Metal roof trim and flashing anatomy — ridge, eave, rake, valley, and wall
The trim BOM is what separates a real metal take-off from a bare panel count: ridge cap, eave/drip, rake, valley, and wall flashing each priced as linear feet ÷ ~10-ft sticks, plus foam closures at every rib line.
What this diagram shows
An oblique view of an L-shaped metal roof with each trim run highlighted and labeled. A ridge cap runs along the top; eave and drip edge run along the bottom edges; rake or gable trim runs down the gable-end slopes; a W-valley runs where two roof planes meet in the reentrant corner; and step or sidewall flashing runs where the roof abuts a chimney or wall. Inside and outside foam closures seal the panel ribs at the ridge and eave. All trim ships in roughly 10-foot sticks and laps 4 to 6 inches, so trim pieces equal each run length divided by the effective stick length, rounded up.
Metal Roofing Calculator
Free metal roofing calculator: panel count from NET coverage width, exposed-fastener screws or standing-seam clips, trim BOM, and underlayment. No signup.
