Drainpanels are sustainable tile-systems which function as a water-permeable underlay for artificial grass. GRS Balcony Drainpanels have a unique checkerboard pattern that ensures optimal load distribution and a stable surface. In addition, special spikes have been applied to the top of the tile system, which prevents the artificial grass from sliding. The GRS Balcony Drainpanels thus form the basis for an ecologically responsible paving under the artificial grass. It is specially developed for roof terraces and balconies.