I cut open my ceiling drywall to take a peek in my "attic" (about 20" of vertical space) before I go about having a skylight installed. I have a flat roof and I noticed one of the rafter/joists is cracked. The span of the board is approximately 13', the crack is what you see: less than 2'
Is the fix to simply sister (screw) a 3' length of 2x8 to the problem area? I don't really have access to the other side of the board unless I cut another access hole in the ceiling which I'd like to avoid.