[See prec.] A portion of the roof of a house carried slightly beyond the wall at the gable-end, and made up underneath with mortar, to keep out rain, etc.
1668. Leybourn, Platf. Purch., 109. The Barge Courses must be struck with Lime and hair Mortar.
1727. Bradley, Fam. Dict., Barge-Course.
1835. Penny Cycl., III. 450/1. Barge-boards are often attached to the gables of old English houses, fixed near the extremity of the barge-course.