The wind damage that looks like nothing
A gust can lift a shingle, break the seal strip underneath and lay it back down. From the ground the roof is untouched. It is also no longer sealed, and the next driven rain goes under it.
We check by hand along the exposed elevations rather than by eye from the driveway, because a broken seal is something you feel rather than see. Caught early it is a repair; left, it is where the next real leak starts.
The builder-grade original is the common denominator
Across the newer ring the original covering is the same specification, fitted the same way, at the same time. That makes the failures predictable — the same ridge detail, the same shallow porch, the same fastening pattern turning up street after street.
It also means a repair is often genuinely worth doing, because the rest of the roof is in known condition rather than a mystery.
Pipe boots outlive nobody
The rubber collar on a plumbing stack hardens and splits long before the shingles around it are worn, and on a roof between about fifteen and twenty-five years old it is the single most common cause of a ceiling stain we are called to.
It is a small repair and an easy one to miss from the ground, which is why we look at every penetration when we are up there rather than only the one above the stain.
Tree cover here is patchy, and that changes the list
Clintonville and Worthington carry mature cover; large parts of the newer rings carry almost none. The same house in the two places has a different maintenance list — debris, moss and blocked valleys in one, and bare exposure to sun and wind in the other.
It is worth saying because advice that suits one half of this market is wrong for the other half, and the roof will tell you which you have.