Originally Posted by GBrackins
typically the sheets should have 1/8" gap between them (width of shaft of 8d common nail) for expansion. measure the sheet that is butted tight and see if it is 96" x 48". if it's over that means it has absorbed some moisture and expanded already.
I'm sure you'll get better answers from the roofing experts.
The plywood was installed 13 days ago and today I measured the 48" width. It looks like it is 1/32" wider. The 96" length was cut down, so I have no real reference point on the long side.
Should I expect further expansion? If this is about the max expansion, then I won't worry about it.