Other items to think about during roof replacement?

Think about a JACK antenna. The full antenna has some lights that aim you toward to towers. Really don't have to wander around looking for the signal. Not available in the replacement head, just the whole new complete unit. Worth every penny. (Jack antenna does not raise up, just turns very low profile) 3/4 " plywood would be overkill. That's all that's needed in a stick and brick home for under vinyl or carpet. 7/16 would be great, after all, 3/8 is probably all that's on there now