Think about it this way: when should we be rolling dice? In my opinion, there are two conditions we need to meet to justify a die roll:

1) The action has both a chance of success and failure; and
2) The action’s success or failure carries consequences.

In the previous example, neither of these things are really true. While we could fail an individual roll, since we can keep trying over and over at no cost we are guaranteed to eventually succeed. There’s no real risk of failure. Frankly, the door might as well not exist since we know for certain that we will ultimately break it down.

So as a game master, how could we improve this door challenge? I have four suggestions: