Low, short garden walls can be built with a single wythe—that is, with only one horizontal row of bricks. But such walls are not strong. You can even push them over by hand. Double-wythe brick walls ...

Artisans around the world are ditching the mortar and embracing an old method of building rock walls Clachtoll Broch, a Scottish dwelling with dry stone walls, was built at least 2,000 years ago. Its ...