I have a Vachette lock installed on a door with a internal doorknob and no doorknob outside (one needs the key to open it). The lock is certified, which means that it is supposed to "resist to attacks" for a given time.
My question is whether this resistance applies only when the lock is turned (ie. the deadbolt is engaged into the frame of the door) or does this also applies to the latch bolt?
In other words, is a door closed, but not locked, conceptually as difficult to open as when the deadbolt is out? I am strictly asking about the difficulty to manipulate the lock so that the latch bolt is pulled in (to open the door) compared to the difficulty to bring the dead bolt in (and, ultimately, the latch bolt to open the door).