I know someone here has this.

My barrel tile roof in Florida does not leak, yet. 25 years old.
It is cement tile over tar paper and hot tar.
When I have it replaced do I screw down the existing sheathing?
replace sheathing (with what?)
tar paper and hot tar?
What I would call "Ice and water shield"?
I am in a deed restricted community and cannot put on shingles or a built up
steel roof.
I like the terra cotta look anyway.

Ed