I’m an owner builder (second time).

I am about to put metal roofing over 30lb roofing paper over 3/4″ cdx. Some 3 in 12, a little 6 in 12 roof.

The paper was stapled down and has been there longer than anticipated. THerefore it has taken mr of a beating.

The 6 in 12 has only taken sun (one side) and weather, but is pretty much without tears & hasn’t been walked on much. The 3 in 12s got a lot of traffic in places and have some tears including one that is leaking into the house.

Question is: pull it all up and replace before the metal goes on, or repair the trouble spots with a new ribbon?

Thanks in advance.