i've used both cedar and birch bark as exterior wall coverings, in conjunction with split cedar shingles. i think both look really nice. i applied both over tar paper into osb with copper nails. it was a handy way to fill in over the door and windows, and the barks looked pretty as accents against the cedar shingles, IMHO.
poplar bark shingles are news. i wonder what kind of poplar they're using and how to make them?
