Hertalan waterproofing systems are ideal for this type of application due to the root resistance of the membranes and factory vulcanised joints and Hertalan's environmentally friendly credentials were an important factor in the client accepting the materials as being suitable for the project.

The green roof system specified by Green On Top contains deep growing medium to ensure the vegetation will not require irrigation or the application of fertilizers. The roof has been seeded with a blend of native grasses once established the roof should fit in to its surroundings very well.