The 12-story V House in Ørestad, southern Copenhagen, is an intriguing modernist apartment block made of concrete, glass, and steel. It was completed in 2005, designed by two creative architects, Bjarke Ingels and Julien de Smedt, and shaped into an almost perfect V when viewed from above—an emphatic echo of the playful spirit captured in its name. One of the most salient features is its distinctly jagged balconies along the south side, each measuring 13 feet (4 meters) in length. Sharp-cornered, angular projections at the forefront—like spiky quills on a hedgehog—offer…