Originally Posted by
Scott Patterson
The brown stains could and are most likely from the wood in the wall leaching out tannins as it rots.
Not sure about EIFS as I don't see any, but, if stucco (or even if EIFS?), the only way to see those tannins would be if there was not building wrap and no paper behind the metal lath, unless both of those have also failed miserably.
If it is stucco and if those are tannins from the wood, that would indicate that the stucco was indeed horribly installed, worse than I suspected.
With EIFS, the old barrier type, was there a protective building wrap separating that from the wood sheathing?
The new drainable EIFS has that as well as a drainage plane (as I understand it) which would make it more like stucco - two layers of protection, with the drainage plane being between them.