If you’ve lived in any house long enough, you know what it is to have a roof drain fail. Downspouts leak at the seams and burst, and water flows backwards to the eaves, which start to stain, sag, drop and turn into waterfalls.
Sometimes it’s a case of bad design, but for the most part, it comes down to maintenance. Houses, of course, aren’t one time expenses. Like a partner, it demands attention. The more you ignore it, the bigger the trouble that ensues.