Canopy debris in the valleys
In the towns that kept their trees — Plantation above all, Davie, the older streets of Hollywood — the roof’s busiest channel does double duty: a valley carries the runoff of two slopes through one line, and under a ficus or a live oak it does so while collecting debris twelve months a year.
Why here it never stops
Northern trees shed once; Broward’s canopy sheds always. Live oaks drop leaves and catkins through the spring, ficus sheds year-round, black olives stain and drop through their own calendar. The debris settles exactly where the water concentrates, and from June to September that water arrives most afternoons in volume. A clear valley sheds it; a loaded valley becomes a slow, permanently damp channel — and damp is the condition every other Broward ailment waits for: algae along the edges, granule loss under the mat of debris, corrosion under the wet metal, and in a hard downpour, water backing sideways under the courses.
None of it shows from the driveway. The debris settles below the sight line, the streaks read as shade, and the first visible symptom is often a ceiling stain at the room below the valley.
Construction and rhythm
On replacement, open metal valleys shed debris and water far better than closed shingle valleys — under canopy that is a durability decision, not a style. Wider valley metal buys margin on the treed lots, and algae-resistant covering earns its premium in the same places. Between replacements the rhythm is simple: valleys and gutters cleared before the rainy season opens, and again during it on the heaviest lots. No roof maintenance in this county costs less or is skipped more.