With the increased awareness of sustainability in the property industry, many clients particularly those with large property portfolios such as The Crown Estate and British Land, now insist on the use of sustainable building products on their projects. It Started With BREEAM When BRE introduced BREEAM in 1990, it quickly became the industry standard for sustainable building design and construction. Since then, BREEAM Excellent has become the benchmark for sustainable design, and now BRE has followed-up with a new environmental standard specifically for building products. BES 6001 Takes Sustainable Design to the Next Level BRE’s BES 6001 was introduced in 2012 as the environmental standard for the responsible sourcing of construction products. It is one of the nine key criteria used to evaluate sustainable design within the BREEAM assessment process, see figure 1.