to all: those thatched roofs are splendid indeed. I don't
think that there is any issue with the roof and and as Richard said if the client likes it why not. I do some simple quick homework for the client. Simple. All this stuff is not that complicated. Wood shingles use a starter course which is suitable and durable without need for a drip edge. ( they been putin' em up along time before i was around). A rake moulding can be installed on what appears to be a 1x10 rake. Often a simple piece of 1x2. Other mouldings are more pleasing to the eye- My favorite is "Whale Back".
My friend from Cap Cod certainly has an idea about Mass. requirements for shingled roofs as well as my friend from Canada. Chris Bittner