I had to look at your picture again to notice you had no overhangs. Pretty much every house built up here has at least 18" if not 2 feet of overhang. It's just standard here, done more to keep rain off of the siding then for solar shading. I just lucked out when we bought this place.
The other advantage of the overhang is that means the top of the trusses on the roof are 8" or so above the top of the wall meaning I have 6" of insulation on top of the plate and still have space for venting. I then step it up to nearly 2' deep back from the wall. It's not a uniform R60 across the entire roof but it is over 95% of it and the remaining 5% gets close to R20
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