There are two distinct types of green walls: Green Facades and Living Walls. Green Facades are a type of green wall system in which climbing plants or cascading groundcovers are trained to cover specially designed supporting structures such as modular trellis panel systems or cable and wire-rope systems.

The plants in these systems are rooted at the base of these structures, or in planters at different levels and take several years to fully mature. Living Walls are composed of pre-vegetated panels, vertical modules or planted blankets that are fixed vertically to a structural wall or frame.

These panels can be made of plastic, expanded polystyrene, synthetic fabrics, clay, metal or even concrete. Living walls typically require more intensive maintenance than green facades. The research teams will be studying both types of green wall systems over a three-year period.

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