Patent ID: 8516744

Claim:
A method for installing a green roof system, comprising: providing a plurality of modular units, each including a base layer having a plurality of reservoirs configured to prevent water flow through a lower portion of the reservoirs, the lower portion for contacting a support surface, and interlocking portions configured to interlock one or more adjacent base layers when installed; a water permeable layer for placement over each base layer; and detachable walls mountable on each base layer to contain planting media; placing the water permeable layer on an uppermost surface of each base layer of the units; attaching the walls to each base layer of the units; filling a space between the walls of the units with planting media; establishing vegetation in the planting media; transporting the units to an installation location; interlocking the units using the interlocking portions in a coverage area of the installation location; and upon installation, detaching and removing the detachable walls from each base layer to form a continuous bed over the water permeable layer.