end it was hardly noticeable, but on the other hand maybe will speed up the entropy effect and sooner rather than later the new house will fit into the surrounding context. The point is that a perfectly straight ridge is a matter of choice and not a technical necessity.
Greetings,
Don Wagstaff
