Yes the plywood should be flush of slightly shy of the outside of the sub fascia board.
How far over edge for roof plywood.
Add an inch and a half for subfascia strike a line.
Edge clip requirements depend on the relationship of the panel span rating to the actual distance between roof framing.
Too little can allow water to seep into rake or fascia boards.
The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed.
The answer depends mostly on how far apart the rafters are and the roof loads which vary based on the pitch of your roof.
Measure from the edge of the plywood outside of the wall over to whatever the overhang will be and square a line up to indicate the end of the truss tail.
Too much overhang and the shingles could blow off in high winds.
Position the first piece of plywood or oriented strand board sheathing on the bottom edge of the rafter tails at one end of the roof.
Installing plywood on a roof hello youtubers here s another video about plywood sheathing and composition shingles after replacing all damaged wood and.
Align the long edge of the sheathing with the ends of the.
Add the thickness of the true fascia 15 16 in in this case.
Spacer type panel edge clips are available from some manufacturers.
In my experience with siding this is one of the most common mistakes.
Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels.
Roof sheathing panel spacing hints.