hey all excuse me if this is not perfectly Green building related. I asked over at FHB as well but i know this forum is much more active so i thought i would try my luck. If it needs to be removed, I apologize in advance- i had a roofer just punt two weeks down the road on me. I am getting ready to do hardie on second story . im basically ready but every wall has a roof that dies into it. shed roofs onfront and back. little eyebrows on sides, and some rake soffit on upper sides. Im thinking of just screwing corner boards so i can remove later, and starting siding on second course. obviously I wont be able to blind nail  bottom course once they get their flashing in. Am i missing something that makes this a terrible idea? open to any thoughts.
ps. I suggested that i woould install flashing but roofer said he wouldnt be able to give warranty so that shot that idea