I wanted this backyard chicken coop in Princeton to last for 100 years; so I utilized traditional wood-on-wood joinery throughout the build so that it would hold together intrinsically, without relying on the longevity of the metal fasteners alone. In fact, the heavy duty raccoon-proof doors were actually framed without using a single screw, only handcrafted 3/4" pegs and wood glue. But where I did use screws, the construction is such that, even when every screw rusts and fails, the coop will stand.
Natural building techniques used:
No pressure treated wood! Sill plates are coated with authentic black pine tar (what Vikings used to waterproof their ships), and everything else is painted with traditional, non-toxic linseed oil paint for bulk water protection + vapor breathability.