The transparent walls of Philip Johnson's revolutionary Glass House allow nature enthusiasts to immerse themselves in the environment. But, being at one with the great outdoors can also invite nature's peskiest by-product: leaks due to rainwater. While no property is immune to the occasional leaky roof, flat-roofed homes like the Glass House are more susceptible than most to continuous leaks. Frank Lloyd Wright is rumored to have called one of his designs a "two-bucket house." In response, Philip Johnson retorted that his was a "four-bucket home," with a bucket stationed at each corner.