Vehicle with roof security system

The vehicle (100) i.e. lorry, has a roof security system with a blowing body (2) i.e. hose, placed between a vehicle bodywork (12) and a tarpaulin (1) for preventing or eliminating accumulations i.e. water. The blowing body is attached to an evacuation pipe connected to a feed device over a pneumatic system arranged on a pressure input side to control filling and/or evacuation of the blowing body. The filling of the body is stopped when a specific pressure value is reached. A pressure output side of the system has a pressure sensor in communication with a controller for detecting pressure.