very good point. hadn't considered that.
I think I'm looking at a standard reroof (every 10-20 years dependent on tile make up). They definitely replace the underlayment along with singles (because composite in my case) - the standard reroof process (to my understanding) when existing covering has deteriorated to the point where underlayment will be exposed....and then soon deteriorate and leak.
No rafter, truss, or plywood work.
I'll ask my roofer more about the process.
Thanks!
