I have about a 12" gap between the top of my new entry door and the door opening because the house is 100 y.o. and back then they used bigger doors or simply higher transoms. When I ordered the current door from HD, it was not possible to get a custom height or transom.
So I framed a 36x12 box above the door to fill the gap. I plan to close it with a 1/2" plywood piece and then put some wire mesh over it and stucco.
Q1: Will this work? I have never done stucco/mortar over wood or wire mesh.
Q2: If it does work, will the stucco protect the plywood substrate from moisture decay?