Since few trees grow in the arid plains at the base of Colorado’s majestic Rocky Mountains, most of Denver’s beloved old neighborhoods are built from brick. After all, clay is plentiful where mountains loom, and early Denverites learned the benefits of brick in a big way. Many of the first houses in the Queen City of the Plains were built rapidly from logs, then consumed in a deadly fire that nearly destroyed Denver City, as it was known in 1863. Shortly thereafter the mayor proclaimed that all future buildings would be constructed of fireproof materials.
In the following years, gold, ranching, railroads, and healthful air for treating consumption (tuberculosis), brought thousands of people to Colorado, and dwellings were built quickly to house them. By 1900, 206 brickyards dotted the Denver landscape. For decades, the walls appeared to be steady and strong, but after a century, some of the houses are starting to show structural failure. The outer layers of bricks are separating from the bricks behind them, a condition called delamination that can lead to their collapse. Though the causes of this condition are not unique to Denver, it’s a recurring problem in the city, so they have a lot of experience that can be applied to many buildings across the country.