|  | Economical, maintenance 
                                            free, easy to install | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Do 
                                            not corrode as do metal corrugated 
                                            sheets | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Highly 
                                            resistant to extreme weather conditions | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Resistant to industrial 
                                            smoke, fire, rodents, rotting | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Low noise during 
                                            impact of rain/hail  | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Provide a watertight 
                                            seal | 
                                       
                                        |  | 
 | 
                                       
                                        |  | Provide insulation |