can you just pass the buildings on route to your objective?...and would the zombies stay dormant in the buildings?your survivability would be higher.although you will encounter them at your objective areas and on your way to your objective.but was just curious about actual not opening doors or knocking but just passing the buildings?
If a building is not activated by opening a door or a Knock action then those rooms/buildings wont spawn any Zombies/creatures.
Sometimes you may want to search them or use them as a fast route whilst slowing a Zombie down. If you enter a room and clear it of Zombies (or none spawned) you can then close the door, they can't see or smell you. You may then leave the room through another door and close it.
They will then take the shortest route to a either a Character they can see or smell or is closest to them. Even if the room is on the shortest route it will cost them 1 move to open the door and will only charge if they then see or smell you , so you slow them down.
Remember they only charge if they see or smell you when it is there turn to move.