This may be a simple no-brainer for most members here...
I will be (re)roofing my small ranch home this spring. It currently has 3/8 sheathing that has sagged in some areas, and the "STAPLES" holding it down have let-go in others.
My simple question is...
can I just install 7/16 OSB over the exsisting sheathing?

There have been no leaks or signs of rot on the current decking. (7/16 OSB because I have a 30 day price at 7.90 per sheet.)
TIA for any replies.