There is a lot of history that goes with access panel doors, and in a primary sense, they’ve been around nearly since man existed. They began as simple blockades at the entrance of a cave or a set of guards. Over time they’ve progressed to the metal secured ones we see today.
If you’re not familiar with them, you may be wondering what the heck is an access panel door? What is its use? How do I select one if I need one?