Yes, I've considered asphalt, but since I"d have to deck it (currently
has 1x4 behind the shakes), it would be costly. Also, the asphalt
would probably look fakish.
The ledger is a good idea for straight shake application, but this
design alternates the height between every other shingle. It's a 1"
drop down on every other shake. I have a stapler for this, so it goes
pretty quick, but it's still one piece at at a time. It takes about
6-8hrs to do a square.