Steal it without hesitation—that tiny break in surface tension does more to keep an underside clean over forty years than any coating on the market.

Just remember to stop the reveal 50mm shy of the returns, otherwise you're only trading a damp soffit for two permanent black streaks down the cheek of the wall.

Nothing beats surface tension and gravity doing the work instead of mastic. Are you having the precaster form that throat directly into the mould, or trusting the contractor to saw-cut it after?

Omitted one on a zinc fascia twenty years ago near Harlingen, and the wind drove runoff three meters backwards into the soffit. Water has zero respect for a pure line.

Stealing this constantly in studio—just don't place it too close to the front edge, or that little outer lip gets so thin it ends up spalling right off in the first freeze-thaw cycle.

Steal it every single time. It’s the humblest ten millimeters in building physics, and it saves a soffit from decades of ugly water tracks.

Steal it without hesitation. The way that quiet little throat keeps the soffit from streaking twenty years down the line is pure physics we somehow stopped drawing.

Steal it every time. It’s remarkable how that one strip tacked into the formwork keeps an entire elevation from streaking for fifty years.