I’ve been studying the roofing courses and reading installation instructions. It appears to be a topic of much debate. There’s a thread to this topic many years ago.
Owens Corning recommend when drip edge is used to have the shingles flush with the drip edge on the rake. GAF recommends up to 1/2 inch overhang. When I did roofing we always had the 1/2 inch over hang on the rake regardless of brand, guess I should have read more instructions back then.
Does anyone address this with their inspections?
By code in my area underlayment is not required on 4/12 and above. But installation instructions state that the roof should have underlayment. I inspect to installation instructions in this case.
Attached is a photo of a new construction with no underlayment at the eaves. I’m in southern Indiana, ice damming is uncommon. But that doesn’t mean it doesn’t happen.