Describir: Experimental research on the resistance of external walls against rain penetration

  ______    ______   _____      ______   _____       ___      _____   
 /_   _//  /_   _// |  __ \\   /_   _// |  __ \\    / _ \\   |__  //  
 `-| |,-    -| ||-  | |  \ ||   -| ||-  | |  \ ||  | / \ ||    / //   
   | ||     _| ||_  | |__/ ||   _| ||_  | |__/ ||  | \_/ ||   / //__  
   |_||    /_____// |_____//   /_____// |_____//    \___//   /_____|| 
   `-`'    `-----`   -----`    `-----`   -----`     `---`    `-----`  
                                                                      
 __   __  
 \ \\/ // 
  \ ` //  
   | ||   
   |_||   
   `-`'