Cob: stucco question

[Roxboro Yurt]

I am sufficiently convinced of the inadvisability of
applying cement/concrete/stucco to a whole cob wall,
but I was wondering if anyone has thoughts on putting
a small stucco border, perhaps two feet high from
ground level, up the foundation and covering the
bottom of the cob wall, then changing over to mud
plaster?  I want to protect the wall base from rain
splashing up, as I have noticed it definitely gets wet
at the bottom  when it rains very hard, even with a
two foot roof overhang.  
I can’t see why a small border would harm the wall,
the inside would still breathe, and the moisture would
be able to wick up and out over the stucco. 
Alternately, I have thought about a tin border, or
board and batten but the tin is sort of ugly and wood
has its own problems.  Does anyone have better ideas,
or any reason to doubt the stucco border idea?  


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