18 year old shake roof over ply wood decking.
Comments please
without further specifics on your inspection this is my comment 
try 3
Thanks, Barry. How about the cupping/curling?
Scroll down also see repairs. Hard to tell to what extent and severity from your photos, but I’d advise repairs where indicated, cya. Any moisture noted on the decking or in the attic would warrant further evaluation and necessary repairs.
Thanks Barry!
It was pretty pronounced on one side. I am calling for a roofer to repair. I’ve not seen plywood under shakes before, usually slats, was wondering if that had something to do with it.
Greenie for you after I spread some around. :mrgreen: