Vendor Information: The GreenGrid Modular Green Roofing System from Weston Solutions Inc.Simplicity in design and flexibility are the hallmarks of the GreenGrid System. The system was designed by engineering roofing and horticultural experts to produce an efficient integrated green roof product. GreenGrid offers a modular design that arrives pre-planted and ready for installation. The modules are made from recycled plastics and the components can be hoisted to the roof via elevator forklift or crane and quickly installed in accordance with the design. The modules can be placed directly on the roof membrane or on any other surface with adequate structural capacity.GreenGrid Green Roof System modules are lightweight compared to many other green roof systems. The Ultra-Extensive (2.5-inch depth) modulessupporting only sedum speciesweigh approximately 10-12 pounds per square foot (wet). The Extensive (4-inch depth) modulessupporting shallow rooting grass sedum and wildflower speciesweigh approximately 15-18 pounds per square foot (wet). The Intensive (8-inch depth) modulessupporting a large variety of ornamental perennials and shrubsweigh approximately 30 plus pounds per square foot (wet). They can be easily arranged or rearranged to suit the needs and desires of the client. Most importantly roof maintenance and repair is simplemodules can just be moved should roof repair/maintenance be required then put back in place.