An Oven Destroyed

To protect your oven from the elements, it's essential you keep it dry, and keeping it dry doesn't mean covering it with the "blue tarp."
The earth oven shown was covered in the fall to protect it from the rain and snow. Yes, the tarp protected the oven from the rain and snow, but it did not protect it from condensation that got between the tarp and the dome. 
The result: When the tarp was unveiled (you can see it in the bottom left), we see that the oven reverted to its primal substance. MUD.

This oven needed a roof