The polycarbonate moulding has special predetermined breaking points that make it easy to split. We recommend attaching the pigeon spikes with our special adhesive (see accessories). Before installation, the surface to be protected should be thoroughly cleaned to remove dust and grease. If necessary, the adhesive surface can also be treated with a primer, especially on sandstone-like surfaces. Alternatively, the installation can also be carried out by screwing, nailing or using cable ties.