I have always wondered this question. If we use wood shingles and shakes how come we never see roofs with wood planks?
I hate to admit how little I know sometimes

What goes by the name of "barn shakes" gets you half way there also.
Beautiful job, woody. Tell me more about that one if you would.
I see roofs with wood planks all the time. They just have shingles on top of them. :laugh:
The wood tends to split along it's grain as it ages and dries, which makes it unsuitable for that purpose. Roofs done like that tend to constantly develope leaks.