To lock the patio door properly both doors must be locked. In other words, the first door must be locked by pushing up the handle. Then the second door can be locked by pushing up the handle and turning the door with the key.
To lock the patio door properly both doors must be locked. In other words, the first door must be locked by pushing up the handle. Then the second door can be locked by pushing up the handle and turning the door with the key.