successively layers of overlapping foil being appliedHere's a photo of an oven I worked on this past weekend. The baker does not want a cover over the oven, and this presents a real problem in protecting it from the elements. An unprotected mud oven in the northeast might disintegrate rather quickly so we decided to wrap the mud dome with aluminum foil. Any water that got to the foil would theoretically just drain down the side. Perhaps over the insulation we'll wrap the oven with another layer of foil become applying the stucco. There are some who say an oven needs to "breath," but after a mud oven has been fired to 1,000 degrees F., the dome becomes rock hard and the ability to breath seems to be a moot point.
There will definitely be an update on this oven.