The best way to learn how buildings get put together may be to build them, or to watch them be built. But another pretty good way to learn how things go together is to see them falling apart.
You may not ever notice the piece of clay tile that plugs up the bottom of a curved tile at the edge of the roof – but here, in the center of the photo below, it’s sliding out, so you see it, and this may make you curious.
Some people call these eave closure pieces “birdstops.” Some manufacturers provide such accessory pieces in metal. These, on an old house in Denver, are clay to match the roof tiles. Their purpose is to keep out weather, birds, and little four-legged critters.
Falling apart has an upside – we can learn how things are supposed to be put together.