Diadem USA is founded in 2007 as a US branch of APP LLC, headquartered in EU. In 2015 we become an independent green roof consultant and system provider of vegetated roof system and services, while most of our components are manufactured in the United States, and even the majority of system relies on local sources. For example, we are using locally available materials and blenders to mix Diadem's proprietary growing media. Our products are widely used in the country by clients who emphasize safety and quality.