I need some clarification on these statements regarding gutters/downspouts. In the “How to Inspect the Exterior” course, these two statements show up, in different parts of the course.
“On buildings with multiple roofs, one roof sometimes drains onto another roof. Where that happens, water should not be discharged directly onto the roofing material. The best practice is to direct the water from higher gutters so that it discharges into lower gutters through downspout pipes.”
“First-floor gutters can overflow if second-floor gutters have been mistakenly directed to drain into them.”
What should I be looking for in the situation of second-floor gutters, as far as where they are supposed to drain to?