When using the Alumasc/Zinco Irrigation system, where should the irrigation units be located?
Prior to installation of the green roof, the outlets should be plugged, and the roof temporarily flooded. Because of unavoidable differences in levels, the water will be deeper at some points than others. The automatic irrigation units should be located where the water is deepest, and calibrated so that there is water coverage of at least a few millimetres at the shallowest points. The larger B52 units are designed for use only immediately adjacent to the outlets, whereas the smaller B32 units can be positioned anywhere on the roof, regardless of outlet positions. Alumasc will advise on the exact number and location of units for each specific project.
