As important as the roof is, it does tend to be overlooked because it isn’t something that homeowners often have problems with. As long as it keeps the house protected from the harsh exterior elements, they would automatically assume it’s in good condition.
However, just because you don’t see a problem doesn’t mean it’s not there. In fact, it is this oversight that usually causes problems to become big enough to be noticed. By this time, though, the damage would have become serious enough to spread to the other parts of the house. This could translate to a major inconvenience, possible risks on health, and surprising expenses.