Wiktionary
ridge course
n. (context roofing English) The last or top course of roofing materials, such as tile, roll roofing, shingles, etc. that covers the ridge and overlaps the intersecting field roofing.
Usage examples of "ridge course".
Anything else would be discovered quickly, and they would be right back to the por- ridge course of the feast of suffering of the Bajoran and Federation inhabitants.