The integrative design process understands that buildings, their components, their use and their place and surroundings are interrelated. Whole building systems observe this principle by involving all stakeholders from project conception through delivery and beyond. Engaging all stakeholders in the design process to create a cross-disciplinary team and using a systems thinking approach helps to identify synergies and benefits that might otherwise go unnoticed, resulting in reduced initial and operating costs and optimizing performance. Planted roof considerations include energy efficiency, stormwater management, biodiversity, and urban heat islands. The performance of a planted roof is optimized when coordinated with other building systems, including HVAC and Water. A planted roof has insulating benefits that may reduce the building’s heating and cooling loads. Non-potable water may be considered for planted roofs and landscaping.

The integrative design process brings key players to the table to consider and integrate the planted roof with the architecture and other systems of the building. Roles and responsibilities should be clearly defined and based on the common objective to balance high performance with low operating costs. Stakeholders can leverage the planted roof to add value to the building while also providing benefits to the site and community.