Also called Philadelphia Gutters, Pole Gutters, Flush Gutters and Standing Gutters, this gutter system is built on the plane of the roof, as opposed to Built-in or Box Gutters, which are recessed below the plane of the roof, usually at the eaves. Yankee gutters are common on older slate roofs.
Many home owners who have built-in or box gutters on their roofs, or Yankee gutters, don’t know the difference between them. The illustrations below, gleaned from old texts, show what Yankee gutters look like. A box gutter (built-in gutter) is shown immediately below.